the ras protein normally regulates cell growth. a mutation that occurs in the gene encoding ras can cause ras to become overactive, which results in cancer. this means that ras is an example of a/an

The statement "A pulsed intensity is the average intensity for the pulse duration only. It does not include the listening time.: is false as pulsed intensity is the average intensity of the ultrasound wave during the pulse period, which is typically short in duration.

According to the American Institute of Ultrasound in Medicine (AIUM), the pulsed intensity is the average intensity of an ultrasound beam during the pulse duration, which is typically short in duration. A pulsed ultrasound wave is one in which the sound energy is sent out in a series of short pulses rather than continuously. When a pulsed wave is emitted, the pulse duration, pulse repetition frequency, and pulse intensity all have an impact on the overall intensity of the wave, which is sometimes referred to as the temporal-average intensity.

The pulse duration is the length of time that the ultrasound energy is being emitted, while the pulse repetition frequency is the number of pulses per second that are emitted by the ultrasound machine. The pulse intensity is the amount of energy per unit time that is contained within each pulse.Thus, A pulsed intensity is the average intensity of the ultrasound wave during the pulse period.

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For the body to produce niacin from tryptophan, enough quantities of vitamins B6 and B2 are required.

In healthy individuals, the kynurenine pathway converts less than 2% of the dietary tryptophan they consume into NAD (40). NAD is only partially synthesized from tryptophan and is dependent on enzymes that need riboflavin, vitamin B6, and heme (iron).

Vitamin B2 riboflavin, which is crucial for cell growth, development, and function in the body, aids in the release of energy from food. Moreover, it aids in the production of niacin from the amino acid tryptophan, which is a component of protein.

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DNA replication is considered semiconservative because "each daughter DNA molecule consists of one strand from the parent DNA molecule and one new strand" is the correct answer.

DNA replication is the process of copying DNA to create a new strand of DNA. During DNA replication, the DNA double helix unwinds and separates into two separate strands. Each of these strands serves as a template for the new strand of DNA. A new strand of DNA is built by matching up complementary nucleotides, the building blocks of DNA.

Once the new strand is complete, two identical DNA molecules have been created. Each daughter DNA molecule consists of one strand from the parent DNA molecule and one new strand.

This was first proposed by Watson and Crick in 1953. DNA replication is an essential process for the growth and repair of cells. Without DNA replication, cells would not be able to divide and grow.

Additionally, DNA replication plays a critical role in maintaining the integrity of the genetic material. Errors during DNA replication can lead to mutations that can cause diseases like cancer.

Therefore, DNA replication is considered semiconservative because of the two different types of strands in the newly synthesized DNA.

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Binocular vision can be affected by a variety of eye diseases and anomalies. Visual disorientation, reduction, and diplopia are examples of these. These abnormalities can also cause blurred vision, headaches, and eye discomfort, among other things.

Both sideways-facing and forward-facing irises have drawbacks. Animals with eyes on the side of their skulls have a blind area directly in front of them, so nature provides many prey animals with an excellent sense of scent to compensate. Forward-facing irises have drawbacks as well.Furthermore, expressing only a fraction of genes in each cell saves room because DNA must be unwound from its closely coiled structure in order to be transcribed and translated. If every protein was produced in every cell all of the time, cells would have to be huge. The regulation of gene translation is exceedingly complicated.

The grand scheme of cellular gene control. The method of regulating which genes in a cell's DNA are released is known as gene regulation (used to make a functional product such as a protein). This website's material should not be used in place of expert medical care or advice. If you have any concerns about your health, speak with your doctor.

Answer:

A range of eye illnesses and anomalies can impair binocular vision. These include visual confusion, diminution, and diplopia. These anomalies can also cause blurred vision, headaches, and ocular pain.

Both sideways and forward-facing eyes have disadvantages. Because animals with eyes on the side of their heads have a blind region immediately in front of them, nature gives many prey animals with a keen sense of smell to adjust. Forward-facing pupils have some disadvantages as well. In addition, because DNA must be unraveled from its tightly coiled structure to be transcribed and translated, expressing only a portion of the genes in each cell saves space.

Explanation:

Brainliest pls :)

A human liver is very different in structure and function from a nerve cell in the same person. This is best explained by the fact that (a) Different genes function in each type of cell.

Nerve cell is the specialized cell belonging to the nervous system that functions to transmit information all across the body. The nerve cell is also known by the name neuron and it transmits information in the forms of electrical signals.

Genes are the basic hereditary factors that contain the information for the cell to function properly. The genetic material present in each cell of the body is same, yet they functional differently because the expression of genes depends upon the location of the cell and various other factors.

Therefore, the correct answer is option 'a'.

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A molecular subunit is a small molecule that is used as a building block to assemble a larger molecule or macromolecule.

These subunits can be identical or different in structure, and they are linked together through chemical bonds to form the larger molecule.

In biological systems, macromolecules such as proteins, nucleic acids, and polysaccharides are composed of subunits that are specific to each type of molecule. For example, proteins are made up of amino acid subunits that are linked together through peptide bonds, while nucleic acids are made up of nucleotide subunits that are linked together through phosphodiester bonds.

The specific arrangement and sequence of subunits in a macromolecule determine its unique structure and function. By assembling these subunits in different ways, the cell can generate an enormous diversity of macromolecules, allowing it to carry out a wide range of biological processes.

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Awareness of gender roles and expectations tends to intensify during adolescence.

What is Adolescence?

Adolescence is a time of rapid growth and change, both physically and emotionally. During this period, individuals typically undergo significant cognitive and social development as well, as they begin to establish their own identity and navigate relationships with peers and family members.

It typically begins with the onset of puberty, which is marked by physical changes such as the development of secondary sexual characteristics, and lasts until the individual has achieved full physical and psychological maturity.

This is because during adolescence, individuals become more aware of societal expectations and norms regarding gender roles, which can lead to an increased focus on conforming to these expectations. Adolescents may also become more aware of their own gender identity and how it aligns or differs from societal expectations. This heightened awareness of gender roles and expectations can lead to an increased emphasis on conforming to traditional gender roles, or it can lead to a questioning or challenging of these roles.

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Answer:

Cholera is an extremely dangerous disease that can cause severe watery diarrhea. It takes between 12 hours to 5 days for a person to show symptoms after ingesting contaminated food and/or water. Cholera affects both children and adults and can kill within hours if untreated.

Sexual reproduction has not been observed in Bd. A Bd sporangium initially contains a single, haploid cell. The following processes must be involved in generating the multiple zoospores eventually produced by each sporangium is  A) 1 and 2 that are 1. S phase 2. cytokinesis 3. mitosis

Mitosis is the process of cell division in which a single cell divides into two daughter cells that are identical to the original parent cell in terms of genetic material. Cell growth, replacement of worn-out cells, and asexual reproduction are all part of the normal life cycle of multicellular organisms, and they are all processes that rely on mitosis.

Cytokinesis is a phase of cell division in which the cytoplasmic contents of a single eukaryotic cell are separated into two daughter cells. It usually occurs during the telophase phase of mitosis, but it can also occur independently, resulting in the formation of haploid cells. Bd sporangia contain haploid cells, and meiosis is not involved in the generation of zoospores, which rules out choice 4.Hence, the correct options are A) 1 and 2.

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Cell body with a single process that divides into two branches and functions as an axon only the receptor ends of the peripheral process function as dendrites is called as biphasic neuron.

The receptor ends of the  supplemental( distal) process function as dendrites, while the proximal process functions as an axon. Biphasic neurons are  set up in the  supplemental nervous system and are involved in the transmission of impulses from the  sensitive receptors to the central nervous system.

The main function of biphasic neurons is to bear electrical signals from one neuron to another. Biphasic neurons have an important  part in controlling muscle movement, regulating hormonal  concealment, and transmitting  sensitive information from the body to the brain.

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The fibrous protein that winds alone the groove of the F actin double helix and blocks the myosin-binding sites on the actin filaments is called Tropomyosin.

Tropomyosins are rod- suchlike dimers which form head- to- tail polymers along the length of actin  fibers and regulate the access of actin list proteins to the  fibers. Tropomyosin is a two- stranded  nascence- spiral,  curled coil protein  set up in  numerous beast and fungal cells.

In  creatures, it's an important  element of the muscular system which works in confluence with troponin to regulate muscle  compression. It's present in smooth and striated muscle apkins, which can be  set up in  colorful organs and body systems, including the heart, blood vessels, respiratory system, and digestive system. In fungi, tropomyosin is  set up in cell walls and helps maintain the structural integrity of cells.

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The covalent bond between the carboxyl group of one amino acid and the amino group of the next is called a peptide bond.

This bond is formed through a dehydration reaction, in which a molecule of water is removed, allowing the carboxyl group (-COOH) of one amino acid to join with the amino group (-NH2) of the next, forming a bond (-CO-NH-) between the two amino acids.

This process repeats, forming a long chain of amino acids known as a polypeptide. Peptide bonds are very strong and contribute to the stability and shape of proteins, which are made up of one or more polypeptide chains. The sequence of amino acids in a polypeptide chain determines the specific properties and functions of the protein.

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The vision in darkness is more effective when focusing away from the fovea rather than focusing directly on the fovea due to the reason that focusing directly on the fovea is the best way of seeing small details when there is plenty of light available.

The fovea is the central area of the retina that is responsible for the majority of our visual acuity. It is where the highest density of photoreceptor cells is located, which allows us to see the finest details. The fovea is a tiny pit in the retina that measures just 0.33 mm in diameter.

Focusing away from the fovea can be more effective in darkness because there are more rod cells located in the retina outside of the fovea. Rod cells are more sensitive to light and are therefore better suited to low-light conditions. By focusing away from the fovea, we can take advantage of these rod cells and improve our ability to see in low-light conditions.

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There are five chemically distinct classes of human immunoglobulins: IgA, IgD, IgE, IgG, and IgM. IgA is the most abundant and makes up 10-15% of serum immunoglobulins.

IgD is present in very small amounts and is found on the surface of B cells. IgE is involved in allergic reactions and is found in very small concentrations in the serum. IgG is the most abundant serum immunoglobulin and makes up 75-80% of serum immunoglobulins. IgM is the largest immunoglobulin and is found in very low concentrations in serum, but is important in the early stages of the immune response. Each class of immunoglobulin is made up of different subtypes which may have different functions, but all have the same basic structure. Immunoglobulins can recognize foreign antigens, form a complex with them, and trigger an immune response. They also have an important role in defending the body against infection, and in controlling inflammatory responses.

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The given statement is False. For any given species, cells in metaphase II of meiosis would contain half of the genetic material than cells in metaphase of mitosis.

Mitosis is a process in which a single cell divides into two genetically identical daughter cells. During mitosis, the cell nucleus and cytoplasm both divide to form two daughter cells. Mitosis is responsible for asexual reproduction in unicellular organisms and for the growth and repair of tissues in multicellular organisms.

Meiosis is a process in which a diploid cell divides into four haploid daughter cells, each with half the number of chromosomes as the parent cell. Meiosis produces gametes for sexual reproduction. Each chromosome has two sister chromatids and two homologous chromosomes.

Metaphase is the stage of mitosis in which the chromosomes align along the metaphase plate. The spindle fibers attach to the kinetochores of the chromosomes, and the chromosomes are pulled to the centre of the cell.

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The mechanism that causes induced mutations to occur is usually the result of exposure to a mutagen, which is a substance that causes a permanent change in a DNA sequence.

Mutagens can be physical, such as UV radiation, or chemical, such as certain types of toxins. Exposure to these agents causes errors during DNA replication, resulting in the insertion or deletion of one or more base pairs. This changes the genetic code and can lead to a mutation.
In contrast, spontaneous chemical reactions during DNA replication and errors during meiosis are not the cause of induced mutations. While both processes can lead to mutations, they are considered “spontaneous” because they occur naturally and not as a result of external factors.
In summary, induced mutations occur when a mutagen causes an error during DNA replication, resulting in the insertion or deletion of one or more base pairs. This alters the genetic code and leads to a mutation.

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The correct answer is D: Allosteric Regulation.

Allosteric regulation is a process in which a molecule binds to an enzyme at a site that is not its active site, causing a conformational change and either activating or inhibiting the enzyme's activity. In the case of citric acid and phosphofructokinase, citric acid binds to a regulatory site and causes the enzyme to become inactive. This is an example of allosteric regulation because it is a change in enzyme activity caused by a molecule binding to a non-active site.

In allosteric regulation, a molecule called a ligand binds to a regulatory site on an enzyme and causes a conformational change. This change either activates or inhibits the enzyme's activity. In the case of phosphofructokinase, the binding of citric acid to the regulatory site causes the enzyme to become inactive, resulting in the inhibition of the enzyme. This inhibition prevents the enzyme from catalyzing the conversion of fructose 6-phosphate to fructose 1,6-bisphosphate, which is an essential step in glycolysis.

In summary, high levels of citric acid inhibit the enzyme phosphofructokinase by binding to the enzyme at a regulatory site and causing a conformational change that inhibits the enzyme's activity. This is an example of allosteric regulation, where a molecule binds to a regulatory site and causes a conformational change that either activates or inhibits the enzyme's activity.

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The hydrophilic side chains will be on the exterior where they can interact with water molecules in the aqueous environment. Option B

The correct orientation of amino acid side chains in the tertiary structure of a protein in an aqueous environment is that the hydrophilic (polar) side chains will be on the exterior where they can interact with water molecules in the aqueous environment, while the hydrophobic (nonpolar) side chains will be on the interior where they can avoid interacting with water molecules in the aqueous environment.

This orientation is due to the hydrophobic effect, which causes the nonpolar amino acid side chains to cluster together in the interior of the protein, away from the surrounding water molecules

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The following are not stereogenic centers by this definition is

It is a well-known fact that stereoisomerism exists when compounds have the same molecular formula and the same connectivity, but they differ only in the spatial arrangements of atoms or groups in the molecule. One of the most common types of stereoisomerism is chirality, which refers to a molecule's non-superimposable mirror image that cannot be superimposed on its image. Therefore, stereogenic centers are the points in the molecule that create chirality.

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NASA's relationship with the public is beneficial, and reduced government funding could have a direct impact on us as consumers. It is important that NASA continues to receive the funding it needs to continue its research and development, and to make the discoveries that will benefit the public.

NASA technologies have had a significant impact on our daily lives. For example, products such as GPS and communication satellites help with navigation, while advances in research and development of new materials have led to the development of new consumer products and services. In addition, advancements in technology have enabled us to explore the universe in ways that we previously could not have imagined.
The reciprocal relationship between NASA and the public is mostly beneficial. NASA has been able to share the results of its research and development with the public, which has in turn enabled the public to make use of the information and technology in their daily lives. Furthermore, NASA has provided educational resources for the public, such as its Earth & Space Science course. This has allowed students to gain access to content related to space exploration and STEM topics, which can help them become more informed about the world around them.
Reduced government funding of NASA would have a direct impact on us as consumers. For instance, fewer resources would be available for research and development of new technologies, which could limit the number of consumer products and services available. This could also limit our ability to explore the universe and to make discoveries. Additionally, fewer resources could mean fewer educational opportunities and resources, meaning that students may not be able to access the same level of education as they currently do.
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Bryophytes are a group of terrestrial plants that are haploid in their dominant generation. bryophytes, also known as bryophytes, have a unique life cycle and reproductive strategy that involves alternating between haploid and diploid generations.

The group of terrestrial plants that are haploid in their dominant generation are called bryophytes. Bryophytes are an ancient and diverse group of terrestrial plants that have been around for over 400 million years.

Bryophytes are a group of non-vascular plants that are commonly known as mosses, liverworts, and hornworts. These plants are simple in structure and have an important place in the ecosystem. Bryophytes are the oldest land plants and were the first to colonize terrestrial habitats.The life cycle of bryophytesIn the life cycle of bryophytes, the haploid stage is the dominant generation. Bryophytes have a life cycle that is characterized by an alternation of generations between the haploid gametophyte stage and the diploid sporophyte stage.

The haploid gametophyte stage is the dominant generation in the life cycle of bryophytes. The gametophyte stage is where the plant produces the sex cells.The sporophyte stage is the result of the fusion of the sex cells produced by the gametophyte stage. The sporophyte is dependent on the gametophyte stage for its nutrition and development. The sporophyte stage produces spores that are released into the environment, where they can germinate and grow into new gametophytes. The cycle then repeats itself.

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The correct order of taxonomic levels with decreasing number of species is: 1. Kingdom, 2. Phylum, 3. Class, 4. Order, 5. Family, 6. Genus, and 7. Species.

Taxonomic levels are the categories used to classify living organisms into a hierarchy of groups. Starting from the largest group, which is Kingdom, we move down to smaller and more specific groups until we reach the smallest group, which is Species.

The sequence goes as follows: 1. Kingdom, 2. Phylum, 3. Class, 4. Order, 5. Family, 6. Genus, and 7. Species.

Here, Phylum has the most number of species after Kingdom while Species has the fewest number of species. Therefore, the order of the taxonomic levels from the top down is Phylum, Class, Order, Family, Genus, and Species.

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Use the UCSC Genome Browser (http://genome.ucsc.edu/) the amino acids are in the protein encoded by the EFNB3 gene is 330 amino acids.

UCSC Genome Browser is a web-based browser that includes genomic sequences and annotations for a wide range of species. To determine how many amino acids are in the protein encoded by the EFNB3 gene, follow the steps outlined below, 1. Visit the UCSC Genome Browser website by going to http://genome.ucsc.edu/. 2. Choose the "Genome Browser" option from the "Genomes" menu. 3. Choose the "Human" genome from the "Genome" drop-down menu.

Then to locate the gene, 4. type "EFNB3" into the search box and press enter. 5. Select the "RefSeq" track to see the RefSeq annotation for the EFNB3 gene. 6. Click on the "Gene Details" link.7. The protein encoded by the EFNB3 gene is 330 amino acids long. Hence, the answer is 330. The answer is option A.330

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Non-Mendelian inheritance is any pattern of inheritance in which the traits do not segregate in accordance with Mendel's laws. These include epistasis, codominance, incomplete dominance, polygenic inheritance, etc.

Non-Mendelian inheritance are the inheritance patterns in which the genes do not segregate in accordance with the Mendel's laws.

Multiple genes influence a phenotype: Epistatic interaction.

In A and B blood types: Codominance. This means that when an organism has two different alleles (i.e., is a heterozygote), it will express both at the same time.

When two different alleles are inherited, both traits are expressed at the same time, but the traits produce an intermediate phenotype rather than a dominant trait masking a recessive trait: Incomplete dominance.

Traits are controlled by many genes instead of traits controlled by alleles from one gene: Polygenic inheritance.

Two alleles are both expressed equally rather than a dominant allele taking complete control over a recessive allele: Codominance.

Two genes can interact to produce a phenotype, such that one gene can override another: Epistatic interaction.

Familial hypercholesterolemia: Autosomal dominant inheritance.

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The RNA part of telomerase has several functions. Telomerase is an enzyme that plays a vital role in maintaining the length of telomeres. Telomeres are the repetitive DNA sequences present at the ends of chromosomes that protect the genetic information from getting degraded during cell division. The RNA part of telomerase acts as a template for the synthesis of telomeric DNA during the extension of telomeres. Telomeric DNA comprises repeated sequences of TTAGGG.

The RNA part of telomerase is responsible for recognizing the telomere ends and initiating the extension process. It provides a template for the synthesis of telomeric DNA. The RNA part of telomerase also helps in stabilizing the telomerase complex and prevents it from getting degraded by cellular nucleases. The RNA part of telomerase is essential for the catalytic activity of telomerase.

The RNA part of telomerase is also involved in regulating the activity of telomerase. Telomerase activity is controlled by several factors, including the length and structure of the RNA part of telomerase. The RNA part of telomerase is also involved in the regulation of telomerase localization, targeting, and activity. In summary, the RNA part of telomerase plays a crucial role in the extension and maintenance of telomeres. It acts as a template for the synthesis of telomeric DNA, stabilizes the telomerase complex, and regulates the activity of telomerase.

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When neurotransmitters are released in the synaptic cleft they diffuse to the postsynaptic neuron and bind to ligand-gated receptor proteins which produce excitatory or inhibitory postsynaptic potentials in the postsynaptic membrane.

Excitatory postsynaptic potentials (EPSPs) are depolarizations of the postsynaptic membrane caused by the binding of neurotransmitters to ionotropic receptors that allow positively charged ions to enter the cell. This causes the membrane potential to become less negative, bringing the cell closer to its threshold for firing an action potential.Inhibitory postsynaptic potentials (IPSPs) are hyperpolarizations of the postsynaptic membrane caused by the binding of neurotransmitters to ionotropic receptors that allow negatively charged ions to enter the cell or positively charged ions to leave the cell. This causes the membrane potential to become more negative, moving the cell farther away from its threshold for firing an action potential.The combined effect of all the EPSPs and IPSPs occurring at any given moment determines whether or not the postsynaptic neuron will fire an action potential. If the net effect is excitatory, the neuron will fire; if the net effect is inhibitory, the neuron will not fire.

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Answer:

The uvula

Explanation:

It is a small flap of tissue seen at the back of the throat between the tonsils.

1.  The white blood cells would you expect to find in high numbers during a helminth infection but not during a bacterial infection is Eosinophil. Therefore, the correct option is option 4.

2. Major Histocompatability Complex (MHC) is properly decried as Directed selection creates complexity and differences between cells in the same individual. Therefore, the correct option is option 1.


1. Eosinophils are a type of white blood cell that plays an important role in defending against helminth parasites, which are eukaryotes, but not bacteria. An eosinophil is a white blood cell involved in controlling infections. Hence, Eosinophil is the white blood cells that would you expect to find in high numbers during a helminth infection but not during a bacterial infection.

2. Directed selection creates complexity and differences between cells in the same individual describes Major Histocompatability Complex (MHC). The Major Histocompatibility Complex (MHC) is a set of molecules expressed on the surface of cells that play a crucial role in recognizing intracellular and extracellular pathogens, as well as cancer cells, and initiating the adaptive immune response.

MHC is a protein complex that helps the immune system recognize foreign substances, and directed selection plays an important role in creating variation and complexity between cells in the same individual.  MHC molecules are polymorphic, which means that they are highly variable between individuals, which is due to directed selection that creates complexity and differences between cells in the same individual.

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Plasma is mainly composed of water.

Plasma is the fluid portion of blood that accounts for around 55% of total blood volume. It is made up mostly of water, with other molecules like hormones, nutrients, electrolytes, and plasma proteins dissolved in it.

Plasma is essential to life since it is responsible for transporting all of these molecules throughout the body. They are the largest and most complex of plasma molecules.

Plasma is the liquid portion of blood and is composed mainly of water (91-92%), with proteins (7-8%) and other substances (1%) making up the remainder. Also, plasma proteins do not contain sodium or calcium.

The correct answer is that plasma is mostly composed of water. Plasma consists of 90 percent water and 10 percent solutes, including nutrients, electrolytes, and gases.

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