Answer:
Proteins in the cell membrane that identify the cell are called cell-surface markers (option C).
Explanation:
Cell surface markers are integral membrane proteins, whose function is to identify specific cell lines, allowing intercellular recognition and communication.
The specific type of cell marker provides the basis for cell classification, allowing studies to be performed on immune system cells, stem cells or atypical cells such as those found in cancer.
The other options are not correct because:
A. Enzymes are proteins that participate in metabolic reactions.
B. Transport proteins, although they are also part of membrane proteins, perominate the passage of specific substances through the membrane.
D. Receptor proteins allow the identification of specific molecules, such as hormones, to couple with them and promote actions inside the cell.
Proteins in the cell membrane that identify the cell are called CELL-SURFACE markers (Option C).
Cell surface markers are specific proteins localized on the cell surface or glycoproteins, which can be used as molecular markers that evidence specific cell types/lineages.
For example, cell surface markers can be used for the identification of the lineage and/or phase of differentiation in lymphocytes such as T cells and B cells.
In lymphocytes, the cell surface markers can be divided into three classes: surface immunoglobulins, differentiation antigens, and membrane receptors.
In conclusion, proteins in the cell membrane that identify the cell are called CELL-SURFACE markers (Option C).
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Most scientists accept the hypothesis that the earliest life-forms in Earth evolved in an environment quite different from our own. Sort these characteristics bass on whether they describe early Earth or modern Earth.
-significant amounts of oxygen in the atmosphere
-most of the planet covered in liquid water
-carbon dioxide levels balance by processes of living organisms
-significant amounts of volatile gases in the atmosphere
-most of the planets water in gaseous form
-large amounts of carbon dioxide in the atmosphere
Answer:
i am a very good kid its my job to be if not i will get in trouble
Which organelle uses nutrients like sugar and makes energy for the cell to live?
Answer:
Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?
Explanation:
Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses nutrients like sugar and makes energy for the cell to live?Which organelle uses ne sugar and makes energy for the cell to live?Which organelle uses nutrients l
A balloon’s initial temperature is 45.0°c. The balloon’s final volume is 4.0-L with a temperature of 30.0°c. What is the initial volume of the balloon?
Answer:
45+273=318
30+273=303
X/318=4/303
303x=1272/303
X =4.2 L
Explanation:
Diatoms are planktonic unicellular eukaryotes commonly found in oceans and lakes. They contain chloroplasts that have four membranes. These four membranes are evidence of:___________
a. budding of chloroplasts from the endoplasmic reticulum
b. primary endosymbiosis
c. secondary endosymbiosis
d. evolution from proteobacteria
Diatoms contain chloroplasts that have four membranes. These four membranes are evidence of secondary endosymbiosis (Option c).
What is secondary endosymbiosis?Secondary endosymbiosis is a hypothesis used to explain why diatom chloroplasts have four membranes.
According to this hypothesis, diatoms received different genes from distinct photosynthetic and non-photosynthetic ancestors.
The acquisition of genes of different ancestors led to diatoms having chloroplasts with four membranes.
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Use the Pyruvate Concentration Table to answer the question.
The researcher adds a chemical to the cytosol at the one-hour mark. The full effect of the chemical can be observed at the two-hour mark. Which of the following hypotheses regarding the effect of the chemical is MOST reasonable?
A.
The chemical inhibits the carrier protein for pyruvate in the mitochondrial inner membrane.
B.
The chemical inhibits the carrier protein for glucose in the plasma membrane.
C.
The chemical inhibits the carrier protein for glucose in the mitochondrial inner membrane.
D.
The chemical inhibits the protein channels in the mitochondrial outer membrane.
Answer:
The Answer is A. the chemical inhibits the carrier potein for pyruvate in the mitochondrial inner membrane.
Explanation:
I just took the test so I know this is right
The statement regarding the effect of the chemical that is reasonable is that the chemical inhibits the carrier protein for pyruvate in the mitochondrial inner membrane. The correct option is A.
What is carrier protein?Carrier proteins bind the specific solute to be transported and then go through a series of conformational changes to move the bound solute across the membrane.
Carrier proteins bind specific solutes and transport them across the lipid bilayer by going through conformational changes that expose the solute-binding site on one side of the membrane and then the other.
Carrier proteins, like other membrane transport proteins, are found in lipid bilayer cell structures such as cell membranes, mitochondria, and chloroplasts.
A reasonable statement about the chemical's effect is that it inhibits the pyruvate carrier protein in the mitochondrial inner membrane.
Thus, the correct option is A.
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Can ATP be produced in the absence of oxygen
Answer I believe it is yes, not 100% Sure though.
Explanation:
In the absence of oxygen, the net yield of ATP produced is 2 per glucose molecule. ATP is formed in the presence of oxygen in the process known as aerobic cellular respiration. This process occurs within mitochondria of eukaryotic cells.
Which label on the diagram to the right indicates the site of blood filtration?
A
B
C
Looking at the image and the labelings critically, the site of blood filtration, otherwise known as the glomerulus, is labeled as A.
The glomerulusThe kidney functions primarily in the process of excreting substances such as urine and toxic drugs.
The excretory substances in the blood are filtered off in the glomerulus of the kidney.
The structure marked A represents the glomerulus. C is known as the Bowman's capsule.
Thus, blood filtration happens at A.
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Answer:
A
Explanation:
edge 2022
Which term is defined as the physical features of the land?
cartography
topography
paleontology
geology
Answer:
It is cartography
Answer:
Geology
Explanation:
ge·ol·o·gy
/jēˈäləjē/
Learn to pronounce
noun
the science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
the geological features of an area.
"the geology of the Outer Hebrides"
the geological features of a planetary body.
"the geology of the surface of Mars"
List one advantage of using a food chain instead of a food web
Answer:
The food chain balances the ecosystem
Which of the following is the correct Lewis structure diagram for Sodium (Na)? The letters Na with one dot The letters Na with two dots The letters Na with three dots The letters Na with four dots
Answer:
One
Explanation:
Sodium (Na) has one valence electron so it gets one dot.
A certain species of animal has six pairs of chromosomes. How many DNA molecules are present in the nuclei of these animals during G2 phase? View Available Hint(s)for Part B 6 12 48 24
Answer:
The answer is 24 DNA molecules.
Explanation:
A certain species of animal has six pairs of chromosomes. How many DNA molecules are present in the nuclei of these animals during G2 phase? 24. Each chromosome (12) is replicated, so there are 24 DNA molecules in the nucleus during G2 phase.
this is an evolutionary ( also known as phylogenetic) tree. what is the purpose of a phylogenetic tree?
A. mapping the evolutionary progress of
organisms and where they branch to form new organisms
B. tracking every species that has ever lived
on earth
C. marking where each species lives on earth
Answer:
A
Explanation:
It visually demonstrates organisms evolutionary path
Nucleic acids exhibit specific nitrogenous base pairing within their structures. All of the following base pairings are found in deoxyribonucleic acid EXCEPT: a. cytosine and guanine b. adenine and uracil c. adenine and thymine d. neither A nor B are found
ATP is formed from the breakdown of glucose in____(1)_____while glucose is formed form solar energy in ___(2)____.
Answer:
i belive its the first one, if not let me know
Explanation:
Compare the shape of a normal red blood cell to that of a red blood cell in
someone with sickle cell anemia.
What are the main components needed to insure ecosystem stability?
a.
estuary, savanna, and tundra
b.
primary and secondary succession
c.
food, water, shelter and biodiversity
d.
moderate climate, sufficient space, and adequate sunli
Answer:
C.
Explanation:
The main components needed to insure ecosystem stability.
During DNA replication, a DNA strand that has the bases CTAGGT produces a strand with the bases
TCGAAC
GATCCA
AGCTTG
GAUCCA.
Answer:
B
Explanation:
Adenine (A) is complementary to Thymine (T). And Guanine (G) is complementary to Cytosine (C).
Answer: The answer is GATCCA
Explanation:
Select all that apply.
An ecosystem could probably survive without _____.
carnivores
producers
Sun
water
herbivores
climate
soil
decomposers
Why does the Earth experience two high and two low tides each day?
Answer:
When the moon pulls on one side of Earth, the other side experiences high tide as well.
Explanation:
During the day, the moon revolves around Earth and when it does, it pulls on the oceans, causing high tide number one. But, when the moon pulls on one side of the Earth, the other side also bulges out, causing high tide number two. Think of this as a squishy ball. When you hold it with your index finger on the top and your thumb on the bottom and squeeze it, both sides of the ball bulge out. This is what happens to the Earth under the moon's gravitational pull.
The overall charge of an atom is electrically neutral even though it contains Particles.
PLEASE HELP
Answer:
The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. Most of an atom's mass is in its nucleus; the mass of an electron is only 1/1836 the mass of the lightest nucleus, that of hydrogen.
Explanation:
What are the roles of the DNA, RNA Polymerase, mRNA, tRNA and ribosome in protein synthesis
Answer:
mRNA molecules carry the coding sequences for protein synthesis and are called transcripts. rRNA molecules form the core of a cell's ribosomes, the structures in which protein synthesis takes place. tRNA molecules carry amino acids to the ribosomes during protein synthesis. In eukaryotic cells, each class of RNA has its own polymerase, whereas in prokaryotic cells, a single RNA polymerase synthesizes the different class of RNA. Other types of RNA also exist but are not as well understood, although they appear to play regulatory roles in gene expression and also be involved in protection against invading viruses.
Explanation:
Why are the nuclear reactions that occur in the center of the Sun critical to life on Earth?
a- life on earth depends on the energy and hydrogen released by the sun's nuclear reaction
b- life on earth depends on the heat and carbon released by the sun's nuclear reactions.
c- life on earth depends on the heat and electromagnetic radiation released by the sun's nuclear reactions.
d- life on earth depends on the energy and oxygen released by the sun's nuclear reactions.
Answer:
c
Explanation:
the earth needs the suns energy and heat
The reason why the nuclear reactions that occur in the center of the Sun are critical to life on Earth is: C. life on earth depends on the heat and electromagnetic radiation released by the sun's nuclear reactions.
A nuclear reaction can be defined as a type of chemical reaction in which the nucleus of an atom is transformed by either being joined (fusion) or split (fission) with the nucleus of another radioactive element's atom.
This ultimately implies that, a nuclear reaction is always accompanied with the release of energy.
On a related note, the Sun is typically characterized by nuclear reactions taking place at its center, which result in the release of radiant (heat) energy and electromagnetic radiation into the solar system.
Basically, this radiant (heat) energy and electromagnetic radiation are essential and very important to life because they are applicable and beneficial to humankind in several areas.
For example, radiant (heat) energy from the Sun in the morning, is a good source of vitamin.
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write 4 difference between pollination and fertilization
Fertilization is the joining of an egge cell and a sperm cell, While in pollination you transfer of pollen to a stigma and makes fertlization. Fertilization would be the reaction and pollination is the what yo do when you do it. In fertilization it can be about whatever organism and pollination is about a flower or plant.
Explanation:
i dont know all but i can tell you some, i hope i helped a little
Name
Name the 3 most important cell parts?
Question 6 of 10 How many glucose molecules can be formed by 6 molecules of carbon dioxide? OA. 18 O B. 1 O c. 12 OD. 6
Describe the major differences between the ecological niches of humans and cockroaches. Are these two species in competition? If so, how do they manage to
coexist?
The major differences between the ecological niches of humans and cockroaches depend on the functional role they play, the space they live, and the group (trophic level) they belong.
What is an Ecological niche?An ecological niche can be regarded as an area or set of environmental factors or the surroundings of an individual where they perform their functional role.
Humans being omnivores have a generalized niche where they particularly have many options to play a functional role (feeding habit).
Cockroaches play the role of decomposers which is also an important part of any ecosystem. Living organisms are interdependent, so they need each other in order to survive. Therefore, it is wrong to say that humans and cockroaches are in competition. Cockroaches unlike humans live in really dirty and dark places because in such conditions they easily find food. While humans take a rest in dark (night) and search for their food in the daytime.
Humans take fresh and cooked food, while cockroaches shred dead and decaying organic matter into smaller pieces so that it would be eaten by recycling bacteria.
Therefore, these two different species are not in direct competition and survive without affecting each other's ecological niche.
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Find the mass of an object that has a density of 1.5 cm3 and has a volume of 8 cm3
The picture below shows a large rock and a container of water. The rock and the water have the same mass and temperature.
What will MOST LIKELY happen when the rock and the water receive the same amount of heat energy?
The water will transfer heat to the rock.
The rock will transfer heat to the water.
The temperature of the rock will rise faster.
The temperature of the water will rise faster.
Answer: The temperature of the rock will rise faster.
Explanation:
C6H12O6 + 602 = 6CO2 +___
+ Energy
What goes in the missing blank?
1.602
2.6H2O
3.6CO2
4.C6H12O2
5.Energy
PLEASE WRITE IN YOUR OWN WORDS THANK YOU.
1. Summarize the three parts of the cell theory.
2 .Name 3 structures that Eukaryotic and Prokaryotic cells have common.
3. Differentiate (give the differences) between prokaryotic cells and eukaryotic cells.
4. Give one example of a specialized animal cell. Explain one structural feature that help it to do it's special job.
5. Give one example of a specialized plant cell. Explain one structural feature that help it to do it's special job.
6. What are three factors that affect the rate of diffusion? explain the effect of each factor.
7. What is the difference between simple diffusion and facilitated diffusion?
8. Compare (give similarities and differences) between diffusion and osmosis.
9. Why are diffusion and osmosis are important for living organisms?
Answer/Explanation:
[1] The three parts of the cell theory is all organisms are made of cells. Cells are the smallest unit of life and new cells arise from existing cells.
[2] The three structure that Eukaryotic and Prokaryotic cells have common is plasma membrane, ribosomes, cytoplasm, and DNA.
[3] The difference between prokaryotic cells and eukaryotic cells is prokaryotic cells has no nucleus while, eukaryotic cells have a nucleus.
[4] One example of a specialized animal cell is Muscle Cell. Muscle cells bring parts of the body closer together. They contain protein fibres that can contract when energy is available, making the cells shorter.
[5] One example of a specialized plant cell is cell wall. Cell wall shapes, supports, and protects the cell. It prevents the cell from absorbing too much water and bursting.
[6] The three factors that affect the rate of diffusion is temperature, concentration gradient, size of the molecule.
The size of the molecule: The smaller the molecule such as gas, the faster the rate of diffusion while the larger the molecules (liquid) the slower the rate of diffusionConcentration gradient: Diffusion takes place as long as there is a difference between the concentration gradient of substances across a barrier. The more is the concentration difference, the higher is the driving force, the faster the rate of diffusion. When the concentrations of the substance on either side of the barrier become equal, the diffusion stops.Temperature:The higher the temperature is, the faster the speed of diffusion. Temperature increases the K.E. (kinetic energy) of a molecule and it helps to move the molecule faster and hence the speed of diffusion increases.[7] The difference between simple diffusion and facilitated diffusion is simple diffusion, the movement of particles occurs along the direction of the concentration gradient. While in facilitated diffusion, the movement of molecules can occur both in direction and opposite of the concentration gradient.
[8] The similarities between diffusion and osmosis is they both particles move from an area of higher concentration to one of lower concentration. The difference between diffusion and osmosis is diffusion can occur in any mixture, including one that includes a semipermeable membrane, while osmosis always occurs across a semipermeable membrane.
[9] Diffusion and osmosis are important for living organisms because diffusion and osmosis both even forces inside cells and organisms as a total, expand water, nutrients and necessary chemicals from areas that contain a high concentration to areas that contain a low concentration.
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