Answer:
A. DNA polymerase pairing A with G
Explanation:
Adenine (A) always pairs with thymine (T), and cytosine (C) always pairs with guanine (G).
DNA polymerase pairing A with G would cause an error in DNA replication. The correct option is A.
An error in DNA replication occurs when an incorrect nucleotide is inserted during the replication process.
DNA polymerase is responsible for synthesizing a new DNA strand by adding complementary nucleotides to the existing template strand.
It ensures the accuracy of replication by matching each nucleotide with its complementary partner (A with T and G with C).
If DNA polymerase pairs A with G instead of A with T, it results in a mismatched base pair.
This is considered an error in DNA replication since it introduces a mutation in the newly synthesized DNA strand.
The fidelity of DNA replication relies on the correct base pairing and proofreading mechanisms of DNA polymerase to minimize errors and maintain the integrity of the genetic information.
Thus, the correct option is A.
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Scientists have studied a fruit fly, Drosophila, to better understand early embryonic development and have discovered that the cell cycle changes as embryonic development proceeds. Model A represents the first 13 cell cycles after fertilization, which only includes two phases. Model B represents cell cycles 14 through 16, which are more complex and include a G2 phase. The figure shows two circular models, labeled Model A and Model B, that represent the cell cycle of fruit flies after fertilization. Model A represents cell cycles 1 through 13, and it contains two phases. Model B represents cell cycles 14 through 16, and it contains three phases.
What of the following explains the advantage of a G2 phase during embryonic development?
A Cells can undergo the cell cycle more quickly with a G 2 phase.
B Cells can replicate more DNA with a G2 phase.
C Cells are checked for DNA damage before entering mitosis with a G2 phase.
D Cells are able to produce two new daughter cells with a G2 phase.
Answer:
C. Cells are checked for DNA damage before entering mitosis with a G2 phase.
Explanation:
G2 phase is very important phase of cell division in which cells are checked for DNA damage before entering mitosis with a G2 phase as well as correct duplication of the DNA is also verified and cell proteins that are necessary for cell division are also produced. This phase comes after S stage in which replication of DNA occurs so this G2 phase check the damages before starting of mitosis.
How is carbon moving between the air and found decreasing
Answer:
It moves with the help of hydrogen
Which statement best explains how a light wave behaves when moving from air to water?A:it speeds up and bands B:it slows down and bands C:it speeds up and continues straight D:it slows down and continues straight.
Answer:
it speeds up and bends
Explanation:
common sense lol
The statement that best explains how a light wave behaves when moving from air to water is "it slows down and continues straight." That is the last option, i.e., option D, as light travels more slowly in water.
What is the significance of the waves at different mediums?Waves react differently in different mediums, such as when the phenomenon of refraction is used in many optical devices such as lenses, prisms, and mirrors, and these devices change the property of light to slow down and bend when moving from one medium to another. In microscopes and telescopes, the study of light refraction has provided important insights.
Hence, the statement that best explains how a light wave behaves when moving from air to water is "it slows down and continues straight." That is the last option, i.e., option D, as light travels more slowly in water.
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Help pleaseeeee fasttt
Which gene mutation would have the greatest impact on a protein's amino acid sequence?
Answer:
heyyy there fellow weeb, thought id help u with this.
Explanation:
The addition of 2 bases is the most severe of these mutations. Because of a triplet reading of the genetic code, a 2 base insect changes the code readings frame that causes a frameshift mutation that means that each amino acid is incorrect after the mutation's site.
why use fingertip to detect braille symbol but not palm of hand
Answer:
the fingertip has more censors and nerves connected to the skin as compared to the palm
List the three layers of the rainforest
Answer:
Canopy, understory, and forest floor.
Explanation:
Hope that this helped you :D
what's the function of PCT and DCT of nephron ?
Answer:
PCT and DCT are the two convoluted parts of a nephron found in the renal cortex. PCT occurs after the Bowman's capsule while DCT occurs after the loop of Henle. PCT is mainly involved in the reabsorption whereas secretion occurs in the DCT.
Aeroplanes can fly ,just like birds.However,they are not considered living organisms .Give 4 reasons
Logging involves people cutting down trees to acquire timber for uses such as building homes and making paper. How would logging affect a pine forest ecosystem? Choose the two that apply.
Answer:
Deforestation
Explanation:
When logging is applied in pine forest the organisms in the ecosystem as to go to extinction
Answer:
It would change the plant populations in the area.
It would change the animal populations in the area.
Explanation:
In the Hershey Chase experiment components of bacteriophages were labeled with radioactive isotopes of sulfur and phosphorus What was
the Hershey-Chase evperiment designed to determine?
Answer:
c
Explanation:
It was designed to determine whether the genetic material of the bacteriophage (a type of virus that infects bacteria) is made of DNA or protein.
What was Hershey-Chase experiment?The Hershey-Chase experiment, also known as the "Blender Experiment," was a classic experiment in molecular biology that was conducted in 1952 by Alfred Hershey and Martha Chase. It was designed to determine whether the genetic material of the bacteriophage (a type of virus that infects bacteria) is made of DNA or protein.
In the experiment, components of the bacteriophage were labeled with radioactive isotopes of sulfur and phosphorus. The labeled phages were then used to infect bacterial cells, and the cells were subjected to various treatments to separate the viral components from the bacterial components.
The results of the experiment showed that the genetic material of the bacteriophage was made of DNA, not protein. This was determined by the fact that the labeled DNA, but not the labeled protein, was able to enter the bacterial cells and infect them. This experiment provided strong evidence for the "central dogma" of molecular biology, which states that genetic information flows from DNA to protein, but not the other way around.
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Explain in-detail the method of blood grouping and why should we do that?
how are diffusion and endocytosis similar?
Which statement best describes the chemical substances secreted by the endocrine glands?
Answer: B if its wrong so be it
Explanation:
please help!! il give brainlist
Answer:
1-they are cats
2-different colors
3-orange.white.and black
Explanation:
Describe at least three ways in which viruses, bacteria, protists, or fungi are important in your daily life.
Answer: hem living in and on your body that are beneficial to you. ... heating it to at least 71.6°C for only 15 s. ... List three ways fungi are important to the environment.
Explanation:
what are the two types of ATP production available in our muscles?
Answer:Muscle cells are able to produce ATP with oxygen, which is called aerobic respiration, or without oxygen, an anaerobic process called anaerobic glycolysis or fermentation. The process in which ATP is made is dependent on the availability of oxygen (see the Cellular Respiration concepts).
Explanation:
Can depletion of the ozone cause a rise in skin cancer among humans? Explain
Please help
Who developed virtually the same theory of evolution?
Select one:
O a. Wallace
O b. Malthus
O c. Lamarck
O d. Lyell
Answer: I’m pretty sure it's Lamarck
Explanation:
I’m sorry if it’s wrong
SI UNA PERSONA AUMENTA LA CANTIDAD DE GRASAS DE ORIGEN ANIMAL EN SU DIETA, EL CONTENIDO DE COLESTEROL EN LA SANGRE TAMBIÉN AUMENTA. POR LO TANTO, EN LAS PAREDES DE LOS VASOS SANGUÍNEOS SE PUEDEN ACUMULAR PLACAS DE GRASA Y COMO CONSECUENCIA
Answer:
Eso es verdad. Como esta tu dia :)
Explanation:
1. Insects Have three pairs of legs or are the ______ arthropods.
4. ______ have two body segments and have no antennae
6. Butterfly is an exxample of an _______
7. This animal is an example of exoskeleton.
8. _____ are invertebrates that people can eat
9. _____ is an example of shellfish.
10. Snail is an examole of _____
pick your answer below
-eight
spiders
worm
snail
shrimp
six legged
antennae
mollusks
insects
shellfish
Answer:
1. Six legged
4. Spiders
7.snails
8. Shrimp
9.Mollusks
10.worm
Explanation:
Insects have three pairs of legs or are the six legged arthropods.
What is a arthropod?
Invertebrates with an exoskeleton, segmented bodies, and paired jointed appendages are known as arthropods. Arthropods are classified as members of the phylum Arthropoda.
They are distinguished by their jointed limbs and cuticle, which is frequently mineralized with calcium carbonate. Arthropods have an external skeleton and are bilaterally symmetrical.
1. Insects have three pairs of legs or are the six-legged arthropods.
4. Spiders have two body segments and have no antennae.
6. Butterfly is an example of an insect.
7. This animal is an example of exoskeleton- Snail
8. Shrimp are invertebrates that people can eat.
9. Mollusks is an example of shellfish.
10. Snail is an example of worm.
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Which level of organization forms the fundamental base for all other levels
in the hierarchy of life? *
Cell
O Tissue
Organ
Organism
Answer:
organ
Explanation:
The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
The biological level of organisation range from organelle to biosphere. Therefore, option (A) cell forms the fundamental base.
What do you mean by hierarchy of life ?Cells join to form tissues in larger animals, which are clusters of similar cells performing similar or related jobs. Organs are groups of tissues that work together to fulfill a certain task. Organs can be found in both plants and animals. An organ system is a more advanced level of organization made up of organs with similar functions.
A population is the aggregate term for all members of a species that are present in a given location. An ecosystem is made up of all the living things that exist in a specific location as well as the abiotic, non-living elements of that environment, such as soil nitrogen or rainwater. The biosphere is a group of organisms that is organized at the highest degree possible.
Thus, option (A) cells forms the fundamental base for all other levels
in the hierarchy of life.
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what is the best explanation scientists have been able to come up with for the appearance of Ostrich-like birds in different continents
Answer: B. The distribution of some groups of ostrich like birds may have been influenced by continental drift in what is known as Pangea.
Explanation:
Answer:
B. The distribution of some groups of Ostrich-like birds may have been influenced by continental drift in what is known as Pangea
Explanation:
The diagram below shows a cell placed in a solution.
A cell is shown placed inside a beaker. It is labeled Cell. The solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.
Only water is allowed to move in and out of the cell. What will most likely happen to the cell?
It will expand as water moves out of it.
It will shrink as water moves out of it.
It will expand as water moves into it.
It will shrink as water moves into it.
Answer:
it will expand as water moves hope this helps!
Explanation:
describe how the skin works when the place is very hot
Answer:
when body temperature rises, such as when exercising on a hot day, the dermal blood vessels will dilate, in the sweat glands begin to secrete more sweat. the invaporation of the sweat from the surface of the skin cools the body by dissipating heat.
Explanation:
Hope this helped Mark BRAINLEST!!!
Answer:
When it is hot, we normally sweat. Sweating removes the heat energy from our skin. Our blood vessels open up which lets more blood flow. This allows a way for the heat to be lost. It lets your body cool down or try and cool down.
What are some things that may cause weathering and erosion?
Choose all that apply:
-Rain
-Rivers
-Wind
-Volcanoes
Answer:
Rain, Rivers , Wind
Write a scientific explanation that explains how oxygen and carbon dioxide travel within the seed and the egg.
Carbon dioxide and oxygen travel within the seed and egg to break the energy or food inside the seed or egg. It comprises schematic steps which are responsible for these functions.
What do you mean by Seed?Seed may be defined as the unit of reproduction of a flowering plant, capable of developing into another such plant.
The oxygen enters the seed and gets absorbed by the seed coat. It makes the seed coat wet and soft due to oxygen absorption. This oxygen now combines with energy that is stored inside the seed. The level of carbon dioxide increases when the process of photosynthesis will be initiated.
Therefore, carbon dioxide and oxygen travel within the seed and egg to break the energy or food inside the seed or egg.
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HELPP PLEASEEEE FASTTTT
Both parents in the example carry the dominant and the
recessive alleles for a trait (heterozygous). What is the
probability of the offspring expressing the recessive
phenotype?
Answer:
25%.................
Answer:
D, 25%
Explanation:
We can do this with simple math! Since we have a 1:4 ratio of possibly expressing the recessive phenotype, we will do 1/4.
1/4 = .25
Then, we will multiply this by 100, which results in 25.
anyone know these please help me out i need a lot of help
Answer:
1. False
2. True
3. True
4. True
Explanation:
1. Not all mutations are bad! Some actually can provide people with advantages.
2. Back to number 1, yes! Some mutations can give you advantages that people would not normally have.
3. Yes! Melanin helps protect our skin from damage from UV rays from the sun. This is why people with lighter skin tend to “tan” or “burn”.
4. Yes! Mutations are often a random process. We cannot determine whether or not someone will be born with or without a mutation.
As the medical examiner performs an autopsy on a body found in a nearby forest, she collects sand from between the victim's toes
that is identical to sand from a beach located 20 miles from the scene. What is the most important reason that this is relevant to
the case?
A)
It suggests that the victim may have drowned.
B)
It suggests that the victim may have taken a recent vacation.
0
It suggests that the crime may have occurred at another site.
D
It suggests that the suspect may have been to the beach recently.
Answer:
It suggests that the crime may have occurred at another site.