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Vika [28.1K]
4 years ago
14

Watson and Crick's model of DNA replication is called

Biology
1 answer:
alex41 [277]4 years ago
8 0

Answer:

(B) semiconservative.  

Explanation:

According to the model proposed by Watson and Crick, the DNA molecule consists of two polynucleotide chains arranged on a helix around an imaginary axis, rotating to the right (a double helix). That is, the DNA molecule is in the shape of a spiral staircase, in which the "steps" are made up of nucleotide nitrogen bases and the "handrails" are covalently linked phosphate and sugar - so it is said that DNA is shaped like a helical ribbon. Also according to Watson and Crick DNA replication is semi-conservative, because each strand of DNA will give rise to another strand that will be complementary to its nucleotides.

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Giant kelp forest are ocean ecosystems that are found along the California coast. This food chain shows one of the feeding relat
ch4aika [34]

Sea otters are a symbol of the beauty and diversity of marine life that can be found along the California coast.

They're also important to the health and stability of coastal marine ecosystems, hence they're considered critical species.

Sea urchins and other invertebrates that graze on giant kelp provide food for them.

Without sea otters, kelp forests and, with them, a variety of animal species that rely on kelp environments for existence would be destroyed.

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2 years ago
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4 0
3 years ago
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Which of the following is false about the structure of enzymes?
Nutka1998 [239]

Answer:

Number 2 is false

Explanation:

an enzyme cannot do that.

5 0
3 years ago
✨What are some types of ionizing radiation that can cause mutations in the DNA of cells? (Choose all that apply)✨
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Answer:

Below:

Explanation:

✨ultraviolet light✨

✨X-rays✨

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6 0
3 years ago
What is expressed when both alleles for a gene are equally expressed as in human blood type
alexandr402 [8]

As both the genes get equally expressed in the human blood group genes, both the proteins or characters expressed by those genes get prominent in the phenotype of the organism.

<h3><u>Explanation:</u></h3>

In case of human blood type, there are co dominance between the genes coding for A blood group and B blood group. Absence of both of them produce the O blood group and presence of both of them produce the AB blood group.

The gene for A blood group codes for enzyme α-1,3-N-acetylgalactosamine transferase which attaches the N Acetylgalactosamine to surface of RBCs which are actually the A antigens.

The gene for B blood group codes for  α-1,3-galactosyl transferase which attaches galactose to surface of RBCs which are actually B antigens.

Presence of both of these genes make both N Acetylgalactosamine and galactose to be present on RBC membrane. This is why co dominance occurs in case of AB blood group persons.

5 0
4 years ago
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