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spin [16.1K]
3 years ago
6

If you were to try and pair a thymine with a cytosine (a non Watson-Crick base pairing), then would you expect to see any stabil

ity with respect to the hydrogen bonding (assuming the geometrical configurations of both bases were favorable to each other)? If yes, then how many hydrogen bonds could form between these two bases?
Biology
1 answer:
Artyom0805 [142]3 years ago
7 0

Answer:

Yes, two hydrogen bonds could form between thymine and cytosine.

Explanation:

Cytosine is a pyrimidine base found in both DNA and RNA, and Thymine is a pyrimidine base found in only DNA. Electronegative Oxygen and Nitrogen atoms with free lone pairs are potential hydrogen bond acceptors. Hydrogen atoms attached to very electronegative atoms like Oxygen and Nitrogen have strong partial positive charge and are potential hydrogen bond donors.

One hydrogen bond could form between the C4 carbonyl group on thymine which is a hydrogen bond acceptor and the C4 amino group on cytosine which is a hydrogen bond donor. Also, another hydrogen bond could be formed between N3 of thymine which is a hydrogen bond donor and the N3 of cytosine that is a hydrogen bond acceptor.

It is important to note that hydrogen bond cannot be formed between them because the C2 carbonyl groups found on both bases are both hydrogen bond acceptors.

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What are two different things you could do to reduce the amount of Carbon Dioxide In the Atmosphere? Plz explain
mylen [45]
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3 years ago
Examples of homozygous recessive?
Vlad1618 [11]

Answer:

Please mark as brainliest....thanks!!!

Explanation:

An organism can be homozygous dominant if it carries two copies of the same dominant allele, or homozygous recessive if it carries two copies of the same recessive allele. Heterozygous means that an organism has two different alleles of a gene.

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Credit:

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8 0
3 years ago
A woman heterozygous for A blood marries a man heterozygous for B blood.
fgiga [73]

Answer:

b) 25% is the right answer

Explanation:

A woman  heterozygous for A blood group with genotype =  Iᵃi

A man  heterozygous for A with genotype =  Iᵇi

so after cross  between Iᵃ i   x  Iᵇ i

                      alleles            man                       woman

                                                                   Iᵃ                 i

                                                Iᵇ                  IᵃIᵇ              Iᵇi

                                                 i                   Iᵃi                 ii

so the offspring will be

                       25 % AB     IᵃIᵇ              25 % A     Iᵃi

                       25 % B     Iᵇi                   25 % O   ii

6 0
3 years ago
The location of the heart is best described by which of the following?
saw5 [17]

Answer:

c

Explanation:

heart is located slightly behind the sternum (chest bone)

7 0
2 years ago
Read 2 more answers
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