What composes the backbone, or side pieces, of the DNA molecule?

Biology

1 answer:

Orlov [11]2 years ago

4 0

Answer:

A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.

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How can selective breeding increase biodiversity within a species?

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A woman produces an egg with 24 chromosomes, including 2 copies of chromosome 21. If the egg is fertilized by a normal sperm, th

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Explanation:

We all know that gametes like egg cell and sperm have haploid set of chromosomes but here as per this question she has produced 2 copies of chromosome 21. For the sake of maintaining haploidy, she was supposed to have only a single copy of chromosome 21 as a result of which her egg cell was supposed to have 23 chromosomes not 24.

But, this is a case of non dis-junction. Also, in a normal sperm there are no such copies of any chromosome i.e. there is a haploid set of chromosomes. It means that sperm must be having only 23 chromosomes. So we can easily infer that when the egg cell and sperm will fuse, the zygote will have 47 chromosomes (24 from egg cell and 23 from sperm).

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41) a particular triplet of bases in the template strand of dna is 5' agt 3'. the corresponding codon for the mrna transcribed i

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A particular triplet of bases in the template strand of DNA is 5' agt 3'. the corresponding codon for the mRNA transcribed is<u> 3' UCA 5'</u>

<u></u>

It serves as a link between DNA's genetic code and proteins' amino acid sequences.

The codons in the messenger RNA (mRNA) are complementary to the nucleotide sequence on the DNA template strand.

Then it controls the synthesis of amino acids with the aid of tRNA and ribosomes.

Its name, messenger RNA, refers to the fact that it carries genetic information. The single strands of adenine, cytosine, guanine, and uracil that make up the mRNA molecule are held together by a sugar phosphate backbone.

Two codons: His, Lys, Phe, Tyr, Asn, Asp, Cys, Gln, Glu, Codons Ile, STOP, and three ("nonsense"). Ala, Gly, Pro, Thr, and Val are the four codons. None of the five codons.

Learn more about mRNA:

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