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oee [108]
3 years ago
7

What is a nucleotide of DNA

Biology
1 answer:
Fittoniya [83]3 years ago
5 0

Answer:

The nucleotide of DNA is the building block of nucleic acids. It has three parts; phosphate group, nitrogenous base, & a five carbon sugar.

Explanation:

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A portion of an mRNA attached to a ribosome reads: 5 GACCAUUUUUGA 3
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Answer:

a) phenylalanine

Explanation:

A triplet codon results into a particular amino acid. mRNA is read in 5' to 3' direction during translation. tRNA carrying an amino acid enters the A site first. Then a peptide bond is formed between the new and old amino acid. The polypeptide along with the tRNA moves to P site while the now empty old tRNA moves from P to E site and exits. Hence a tRNA is first in A site followed by P site and then finally E site.

Here, a tRNA with histidine amino acid is present in the P site. From the given sequence, only CAU codon can result into histidine. So if CAU region is present in P site that means that UUU will be present in A site. UUU codes for phenylalanine amino acid so the tRNA entering the A site will carry phenylalanine.

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Sources of biological hazards?
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Can someone help me?
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