BIOMOLECULES AND ENZYMES

BIOLOGY

PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many nucleotides in DNA or mRNA code for a specific amino acid?
A
1
B
2
C
3
D
4
Explanation: 

Detailed explanation-1: -Figure 1: In mRNA, three-nucleotide units called codons dictate a particular amino acid.

Detailed explanation-2: -Each codon represents a single amino acid. Therefore, nine nucleotide bases are required to code for three amino acids. Note: A genetic code chart represents different combinations of the four nucleotide bases.

Detailed explanation-3: -A codon is a DNA or RNA sequence of three nucleotides (a trinucleotide) that forms a unit of genomic information encoding a particular amino acid or signaling the termination of protein synthesis (stop signals).

Detailed explanation-4: -A sequence of three consecutive nucleotides in a DNA or RNA molecule that codes for a specific amino acid. Certain codons signal the start or end of translation. These are called start or stop (or termination) codons.

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