AP BIOLOGY

LABORATORY REVIEW

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The nucleotide sequence of mRNA codon is composed of how many bases?
A
2
B
3
C
20
D
64
Explanation: 

Detailed explanation-1: -A set of three bases makes up a codon. The messenger RNA contains many such codons, with a series of three bases followed by three more bases, and then three more bases, and so on.

Detailed explanation-2: -The three-letter nature of codons means that the four nucleotides found in mRNA-A, U, G, and C-can produce a total of 64 different combinations.

Detailed explanation-3: -Each group of three bases in mRNA constitutes a codon, and each codon specifies a particular amino acid (hence, it is a triplet code).

Detailed explanation-4: -In mRNA, three-nucleotide units called codons dictate a particular amino acid. For example, AUG codes for the amino acid methionine (beige). In mRNA, three-nucleotide units called codons dictate a particular amino acid.

Detailed explanation-5: -A codon consists of three nucleotide bases. A codon codes for one amino acid. When messenger RNA (mRNA) is read by the ribosome, the ribosome reads it in groups of three nucleotides called a codon. Each codon codes for one amino acid.

There is 1 question to complete.