AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many bases on mRNA create a codon.
A
3
B
30
C
3000
D
2
Explanation: 

Detailed explanation-1: -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-2: -In RNA, these bases are often labeled with the letters A, U, C, and G. 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-3: -The mRNA bases are grouped into sets of three, called codons. Each codon has a complementary set of bases, called an anticodon.

Detailed explanation-4: -Three codons, UAA, UAG, and UGA, are known as stop codons as they stop the process of translation. If this is a mutation as a stop codon and its finishes prematurely it is called an amber codon. AUG is also known as a start codon, as it initiates the process of translation.

Detailed explanation-5: -Three codons are needed to specify three amino acids. Codons can be described as messengers that are located on the messenger RNA (mRNA). It is a sequence of three nucleotides that code for one specific amino acid; therefore, every three nucleotides represent one codon.

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