AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many amino acids are coded for by this segment? AUGCCGUGAGGA
A
1
B
6
C
4
D
12
Explanation: 

Detailed explanation-1: -The nucleotide triplet that encodes an amino acid is called a codon. Each group of three nucleotides encodes one amino acid. Since there are 64 combinations of 4 nucleotides taken three at a time and only 20 amino acids, the code is degenerate (more than one codon per amino acid, in most cases).

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. Of these 64 codons, 61 represent amino acids, and the remaining three represent stop signals, which trigger the end of protein synthesis.

Detailed explanation-3: -Answer: Four amino acids can be coded for by this message.

Detailed explanation-4: -Proline (Pro) amino acid is the amino acid which is specified by 4 mRNA codons; CCU, CCC, CCA, CCG.

There is 1 question to complete.