AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the correct codon for the DNA strand:CGA
A
CGA
B
CGT
C
GCU
D
CGU
Explanation: 

Detailed explanation-1: -The CGA codon is one of six arginine‐encoding codons, as shown in the standard genetic code. In Saccharomyces cerevisiae, CGA is a rare codon decoded by arginyl‐tRNAICG, which is biosynthesized by deamination of the wobble position adenine of tRNAACG 1.

Detailed explanation-2: -The codon GCU corresponds to the amino acid alanine. We can also see that the codons GCC, GCA, and GCG also correspond to the amino acid alanine. Four different codons can all code for the same amino acid. The genetic code is redundant, or degenerate, meaning that more than one codon can code for a specific amino acid.

Detailed explanation-3: -Abstract. Alanine is encoded by the four codons of the GC box (GCA, GCG, GCU, and GCC). Known alanine anticodons include the UGC, IGC, and VGC triplets (I = inosine; V = uridine-5-oxyacetic acid).

Detailed explanation-4: -Genetic code CGC codes for arginine, UGU for cysteine and AUG codes for methionine.

There is 1 question to complete.