Question

The DNA segment 3' TACATGGCTCCG 5', transcribes an mRNA. Four tRNAs with anticodons listed below are required for translation.
i) AUG
ii) UAC
iii) CCG
iv) GCU
Choose the correct sequence in which tRNAs would bind to the mRNA

• A. I, II, IV, III
• B. II, I, IV, III
• C. I, II, III, IV
• D. II, I, III, IV

Answer 1

The correct option is B II, I, IV, III

DNA segment, 3' TACATGGCTCCG 5', transcribes one mRNA.

The resulting mRNA would be complementary to the template DNA strand (5' AUGUACCGAGGC 3').

The tRNA molecules that brings the amino acid to the site of protein synthesis, would have anticodons complementary to the mRNA sequence.

Therefore the order of tRNAs would be UAC, AUG, GCU and CCG.