37. What Is always the first amino acid incorporated at the N-terminus of a grow

Question

37. What Is always the first amino acid incorporated at the N-terminus of a growing polypeptide chain? a. cysteine b. methane c. methionine d. asparagine e. glycine 38. The initiator tRNA enters the 40S ribosomal subunit at theduring eukaryotie protein synthesis. a. A site b. P site c. E site d. Q site e. 43S attachment point 39. The hydrolysis of protein synthesis. is required for each elongation cycle during a, 1, ATP b. 2, ATP c. I, GTP d. 2, GTP e. I, peptide bond 40. In what direction is mRNA produced? (Relative to the mRNA sequence) a. 3' to 5' direction b. S' to 3' direction c. N-terminal to C-terminal direction d. C-terminal to N-terminal direction e. N-terminal to 3' direction 41. In DNA, the designations 3' and 5' refer to a. carbon atoms of deoxyribose to which phosphate groups may bond. b. carbon or nitrogen atoms on the rings of purine and pyrimidine bases. c. cross-linking of the third and fifth carbon atoms of deoxyribose. d. bonding between purines and deoxyribose and between pyrimidines and deoxyribose. e. bonds that form between adenine and thymine and between guanine and cytosine

Explanation / Answer

Ans.37 - (C)

Methionine is the first amino acid incorporated at the N-terminus of a growing polypeptide chain as the start codon i.e., AUG codes for methionine.

Ans.38 - (B)

The inititor tRNA enters the P site whereas other aminoacyl tRNA enter the A site.

Ans. 39 - (D)

The hydrolysis of 2 GTPs is required for each elongation cycle during protein synthesis.

Ans. 40 - (B)

5' to 3' direction

Ans. 41 - (A)

The designations 3' and 5' refer to the carbon atoms of the deoxribose sugar to which phosphate groups may bond.

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.