Q: Which enzyme is responsible for attaching the correct amino acid to its corresponding tRNA during translation, and what energy molecule is required for this process?

Aminoacyl-tRNA synthetase; $$\text{ATP}$$

Question 1

Which enzyme is responsible for attaching the correct amino acid to its corresponding tRNA during translation, and what energy molecule is required for this process?

Accepted Answer

Aminoacyl-tRNA synthetase; $$	ext{ATP}$$

Question 2

During translation, which ribosomal site holds the tRNA carrying the growing polypeptide chain?

Accepted Answer

P site

Question 3

What is the significance of the 'wobble' base pairing in translation?

Accepted Answer

It allows tRNA molecules to recognize multiple codons, increasing translation efficiency.

Question 4

Which of the following best describes the direction in which translation proceeds along the mRNA?

Accepted Answer

$$5' \rightarrow 3'$$

Question 5

A patient is given an antibiotic that specifically targets bacterial ribosomes. Why does this drug not harm human cells?

Accepted Answer

Human ribosomes are structurally different from bacterial ribosomes.

Question 6

Which amino acid is always the first to be added to a newly forming polypeptide chain in eukaryotes?

Accepted Answer

Methionine

Question 7

What is the function of the release factor during translation termination?

Accepted Answer

It triggers the addition of a water molecule, hydrolyzing the bond between the polypeptide and tRNA.

Question 8

Which ribosomal site is responsible for accepting the tRNA carrying the next amino acid to be added to the chain?

Accepted Answer

A site

Question 9

If a mutation changes the anticodon of a tRNA, which of the following is most likely to occur?

Accepted Answer

The tRNA may bind to a different codon, potentially causing incorrect amino acid incorporation.

Question 10

Which of the following steps in translation requires energy in the form of GTP?

Accepted Answer

Codon recognition and translocation

Question 11

A scientist observes a tRNA molecule with an attached amino acid and an anticodon complementary to the mRNA codon. What is this molecule called?

Accepted Answer

Aminoacyl-tRNA (charged tRNA)

Question 12

Which of the following is NOT directly involved in the process of translation?

Accepted Answer

DNA

Question 13

During translation elongation, what happens immediately after a peptide bond is formed?

Accepted Answer

The ribosome shifts, moving tRNAs to the next sites (translocation).

Question 14

Which of the following best describes the structure of tRNA?

Accepted Answer

Single-stranded RNA folded into an L-shaped three-dimensional structure

Question 15

A mutation prevents the formation of the large ribosomal subunit. What is the most immediate effect on translation?

Accepted Answer

Initiation cannot be completed, so translation does not proceed.

Question 16

Which of the following accurately describes the function of the E site in the ribosome?

Accepted Answer

It is the site where discharged tRNAs exit the ribosome.

Question 17

Which of the following is a multi-step process that occurs during translation elongation?

Accepted Answer

Codon recognition, peptide bond formation, and translocation

Question 18

If a stop codon appears in the A site of the ribosome, what is the next event in translation?

Accepted Answer

A release factor enters the A site, triggering termination.

Question 19

Which of the following statements about tRNA is correct?

Accepted Answer

Each tRNA carries a specific amino acid and has an anticodon complementary to a specific mRNA codon.

Question 20

Which of the following accurately describes the role of initiation factors in translation?

Accepted Answer

They assist in assembling the translation initiation complex by bringing together the ribosomal subunits, mRNA, and initiator tRNA.

Translation: The RNA-Directed Synthesis of ProteinsnPart2

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