Question 1

Which site on the ribosome is responsible for binding the incoming charged tRNA during translation?

Accepted Answer

A site

Question 2

During translation, what is the direction in which the ribosome reads the mRNA?

Accepted Answer

5' to 3'

Question 3

What is the function of the anticodon region of tRNA?

Accepted Answer

It pairs with the complementary codon on mRNA

Question 4

Which enzyme is responsible for 'charging' tRNA with its corresponding amino acid?

Accepted Answer

Aminoacyl-tRNA synthetase

Question 5

What is the start codon for translation in most organisms?

Accepted Answer

AUG

Question 6

Which of the following statements about the genetic code is TRUE?

Accepted Answer

The code is non-overlapping and degenerate

Question 7

In prokaryotes, which sequence helps the ribosome recognize the start site for translation?

Accepted Answer

Shine-Dalgarno sequence

Question 8

What is the role of GTP hydrolysis during translation?

Accepted Answer

It provides energy for ribosome translocation and subunit assembly

Question 9

Which ribosomal subunit contains the peptidyl transferase activity?

Accepted Answer

Large subunit

Question 10

A mutation changes a single nucleotide in the coding strand of DNA from A to T. What is the most likely effect on the resulting protein?

Accepted Answer

It could result in a missense, nonsense, or silent mutation depending on the codon

Question 11

Which of the following best explains why there are fewer tRNA types than codons?

Accepted Answer

Wobble base pairing allows one tRNA to recognize multiple codons

Question 12

What is the consequence of a frameshift mutation caused by a single nucleotide insertion in a coding region?

Accepted Answer

The reading frame is disrupted, altering all downstream amino acids

Question 13

Which of the following is NOT a function of the ribosome during translation?

Accepted Answer

Synthesizing mRNA from DNA

Question 14

In eukaryotes, what sequence is most commonly associated with the start codon?

Accepted Answer

Kozak sequence

Question 15

Which of the following codons is a stop codon?

Accepted Answer

UAA

Question 16

What is the effect of the Shine-Dalgarno sequence in bacterial translation?

Accepted Answer

It helps the ribosome bind to the mRNA and locate the start codon

Question 17

Which of the following best describes the relationship between codons and amino acids?

Accepted Answer

Each amino acid can be specified by multiple codons

Question 18

During translation elongation, what happens to the tRNA in the P site after peptide bond formation?

Accepted Answer

It moves to the E site and exits the ribosome

Question 19

Which of the following is TRUE about translation in prokaryotes compared to eukaryotes?

Accepted Answer

Translation and transcription are coupled in prokaryotes

Question 20

A synthetic mRNA consisting entirely of U bases (poly(U)) is translated in vitro. Which polypeptide is produced?

Accepted Answer

A polypeptide of phenylalanine

The Molecular Biology of Translation: From Genetic Code to Protein Synthesis

Study Guide - Practice Questions