$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$

Question 1

Which process describes the conversion of DNA information into a functional protein?

Accepted Answer

Transcription and translation

Question 2

During transcription, which molecule is synthesized from a DNA template?

Accepted Answer

mRNA

Question 3

What is the role of mRNA in protein synthesis?

Accepted Answer

It provides the template for assembling amino acids in the correct order.

Question 4

A single base change in DNA is called a point mutation. Which of the following is a possible consequence of a point mutation?

Accepted Answer

The protein sequence may change, potentially altering its function.

Question 5

Which of the following best describes the process of translation?

Accepted Answer

Synthesizing proteins from mRNA

Question 6

A mutation changes the DNA sequence from GAG to GTG in the beta-globin gene. What disease is commonly associated with this mutation?

Accepted Answer

Sickle cell anemia

Question 7

If a DNA sequence changes from $	ext{TAC}$ to $	ext{TAT}$, what type of mutation has occurred?

Accepted Answer

Substitution

Question 8

Which of the following is the correct sequence of events for protein synthesis?

Accepted Answer

Replication → Transcription → Translation

Question 9

A single base change in the DNA sequence can result in which of the following effects on the protein?

Accepted Answer

A change in one amino acid, potentially altering protein function

Question 10

Which of the following best explains why a single base change in DNA can have a significant effect on protein function?

Accepted Answer

It can change the codon, resulting in a different amino acid being incorporated into the protein.

Question 11

Which of the following equations represents the central dogma of molecular biology?

Accepted Answer

$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$

Question 12

Which of the following is an example of a missense mutation?

Accepted Answer

A mutation that changes one amino acid in the protein sequence

Question 13

What is the consequence of a nonsense mutation in a gene?

Accepted Answer

A premature stop codon is introduced, resulting in a truncated protein

Question 14

Which of the following best describes the role of tRNA during translation?

Accepted Answer

tRNA brings amino acids to the ribosome and matches them to the mRNA codon.

Question 15

A mutation in the DNA sequence changes the codon $	ext{AAA}$ (lysine) to $	ext{UAA}$ (stop codon). What type of mutation is this?

Accepted Answer

Nonsense mutation

DNA, Protein Synthesis, and Mutations

Study Guide - Practice Questions