Question 1

Which of the following best describes the role of mRNA during protein synthesis?

Accepted Answer

mRNA copies the DNA sequence and directs the synthesis of proteins

Question 2

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

Accepted Answer

mRNA

Question 3

Which of the following statements correctly contrasts DNA and RNA?

Accepted Answer

DNA contains thymine, while RNA contains uracil

Question 4

A mutation changes the DNA sequence from $$	ext{TAC} to$$ $$	ext{TAA}. $$Using the codon table, what is the most likely effect on the resulting protein?

Accepted Answer

Translation will terminate prematurely due to a stop codon

Question 5

Which process occurs in the nucleus and involves the copying of genetic information from DNA to RNA?

Accepted Answer

Transcription

Question 6

What is the function of tRNA during translation?

Accepted Answer

tRNA brings the appropriate amino acid to the ribosome based on the mRNA codon

Question 7

Given the DNA sequence $$	ext{ATG-GAA-TTT}$$, what is the corresponding mRNA sequence after transcription?

Accepted Answer

$$	ext{AUG-GAA-UUU}$$

Question 8

Which of the following best explains why the sequence of amino acids in a protein is important?

Accepted Answer

It determines the protein's structure and function

Question 9

During translation, what is the role of the ribosome?

Accepted Answer

It joins amino acids together to form a polypeptide

Question 10

A patient has a genetic disorder caused by a single base substitution in a gene. Which of the following is the most likely consequence at the protein level?

Accepted Answer

The protein may have a single amino acid change, potentially altering its function

Question 11

Which of the following codons signals the start of translation in eukaryotic cells?

Accepted Answer

$$	ext{AUG}$$

Question 12

If a segment of mRNA reads $$	ext{CCG-AUU-GGC}$$, which sequence of amino acids will be produced according to the codon table?

Accepted Answer

Proline-Isoleucine-Glycine

Question 13

Which of the following best describes the process of RNA splicing?

Accepted Answer

Removal of introns from pre-mRNA to produce mature mRNA

Question 14

A scientist wants to produce a protein with the amino acid sequence Met-Gly-Ser. Which mRNA sequence should she use?

Accepted Answer

$$	ext{AUG-GGA-UCA}$$

Question 15

Which of the following is NOT a function of proteins in the body?

Accepted Answer

Storing genetic information

Question 16

During elongation in translation, what ensures that the correct amino acid is added to the growing polypeptide chain?

Accepted Answer

Complementary base pairing between the mRNA codon and tRNA anticodon

Question 17

Which of the following best explains why a change in the DNA sequence can lead to a nonfunctional protein?

Accepted Answer

It can alter the amino acid sequence, affecting protein folding and function

Question 18

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

Accepted Answer

Transcription → RNA splicing → Translation

Question 19

A cell is unable to produce functional ribosomes. Which step of protein synthesis will be directly affected?

Accepted Answer

Translation

Question 20

Which of the following best describes the relationship between a gene and a protein?

Accepted Answer

A gene is a segment of DNA that codes for a specific sequence of amino acids in a protein

Protein Synthesis: Mechanisms and Applications in Anatomy & Physiology

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