Question 1

Which of the following best describes the process of transcription in eukaryotic cells?

Accepted Answer

It converts a portion of double-stranded DNA to single-stranded mRNA within the nucleus.

Question 2

During translation, which molecule carries the anticodon that is complementary to the mRNA codon?

Accepted Answer

tRNA

Question 3

A mutation changes the DNA sequence from GAA to GUA. Using the codon table, what effect does this have on the resulting protein?

Accepted Answer

The amino acid changes from Glutamic acid (Glu) to Valine (Val).

Question 4

Which of the following is NOT a function of ribosomal RNA (rRNA) during translation?

Accepted Answer

Carrying amino acids to the ribosome

Question 5

What is the correct sequence of events in protein synthesis?

Accepted Answer

Transcription → mRNA processing → Translation → Protein folding

Question 6

Which of the following statements about introns and exons is correct?

Accepted Answer

Introns are removed from the RNA primary transcript, while exons remain and code for protein.

Question 7

A polypeptide chain is held together by which type of bond?

Accepted Answer

Peptide bonds

Question 8

Which codon serves as the universal start codon for translation?

Accepted Answer

$$AUG$$

Question 9

If the mRNA sequence is 5'-AUG GGC UAA-3', what is the resulting amino acid sequence?

Accepted Answer

Methionine-Glycine

Question 10

Which level of protein structure is primarily determined by the sequence of amino acids?

Accepted Answer

Primary structure

Question 11

A patient has a mutation that causes a single amino acid substitution in hemoglobin, resulting in sickle cell anemia. Which level of protein structure is directly affected by this mutation?

Accepted Answer

Primary structure

Question 12

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

Accepted Answer

It brings specific amino acids to the ribosome based on the mRNA codon.

Question 13

Which of the following is a feature of the tertiary structure of a protein?

Accepted Answer

It is determined by how the protein twists and folds into a 3D shape.

Question 14

Which of the following codons is a stop codon?

Accepted Answer

$$UAA$$

Question 15

What would be the anticodon on tRNA for the mRNA codon $$GCU$$?

Accepted Answer

$$CGA$$

Question 16

Which of the following best explains why several codons can code for the same amino acid?

Accepted Answer

The genetic code is redundant.

Question 17

Which process occurs in the cytoplasm and involves the conversion of mRNA code into a protein?

Accepted Answer

Translation

Question 18

Which of the following is true regarding quaternary protein structure?

Accepted Answer

It involves the association of multiple polypeptide chains.

Question 19

A scientist isolates a molecule that contains both introns and exons. What is this molecule most likely to be?

Accepted Answer

RNA primary transcript

Question 20

Which enzyme is responsible for synthesizing the RNA strand during transcription?

Accepted Answer

RNA polymerase

Protein Synthesis: Transcription, Translation, and Protein Structure

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