Questions on Translation (Molecular Biology)
Multiple Choice Questions: Translation (Molecular Biology)
1. What is the process of translation in molecular biology?
A) Copying DNA into mRNA
B) Editing RNA after transcription
C) Synthesizing proteins from mRNA
D) Replicating DNA
E) Transporting mRNA out of the nucleus
2. Where does translation occur in a eukaryotic cell?
A) Nucleus
B) Mitochondria
C) Ribosome
D) Golgi apparatus
E) Endoplasmic reticulum only
3. Which molecule is responsible for bringing amino acids to the ribosome?
A) mRNA
B) rRNA
C) tRNA
D) DNA
E) snRNA
4. What is the start codon for translation?
A) UAA
B) UGA
C) AUG
D) GGG
E) UAG
5. Which amino acid is encoded by the start codon AUG?
A) Glycine
B) Alanine
C) Methionine
D) Leucine
E) Serine
6. What type of bond is formed between amino acids during translation?
A) Hydrogen bond
B) Ionic bond
C) Disulfide bond
D) Peptide bond
E) Phosphodiester bond
7. Which part of the ribosome binds to the mRNA first?
A) Large subunit
B) Small subunit
C) Entire ribosome
D) Exit site
E) Peptidyl site
8. What are the three sites on the ribosome used during translation?
A) P, R, T
B) E, P, A
C) X, Y, Z
D) C, G, A
E) R, B, S
9. Which site on the ribosome holds the tRNA carrying the growing polypeptide chain?
A) A site
B) E site
C) P site
D) T site
E) R site
10. Which site on the ribosome is where tRNA exits?
A) A site
B) P site
C) E site
D) G site
E) D site
11. What happens during the elongation phase of translation?
A) The DNA is replicated
B) The ribosome assembles
C) Amino acids are added one by one
D) The mRNA is spliced
E) The RNA polymerase binds
12. What provides the energy for peptide bond formation during translation?
A) DNA polymerase
B) GTP
C) ATP
D) tRNA
E) rRNA
13. Which molecule catalyzes the formation of peptide bonds?
A) DNA polymerase
B) Peptidase
C) Ribosomal RNA (rRNA)
D) mRNA
E) RNA polymerase
14. What marks the end of the translation process?
A) The mRNA is degraded
B) A stop codon is reached
C) The ribosome enters the nucleus
D) DNA replication begins
E) Transcription is reinitiated
15. Which of the following is NOT a stop codon?
A) UAA
B) UAG
C) UGA
D) AUG
E) All are stop codons
16. What happens when a stop codon is encountered?
A) Translation restarts
B) The polypeptide is released
C) The ribosome replicates DNA
D) Transcription begins
E) A new tRNA enters the ribosome
17. Which RNA type is the template for translation?
A) tRNA
B) mRNA
C) rRNA
D) snRNA
E) hnRNA
18. Which of the following is responsible for recognizing the codon on mRNA?
A) rRNA
B) Ribosome
C) DNA
D) Anticodon on tRNA
E) Polymerase
19. What is a polysome?
A) A group of DNA molecules
B) A ribosome that has split
C) Multiple ribosomes translating a single mRNA
D) A chain of amino acids
E) A type of polymerase
20. What is the final product of translation?
A) DNA
B) mRNA
C) Protein (polypeptide)
D) tRNA
E) Lipid
- Questions on the Genetic Code
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Answer Key
1. C
2. C
3. C
4. C
5. C
6. D
7. B
8. B
9. C
10. C
11. C
12. B
13. C
14. B
15. D
16. B
17. B
18. D
19. C
20. C
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