+20 Questions on Ribosomes
20 multiple choice questions on Ribosomes, with answers at the end.
Multiple Choice Questions: Ribosomes
1. What is the main function of ribosomes?
A) Energy production
B) Protein synthesis
C) Lipid storage
D) DNA replication
2. Ribosomes are found in:
A) Only animal cells
B) Only plant cells
C) Both prokaryotic and eukaryotic cells
D) Only eukaryotic cells
3. Ribosomes are made up of:
A) DNA and lipids
B) RNA and proteins
C) Carbohydrates and proteins
D) Lipids and carbohydrates
4. Where are ribosomes located in a cell?
A) Only floating freely in the cytoplasm
B) Only attached to the rough endoplasmic reticulum
C) Both free in the cytoplasm and attached to rough ER
D) Only inside the nucleus
5. Ribosomes can be found attached to which cellular structure?
A) Smooth endoplasmic reticulum
B) Rough endoplasmic reticulum
C) Golgi apparatus
D) Mitochondria
6. Which molecule carries the instructions for protein synthesis to ribosomes?
A) DNA
B) mRNA
C) tRNA
D) rRNA
7. Ribosomes translate genetic information from mRNA into:
A) DNA
B) Carbohydrates
C) Proteins
D) Lipids
8. How many subunits does a ribosome have?
A) One
B) Two
C) Three
D) Four
9. Which of the following is NOT a role of ribosomes?
A) Synthesizing proteins
B) Storing genetic information
C) Decoding mRNA
D) Linking amino acids
10. Ribosomes are the site where _____ occurs.
A) DNA replication
B) Photosynthesis
C) Translation
D) Cellular respiration
11. In prokaryotic cells, ribosomes are:
A) Larger than in eukaryotes
B) Smaller than in eukaryotes
C) Absent
D) Located inside the nucleus
12. Which RNA type forms the core of the ribosome’s structure and catalyzes protein synthesis?
A) mRNA
B) tRNA
C) rRNA
D) snRNA
13. The ribosome reads the mRNA in groups of three nucleotides called:
A) Codons
B) Anticodons
C) Genes
D) Exons
14. Ribosomes link amino acids together to form a:
A) Lipid
B) Polysaccharide
C) Protein
D) Nucleotide
15. Which organelle is closely associated with ribosomes for protein processing and transport?
A) Golgi apparatus
B) Mitochondria
C) Rough endoplasmic reticulum
D) Lysosome
16. Ribosomes are synthesized in the:
A) Cytoplasm
B) Nucleolus
C) Golgi apparatus
D) Mitochondria
17. Which of these is NOT a component of ribosomes?
A) Ribosomal RNA
B) Proteins
C) DNA
D) Two subunits
18. Ribosomes attached to the rough ER primarily make proteins for:
A) Export out of the cell or incorporation into membranes
B) Use inside the cytoplasm only
C) Storage in vacuoles
D) Energy production
19. Free ribosomes mainly synthesize proteins that function:
A) Outside the cell
B) In the cytoplasm
C) In the mitochondria
D) In the nucleus
20. The size of ribosomes is measured in:
A) Nanometers
B) Daltons
C) Svedberg units (S)
D) Meters
Answer Key
1. B) Protein synthesis
2. C) Both prokaryotic and eukaryotic cells
3. B) RNA and proteins
4. C) Both free in the cytoplasm and attached to rough ER
5. B) Rough endoplasmic reticulum
6. B) mRNA
7. C) Proteins
8. B) Two
9. B) Storing genetic information
10. C) Translation
11. B) Smaller than in eukaryotes
12. C) rRNA
13. A) Codons
14. C) Protein
15. C) Rough endoplasmic reticulum
16. B) Nucleolus
17. C) DNA
18. A) Export out of the cell or incorporation into membranes
19. B) In the cytoplasm
20. C) Svedberg units (S)
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