1. What is the primary role of mitochondria in eukaryotic cells?
a) Photosynthesis
b) Cellular respiration
c) DNA replication
d) Protein synthesis
2. Which cellular process occurs in the presence of mitochondria and generates ATP?
a) Glycolysis
b) Fermentation
c) Photosynthesis
d) Cellular respiration
3. Which organelle divides and replicates through the process of fission?
a) Nucleus
b) Golgi apparatus
c) Mitochondria
d) Lysosome
4. Which part of the mitochondria increases its surface area and contains ATP synthase enzymes?
a) Outer membrane
b) Intermembrane space
c) Inner membrane cristae
d) Mitochondrial matrix
5. What is the main function of porins in the outer membrane of mitochondria?
a) Synthesizing ATP
b) Transporting molecules into the mitochondria
c) Increasing the number of mitochondria
d) Forming cristae in the inner membrane
6. Cells with higher metabolic activity generally have:
a) More Golgi apparatus
b) Fewer mitochondria
c) Larger nucleus
d) More mitochondria
7. The relationship between mitochondria and eukaryotic cells is best described as:
a) Parasitic
b) Symbiotic
c) Competitive
d) Commensal
8. Which cellular component indicates that mitochondria have their own genetic system?
a) Ribosomes (80S)
b) Centrioles
c) Lysosomes
d) Ribosomes (70S)
9. Which compartment of the mitochondria contains a small circular DNA, ribosomes, and enzymes?
a) Intermembrane space
b) Outer membrane
c) Mitochondrial matrix
d) Inner membrane
10. Which process is catalyzed by enzymes in the mitochondrial matrix?
a) Photosynthesis
b) Glycolysis
c) Krebs cycle
d) Fermentation
11. What is the primary function of mitochondria in cellular respiration?
a) Producing glucose
b) Converting carbon dioxide to oxygen
c) Extracting energy from nutrients to produce ATP
d) Breaking down lipids into fatty acids
12. Which structure allows free passage of various molecules into the intermembrane space of mitochondria?
a) Outer membrane
b) Inner membrane
c) Cristae
d) F0-F1 particles
13. Which process increases the number of mitochondria before cell division?
a) Osmosis
b) Endocytosis
c) Fission
d) Diffusion
14. What is the primary function of F0-F1 particles in the inner mitochondrial membrane?
a) Regulating DNA replication
b) Transporting ions across the membrane
c) Catalyzing ATP synthesis
d) Controlling cell division
15. Mitochondria are found in:
a) Prokaryotic cells only
b) Eukaryotic cells only
c) Both prokaryotic and eukaryotic cells
d) Plant cells only
16. Which organelle plays a role in regulating the number of mitochondria in the cell?
a) Endoplasmic reticulum
b) Lysosome
c) Golgi apparatus
d) Nucleus
17. How are mitochondria and chloroplasts similar in structure and function?
a) Both are involved in photosynthesis
b) Both contain DNA and ribosomes
c) Both are found in animal cells only
d) Both have a single membrane structure
18. What is the relationship between mitochondria and lysosomes?
a) Mitochondria produce lysosomes
b) Mitochondria consume lysosomes
c) Lysosomes regulate the number of mitochondria
d) Lysosomes are a type of mitochondria
20. In a fertilized egg, all the mitochondria are derived from the:
a) Mother
b) Father
c) Both mother and father
d) Grandparents
Answers
1. b) Cellular respiration
2. d) Cellular respiration
3. c) Mitochondria
4. c) Inner membrane cristae
5. b) Transporting molecules into the mitochondria
6. d) More mitochondria
7. b) Symbiotic
8. d) Ribosomes (70S)
9. c) Mitochondrial matrix
10. c) Krebs cycle
11. c) Extracting energy from nutrients to produce ATP
12. a) Outer membrane
13. c) Fission
14. c) Catalyzing ATP synthesis
15. b) Eukaryotic cells only
16. b) Lysosome
17. b) Both contain DNA and ribosomes
18. c) Lysosomes regulate the number of mitochondria
19. c) Mitochondrial matrix
20. a) Mother
VACUOLES Biology MCQs | All Important Concept | FSC CLASS 11 & MDCAT
