Plant Structure problems
- 1. A cell without cell wall is called
Options- A. apoplast
- B. protoplast
- C. symplast
- D. none of these Discuss
Correct Answer: protoplast
- 2. The mitochondria were known in the nineteenth century to be osmotically active on the basis of evidence that
Options- A. the mitochondrial matrix is hypotonic to the cellular cytoplasm
- B. the mitochondrial matrix is hypertonic to the cellular cytoplasm
- C. mitochondria were derived from a symbiotic bacterium
- D. mitochondria are surrounded by a semi permeable membrane Discuss
Correct Answer: mitochondria are surrounded by a semi permeable membrane
- 3. Which cell type is likely to have the most mitochondria?
Options- A. Fast-twitch muscle
- B. Slow-twitch muscle
- C. Liver cells
- D. Adipose cells Discuss
Correct Answer: Slow-twitch muscle
- 4. Mitochondria can be expected most numerous in
Options- A. green cells
- B. red blood cells
- C. muscle cells
- D. none of these Discuss
Correct Answer: muscle cells
- 5. Why do some redox reactions in cells result in the transfer of electrons from a reductant with a higher standard redox potential to an oxidant with a lower standard redox potential?
Options- A. Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions
- B. The rules governing oxidation and reduction apply only in vitro, and not in vivo
- C. Electrons always go from reductants with high redox potentials to oxidants with low redox potentials
- D. None of the above Discuss
Correct Answer: Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions
- 6. The composition of the inner mitochondrial membrane is most like that of
Options- A. the outer mitochondrial membrane
- B. the cell's plasma membrane
- C. some bacterial plasma membranes
- D. the nuclear membrane Discuss
Correct Answer: some bacterial plasma membranes
- 7. Which of the following functional groups would make a carbon-based compound the least polar?
Options- A. Phosphate
- B. Methyl
- C. Carboxyl
- D. Amino Discuss
Correct Answer: Methyl
- 8. Tonoplast is a membrane around
Options- A. cytoplasm
- B. vacuole
- C. nucleus
- D. mitochondria Discuss
Correct Answer: vacuole
- 9. Chemical energy is supplied to eukaryotic cells by
Options- A. chloroplasts and golgi complexes
- B. mitochondria and ribosomes
- C. mitochondria only
- D. mitochondria and chloroplasts Discuss
Correct Answer: mitochondria and chloroplasts
- 10. Both plant and animal cell possess
Options- A. cell walls
- B. mitochondria
- C. central vacuoles
- D. chloroplast Discuss
Correct Answer: mitochondria
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