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- Question
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
- Correct Answer
- mitochondria are surrounded by a semi permeable membrane
- 1. A cell without cell wall is called
Options- A. apoplast
- B. protoplast
- C. symplast
- D. none of these Discuss
- 2. Specialized type of peroxisome and the site of glyoxylate pathway in certain plants is known as
Options- A. gly-peroxisome
- B. lysosome
- C. glyoxysome
- D. none of these Discuss
- 3. Which of the following is not an electron carrier class in the electron transport chain?
Options- A. Flavoproteins
- B. Cytochromes
- C. Iron - sulfur proteins
- D. Cytochrome c oxidase Discuss
- 4. What is the source of free energy (?G) for moving protons out of mitochondria against their concentration and electrical gradients?
Options- A. Glycolysis
- B. Creatine phosphate
- C. The redox reactions of electron transport
- D. ATP Discuss
- 5. The cellular organelle associated with secretion is the
Options- A. golgi complex
- B. mitochondrion
- C. ribosome
- D. lysosome Discuss
- 6. 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
- 7. Mitochondria can be expected most numerous in
Options- A. green cells
- B. red blood cells
- C. muscle cells
- D. none of these Discuss
- 8. 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
- 9. 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
- 10. 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
Plant Structure problems
Search Results
Correct Answer: protoplast
Correct Answer: glyoxysome
Correct Answer: Cytochrome c oxidase
Correct Answer: The redox reactions of electron transport
Correct Answer: golgi complex
Correct Answer: Slow-twitch muscle
Correct Answer: muscle cells
Correct Answer: Redox potentials are defined under standard conditions, and cellular conditions are typically not standard conditions
Correct Answer: some bacterial plasma membranes
Correct Answer: Methyl
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