Discussion
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- Question
A widely accepted explanation for transport of sugar in phloem is called
Options- A. root pressure theory
- B. transpiration
- C. pressure flow hypothesis
- D. cytoplasmic streaming
- Correct Answer
- pressure flow hypothesis
- 1. Normally CO2 and O2 enter a plant by
Options- A. osmosis
- B. active transport
- C. diffusion
- D. evaporation Discuss
- 2. Which of the following experimental results does not support Mitchell's chemiosmosis theory?
Options- A. Electron transport in isolated mitochondria was shown to result in acidification of the medium
- B. Addition of dinitrophenol to isolated mitochondria was shown to inhibit electron transport, but had no effect on ATP synthesis
- C. Addition of dinitrophenol to isolated mitochondria during electron transport was shown to inhibit acidification of the medium
- D. An artificial proton gradient across the inner mitochondrial membrane drives ATP synthesis in the absence of electron transport Discuss
- 3. Cellular metabolism is an example of
Options- A. equilibrium metabolism
- B. steady-state metabolism
- C. a series of reactions occurring under standard conditions
- D. a series of reactions that defy the second law of thermodynamics Discuss
- 4. In plant cells, which of the following is not a function of the large central vacuoles of plant cells?
Options- A. Storage of food
- B. Support
- C. Contractile regulation of
- D. Waste storage water content Discuss
- 5. Which of the following elements is likely to form the least polar covalent bond with hydrogen?
Options- A. Nitrogen
- B. Oxygen
- C. Carbon
- D. Phosphorus Discuss
- 6. The movement of most minerals, including potassium into root cells is by
Options- A. osmosis
- B. diffusion
- C. bulk flow
- D. active transport Discuss
- 7. Water moves into roots of plants by
Options- A. osmosis
- B. active transport
- C. diffusion
- D. pressure flow mechanism Discuss
- 8. When guard cells swell
Options- A. stomata close
- B. stomata open
- C. photosynthesis stops
- D. evaporation stops Discuss
- 9. The cohesion-tension theory of water movement helps to explain how water moves from soil into root?
Options- A. Through the phloem
- B. From leaf to root
- C. Through the xylem
- D. Into the guard cells Discuss
- 10. The evaporation of water from leaves is called
Options- A. transpiration
- B. cohesion
- C. tension
- D. pressure flow Discuss
Transport of Molecules in Plant problems
Search Results
Correct Answer: diffusion
Correct Answer: Addition of dinitrophenol to isolated mitochondria was shown to inhibit electron transport, but had no effect on ATP synthesis
Correct Answer: steady-state metabolism
Correct Answer: Contractile regulation of
Correct Answer: Carbon
Correct Answer: active transport
Correct Answer: osmosis
Correct Answer: stomata open
Correct Answer: Through the xylem
Correct Answer: transpiration
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