Transport In Plants Test 1 12/11/12

10 Questions | By A_nagvenker | Updated: Mar 21, 2022 | Attempts: 218

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1.

Stomata of a plant open due to:
- A.
  
  Influx of Potassium ions
- B.
  
  Efflux of Potassium ions
- C.
  
  Influx of Phosphorous ions
- D.
  
  Efflux of Phosphorous ions
2.

The translocation of organic solutes in sieve tube members is supported by:
- A.
  
  Cytoplasmic streaming
- B.
  
  Root pressure and transpirational pull
- C.
  
  P-proteins
- D.
  
  Mass flow involving a carrier and ATP
3.
- The continuous column of water in vessel and tracheids during the ascent of sap does not usually get broken because of:
- A.
  
  Weak gravitational pull
- B.
  
  Transpirational pull
- C.
  
  Lignified thick walls
- D.
  
  Cohesion and adhesion
4.

Guard cells help in:
- A.
  
  Transpiration
- B.
  
  Guttation
- C.
  
  Fighting against infection
- D.
  
  Protection against grazing
5.

The guard cells differ from other epidermal cells of the leaf in having:
- A.
  
  Mitochondria
- B.
  
  Lysosomes
- C.
  
  Chloroplasts
- D.
  
  Endoplasmic reticulum
6.

Guttation is the result of:
- A.
  
  Diffusion
- B.
  
  Transpirational pull
- C.
  
  Osmosis
- D.
  
  Root pressure
7.

When beet root cylinders are washed and placed in cold water, anthocyanin does not come out. This indicates that most likely plasma membrane is:
- A.
  
  Permeable to anthocyanin
- B.
  
  Impermeable to anthocyanin
- C.
  
  Differentially permeable to anthocyanin
- D.
  
  Dead structure
8.

If the plant cell is immersed in water, the water continues to enter the cell until the _____
- A.
  
  Concentration of salts is the same inside the cell as outside
- B.
  
  Cell bursts
- C.
  
  Diffusion pressure deficit is the same inside the cell as outside
- D.
  
  Concentration of water is the same inside the cell as outside
9.

Cohesion tension theory operates in _______.
- A.
  
  Passive absorption
- B.
  
  Active absorption
- C.
  
  Both 1 and 2
- D.
  
  None of these
10.

Rate of water absorption can be increased through ______.
- A.
  
  Decreased transpiration
- B.
  
  Decreased ion absorption
- C.
  
  Increased photosynthesis
- D.
  
  Increased transpiration