CAM Pathway

Q.

Which of the following is mismatched?

1. Photosystem I - uses the P700 molecule in its photocentre

2. CAM plants - open their stomata during the day and close them at night to avoid photorespiration

3. PGA - a 3-carbon compound

4. antenna complex - contains hundreds of pigment molecules

Q.

Identify incorrect statement about CAM Plants

1. CAM plants show scotoactive type of ofomata

2. CAM plants show CO₂ fixation in two kinds of cells

3. CO₂ is fixed during night and glucose is made during day

4. CO₂ fixation and calvin cycle are separated by time

Q. Select the wrongly matched pair with regard to $C_4$ - cycle.

1. Site of initial carboxylation-Mesophyll cells
2. Primary $C{O}_2$ acceptor- PEP
3. $C_4$-plant-Maize
4. Primary $C{O}_2$ fixation-PGA product
5. Location of enzyme RuBisCO-Bundle sheath cells

Q. The first stable product in CAM/C4 plants is

1. Sugar
2. Malic acid.
3. Starch
4. Oxaloacetic acid

Q.

In CAM-plants, carbon dioxide required for photosynthesis enters the plant body during

1. Day time throught the lenticels

2. Night, through the open stomata

3. Day time through open stomata

4. Night when the hydathodes are open

Q. In a CAM-plant, the concentration of organic acid

1. Decreases or increases during the day
2. Decreases during any time
3. Increases during night
4. Increases during the day

Q. Stomata of CAM plants:

1. Are always open
2. Open during the day and close at night
3. Open during the night and close during the day
4. Never open

Q.

Which of the following is NOT a character of plants having CAM (Crassulacean Acid Metabolism) cycle?

1. CAM plants are mostly succulents living in xerophytic conditions

2. CAM plants lack Kranz anatomy

3. CAM plants use PEP carboxylase during daytime and RUBISCO during the night

4. In CAM plants, stomata open during the night and close during daytime

Q.

In the following question, a statement of assertion is following by a statement of reason. Mark the correct choice as:
Assertion: CAM plants lack structural compartmentation of a leaf as found in $C_4$ plants.
Reason: Stomata of CAM plants are open during the day.

1. If both assertion and reason are true and reason is the correct explanation of assertion.

2. If both assertion and reason are true but reason is not the correct explantion are true but reason.

3. If both assertion and reason are false

4. If assertion is true but reason is false.

Q. Which of the following is a CAM plant?

1. Sugarcane
2. Cactus
3. Sorghum
4. Maize