CAM Pathway

Q. The number of equivalent molecules of ATP required to produce one molecule of glucose in $C_4$ plants is ________.

1. 39
2. 12
3. 30
4. 18

Q. Which of the following statements is correct about CAM plants?

1. The stomata remains open throughout day and night
2. The stomata remains open during the day and close during the night
3. The stomata remains closed during the day and open during the night
4. The stomata remains closed throughout day and night

Q. CAM pathway operates in:

1. Drought escaping xerophytes
2. Drought resisting xerophytes
3. Flood enduring xerophytes
4. Ephemerals

Q. In which of the following plants, PEP (phosphoenolpyruvate) is the primary $C{O}_2$ acceptor?

1. $C_4$ plants
2. $C_2$ plants
3. Both $C_3$ and $C_4$ plants
4. $C_3$ plants

Q. Which of the following plants have the RuBisCO enzyme?

1. $C_4$ plants
2. $C_3$ plants
3. CAM plants
4. All of these

Q. Identify the missing compounds:

1. A - Phosphoenolpyruvate,
   B - Fructose-1, 6-phosphate
2. A - Glucose-6-phosphate,
   B - Phosphoglyceric acid
3. A - Dihydroxy acetone phosphate,
   B - 3-phosphoglyceric acid
4. A - Triose phosphate,
   B - Phosphoenolpyruvate

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

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

Q. Which types of plants store malic acid in vacuoles?

1. CAM
2. $C_3$
3. $C_4$
4. $C_2$

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.

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 use PEP carboxylase during daytime and RUBISCO during the night

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

4. CAM plants lack Kranz anatomy

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

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