Difference between C3, C4 and CAM cycle

Q. $C_4$ plants are more efficient in photosynthesis than $C_3$ plants due to:

1. Higher leaf area
2. Presence of large number of chloroplasts in the leaf cells
3. Presence of thin cuticle
4. Lower rate of photorespiration

Q. How does CAM photosynthesis differ from C3 or C4

1. CAM photosynthesis extracts carbon from organic compounds
2. CAM plants must use large quantity of water for photosynthesis
3. CAM photosynthesis continues at night while C3 and C4 photosynthesis occur during the day
4. Malic acid is formed at night, stored in vacuoles in cells housing chloroplasts

Q. $C_4$- plants differ from $C_3$-plants in respect to

1. Number of $C{O}_2$ molecules used
2. Substrate, which accept the $C{O}_2$ molecules
3. The final product
4. Number of ATP formed

Q. As compared to a C3-plant, how many additional moleules of ATP are needed for net production of one molecule of hexose sugar by C4-plants:

1. Six
2. Zero
3. Two
4. Twelve

Q. C₄ plants are more efficient in photosynthesis than C₃ plants due to

1. Lower rate of photorespiration
2. Presence of larger number of chloroplasts
3. Presence of cuticle
4. Higher leaf area

Q. A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?

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

Q. With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

1. Increasing atmospheric $C{O}_2$ concentration upto $0.05$% can enhance $C{O}_2$ fixation rate
2. $C_3$ plants respond to higher temperatures with enhanced photosynthesis while $C_4$ plants have much lower temperature optimum
3. Tomato is a greenhouse crop which can be grown in $C{O}_2$ - enriched atmosphere for higher yield
4. Light saturation for $C{O}_2$ fixation occurs at $10\%$ of full sunlight

Q. A process that makes important difference between $C_3$ and $C_4$ plants is

1. Photosynthesis
2. Photorespiration
3. Transpiration
4. Glycolysis

Q. Select the option that gives the same total as $9+8$.

1. $9+9$
2. $7+9$
3. $8+9$
4. $7+8$

Q. ____ $+7$ will give the same total as $7+5$.

1. $7$
2. $6$
3. $4$
4. $5$