Question

Identify the correct statement(s) in relation to $C_4$ photosynthesis.
(a) Kranz anatomy is an essential feature for $C_4$ plants.
(b) $C_4$ plants have higher water use efficiency than $C_3$ plants.
(c) Photorespiration is minimised in $C_4$ pathway.
(d) Conversion of oxaloacetate to malate occurs in bundle sheath cells.

• A. a and b
• B. a, b and c
• C. b and c
• D. b, c and d.

Answer 1

The correct option is B a, b and c

A) Kranz anatomy is an essential feature of $C_4$ plants as it enables the Hatch and Slack pathway. So, 'a' is correct. $C_4$ plants have improved leaf and plant water use efficiency. So, 'b' is correct.
B) 'a' and 'b' are correct. Photorespiration is overcome in $C_4$ plants. So, 'c' is correct.

C) 'a' is correct in addition to 'b' and 'c'.
D) 'd' is incorrect as conversion of oxaloacetate to malate occurs in mesophyll cells.

So the correct answer is 'a, b and c'.