Agronomy Crop Physiology

Question 1

What is the primary pigment responsible for capturing light energy during photosynthesis?

Accepted Answer

Chlorophyll a

Answer

Carotenoid

Answer

Phycocyanin

Answer

Anthocyanin

Question 2

Which process describes the loss of water vapor from plant leaves primarily through stomata?

Accepted Answer

Transpiration

Answer

Guttation

Answer

Osmosis

Answer

Imbibition

Question 3

What is photorespiration in crop plants?

Accepted Answer

A wasteful process where RuBisCO fixes O2 instead of CO2

Answer

Photosynthesis that occurs during respiration

Answer

Light-dependent ATP production in mitochondria

Answer

Cellular respiration that is accelerated by light

Question 4

Which photosynthetic pathway do corn (maize) and sugarcane use to efficiently fix carbon in hot climates?

Accepted Answer

C4 pathway

Answer

C3 pathway

Answer

CAM pathway

Answer

C2 pathway

Question 5

Which plant hormone is the primary driver of fruit ripening and is produced as a gas?

Accepted Answer

Ethylene

Answer

Cytokinin

Answer

Gibberellin

Answer

Auxin

Question 6

What does the Calvin Cycle (light-independent reactions) primarily produce?

Accepted Answer

Glyceraldehyde-3-phosphate (G3P)

Answer

ATP

Answer

NADPH

Answer

Oxygen

Question 7

What is the net ATP yield per glucose molecule during complete aerobic cellular respiration?

Accepted Answer

36–38 ATP

Answer

2 ATP

Answer

8 ATP

Answer

20 ATP