Question

Match the columns I and column II

Column 1	Column 2
Rubisco	Dark reaction
Sucrose	Light reaction
Transpiration	Sucrase
NADPH2	Carboxylation
CO2 fixation	Stomata

Answer 1

A. Rubisco - IV. Carboxylation

1. During dark reaction, ribulose bisphosphate carboxylase fixes 6 molecules of atmospheric carbon dioxide into 1 molecule of glucose in the Calvin-Benson cycle.
2. This process of fixing carbon dioxide is known as carboxylation.

B. Sucrose - III. Sucrase

1. Sucrase mediates the digestion of sucrose which is an oligosaccharide.

C- Transpiration - V. Stomata

1. Stomata are minute pores that are present on the lower surface of the leaves.
2. They play a role exchange of gases, and transpiration.
3. Transpiration is the loss of water from the leaves of plants.

D. NADPH₂ - II. Light reaction

1. When the chlorophyll pigment present on leaves absorbs the light energy received from the sun, it gets excited.
2. The chlorophyll releases energy which is utilized to produce energy molecules such as NADPH₂ and ATP.

E. CO₂ fixation - I. Dark reaction

1. During the dark reaction, leaves absorb 6 molecules of carbon dioxide which is fixed into glucose in the Calvin-Benson cycle.
2. This reaction involving carboxylation of carbon dioxide is aided by rubisco.
3. The dark reaction initiates in the presence of energy molecules such as ATP.

Column I	Column II
A. Rubisco	IV. Carboxylation
B. Sucrose	III. Sucrase
C. Transpiration	V. Stomata
D. NADPH2	II- Light reaction
E. CO2 fixation	I. Dark reaction