Photosynthesis in Higher Plants- Quiz 6

The most crucial step of the calvin cycle is

• Decarboxylation

• Carboxylation

• Reduction

• Regeneration

Which one of the following statement is incorrect for carboxylating enzyme in C3 plants?

• Bifunctional nature

• Can bind with CO₂ only

• Its old name was carboxydismutase

• Located in stroma or matrix of chloroplasts

Regeneration of each RuBP in C₃ cycle requires

• 1 ATP

• 6 ATP

• 1 ATP and 1 NADPH + H⁺

• 3 ATP and 2 NADPH + H⁺

Double carboxylation with spatial difference is characteristic of

• Triticum

• Pisum

• Saccharum

• Bryophyllum

Primary carboxylating enzyme in C₄ plant is found in

• Chloroplast of mesophyll cells

• Cytoplasm of mesophyll cells

• Chloroplast of bundle sheath cells

• Cytoplasm of bundle sheath cells

How many additional ATP are used during synthesis of two molecules of hexose sugar in maize than tomato?

• 12

• 36

• 24

• 8

The primary CO₂ acceptor molecule during the C₃ cycle is a

• Ketose sugar

• 5 C compund

• PEP

• Both (a) and (b)

In C₂ (photorespiration) cycle, RUBISCO utilizes:

• CO₂

• O₂

• NADPH₂

• Inorganic phosphate

The above diagram represents the 3 stages of Calvin cycle.

Identify A, B, C :

• A - Carboxylation; B - Reduction; C - Regeneration

• A - Regeneration; B - Reduction; C - Carboxylation

• A - Reduction; B - Carboxylation; C - Regeneration

• A - Carboxylation; B - Regeneration; C - Reduction

In Hatch and Slack pathway, the primary CO₂ acceptor is

• Rubisco

• Oxaloacetic acid

• Phosphoglyceric acid

• Phosphoenol pyruvate