Test on Plant Carbohydrate and Lipid Metabolism

Question 1: The oxidative reactions of the pentose phosphate pathway produce ATP.

A. Ano

B. Ne

Explanation: The study materials show that the oxidative reactions of the pentose phosphate pathway produce NADPH and CO2, not ATP.

Question 2: Is starch organized into grains that diminish in size by adding layers?

A. Ano

B. Ne

Explanation: The study materials state that starch is organized into grains that grow by adding layers, not diminish in size.

Question 3: Which molecules are directly combined to form Sucrose-6-phosphate during sucrose synthesis?

A. Glucose and Fructose

B. UDP-glucose and Glucose-6-phosphate

C. UDP-glucose and Fructose-6-phosphate

D. Sucrose and ATP

Explanation: The study material shows a diagram for sucrose synthesis where UDP-glucose and Fructose-6-phosphate react to form Sucrose-6-phosphate, catalyzed by Sucrose-6-P Synthase.

Question 4: According to the study materials, what is the primary role of bypass reactions in plant glycolysis?

A. To increase the production of biosynthetic precursors.

B. To provide plants with metabolic flexibility.

C. To directly synthesize starch in plastids.

D. To generate additional ATP beyond the standard glycolytic pathway.

Explanation: The study materials explicitly state under the 'Glycolysis Functions:' section that 'Bypass reactions give plants metabolic flexibility'.

Question 5: Carotenoids, through the xanthophyll cycle, are involved in photoprotection.

A. Ano

B. Ne

Explanation: The study materials specify that carotenoids (xanthophyll cycle) are lipid types involved in the function of photoprotection.