9th Class Biology Chapter 8 TestBioenergetics

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. Which of the following processes if used by plants to make oxygen during the process of photosynthesis?

   1. Intake of water

   2. Intake of CO₂

   3. Photolysis of water

   4. Calvin cycle

2. Light reactions of photosynthesis occur in;

   1. Plasma membrane of cell

   2. Cytoplasm of cell

   3. Stroma of chloroplasts

   4. Thylakoids of chloroplasts

3. Which molecule donates electrons in the light-dependent reactions of photosynthesis?

   1. NADPH

   2. Water

   3. Oxygen

   4. Carbon dioxide

4. The main pigment of plants is:

   1. Carotenoids

   2. Chlorophyll-b

   3. Chlorophyll-a

   4. All of these

5. Which process in aerobic respiration produces the most ATP?

   1. Glycolysis

   2. Krebs cycle

   3. Electron transport chain

   4. Fermentation

6. Identify the raw meterial of the process of photosynthesis is:

   1. Sun Light

   2. Carbon dioxide

   3. Water

   4. All of these

7. The substances that absorb the visible light called:

   1. Pigments

   2. Resins

   3. Dye

   4. Photocell

8. How many calories are released per mole when a phosphate bond breaks?

   1. 7.2

   2. 7.3

   3. 3.7

   4. 2.7

9. Glycolysis is the breakdown of:

   1. Fructose

   2. Glucose

   3. Lactose

   4. Maltose

10. A child left a carton on the lawn for two days. when the carton was picked up, the grass under it had turned yellow. what caused the grass to change colour?

    1. Lack of oxygen

    2. Lack of carbon dioxide

    3. Lack of light

    4. Lack of water