Identify the correct biological process or term for each statement.

Multiple Choice Questions:

1. The chemical digestion of protein begins in the stomach.

   • c. Stomach

2. Photosynthesis produces glucose, which is stored as starch. Starch is tested to confirm photosynthesis.

   • d. Starch

3. The movement of water molecules from a region of higher concentration to a region of lower concentration across a semi-permeable membrane is called osmosis.

   • c. Osmosis

4. Active transport moves substances against their concentration gradient, which requires energy.

   • a. Active transport

5. Saprophytic nutrition involves organisms secreting digestive enzymes externally to break down food before absorption.

   • c. Saprophytic nutrition

6. All living organisms (different species) in a specific locality constitute a community.

   • a. Community

7. Decay, or decomposition by microorganisms, involves respiration which releases carbon dioxide into the atmosphere.

   • c. Decay

8. Benedict's solution tests for reducing sugars. Glucose is a reducing sugar and will produce a brick-red precipitate.

   • d. Glucose solution

9. Boiling a leaf in alcohol removes chlorophyll, which would otherwise mask the color change when testing for starch with iodine.

   • c. Remove chlorophyll

10. Pseudopodia are temporary extensions of the cytoplasm used by amoeba for movement and engulfing food particles, which is part of feeding.

    • d. Feeding

11. The specific place where an organism lives is known as its habitat.

    • d. Habitat

12. A brick red precipitate with Benedict's solution indicates the presence of reducing sugars.

    • a. Reducing sugar

SECTION B: SHORT ANSWER

1. a. What are enzymes?
Enzymes are biological catalysts, typically proteins, that accelerate the rate of specific biochemical reactions without being consumed in the process.

1. b. List 5 characteristics of enzymes?

• Enzymes are biological catalysts.
• They are specific in their action, acting on particular substrates.
• They are primarily proteins.
• They are sensitive to temperature, with optimal activity at certain temperatures and denaturing at high temperatures.
• They are sensitive to pH, functioning best within a narrow pH range.

1. c. Give 3 importance of protein to man?

• Proteins are essential for the growth and repair of body tissues.
• They are crucial for the production of enzymes, hormones, and antibodies.
• Proteins form the structural components of muscles, skin, hair, and nails.

1. d. How would you demonstrate that soaked maize contains reducing sugar?