Answers:

1. C
2. C
3. C
4. C
5. C
6. C
7. C
8. B
9. B
10. C
11. B
12. B
13. C
14. C
15. C
16. B
17. C
18. B
19. A
20. B

Answers:

1. d
2. b
3. d
4. b
5. b
6. a
7. a
8. a
9. a
10. c
11. c
12. a
13. a
14. d
15. d
16. d
17. d
18. a
19. b
20. b

▎Answers

1. b) Absorb sunlight

2. c) Leaves

3. a) Oxygen and glucose

4. c) Carbon dioxide

5. c) To exchange gases

6. c) Roots

7. c) Sexual reproduction

8. b) Stamen

9. b) Transport water and minerals

10. b) Pollination

11. b) Transport food (sugars)

12. b) Chlorophyll

13. a) Transpiration

14. a) Starch

15. b) Asexual reproduction

Answers:

1. a
2. c
3. b
4. c
5. c
6. b
7. a
8. c
9. b
10. c
11. b
12. c
13. d
14. c
15. c

               ✅Answer

1. What is the primary function of the light-dependent reactions in photosynthesis?
a) Generation of ATP and NADPH

2. Where do the light-dependent reactions take place in a plant cell?
b) Thylakoid membrane

3. Which molecule is split during the light-dependent reactions to release oxygen?
a) Water

4. What is the role of photosystem II in the light-dependent reactions?
c) Splitting water molecules

5. Which molecule acts as an electron carrier in the light-dependent reactions?
a) NADP+

6. What is the primary product of the light-independent reactions (Calvin cycle)?
b) Glucose

7. In which part of the chloroplast does the Calvin cycle occur?
b) Stroma

8. What is the role of rubisco in the Calvin cycle?
b) Fixation of carbon dioxide

9. How many molecules of G3P (glyceraldehyde-3-phosphate) are produced in one turn of the Calvin cycle?
a) 1

10. What is the fate of most of the G3P molecules produced in the Calvin cycle?
a) Used to regenerate RuBP

11.?
12.?
13.?
14.?
15.?

Answer

1. b) Amylase - Salivary amylase begins the breakdown of carbohydrates in the mouth.

2. c) Neutral (pH 7) - Salivary amylase works best in a neutral pH environment.

3. c) Pepsin - Pepsin, produced in the stomach, breaks down proteins.

4. b) Activates pepsin - Hydrochloric acid (HCl) is crucial for activating pepsin, the main protein-digesting enzyme in the stomach.

5. a) Highly acidic (pH 1-2) - Pepsin functions optimally in the highly acidic environment of the stomach.

6. a) Amylase - Pancreatic amylase continues the breakdown of carbohydrates that started in the mouth.

7. b) Lipase - Pancreatic lipase is the primary enzyme responsible for breaking down fats in the small intestine.

8. d) Trypsin - Pancreatic trypsin is a key protein-digesting enzyme that works in the small intestine.

9. a) Duodenum - The duodenum, the first part of the small intestine, is where most digestive enzymes from the pancreas are released.

10. a) Breaks down fats into smaller droplets - Bile, produced in the liver, emulsifies fats, breaking them into smaller droplets, increasing their surface area for lipase to work on.

11. b) No, the large intestine primarily absorbs water and electrolytes - The large intestine doesn't produce significant digestive enzymes.

12. d) Absorption of water and electrolytes - The main function of the large intestine is to absorb water and electrolytes, forming solid waste.