brodidit for students
Bioenergetics
Class 9 · Biology · 6 questions
Name: ____________________ Date: ____________
Plants make their food by:
- A Excretion
- B Photosynthesis
- C Respiration
- D Digestion
Which gas do plants take in for photosynthesis?
- A Carbon dioxide
- B Oxygen
- C Hydrogen
- D Nitrogen
Which pigment absorbs light in photosynthesis?
- A Haemoglobin
- B Keratin
- C Chlorophyll
- D Melanin
The energy currency of the cell is:
- A RNA
- B Glucose
- C DNA
- D ATP
Aerobic respiration needs:
- A Only light
- B Only nitrogen
- C No oxygen
- D Oxygen
Anaerobic respiration in yeast produces:
- A Oxygen
- B Water only
- C Lactic acid
- D Ethanol and carbon dioxide
Answer key
1. B, 2. A, 3. C, 4. D, 5. D, 6. D
Photosynthesis uses light energy to make glucose.
Carbon dioxide and water are the raw materials.
Chlorophyll absorbs light energy, mainly red and blue light.
ATP carries energy for cell activities.
Aerobic respiration uses oxygen to break down glucose.
Yeast ferments glucose to ethanol and carbon dioxide.