Question

1. which of the following is a product of anaerobic respiration in human muscles?

a) oxygen
b) lactic acid
c) glucose
d) carbon dioxide

1. what gas is released during photosynthesis?

a) oxygen
b) carbon dioxide
c) nitrogen
d) methane

1. which of the following statements is true about aerobic respiration?

a) it does not use oxygen
b) it produces less energy than anaerobic respiration
c) it takes place in the mitochondria
d) it only happens in plants

Explanation:

• For question 3: In human muscles, anaerobic respiration converts glucose into lactic acid. Oxygen is used in respiration, not a product. Glucose is the starting - material, and carbon dioxide is a product of aerobic respiration.
• For question 4: Photosynthesis uses carbon dioxide and water to produce glucose and oxygen. Oxygen is released as a by - product.
• For question 5: Aerobic respiration uses oxygen and takes place in the mitochondria of cells (both plant and animal cells), producing more energy than anaerobic respiration.

Answer:

1. B. Lactic acid
2. A. Oxygen
3. C. It takes place in the mitochondria