Which of the following molecules are involved in both aerobic and anaerobic respiration in a
healthy human?
1 carbon dioxide
2 glucose
3 lactic acid

Answer:

13) B

1 – carbon dioxide is produced as a waste product of aerobic respiration but is not involved in anaerobic respiration. So this is incorrect. 

2 – glucose is produced in both types of respiration. 

3 – lactic acid is produced as a waste product in anaerobic respiration but is not involved in aerobic respiration. 

Hence, only 2 is correct which corresponds to option B.