Question

Q27). Why must plants make oxygen to remain alive?

A) They need to build an oxygen gradient across the thylakoid membrane.

B) They need the oxygen for mitochondrial respiration to take place.

C) They need the electrons liberated by the splitting of water to fuel the electron transport chain in chloroplasts.

D) They need the oxygen to build G3P in the Calvin cycle.

Answer 1

Option B. Plants must make oxygen to remain alive because it is used in respiration and is essential for the production of ATP, the energy source for cellular processes.

Step-by-step explanation:

Because they need oxygen for so many different processes, plants must produce it in order to survive. Plants assemble carbohydrate molecules using carbon dioxide and water during photosynthesis, releasing oxygen as a waste product. The plant uses this oxygen for respiration, combining it with hydrogen to create water. The synthesis of ATP, the energy source for cellular functions, and respiration would both be significantly reduced in the absence of oxygen.