Question

without access to oxygen gas, the cell cannot directly run the_____________ OF CELLULAR RESPIRATION, AND THUS IT MUST RESORT RELYING ENTIRELY ON THE_________

a) ELECTRON TRANSPORT CHAIN

b) GLYCOLISIS

c) CITRIC ACID CYCLE

d) PREPARATORY STE

Answer 1

Ans) the answer of the first blank is

(a) electron transport chain.

When no oxygen is present, the electron transport chain cannot run because there is no oxygen to act as the final electron acceptor. This means the ETC will not be accepting electrons from NADH as its source of power so NAD+ will not be generated.

The answer for the second blank is

(b) glycolysis,

To be specific, the answer is anaerobic glycolysis. The only alternative to produce ATP in the absence of oxygen is via anaerobic glycolysis where ATP production goes on regardless of the presence or absence of oxygen concentration.