Question

X produces a fairly Y amount of ATP. It’s products are carried to the Z to extract more energy.

Which option replaces the letters X,Y,Z to correctly complete the to statements?

Answer 1

Glycolysis produces a low amount of ATP. So, the products of glycolysis is transferred to mitochondria to extract more energy.

So X is glycolysis, Y is low and Z is mitochondria.

Option B.

Step-by-step explanation:

Glycolysis is the first step of respiration and is common step for all kinds of respiration. But the step of glycolysis produces 4 ATPs and uses 2 ATPs. So net gain of ATP is only 2. This is fairly low. So, the products of glycolysis i.e pyruvate is taken to mitochondria to make it participate into Kreb's Cycle. But it needs to be changed to Acetyl CoA by decarboxylation.

In Kreb's Cycle, the product Acetyl CoA is decarboxylated two times to produce 2 molecules of CO2 and various other products like 6NADH and 2 FADH and 2 GTPs. Thus the gain of ATP is huge from Kreb's Cycle.