EVERYDAY SCIENCE

SCIENCE

RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
During the Krebs cycle, pyruvic acid molecules are broken down to harvest 2 ATPs. What is created and released as a byproduct of that reaction?
A
CO2
B
H2O
C
Neither of these
D
Both of these
Explanation: 

Detailed explanation-1: -This energy is captured in molecules of ATP and electron carriers. The Krebs cycle has two types of energy-carrying electron carriers: NAD+ and FAD. The transfer of electrons to FAD during the Kreb’s Cycle produces a molecule of FADH2. Carbon dioxide is also released as a waste product of these reactions.

Detailed explanation-2: -Steps of the Krebs Cycle After citric acid forms, it goes through a series of reactions that release energy. The energy is captured in molecules of NADH, ATP, and FADH2, another energy-carrying compound. Carbon dioxide is also released as a waste product of these reactions.

Detailed explanation-3: -It takes place inside mitochondria. Krebs cycle produces the following: Two molecules of carbon dioxide are given off. One molecule of ATP is formed.

Detailed explanation-4: -1 molecule of glucose produces 2 molecules of pyruvate. So 1 molecule of pyruvate is responsible for the release of 2 CO2 molecules during 1 Krebs cycle.

Detailed explanation-5: -In the eighth or last step, malate is dehydrogenated so as to form Oxaloacetate. This combines with another molecule of acetyl CoA resulting at the beginning of a new cycle. Thus, one acetyl CoA forms one ATP molecule. Hence, the two will form 2 ATP molecules in one cycle of the Krebs cycle.

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