AP BIOLOGY

CELL RESPIRATION

GLYCOLYSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The role of NADH is to
A
provide glycolysis with activation energy
B
produce pyruvate
C
act as “energy taxis”
D
split glucose
Explanation: 

Detailed explanation-1: -NADH contributes to oxidation in cell processes like glycolysis to help with the oxidation of glucose. The energy stored in this reduced coenzyme NADH is supplied by the TCA cycle in the process of aerobic cellular respiration and powers the electron transport process in the membranes of mitochondria.

Detailed explanation-2: -The role of NADH in metabolism is to act as an electron carrier, shuttling electrons from glycolysis and the citric acid cycle to the electron transport chain.

Detailed explanation-3: -NADH is the electron donor in this system. It initiates the electron transport chain by donating electrons to NADH dehydrogenase (blue). NADH donates two electrons to NADH dehydrogenase. At the same time, the complex also pumps two protons from the matrix space of the mitochondria into the intermembrane space.

Detailed explanation-4: -Electrons from NADH enter the electron transport chain in complex I, which consists of nearly 40 polypeptide chains (Figure 10.8). These electrons are initially transferred from NADH to flavin mononucleotide and then, through an iron-sulfur carrier, to coenzyme Q-an energy-yielding process with

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