AP BIOLOGY

BIOCHEMISTRY

ENZYMES AND METABOLISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How many FADH2 molecules are produced by 1 turn of the Krebs Cycle?
A
1
B
2
C
3
D
4
Explanation: 

Detailed explanation-1: -In one turn of the Krebs cycle, 3 molecules of NADH are produced. For complete oxidation of a glucose molecule, Krebs cycle yields 4 CO2, 6NADH, 2 FADH2 and 2 ATPs.

Detailed explanation-2: -Products and Functions of the Krebs Cycle For one cycle, two molecules of carbon, three molecules of NADH, one molecule of FADH2 and one molecule of ATP or GTP are produced.

Detailed explanation-3: -A total of four CO2, six NADHs, two FADH2, and two ATPs are made through the citric acid cycle. NADH and FADH2 are electron carriers that can produce more ATPs later in aerobic respiration.

Detailed explanation-4: -In the 6th step of Krebs cycle, oxidation of succinate occurs. Succinate undergoes dehydrogenation to form fumarate with the help of a membrane based enzyme succinate dehydrogenase. FADH2 (reduced flavin adenine dinucleotide) is produced in this step.

Detailed explanation-5: -Krebs cycle produces the following: Two molecules of carbon dioxide are given off. One molecule of ATP is formed.

There is 1 question to complete.