Question

otes, how many ATP's are produced by one molecule of NADH? a. b. 2 c. 3 d. 4 13. n prokaryotes, how many ATP's are produced by one molecule of FA 13. In proka a. 1 b. 2 c. 3 d. 4 е. 5 14. The final electron acceptor in aerobic respiration a. Glucose b. Water c. Oxygen d. Pyruvic Acid 15. The net reaction of aerobic respiration is? a. Glucose + Carbon Dioxide Water+Oxygen b. Glucose Water Carbon Dioxide +Oxygen c. Glucose + Oxygen-Carbon Dioxide + Water d. Carbon Dioxide + Oxygen -> Oxygen + Water 16. The es frament ofhydrogen ions and potential energy of the Electron Transport Chain goes from a... a. Low gradient of hydrogen ions to a high gradient of hydrogen ions; from a low potential energy to a high potential energy High gradient of hydrogen ions to a low gradient of hydrogen ions; from a high potential b. energy to a low potential energy

Answer 1

12. Option c. 3

NADH (reduced form of Nicotinamide adenine dinucleotide) produces 3 molecules of ATP through the electron transport chain (NAD+/ NADH has Standard redox potential Eo = -0.32 V). Hence, the correct answer is option c.

13. Option b. 2.

FADH2 will yield 2 molecules of ATP (Standard redox potential Eo of FAD/ FADH2 = -0.22 V). Hence, the correct answer is Option b.

14. Option c. Oxygen

Oxygen acts as final electron acceptor in aerobic respiration by which it yields more amount of energy. In anaerobic respiration Nitrates, sulphates, Carbon dioxide, Iron acts as electron acceptors

Glucose is used as a carbon source from which aerobic respiration is carried out but it does not act as electron acceptor. Water cannot chemically act as electron acceptor while pyruvic acid is the end product of glycolysis under aerobic conditions but not a electron acceptor. Hence, the answer is Option c. Oxygen

15. Option c. Glucose + oxygen -----> Carbon dioxide + water

(C6H12O6 + 6O2-------> 6CO2 + 6H2O + 36 ATP(for glucose))

Aerobic respiration uses oxygen and occurs in cytoplasm of mitochondria which removes hydrogen atoms from glucose which results in production of carbon dioxide and energy which is represented in the equation given in option c. Hence, option c is the correct answer.

Option a, b and d are not viable reactions as they cannot yield the aforesaid products with mentioned reactants and do not fit into the description of aerobic respiration which requires oxygen.

16. Option b. High gradient of hydrogen ions to a low gradient of hydrogen ions; from a high potential energy to a low potential energy.

Explanation: Hydrogen ions move from concentration gradient in intermembrane space to a low concentration gradient in the mitochondrial matrix with the help of ATP synthase (which utilizes this proton gradient to synthesize ATP) via facilitated diffusion. This does not require free energy as they are moving using concentration gradient. Hence, the answer is option b.

Option a cannot be true as it describes the opposite of the actual case which is not true.