Question

1. Reactions with a positive delta G

A) can occur as part of coupled reaction

B) are exergonic

C) are reactions that can never happen

2. the correct net reaction for respiration is

A) 6CO₂ + 6H₂O + energy (ATP) -> C₆H₁₂O₆+ 6O₂

B) C₆H₁₂O₆ + 6O₂ -> 6CO₂ + 6H₂O

C) C₆H₁₂O₆ + 6O₂ -> 6CO₂ + 6H₂O + energy (ATP)

D) 6CO₂ + 6H₂O -> C₆H₁₂O₆+ 6O₂

D) reactions that do not require activation energy

3. What is the net output of energy rich molecules of complete glycolysis

A) 3 ATP, NADH, FADH₂

B) 4 ATP, 2 NADH

C) 2 ATP, 2 NADH

D) 2 ATP, NADH, FADH₂

4. As part of respiration, pyruvate processing and the citric acid cycle take place in

A) The cytoplasm

B) The matrix of mitochondria

C) The intermembrane space of mitochondria

D) The inner membrane of the mitochondria

5. Without or under limited oxygen, respiration switches to fermentation. In humans this process breaks down glucose to yield

A) 2 ethanol, 2 ATP

B) 2 lactate, 2 ATP

C) 2 ethanol, 29 ATP

D) 2 lactate, 29 ATP

Answer 1

1)positive delta g reactions are non spontaneous and will never take place ie the right asnwer is C)

2)The breakdown of complex food ie carbohydrates inthe presence of oxygen to yield energy carbondioxide and water is respiration.Right answer is C)

3)The net amount of molecule synthesise is 2ATP and 2 moleucles of NADH are being formed because there is utilisation of2 ATP in the initial conversion of glucose to glucose 6 phosphate and fructose to fructose 6 phosphate and there is synthesis of ATP from PEP to pyruvate and 3PGA to 2pGA yields 2 ATP and the reaction is carried out two times for generation of two pyruvate molecules.So the net ATP syntheised is 2ATP.C)

4) In the matrix of mitochondria citric acid cycle and pyruvate processing takes place.After the citric acid cycle the electron transport chain takes place through the complexes B)