Question

For a reaction in which the products contain more energy than the reactants, which of the following is true? A. There is a negative change in free energy B. Delta G < 0 C. The reaction requires energy input D. The reaction occurs spontaneously E. The reaction is called exergonic Part 2: Which of the following best describes the process of aerobic respiration? A. The electrons from glucose are donated to ADP transforming it into ATP, which the cells uses for energy. B. Glucose is oxidized, its electrons are used to create a proton gradient which then is used to make ATP C. Glucose is reduced gaining electrons from Oxygen and from ATP D. Oxygen is exchanged with CO2 and it is used to remove the waste products of cellular respiration E. Krebs cycle produces the large bulk of the ATP during aeropic respiration using substrate-level phosphorylation

Answer 1

1. For a reaction in which the products contain more energy than the reactants, which of the following is true?

Answer is- C. The reaction requires energy input.

At first comming to delta G, it is simply the amount of energy that can be converted to work.

So negative delta G indicates that the reactants have more energy then the products and the reaction is exergonic. It dose not require energy input.

And positive delta G indicates products contain more energy than the reactants and the reaction is endergonic. That means it requires energy input.

2. Which of the following best describes the process of aerobic respiration?

Answer is- B. Glucose is oxidized, its electrons are used to create a proton gradient which then is used to make ATP.

In aerobic respiration glucose oxidation takes place through glycolysis, pyruvate oxidation, krebs cycle and oxidative phosphorylation. Finally the generated electrons ( in the form of NADH and FADH2) are used to create proton gradient in mitochondria.This proton gradient is utilized to make ATP from ADP by ATP synthase.