Question

Question 6 

During aerobic respiration, which of the following answer choices correctly models the flow of electrons through cellular respiration? 

Select only ONE answer choice. 

 food → citric acid cycle ATP NAD+

 food →NADH → electron transport chain → H2O 

 glucose ATP → electron transport chain → NADH

 food → glycolysis →citric acid cycle → ATP → NADH

Question 7 

At the end of the Citric Acid Cycle, where is most of the energy that was contained in the chemical bonds of glucose? Select only ONE answer choice. 

• In the proton gradient  

• In ATP 

• In CO2 

• In oxidized electron carriers 

• In reduced electron carriers

Question 8 

Researchers were analyzing cellular respiration in humans. They labeled the oxygens in O2 gas with a tag and then allowed respiration to occur in a test tube. Using the diagram below, which letter would likely contain the labeled, tagged O atoms at the END of cellular respiration? Select only ONE answer choice. 

Answer 1

Answer 6)

B is the right answer.

Food> NADH> electron transport chain> water.

Because the food is taken in the cytoplasm of the cell. The food is break down into glucose. The glycose is converted into pyruvic acid by the process of glycolysis. The pyruvate is converted into acetyl co enzyme A. Then it is used in cutric acid cycle. The FADH2 and NADH are produced. These are the reduced electron carrier. These are used in electron transport chain. These electron are taken by oxygen and water is produced.

Answer 7)

in reduced electron carrier.

Explanation;

The FADH2 and NADH are produced in the citric acid cycle. These are the reduced electron carrier and utilise in electron transport chain. Because they are electron donor.

Answer 8)

box A.

Explanation:

Because oxygen is utilised in the electron transport chain. The oxygen takes the electron in electron transport chain. When hydrogen is added in oxygen, then this oxygen is converted into water.

That's why water contains radioactive oxygen.

Answer 2

correct options are:

1. b

2. a