1) What does oxygen allow humans to do? A) breathe B) produce : 1380750

1) What does oxygen allow humans to do?
A) breathe
B) produce : 1380750.

 

1) What does oxygen allow humans to do?

A) breathe

B) produce food

C) digest food

D) produce ATP from food

 

2) Cells capture the energy from food and store it in the form of:

A) glucose.

B) ATP.

C) oxygen.

D) heat.

E) carbon dioxide.

 

3) Energy is required to link a phosphate group to ADP to make ATP. Where does the energy come from?

A) vitamins

B) enzymes

C) food we eat

D) breathing

 

4) Which of the following is an example of a molecule being oxidized?

A) oxygen being converted into H2O

B) pyruvate being converted into lactic acid

C) FAD being converted into FADH2

D) NADH being converted into NAD+

 

5) During cellular respiration, what molecule collects the majority of the electrons from the food that we eat?

A) CO2

B) FAD+

C) NAD+

D) glucose

E) ATP

6) Oxidation involves the ________ , and reduction involves the

A) gain of oxygen; loss of oxygen

B) loss of oxygen; gain of oxygen

C) loss of electrons; gain of electrons

D) gain of electrons; loss of electrons

 

7) In which of the following reactions is reduction taking place?

A) NAD+ → NADH

B) FADH → FAD+

C) NADH → NAD+

 

8) When NADH donates its electrons to the electron transport chain, which of the following is true?

A) NADH is reduced to NAD+.

B) NADH is oxidized to NADH2.

C) NADH is reduced to NADH2.

D) NADH is oxidized to NAD+.

 

9) The majority of ATP in aerobic respiration is produced by:

A) the Krebs cycle.

B) glycolysis.

C) the electron transport chain.

 

10) Why do biologists believe glycolysis evolved before the Krebs cycle and the electron transport chain?

A) Glycolysis occurs in the mitochondria, which all organisms have.

B) Glycolysis requires oxygen, which was one of the first elements on Earth.

C) All organisms use glycolysis; not all use the Krebs cycle and the electron transport chain.

D) Glycolysis is the most efficient at producing energy.

 

1

 

 

1) What does oxygen allow humans to do?
A) breathe
B) produce : 1380750

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