Science Practice Quiz 52

Q1.Where does the breakdown of pyruvate using oxygen occur in an organism?

A. Cytoplasm B. Nucleus C. Mitochondria D. Cell wall

Q2.What is the primary purpose of the food material taken in during the process of nutrition?

A. To build structural components of the body B. To provide energy for various life processes C. To regulate body temperature D. To store genetic information

Q3.What is added to fruit juice or sugar solution in Activity 5.5 to initiate the fermentation process?

A. Bacteria B. Algae C. Yeast D. Mold

Q4.What is the three-carbon molecule formed from the breakdown of glucose?

A. Ethanol B. Carbon dioxide C. Pyruvate D. Water

Q5.What does Activity 5.4 aim to tell us about the air we breathe out?

A. The amount of oxygen present B. The amount of nitrogen present C. The amount of carbon dioxide present D. The amount of water vapor present

Q6.What are the primary products of the breakdown of a three-carbon pyruvate molecule during aerobic respiration, and under what condition does this process occur?

A. Carbon dioxide and water, in the absence of oxygen. B. Lactic acid and water, in the presence of oxygen. C. Carbon dioxide and water, in the presence of oxygen. D. Ethanol and carbon dioxide, in the absence of oxygen.

Q7.What substance is formed from pyruvate in muscle cells when there is a lack of oxygen, and what condition does its build-up cause?

A. Ethanol, causing fatigue. B. Lactic acid, causing cramps. C. Carbon dioxide, causing muscle weakness. D. Water, causing dehydration.

Q8.How does the energy released in aerobic respiration compare to that in anaerobic respiration?

A. It is significantly less than in anaerobic respiration. B. It is about the same as in anaerobic respiration. C. It is a lot greater than in anaerobic respiration. D. It depends on the organism, sometimes more, sometimes less.

Q9.What is ATP commonly referred to as in the context of most cellular processes?

A. The structural component. B. The waste product. C. The energy currency. D. The genetic material.

Q10.What amount of energy is released when the terminal phosphate linkage in ATP is broken using water?

A. 3.05 kJ/mol B. 30.5 kJ/mol C. 305 kJ/mol D. 3050 kJ/mol

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Science Practice Quiz 52