Science Practice Quiz 177

Q1.What is the role of oxygen in the cells during cellular respiration?

A. To transport food B. To help in the breakdown of food C. To produce water D. To excrete waste

Q2.Under what primary condition do human muscle cells respire anaerobically, according to the provided text?

A. When there is an excess supply of oxygen. B. During periods of rest and low energy demand. C. When there is a temporary deficiency of oxygen. D. Only when glucose supply is completely depleted.

Q3.What is the direct cause of muscle cramps after heavy exercise?

A. Excessive intake of water. B. Accumulation of lactic acid due to anaerobic respiration. C. Complete breakdown of glucose into carbon dioxide and water. D. Increased circulation of blood to the muscles.

Q4.How does a hot water bath or massage provide relief from muscle cramps?

A. It directly converts lactic acid into glucose. B. It reduces the overall energy demand of the muscles. C. It improves blood circulation, increasing oxygen supply to muscle cells. D. It causes muscle cells to stop respiring completely.

Q5.Which single-celled organisms respire anaerobically, yield alcohol during this process, and are used to make wine and beer?

A. Bacteria B. Algae C. Yeasts D. Protozoa

Q6.What is the definition of breathing?

A. The process of only taking in air. B. Taking in air rich in oxygen and giving out air rich in carbon dioxide with the help of respiratory organs. C. The complete breakdown of lactic acid into carbon dioxide and water. D. Giving out air rich in oxygen and taking in air rich in carbon dioxide.

Q7.What are the terms for taking in air rich in oxygen and giving out air rich in carbon dioxide, respectively?

A. Exhalation and Inhalation B. Respiration and Breathing C. Inhalation and Exhalation D. Oxidation and Reduction

Q8.Which of the following activities is explicitly mentioned as a scenario where muscle cells might respire anaerobically due to high energy demand?

A. Sleeping peacefully. B. Reading a book quietly. C. Heavy weight lifting. D. Watching television.

Q9.What is defined as the breathing rate according to the provided text?

A. The total volume of air inhaled in a minute B. The number of times a person breathes in a minute C. The duration of one complete inhalation and exhalation cycle D. The amount of oxygen consumed per minute

Q10.What constitutes one complete 'breath'?

A. Only one inhalation B. Only one exhalation C. One inhalation plus one exhalation D. Two inhalations and two exhalations

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Science Practice Quiz 177