At rest, how many times per minute does a human normally breathe?
Correct answer C. 15-20
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Biology MCQs
Page 30 of Biology multiple-choice questions with answers. Tap an option to check yourself.
Page 30 of 75
What name is given to the process in which cells use oxygen and release carbon dioxide?
Correct answer A. Cellular
What is the name of the thin, double-layered membranous sac that surrounds the lungs?
Correct answer D. Pleura
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Which type of respiration directly produces the energy needed for all living activities?
Correct answer A. Cellular
The spongy texture of the lungs comes from the presence of millions of which structures?
Correct answer A. Alveoli
What name is given to the functional units of the lungs?
Correct answer B. Air sacs
Roughly how many kilocalories of energy are released when the terminal phosphate bond of ATP is broken?
Correct answer B. 7.3
During which process are ATP molecules consumed?
Correct answer B. Glycolysis
What kind of process is cellular respiration, essentially?
Correct answer C. Oxidation
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What is the final electron acceptor in the respiratory (electron transport) chain?
Correct answer A. Oxygen
Which pigment is regarded as the most important in photosynthesis?
Correct answer C. Chlorophyll a
The chlorophyll molecule sits in the core of the thylakoid membrane. What is the nature of this core region?
Correct answer A. Hydrophobic
During alcoholic fermentation, pyruvic acid is ultimately converted into which product?
Correct answer A. Ethyl alcohol
A shortage of which element causes plant leaves to turn yellow?
Correct answer A. Magnesium
Which wavelengths of light do chlorophylls mainly absorb?
Correct answer A. Orange – red
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What colour are xanthophyll pigments?
Correct answer C. Yellow
In which membranes of the chloroplast are chlorophyll molecules embedded?
Correct answer B. Thylakoid
At what wavelength do the reaction-centre molecules of Photosystem II absorb light most strongly?
Correct answer A. 680 nm
In plants, where does most photosynthesis take place?
Correct answer A. Leaves
Into what are the thylakoids in chloroplasts stacked?
Correct answer A. Grana