What kind of process is cellular respiration, essentially?
Correct answer C. Oxidation
Subject / 1,067 questions
MDCAT Biology MCQs
Page 29 of MDCAT Biology multiple-choice questions with answers. Tap an option to check yourself.
Page 29 of 54
- Biological Molecules 74
- Coordination and Control 72
- Biology Diagnostic 70
- Cell Structure and Function 67
- Biotechnology 65
- Reproduction 58
- Bioenergetics 55
- Circulation 50
- Inheritance 48
- Digestion 45
- Immunity 45
- Support and Movement 45
- Acellular Life (Viruses) 45
- Homeostasis 45
- Respiration and Gaseous Exchange 45
- Evolution 45
- Enzymes 45
- Cell Cycle 41
- Chromosome and DNA 40
- Biology Introduction 38
- Ecosystem 27
What is the final electron acceptor in the respiratory (electron transport) chain?
Correct answer A. Oxygen
The chlorophyll molecule sits in the core of the thylakoid membrane. What is the nature of this core region?
Correct answer A. Hydrophobic
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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
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
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Into what are the thylakoids in chloroplasts stacked?
Correct answer A. Grana
What does NADPH2 provide?
Correct answer D. All of these
Where do the light reactions of photosynthesis take place?
Correct answer B. Grana
Which substance is reduced in photosynthesis?
Correct answer A. CO2
What proportion of the leaf surface do stomata cover?
Correct answer B. 1-2 %
What share of total photosynthesis is carried out by land plants?
Correct answer C. 10%
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Which colour of light causes the greatest food production in green plants?
Correct answer D. Red
Which organism was used to obtain the first action spectrum?
Correct answer B. Spirogyra
Who obtained the first action spectrum?
Correct answer B. T. W. Engelmann
At what wavelength does the chlorophyll a molecule of photosystem I absorb light most strongly?
Correct answer C. 700
What percentage of the air is carbon dioxide?
Correct answer B. 0.03-0.04