The pancreas produces digestive secretory granules. After passing through the endoplasmic reticulum, from which surface of the Golgi apparatus are these granules pinched off?
Correct answer A. Maturing face
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Biology MCQs
Page 52 of Biology multiple-choice questions with answers. Tap an option to check yourself.
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60S and 40S subunits combine to form which type of ribosome?
Correct answer A. 80S
Which of the following is not a function of the endoplasmic reticulum?
Correct answer B. Synthesis of conjugated molecules
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What are the flattened or tubular membranes of the endoplasmic reticulum that separate its contents from the cytoplasm called?
Correct answer C. Cisternae
What material strengthens the cell wall of prokaryotes?
Correct answer A. Peptidoglycan or murein
What is the optimum temperature for enzymes in the human body?
Correct answer A. 37°C
A chemical that reacts with an enzyme in place of the substrate, is not turned into product and blocks the active site temporarily or permanently is known as what?
Correct answer A. Inhibitor
What is a substance that binds to an enzyme’s active site but does not lead to product formation called?
Correct answer D. Competitive inhibitor
Which statement about the cell membrane is NOT true?
Correct answer D. It contains charged pores, so ions, being charged particles, cross the cell membrane much more easily than neutral particles
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Inhibitors that block an enzyme by forming weak bonds are called what?
Correct answer B. Both a and b
Compared with the human eye, about how many times does an electron microscope magnify?
Correct answer B. 250,000X
Malonic acid is an example of which type of inhibitor?
Correct answer A. Competitive inhibitor
Which type of inhibitor alters the structure of an enzyme?
Correct answer A. Irreversible inhibitor
In cell fractionation, what determines the layers in which cell components and organelles separate?
Correct answer D. Both their size and weight and the density of the medium
If enzyme concentration is low while substrate, pH and temperature are all at their optimum, what will increase the rate of reaction?
Correct answer D. Increase in concentration of enzyme
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What does an excessive rise in temperature do to an enzyme molecule?
Correct answer C. Denatured
How fine a detail can a compound microscope resolve?
Correct answer D. 2.0 µm
What does an extreme change in pH cause?
Correct answer B. Denaturation of the enzyme
Adding more substrate to an ongoing enzyme reaction has no effect on its rate. What is this condition called?
Correct answer D. Saturation
Where in the cell are ribosomes made?
Correct answer A. Nucleolus