Which enzyme is present in saliva?
Correct answer C. Ptyalin
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Biology MCQs
Page 60 of Biology multiple-choice questions with answers. Tap an option to check yourself.
Page 60 of 75
By what mechanism is ATP synthesised?
Correct answer C. Chemiosmosis
In which group of plants are true roots absent?
Correct answer A. Bryophytes
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Which of these is a parasitic plant?
Correct answer D. Cuscuta
Fungi resemble plants because they lack which structure?
Correct answer A. Centriole
What type of nutrition do fungi show?
Correct answer B. Absorptive heterotrophs
Which pigment is found in red algae?
Correct answer A. Phycoerythrin
Which type of lymphocyte is the main cell infected by HIV?
Correct answer A. Helper T
What are the smallest disease-causing agents in plants?
Correct answer B. Viroids
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Which cell structure is known as the protein factory?
Correct answer D. Ribosome
How many chromosomes does E. coli have?
Correct answer C. 1
Which technique might astronauts use to grow fruit and vegetables in space?
Correct answer C. Hydroponic culture technique
Where is messenger RNA formed?
Correct answer C. Nucleus
From what is a coenzyme often formed?
Correct answer A. Vitamin
What are the four most abundant elements in living cells?
Correct answer C. Carbon, oxygen, hydrogen, nitrogen
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Which of the following organic compounds is found in most cells?
Correct answer D. Glucose
By which process are proteins built from amino acids?
Correct answer C. Dehydration synthesis
In human nerve cells, sodium ions are pumped from a region of lower concentration to one of higher concentration. What is this process an example of?
Correct answer B. Active transport
In osmosis, what normally determines the net movement of water into or out of a cell?
Correct answer B. Concentration of water molecules inside and outside the cell
What are most cell membranes mainly made of?
Correct answer B. Protein and lipids