Class 11 Biology · Chapter 4 · Test 2
Biological Molecules Part 2
50 MCQs This set covers proteins, amino acids, protein structure and classification, and the roles of proteins in the body. It also covers lipids, nucleic acids, DNA and RNA, the central dogma and conjugated molecules.
51 questions · 35 min · 51 marks
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Sample questions
The first 5 of 51. Try each one, then tap to see the answer.
Question 1
Proteins are polymers of
- ANucleotides
- BAmino acids
- CFatty acids
- DMonosaccharides
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Answer: B
Proteins are the principal compounds of cells.
Question 2
Who coined the term protein?
- ABerzelius
- BWatson
- CCrick
- DFischer
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Answer: A
Greek proteios means of the first rank.
Question 3
How many amino acids does insulin have?
- A21
- B30
- C51
- D574
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Answer: C
Haemoglobin has 574 amino acids.
Question 4
Which group is NOT attached to the alpha carbon of an amino acid?
- AAmino group
- BCarboxyl group
- CPhosphate group
- DR group
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Answer: C
Four groups are attached: NH2 and COOH and H and R.
Question 5
Most proteins are made of how many types of amino acids?
- A10
- B20
- C25
- D170
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Answer: B
About 170 types occur in nature and about 25 take part in proteins.
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