Class 12 Chemistry · Chapter 11 · Test 2
Proteins and Enzymes
51 MCQs
51 questions · 40 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:
- ALarge complex macromolecules found in all living organisms
- BSmall inorganic ions
- CSimple sugars
- DFatty acids
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Answer: A
Skin and hair and haemoglobin and muscles are all proteins.
Question 2
Complete hydrolysis of proteins gives:
- AGlucose
- BAmino acids
- CFatty acids
- DNucleotides
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Answer: B
Proteins are polymers of amino acids.
Question 3
About how many different amino acids link together in various sequences to create proteins?
- A10
- B15
- C20
- D30
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Answer: C
Twenty amino acids give a wide variety of proteins.
Question 4
A peptide bond is a/an:
- AEster bond
- BIonic bond
- CHydrogen bond
- DAmide bond
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Answer: D
It forms between the -COOH group of one amino acid and the -NH2 group of the next.
Question 5
Long chains of amino acids formed by many peptide linkages are called:
- APolypeptide chains
- BPolysaccharide chains
- CTriglycerides
- DNucleotides
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Answer: A
Each protein has specific polypeptide chains.
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