NEET 2020 Revision Quiz: Biomolecules- 01 (22.11.2019)

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Question 1

Study the given statements and select the correct option.
(i) Carbohydrates, proteins, nucleic acids and lipids are primary metabolites.
(ii) Alkaloids, flavonoids, rubber, etc. are secondary metabolites.
(iii) Linoleic, linolenic and palmitic acids are the three essential fatty acids.

• AStatements (i) and (ii) are correct
• BStatements (i) and (iii) are incorrect
• CStatements (i) and (iii) are correct
• DOnly statement (ii) is incorrect

Question 2

Which of the following statements is not correct regarding chitin?

• AIt is a storage polysaccharide.
• BIt is a homopolysaccharide.
• CIt is a constituent of arthropod exoskeleton and fungal cell wall.
• DIt is the second most abundant carbohydrate on earth.

Question 3

Given structural formula is correctly identified along with its related function by which of the following options?

• ACholesterol A component of animal cell membrane
• BLecithin A component of cell membrane
• CTriglyceride An energy source
• DAdenosine A component of nucleic acids

Question 4

Lecithin is a

• Asterol
• Bglycolipid
• Cphospholipid
• Dsphingolipid

Question 5

Which of the following is a nucleoside?

• AAdenylic acid
• BGuanylic acid
• CThymidilic acid
• DCytidine

Question 6

In DNA molecule, the phosphate group is attached to _______carbon of the sugar residue of its own nucleotide and ________ carbon of the sugar residue of the next nucleotide by _____bonds.

• A5’, 3’ phosphodiester
• B5’, 3’, glycosidic
• C3’, 5’, phosphodiester
• D3’, 5’, glycosidic

Question 7

Semi-essential amino acid is

• AAlanine
• BCysteine
• CArginine
• DGlutamate

Question 8

Read the following statements and select the correct option.
Statement 1 :Haemoglobin is an example of quaternary structure of proteins.
Statement 2 :Haemoglobin molecule is composed of four polypeptide chains-two α-chains and two β-chains.

• ABoth statements 1 and 2 are correct.
• BStatement 1 is correct but statement 2 is incorrect.
• CStatement 1 is incorrect but statement 2 is correct.
• DBoth statements 1 and 2 are incorrect.

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