Biomolecules Biology NEET Questions – Online MCQ Test 01 12

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Biomolecules: MCQs Quiz - 01

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Question 1
The curve given below show enzymatic activity with relation to three conditions (pH, temperature and substrate concentration). What do both axes (x and y) represent?
  x-axis y-axis
(1) Enzymatic activity Temperature
(2) Enzymatic activity pH
(3) Temperature Enzyme Activity
(4) Substrate concentration Enzymatic Activity
A
Option (1)
B
Option (2)
C
Option (3)
D
Option (4)
Question 2
Which one of the following structural formulae of two organic compounds is correctly identified along with its related function?
A
A : Lecithin - a component of cell membrane
B
B : Adenine - a nucleotide that makes up nucleic acids
C
A : Triglyceride - major source of energy
D
B : Uracil - a component of DNA
Question 3
The ‘‘lock and key’’ model of enzyme action illustrates that a particular enzyme molecule
A
May be destroyed and resynthesised several times
B
Interacts with a specific type of substrate molecule
C
Reacts at identical rates under all conditions
D
Forms a permanent enzyme-substrate complex
Question 4
One strand of DNA has the following sequence of nucleotide 3’ ATTCGCTAT 5’ so the other strand of DNA has
A
5’ TAAGCGATA 3’
B
3’ TAAGCGATA 5’
C
5’ GACGCGATA 3’
D
3’ GACGCGATA 5’.
Question 5
With reference to enzymes, which one of the following statements is true?
A
Apoenzyme = Holoenzyme + Coenzyme
B
Holoenzyme = Apoenzyme + Coenzyme
C
Coenzyme = Apoenzyme + Holoenzyme
D
Holoenzyme = Coenzyme – Apoenzyme
Question 6
Feedback inhibition of enzymes is affected by which of the following
A
enzyme
B
substrate
C
end products
D
intermediate end products
Question 7
Example of a typical homopolysaccharide is
A
Lignin
B
Suberin
C
Inulin
D
Starch
Question 8
Which of the following is not a conjugated protein?
A
Peptone
B
Phosphoprotein
C
Lipoprotein
D
Chromoprotein
Question 9
Chitin is a
A
Polysaccharide
B
Nitrogenous polysaccharide
C
Lipoprotein
D
Protein
Question 10
Which one is diaminodicarboxylic amino acid?
A
Cystine
B
Lysine
C
Cysteine
D
Aspartic Acid
Question 11
The effectiveness of an enzyme is affected least by
A
Temperature
B
Concentration of the substrate
C
Original activation energy of the system
D
Concentration of the enzyme
Question 12
Which is an organic compound found in most cells?
A
Glucose
B
Water
C
Sodium chloride
D
Oxygen
Question 13
Enzymes that catalyse inter-conversion of optical, geometrical or positional isomers are
A
Ligases
B
Lyases
C
Hydrolases
D
Isomerases
Question 14
Fluidity of bio-membranes can be shown by
A
Electron microscope
B
Tissue culture
C
Phase-contrast microscope
D
Fluorescence microscope
Question 15
The “Repeating Unit” of glycogen is
A
Fructose
B
Mannose
C
Glucose
D
Galactose
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12 thoughts on “Biomolecules Biology NEET Questions – Online MCQ Test 01”

  • Reply ↓
    kavyasomisetty

    sir, For question 7 Inulin is also a homopolymer of fructose.then, why ans can not be Inulin?could please explain,

    • Reply ↓
      sameer

      If we talk deepley then inulin is a polymer of fructose + sulphuric acid , but normally we say it as polymer of fructose but it is not as complex as compare to starch because in starch many linkages are present like beta 1.,4 so it is a complex homopolysacchride

      #Dr sameer khan
      #Mbbs first year

  • Reply ↓
    subhajit banerjee

    In q-7 why not d ans inulin[fructosan & only b-1,2 gly bond present]?Plz reply sir.