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Biology
Biomolecules
107 questions from 35 papers, each with its answer.
- 107 questions
- 35 papers
- 3.03% of Biology
Classification and Nomenclature of Enzymes
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Name the class of enzyme that usually catalyze the following reaction:
$S - G + S' \rightarrow S + S' - G$
Where, $G \rightarrow$ a group other than hydrogen, $S \rightarrow$ a substrate, $S' \rightarrow$ another substrateEnzymes that transfer a chemical group from one substrate to another are transferases.
Enzymes catalyzing a transfer of a group, G (other than hydrogen) between a pair of substrate S and S' belong to Class 2: Transferases.
Cofactors and Prosthetic Groups
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Which one of the following enzymes contains 'Haem' as the prosthetic group?
Catalase and peroxidase contain haem as their prosthetic group.
In peroxidase and catalase enzymes (which break down toxic hydrogen peroxide into water and oxygen), haem acts as the tightly bound non-protein prosthetic group.
Nature of Enzyme Action and Cofactors
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The protein portion of an enzyme is called:
The protein component of a conjugated holoenzyme is the apoenzyme.
A holoenzyme consists of a protein part called the apoenzyme combined with a non-protein cofactor (which may be a prosthetic group, coenzyme, or metal ion).
Nucleotides and Amino Acids
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Match List-I with List-II.
Pick the matching item from Column II for each row.
Column I
- A. Adenosine
- B. Adenylic acid
- C. Adenine
- D. Alanine
Column II
- I. Nitrogen base
- II. Nucleotide
- III. Nucleoside
- IV. Amino acid
Correct answer: A → III, B → II, C → I, D → IV
A-III, B-II, C-I, D-IV.
Adenosine is a nucleoside (adenine + ribose) (III). Adenylic acid is a nucleotide (adenosine monophosphate) (II). Adenine is a purine nitrogen base (I). Alanine is an amino acid (IV).
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