EASY
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In plants, ammonium ions are produced by protonation of ammonia. Which enzyme uses these ammonium ions to convert an alpha-keto acid into an amino acid?

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Important Questions on Biomolecules

MEDIUM
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Select the option which is not correct with respect to enzyme action:
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Which one of the following statements is correct, with reference to enzymes?
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
A non-proteinaceous enzyme is:
HARD
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Match the following:
 
  Element   Activator of
 a.  Fe  (i)  Alcohol dehydrogenase
 b.  Mg  (ii)  Catalase
 c.  Zn  (iii)  Nitrogenase
 d.  Mo  (iv)  Rubisco
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Hydrolysis is a...............reaction and in glycolysis at ............... steps the ATP is hydrolyzed.
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
rRNA acting as enzyme is known as _____ .
MEDIUM
Biology>Cell : Structure and Functions>Biomolecules>Enzymes

Fill in the blank with the correct option provided in the bracket.

Starch is converted into maltose by the enzyme _____(carboxypeptidase/diastase/trypsin).

EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
In prokaryotes, which ribozyme helps in peptide bond formation?
MEDIUM
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Reduction reaction involves the _____ group of enzyme.
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
NAD+ is a _____ of dehydrogenase enzyme
MEDIUM
Biology>Cell : Structure and Functions>Biomolecules>Enzymes

Fill in the blank with the correct answer from the bracket.

_____ inhibition is caused by alteration of confirmation of the enzyme by a chemical that binds to a site other than the active site. (Competitive, Noncompetitive, Reversible) 

MEDIUM
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
The enzyme hexokinase which catalysis glucose to glucose-6-phosphate in glycolysis is inhibited by glucose-6-phosphate. This is an example of

I. Competitive inhibition

II. Non-competitive inhibition

III. Feedback allosteric inhibition

Which of the above statements is/are correct?
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
The enzyme _____ hydrolyses DNA molecules.
MEDIUM
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Slow rate of absorption of ion at high temperature is due to:
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
When the binding of the chemical shuts off enzyme activity, the process is called inhibition and the chemical is called an _____.
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Oxidation reaction involves the _____ group of enzyme.
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
The breakdown of molecules to obtain energy is called _____.
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Dehydrogenases catalyze the _____ reaction with the help coenzyme such as NAD+/NADP+ or flavin such as FAD.
EASY
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
Enzymes linking two molecules by splitting a phosphate bond is _____ .
MEDIUM
Biology>Cell : Structure and Functions>Biomolecules>Enzymes
An organic substance bound to an enzyme and essential for its activity is called _____. (coenzyme/cofactor)