A online test of MCQs (Multiple Choice Questions) on “Enzyme“. Quiz No. 3
Enzyme: MCQs Quiz - 3
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The first enzyme to be purified and crystallized was
Beadle and Tatum showed that each kind of mutant bread mould they studied lacked a specific enzyme. Their experiments demonstrated that
Cells need specific enzymes in order to function
Genes are made of DNA
Genes carry information for making proteins
Enzymes are required to repair damaged DNA information
Many enzymes are secreted in inactive form to protect
Most of the members of vitamin B complex act as
Restriction endonuclease is employed for
Cutting single stranded DNA
Cutting double stranded DNA
Joining strands of DNA
Restriction endonucleases are enzymes which
Remove nucleotides from the ends of the DNA molecule
Make cuts at specific positions within the DNA molecule
Recognize a specific nucleotide sequence for binding of DNA ligase
Restrict the action of the enzyme DNA polymerase
RNA without phosphate
RNA with sugar
RNA with enzyme activity
RNA with extra phosphate
The activity of succinate dehydrogenase is inhibited by
The enzyme responsible for the reduction of molecular nitrogen to the level of ammonia in the leguminous root nodule is
all of the above
The non protein part of an enzyme is known as
The polypeptide or protein part of the enzyme is called
Turn over number of an enzyme is dependent upon
Size of enzyme
Molecular weight of enzyme
Concentration of substrate
Which one of the following is resistant to enzyme action?
Which one of the following pairs is wrongly matched?
Textile - amylase
Detergents - lipase
Alcohol - nitrogenase
Fruit juice - pectinase
Which one of the following statements is true with reference to enzymes?
Apoenzyme = Holoenzyme + Coenzyme
Holoenzyme = Apoenzyme + Coenzyme
Coenzyme = Apoenzyme + Holoenzyme
Holoenzyme = Coenzyme – Apoenzyme
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