QUES 1. The compound which has the lowest density is
Chylomicron
β-Lipoprotein
α-Lipoprotein
pre β-Lipoprotein
QUES 2. Non steroidal anti inflammatory drugs, such as aspirin act by inhibiting the activity of the enzyme:
Lipoxygenase
Phospholipase A2
Cyclooxygenase
Lipoprotein lipase
QUES 3. From arachidonate, synthesis of prostaglandins is catalysed by
Isomerase
Lipoxygenase
Thromboxane synthase
Cyclooxygenase
QUES 4. A Holoenzyme is
Functional unit
Apo enzyme
Coenzyme
All of these
QUES 5. Example of an extracellular enzyme is
Lactate dehydrogenase
Pancreatic lipase
Cytochrome oxidase
Hexokinase
QUES 6. Enzymes, which are produced in inactive form in the living cells, are called
Papain
Lysozymes
Proenzymes
Apoenzymes
QUES 7. An example of ligases is
Succinate thiokinase
Alanine racemase
Fumarase
Aldolase
QUES 8. An example of lyases is
Glutamine synthetase
Cholinesterase
Fumarase
Amylase
QUES 9. Activation or inactivation of certain key regulatory enzymes is accomplished by covalent modification of the amino acid:
Tyrosine
Serine
Lysine
Phenylalanine
QUES 10. Fischer’s ‘lock and key’ model of the enzyme action implies that
The active site is complementary in shape to that of substance
The active site is complementary in shape to that of substance only after interaction.
Substrates change conformation prior to active site interaction
The active site is flexible and adjusts to substrate