Which of the following statements regarding enzyme inhibition is correct?
Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein
Non-competitive inhibitors often bind to the enzyme irreversibly
Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme
Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate
The basic building block for all lipids.
Water
Acetyl-CoA
Phosphorus
Nucleic acid
The graph shows the rate of an enzyme reaction at different levels of acidity or alkalinity (pH). From the graph, what is the optimum pH for this enzyme?
pH 2
pH 7
pH 10
pH 8
A protein molecule which is denatured, has :
Split into smaller molecules
Changed its shape
Combined with another molecule
Been diluted
Enzymes, vitamins and hormones can be classified into a single category of biological chemicals. Why?
Because all of these are exclusively synthesized in the body of a living organism as at present
Because all of these enhance oxidative metabolism
Because all of these are conjugated proteins
Because all of these help in regulating metabolism
Carbohydrates, the most abundant biomolecules on earth, are produced by:
Fungi, algae and green plants cells
All bacteria, fungi and algae
Some bacteria, algae and green plant cells
Viruses, fungi and bacteria
Which one of the following amino-acids was not found to be synthesized in Miller's experiment?
Glutamic acid
Aspartic acid
Glycine
Alanine
The most prevalent compound in a living cell is normally:
Protein
Lipid
Assertion: Arachidic acid is an unsaturated fatty acid.
Reason: There are one or more double bonds between carbon atoms in unsaturated fatty acids.
Both Assertion and Reason are true and Reason is the correct explanation of the Assertion
Both Assertion and Reason are true but the Reason is not the correct explanations of Assertion
Assertion is true, but Reason is false
Both Assertion and Reason are false.
Which one of the following is wrong statement?
Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins.
Nitrosomonas and Nitrobacter are chemoautotrophs.
Anabaena and Nostoc are capable of fixing nitrogen in free-living state also.
Root nodule forming nitrogen fixers live as aerobes under free-living conditions.
