Q. No.
An enzyme brings about:
(1) Decrease in reaction time
(2) Increase in reaction time
(3) Increase in activation energy
(4) Reduction in activation energy
The backbone of a DNA molecule is formed by:
(1) nitrogenous bases
(2) deoxyribose sugar
(3) phosphate groups
(4) alternate sugar and phosphate moieties
A glycosidic bond connects:
(1) two monosaccharides
(2) two amino acids
(3) two fatty acids
(4) a fatty acid and a glycerol
The inhibition of succinic dehydrogenase by malonate is an example of:
(1) Non-competitive reversible inhibition
(2) Non-competitive irreversible inhibition
(3) Competitive inhibition
(4) Allosteric inhibition
The enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds are called as:
(1) Oxidoreductases
(2) Hydrolases
(3) Ligases
(4) Lyases
The following diagram depicts the structure of a:
1. Nucleoside
2. Nucleotide
3. Nitrogen containing Monosaccharide
4. Glycoprotein
Which of the following is the simplest amino acid -
1. Alanine
2. Asparagine
3. Glycine
4. Tyrosine
Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by -
1. Base-sugar-OH
2. Base-sugar-phosphate
3. Sugar-phosphate
4. (Base-sugar-phosphate)n
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