Biomolecules
Evaluation
1. The most basic amino acid is
a. Arginine
b.
Histidine
c.
Glycine
d.
Glutamine
2. An example of feedback
inhibition is
a.
Cyanide action on cytochrome
b.
Sulpha drug on folic acid synthesiser bacteria
c. Allosteric inhibition of
hexokinase by glucose-6-phosphate
d.
The inhibition of succinic dehydrogenase by malonate
3. Enzymes that catalyse
interconversion of optical, geometrical or positional isomers are
a.
Ligases
b.
Lyases
c. Hydrolases
d.
Isomerases
4. Proteins perform many
physiological functions. For example some functions as enzymes. One of the
following represents an additional function that some proteins discharge:
a.
Antibiotics
b.
Pigment conferring colour to skin
c.
Pigments making colours of flowers
d. Hormones
5.
Given below is the diagrammatic representation of one of the categories of
small molecular weight organic compounds in the living tissues. Identify the
category shown & one blank component “ X” in it
Category : Compound
Cholesterol
: Guanine
Amino
acid : NH2
Nucleotide
: Adenine
Nucleoside : Uracil
6.
Distinguish between nitrogenous base and a base found in inorganic chemistry.
7.
What are the factors affecting the rate of enzyme reaction?
8.
Briefly outline the classification of enzymes
9.
Write the characteristic feature of DNA
10.
Explain the structure and function of different types of RNA
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