821. A-Amylose is similar to:
A. B-Sheets
B. B-Turned coils
(C. A-Helices)
D. The Hydrophobic core
822. Storage polysaccharide made by animals is:
A. Amylopectin
(B. Glycogen)
C. Cellulose
D. Collagen
823. The Glycosidic bond:
A. In Maltose is not hydrolyzed in lactose intolerant humans
B. In sucrose is hydrolyzed by bees
(C. Joins glucose and fructose to form sucrose)
D. Both B and C
824. A group of ribosomes attached to mRNA is known as___________?
A. Polymer
B. Polypeptide
(C. Polysomes)
D. Monomer
825. The rate of reaction is directly proportional to the concentration of an enzyme; which statement is incorrect in this respect?
A. Increase in enzyme molecule increases the available active sites.
B. This relation is for an unlimited time period with unlimited enzyme concentration
(C. If the concentration is doubled, the rate will become two-fold)
D. None of these
826. Which statement is incorrect about the Lock and Key Model?
A. Specific enzymes can transform only a specific substrate
B. The active site of an enzyme is a non-flexible structure
(C. Active site does not change before, during, or even after the reaction)
D. It explains the mechanism of every chemical reaction
827. If the concentration of the enzyme is kept constant and the amount of substrate is increased, a point is reached where an increase in substrate concentration does not affect the reaction rate because of____________________?
A. Enzymes get denatured at higher substrate conc
B. Rate of reaction is indirectly proportional to substrate concentration at this point
(C. All the active sites on the enzyme molecule are occupied)
D. None of these
828. The active site of an enzyme______________?
A. Never changes
B. Forms no chemical bond with substrate
(C. Determined by the structure and the specificity of the enzyme)
D. They are non-specific in their action
829. Factory of Ribosomal synthesis is__________?
A. Cytoplasm
B. Nucleus
(C. Nucleolus)
D. Endoplasmic reticulum
830. Cellular organelles related to H2O2 are___________?
A. Glyoxisomes
B. Lysosomes
(C. Peroxisomes)
D. Ribosomes
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