CBSE
Multiple Choice QuestionsThe amino acid, trytophan is the precussor for the synthesis of
thyroxine and tri-iodothryonine
estrogen and progesterone
cortisol and cortisone
cortisol and cortisone
Which one of the following is a non-reducing carbohydrate?
Maltose
Sucrose
Lactose
Lactose
A typical fat molecule is made up of
One glycerol and three fatty acid molecules
One glycerol and one fatty acid moleule
Thre glycerol and three fatty acid molecules
Thre glycerol and three fatty acid molecules
Macromolecule chitin is
Nitrogen containing polysaccharide
phosphorus-containing polysaccharide
sulphur containing polysaccharide
sulphur containing polysaccharide
Select the option which is not correct with respect to enzyme action.
Substrate binds with enzyme as its active site
Addition of lot of succinate does not reverse the inhibition of succinic dehydrogenase by malonate
A non- competitive inhibitor binds the enzyme at asite distinct from that which binds as the substrate
A non- competitive inhibitor binds the enzyme at asite distinct from that which binds as the substrate
Which of the metabolites is common to respiration mediated breakdown of fats, carbohydrates and proteins?
Glucose-6-phosphate
Fructose 1, 6-biphosphate
Pyruvic acid
Pyruvic acid
Transition state structure of the substrate formed during an enzymatic reaction is
transient but stable
permanent but unstable
transient and unstable
transient and unstable
Which one of the following statements is wrong?
cellulose is a polysaccharide
Uracil is a pyrimidine
Glycine is a sulphur containing amino acid
Glycine is a sulphur containing amino acid
Which of the following biomolecules does have a phosphodiester bond?
Fatty acids in a diglyceride
Monosaccharides in a polysaccharide
Amino acids in a polypeptide
Amino acids in a polypeptide
The essential chemical components of many coenzymes are
proteins
nuclei acids
carbohydrates
carbohydrates
