- Aflatoxin is produced by
(a) Ephedra (b) Aspergillus flavus
(c) Solanum tuberosum (d) Plantago ovata. - Excess accumulation of gangliosides leads to
(a) Tay-Sachs disease (b) phenylketonuria
(c) rhinitis (d) none of these. - Enkephalins are produced by
(a) cartilage cells (b) bone cells
(c) adipose cells (d) nerve cells. - The protein present in silk is
(a) fibrin (b) keratin
(c) fibroin (d) glutelin. - Chitin is present in
(a) cell wall of fungi
(b) exoskeleton of arthropods
(c) both (a) and (b)
(d) none of these.
Exam Section
- Which of the following is the least likely to be involved in
stabilising the three-dimensional folding of most proteins?
(a) Hydrogen bonds (b) Electrostatic interaction
(c) Hydrophobic interaction
(d) Ester bonds (NEET Phase-II, 2016) - The two polypeptides of human insulin are linked together
by
(a) covalent bond (b) disulphide bridges
(c) hydrogen bonds (d) phosphodiester bond.
(NEET Phase-I, 2016) - Identify the given structure.
(a) Adenylic acid
(b) Uracil
(c) Cholesterol
(d) Adenosine
(AIIMS, 2016) - Cholesterol is a precursor for each of the following except
(a) bile salts (b) vitamin D
(c) insulin (d) steroids. (AIIMS, 2015) - Which one of the following combinations of all three fatty
acids are essential for human beings?
(a) Oleic acid, linoleic acid and linolenic acid
(b) Palmitic acid, linoleic acid and arachidonic acid
(c) Oleic acid, linoleic acid and arachidonic acid
(d) Linoleic acid, linolenic acid and arachidonic acid
(WB JEE, 2015) - In the ribose of RNA, unlike DNA, every nucleotide residue
has an additional
(a) COOH group in the 2′ position
(b) OH group in the 5′ position
(c) OH group in the 2′ position
(d) Phosphate group in the 2′ position
(e) Uracil in the 5′ position. (Kerala PMT, 2015)- Which one of the following cannot be attributed to
glycogen?
(a) Homopolysaccharide
(b) Heteropolysaccharide
(c) Branched chain molecule
(d) Stored in liver and muscle (AMU, 2015) - Which of the following options consist of non-essential amino
acids only?
(a) Valine, leucine, glycine, alanine
(b) Glycine, serine, proline, glutamic acid
(c) Proline, aspartic acid, glutamic acid, methionine
(d) Cysteine, tyrosine, alanine, isoleucine
(AIIMS, 2014) - Select the option which is not correct with respect to enzyme
action.
(a) Substrate binds with enzyme at its active site.
(b) Addition of lot of succinate does not reverse the
inhibition of succinic dehydrogenase by malonate.
(c) A non - competitive inhibitor binds the enzyme at a site
distinct from that which binds the substrate.
(d) Malonate is a competitive inhibitor of succinic
dehydrogenase. (AIPMT, 2014) - Fish proteins are considered nutritionally superior to most
vegetable proteins because they are rich in
(a) all the 20 amino acids (b) essential amino acids
(c) peptide bonds (d) polypeptides.
(AMU, 2014) - Macromolecule chitin is
(a) sulphur containing polysaccharide
(b) simple polysaccharide
(c) nitrogen containing polysaccharide
(d) phosphorous containing polysaccharide.
(NEET, 2013) - A phosphoglyceride is always made up of
(a) a saturated or unsaturated fatty acid esterified to a
glycerol molecule to which a phosphate group is also
attached
(b) a saturated or unsaturated fatty acid esterified to a
phosphate group which is also attached to a glycerol
molecule
(c) only a saturated fatty acid esterified to a glycerol
molecule to which a phosphate group is also attached
(d) only an unsaturated fatty acid esterified to a glycerol
molecule to which a phosphate group is also attached.
(NEET, 2013)