Q.1
Which of the following is a hypertonic solution?
  • a) Oceans
  • b) Freshwater habitats
  • c) 0.45% sodium chloride
  • d) Red blood cells placed in fresh water
Q.2
If pH of solution of NaOH is 12.0 the pH of H2SO4 solution of same molarity will be ____________
  • a) 2.0
  • b) 12.0
  • c) 1.7
  • d) 10.0387
Q.3
NaCl andHCl are present in an aqueous solution. What is the solution?
  • a) Not a buffer solution with pH < 7
  • b) Not a buffer solution with pH > 7
  • c) A buffer solution with pH < 7
  • d) A buffer solution with pH > 7
Q.4
What does it mean when we say that water acts as a “heat buffer”?
  • a) It keeps the temperature of an organism relatively constant as the temperature of the surroundings fluctuates
  • b) It increases the temperature of an organism as the temperature of the surroundings increases
  • c) It decreases the temperature of an organism as the temperature of the surroundings increases
  • d) It increases the temperature of an organism as the temperature of the surroundings decreases
Q.5
What trend does the reactivity of group II elements follow with water?
  • a) Increases down the group
  • b) Decreases down the group
  • c) Does not follow any particular trend
  • d) No reaction
Q.6
Which of the following is not the classified form of conjugated proteins?
  • a) Lipoproteins
  • b) Glycoproteins
  • c) Metalloproteins
  • d) Complete proteins
Q.7
Tertiary conformation of proteins is maintained by 3 types of bonds namely ionic, hydrogen and ____________
  • a) Sulfide
  • b) Disulfide
  • c) Covalent
  • d) Peptide
Q.8
Which of the following is true?
  • a) The disulfide bridges formed by reduction of the sulfhydryl groups on cysteine stabilizes protein tertiary structure
  • b) The disulfide bridges formed by oxidation of the sulfhydryl groups on cysteine destabilize protein tertiary structure
  • c) The disulfide bridges formed by oxidation of the sulfhydryl groups on cysteine stabilizes protein tertiary structure
  • d) The disulfide bridges formed by reduction of the sulfhydryl groups on cysteine destabilize protein tertiary structure
Q.9
Instructure of proteins, folding and shaping is done by ____________
  • a) Hydrophobic interactions
  • b) Polar interactions
  • c) Hydrogen bonding
  • d) None of the mentioned
Q.10
Which of the following does not affect the stability of an α-helix?
  • a) Electrostatic repulsion
  • b) Bulkiness
  • c) Interaction between R groups spaced three residues apart
  • d) Occurrence of alanine and glycine residues
0 h : 0 m : 1 s