Which of the following makes water liquid at room temperature?
Noncovalent interactions
Hydrogen bonding
Van der Waals forces of attraction
Covalent bonding
What is the heat of the vaporization of water?
580 kJ/g
40.65 kJ/g
1060 kJ/g
600 kJ/g
Which of the following parameters does not depend on the degree of ionization?
Nature of solvent
Temperature
Volume of electrolyte
Current
What compound in an aqueous solution of equimolar concentration acts as a buffer solution?
Ammonium chloride
Ammonium Sulfide
Ammonium oxide
Ammonium hydroxide
What are the enzymes that catalyze hydrolytic reactions?
Oxidoreductase
Aldolase
Isomerase
Ligase
What is a 39-residue hormone of the anterior pituitary gland?
Adrenocorticotropin hormone
Bradykinin
Corticotropin
Insulin
Who discovered the double-helix structure of DNA?
Rosalind Franklin and James Crick
Maurice Wilkins and Robert Franklin
James Watson and Francis Crick
Johann Friedrich and Lalji Singh
Which of the following temperatures is most suitable for the growth and proliferation of transformed cells?
25 °C to 27°C
36°C to 37°C
18°C to 19°C
5°C to 6°C
Which enzyme is used in PCR?
EcoRII
EcoRI
Taq DNA polymerase
HRP
Which membrane has less cholesterol and more cardiolipin?
Cell wall
Inner mitochondrial membrane
Myelin sheath
Plasma membrane
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