Which one of the following interactions plays a major role in stabilizing B-DNA? (1) Hydrogen bond (2) Hydrophobic interactions (3) Van der Wall’s interactions (4) Ionic interactions Comprehending B-DNA Stability: […]
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CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
Why is NaCl More Soluble in Water Than in Ethanol?
The Solubility of NaCl is greater in water than ethanol. What physical property of the solvent governs this difference ? (1) Surface tension (2) Viscosity (3) Dielectric constant (4 ) […]
CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
Electronegativity, π-Orbitals, Aromaticity & Dielectric Constant
11. Given below are some physicochemical properties (column X) and their manifestations (column Y). X […]
CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
The Effect of Radioactive Phosphorus on DNA Stability
When a radioactive phosphorus is incorporated into DNA strand, the phosphodiester bond generally break after a short while because- (1) The bond strength of phosphorus decreases (2) Phosphorus on radioactive […]
CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
Half-Life of Radioactive Materials
9. Half-life of radioactive material does not depend upon (1) Initial concentration of material (2) Decay constant (3) Type of radioisotope (4) Energy emission Understanding Half-Life: What Factors Do Not […]
CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
Hybridization and Bond Strength in sp³, sp², and sp¹ Orbitals
Arrange them according to decreasing order of strength (1) sp3>sp2>sp1 (2) sp1>sp2>sp3 (3) sp3>sp1>sp2 (4) sp1>sp3>sp2 Hybridization and Bond Strength: Arranging sp³, sp², and sp¹ Orbitals Understanding Hybridization and Bond […]
CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
Energy Released on Breaking the H-H Covalent Bond
What would be approx. energy released on breaking H- H covalent bond (1) 4.32 x 105 J/mol (2) 1 x 10-19 J/mol (3) 5 x 10-19 J/mol (4) 8 x […]
CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
What Determines Bond Strength in Covalent Compounds
Which of the following bonds will be most difficult to break? (1) C-O (2) C-P (3) C-N (4) C-S Strongest Covalent Bonds: Which Bond is Hardest to Break? What Determines […]
CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
Understanding Atomic Interaction Energy: Identifying Bond Types
The interaction energy between atom A and B is 400 kJ/mol-1. The type of interaction between them is (1) pi – pi. (2) covalent. (3) ion-dipole. (4) hydrogen bond. Understanding […]
CSIR NET Previous Year Questions on Biochemistry Atoms & Molecules
Covalent Bond Formation: How Atoms Share Electrons
Covalent bond formation between two atoms takes place by (1) Transfer of electron from one atom to other (2) One Side sharing of electrons (3) Electron sharing by two electronegative […]
