Biochemistry
In which of the following reactions, is the unit of rat constant and rate of reaction the same? (1) 1″ order reaction (2) 2nd order reaction (3) 3’d order reaction (4) Zero order reaction Answer: The unit of the rate constant and the rate of reaction will be the same for a zero-order reaction. This … Read more
Sucrose is a disaccharide with molecular weight of 342 Daltons, preparing 500 ml of 0.1M solution would require. (1) 17.1 gm of sucrose (2) 0.171 gm of sucrose (3) 1.71 gm of sucrose (41)171 gm of sucrose
The total number of cells in the body of an individual is 6 x 1015. If he is administered with 5.8 mg of insulin (MW:5808 Da), how many molecules will be there in each cell (presume that the drug penetrates all cells in, the body with equal efficiency)? (1) 100 (2) 10 (3) 1000 (4) … Read more
What would be the number of protein molecules present in 1.0 mg of protein having a molecular weight of 25 kDa? (1) 2.4×1015 (2) 2.4×1016 (3) 2.4×1017 (4)2.4×1018 To calculate the number of protein molecules in 1.0 mg of protein with a molecular weight of 25 kDa, we can follow these steps: Given:
While making 100 ml of 2M NaCl solution, a student left the solution on a heating platform reducing the volume by 50 ml. This solution was diluted 1:100 for use. What is the final concentration of NaCl in this solution? (1) 20 mm , (2) 80 mm (3)40 mM . (4) 400 mM
You have a freshly prepared 0.1 M solution of glucose in water. Each liter of this solution contains how many glucose molecules? (1) 6.02 * 10 ^ 23 (3) 6.02 * 10 ^ 24 (2) 3.01 * 10 ^ 23 (4) 6.02 * 10 ^ 22 Let’s break down the problem: Given: So, a 0.1 … Read more
Which of the following is not a colligative property. which arises in systems when there is addition of solute? (1) Lowering of vapour pressure (2) Lowering of melting point (3) Lowering of boiling point (4) Increase of osmotic pressure Colligative Properties: These properties depend only on the number of solute particles in a solution, not … Read more
Within the aqueous environment of an animal cell, sugars are stored as polymers rather than as monomers. If the sugars were stored as monomers instead of polymers, which of the following properties would be LEAST affected? (1) Freezing point (3) Viscosity (2) Osmotic pressure (4) pH et’s think about the properties of monomers versus polymers … Read more
Osmotic pressure does not depend on (1) Temperature (3) Molecular weight (2) Degree of ionization (4) Molar concentration Osmotic Pressure: Osmotic pressure is the pressure required to stop the flow of solvent through a semi-permeable membrane separating two solutions of different concentrations. It depends on the concentration of solute particles in the solution. Formula for … Read more
Which of the following will have maximum effect on lowering in vapour pressure if added in equimolar concentration?(1) Sucrose(3) NaCl(2) Glucose(4) CaCl₂ What is Vapor Pressure Lowering? When you add a solute (like sugar or salt) to a solvent (like water), it lowers the vapor pressure of the solvent. This is called lowering of vapor … Read more