BE101-Tutorial 2

Polysaccharides are polymers of

• Amino acids

• Fatty acids

• Sugars

• Nucleic Acids

In healthy individuals, increase in blood sugar after food intake leads to

• Release of Insulin hormone

• Release of Glucagon hormone

• Breakdown of stored glycogen

• Breakdown of stored starch

Which of the following does NOT contain a sugar moiety

• Starch

• Deoxyribonucleic Acid

• Polypeptide

• Polysaccharide

The Miller Urey experiment proved

• Organic molecules can form from inorganic molecules in ancient like atmosphere

• Oxygen is required for evolution of living organisms

• Carbon based lifeform on earth came from extraterrestrial beings

• Silicon is the most abundant element on earth

Which of the following is NOT true about cholesterol

• They have polar head group and non polar hydrocarbon tail

• Cholesterol is both produced in the body and obtained from food

• They are always harmful to us.

• They are transported in the body via lipoproteins

Cellular membranes comprise

• Lipids

• Proteins

• Cholesterol

• All of the above

Saturated fats have high melting point because

• They have ordered zig zag molecular structure

• They have double bonds in the fatty acid chains

• They have trapped water molecules within their structures

• They are only produced through industrial processes

Which of the following  interactions play important role in formation of protein secondary structures

• Ionic bonds

• Covalent bonds

• Hydrogen bonds

• Disulfide bonds

Enzymes function by

• Increasing the activation energy required for the reaction

• Decreasing the activation energy required for the reaction

• Acting as co-substrate

• Altering the stoichiometry of reaction

Which of the following experimental techniques are used to understand three dimensional structure of proteins

• X-ray crystallography

• Nuclear Magnetic Resonance Spectroscopy

• Cryo-electron microscopy

• All of the above