Quiz in Enzymes & Vitamins

What is the primary function of enzymes in biological systems?

• Enzymes regulate body temperature

• Enzymes act as biological catalysts by lowering activation energy.

• Enzymes provide structural support to cells

• Enzymes store genetic information

Name the four levels of protein structure in enzymes.

• Primary, Secondary, Quaternary, Quinary

• Primary, Tertiary, Quaternary, Quinary

• Primary, Secondary, Tertiary, Quaternary

• Secondary, Tertiary, Quaternary, Quinary

Give an example of an enzyme that helps in the digestion of carbohydrates.

• Cellulase

• Protease

• Lipase

• Amylase

Explain the difference between competitive and non-competitive inhibition in enzyme kinetics.

• In competitive inhibition, the inhibitor binds to a different site on the enzyme.

• Non-competitive inhibition involves the inhibitor competing with the substrate for the active site.

• Competitive inhibition occurs when the inhibitor does not interfere with the enzyme-substrate complex formation.

• In competitive inhibition, the inhibitor competes with the substrate for the active site, while in non-competitive inhibition, the inhibitor binds to a different site on the enzyme.

What are the three main types of enzymes based on the reaction they catalyze?

• Ligases

• Isomerases

• Oxidoreductases, Transferases, Hydrolases

• Lyases

Define Michaelis-Menten constant (Km) in enzyme kinetics.

• Km is the substrate concentration at which the reaction rate is half of the maximum rate (Vmax/2).

• Km is the pH at which the enzyme is most active

• Km is the maximum rate of the reaction

• Km is the enzyme concentration at which the reaction rate is half of Vmax

How are vitamins classified based on their solubility?

• Sun-soluble and moon-soluble

• Air-soluble and earth-soluble

• Protein-soluble and fiber-soluble

• Water-soluble and fat-soluble

Which vitamin is essential for the synthesis of collagen in the body?

• Vitamin A

• Vitamin D

• Vitamin E

• Vitamin C

What is the role of vitamin B12 in metabolism?

• Vitamin B12 helps convert food into energy and is involved in the synthesis of DNA, fatty acids, and amino acids.

• Vitamin B12 is only needed for bone health

• Vitamin B12 is primarily responsible for muscle growth

• Vitamin B12 has no impact on metabolism

Name a vitamin that acts as an antioxidant in the body.

• Vitamin E

• Vitamin D

• Vitamin A

• Vitamin C