1st Year Biology Chapter 4 TestMolecular Biology

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. What enzyme is involved in the synthesis of RNA from DNA?

   1. DNA polymerase

   2. RNA polymerase

   3. Ligase

   4. Helicase

2. Which protein maintains the osmotic concentration of blood?

   1. Fibrinogen

   2. Albumin

   3. Myosin

   4. Tubulin

3. What is a hydrogen bond?

   1. A covalent bond between hydrogen atoms

   2. A weak attraction between polar molecules

   3. A bond between two hydrogen atoms

   4. A bond in metals

4. What makes globular proteins more functional than fibrous ones?

   1. Linear structure

   2. Compact, folded shape

   3. Elasticity

   4. Insolubility

5. Ionic bonds form due to:

   1. Sharing of neutrons

   2. Transfer of electrons between atoms

   3. Exchange of protons

   4. No interaction

6. What kind of interaction occurs between nonpolar molecules in water?

   1. Ionic interaction

   2. Hydrophobic interaction

   3. Covalent interaction

   4. Hydrogen bonding

7. Cellulose is composed of which type of glucose?

   1. Alpha-glucose only

   2. Beta-glucose

   3. Fructose

   4. Mixed sugars

8. Which projection shows sugar in a ring form?

   1. Fischer projection

   2. Haworth projection

   3. Lewis structure

   4. Kekulé structure

9. What is the smallest chain of insulin composed of?

   1. 30 amino acids

   2. 21 amino acids

   3. 50 amino acids

   4. 146 amino acids

10. Sucrose is a combination of which two sugars?

    1. Glucose and maltose

    2. Glucose and galactose

    3. Glucose and fructose

    4. Galactose and ribose