The Biomolecules chapter in biology covers the various types of molecules that are essential for life. These molecules include carbohydrates, proteins, lipids, and nucleic acids. To test your knowledge on this topic, here are some multiple-choice questions (MCQs) along with their explanations:

1. Which of the following biomolecules is the main source of energy for living organisms?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer: a) Carbohydrates

Explanation: Carbohydrates are the primary source of energy for living organisms. They are broken down into glucose, which is further utilized in cellular respiration to produce ATP (adenosine triphosphate), the energy currency of the cell.

2. Which biomolecule is responsible for the storage and transmission of genetic information?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer: d) Nucleic acids

Explanation: Nucleic acids, specifically DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), are responsible for storing and transmitting genetic information. DNA contains the instructions for building and maintaining an organism, while RNA plays a role in protein synthesis.

3. Which biomolecule is composed of amino acids and is involved in various cellular functions?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer: b) Proteins

Explanation: Proteins are composed of amino acids and are involved in various cellular functions. They serve as enzymes, structural components, transporters, antibodies, and hormones, among other roles in the body.

4. Which of the following biomolecules is insoluble in water?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer: c) Lipids

Explanation: Lipids are insoluble in water due to their hydrophobic nature. They include fats, oils, waxes, and steroids. Lipids serve as a long-term energy storage molecule, provide insulation, and form the structural components of cell membranes.

5. Which biomolecule provides structural support to plants and is composed of cellulose?
a) Carbohydrates
b) Proteins
c) Lipids
d) Nucleic acids

Answer: a) Carbohydrates

Explanation: Carbohydrates provide structural support to plants in the form of cellulose. Cellulose is a complex carbohydrate that forms the cell walls of plant cells, providing rigidity and support.

In conclusion, understanding the different types of biomolecules and their functions is crucial in biology. Carbohydrates, proteins, lipids, and nucleic acids play vital roles in various cellular processes. By answering these MCQs, you can assess your knowledge and reinforce your understanding of this important chapter in biology.

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