9. Biomolecules

Correct Answer: B

1. Proteins are large biomolecules found in living organisms.
2. They are made up of amino acids.
3. Amino acids are linked by peptide bonds.
4. Long chains of amino acids are formed.
5. Such chains are called polypeptides.
6. Proteins may consist of one or more polypeptide chains.
7. Hence, proteins are polypeptides.
8. Therefore, the correct answer is polypeptides.

Correct Answer: B

1. Proteins are made up of amino acids.
2. These amino acids join together to form chains.
3. The chains are linear in structure.
4. The linkage between amino acids is called peptide bond.
5. This bond forms between amino and carboxyl groups.
6. Repeated linkage forms polypeptide chain.
7. Hence, proteins are linear chains of amino acids linked by peptide bonds.
8. Therefore, the correct answer is option (b).

Correct Answer: C

1. Proteins are large biomolecules.
2. They are formed by linking smaller units.
3. These smaller units are amino acids.
4. Amino acids join through peptide bonds.
5. This forms long chains called polypeptides.
6. A polymer is made of repeating units.
7. Hence, proteins are polymers of amino acids.
8. Therefore, the correct answer is amino acids.

Correct Answer: B

1. Proteins are made up of amino acids.
2. There are 20 different types of amino acids in living organisms.
3. These amino acids differ in their R groups.
4. Proteins contain a mixture of different amino acids.
5. A polymer with different types of monomers is called heteropolymer.
6. A homopolymer has only one type of monomer.
7. Since proteins contain different amino acids, they are heteropolymers.
8. Hence, the correct answer is 20 and heteropolymer.

Correct Answer: B

1. Polymers are made of repeating units called monomers.
2. If all repeating units are the same, it is a homopolymer.
3. Example: cellulose has only glucose units.
4. In contrast, heteropolymers have different monomers.
5. Proteins are heteropolymers.
6. Hence, homopolymer contains one type of monomer repeated many times.
7. Therefore, the correct answer is homopolymer.

Correct Answer: B

1. Amino acids are building blocks of proteins.
2. Some amino acids can be synthesized by the body.
3. Others cannot be made inside the body.
4. These are called essential amino acids.
5. They are necessary for normal body functions.
6. Hence, they must be obtained from outside.
7. Food intake provides these amino acids.
8. This is called diet.
9. Therefore, the correct answer is diet.
10. This matches the given statement exactly.

Correct Answer: B

1. Proteins in food are called dietary proteins.
2. These proteins are broken down during digestion.
3. They release amino acids.
4. Some amino acids cannot be made by the body.
5. These are called essential amino acids.
6. Hence, they must be obtained from food.
7. Dietary proteins provide these essential amino acids.
8. Therefore, the correct answer is amino acids.

Correct Answer: B

1. Amino acids are building blocks of proteins.
2. Some amino acids cannot be synthesized by the body.
3. These are called essential amino acids.
4. They must be obtained from diet.
5. Other amino acids can be synthesized by the body.
6. These are called non-essential amino acids.
7. This classification is based on nutritional requirement.
8. Hence, amino acids are essential or non-essential.
9. Therefore, the correct answer is essential and non-essential.

Correct Answer: B

1. Amino acids are of two types: essential and non-essential.
2. Essential amino acids must be obtained from diet.
3. Non-essential amino acids are produced internally.
4. The term 'latter' refers to non-essential amino acids.
5. These are synthesized by the body itself.
6. Hence, our body can make them.
7. Therefore, the correct answer is our body.

Correct Answer: A

1. Proteins perform various functions in living organisms.
2. Some proteins help in transport of nutrients across cell membrane.
3. Some proteins protect the body by fighting infectious organisms.
4. Certain proteins act as hormones regulating body processes.
5. Some proteins act as enzymes catalysing biochemical reactions.
6. These roles are essential for survival.
7. Hence, proteins are multifunctional molecules.
8. Therefore, the correct answer is option (a).

Correct Answer: A

1. Proteins are abundant biomolecules in living organisms.
2. In animals, collagen is the most abundant protein.
3. It provides structural support in connective tissues.
4. In the entire biosphere, RuBisCO is the most abundant protein.
5. RuBisCO is involved in photosynthesis.
6. It helps in carbon fixation in plants.
7. Due to its universal presence, it is highly abundant.
8. Hence, collagen and RuBisCO are correct.
9. Therefore, option (a) is correct.

Correct Answer: A

1. Collagen is a structural protein present in intercellular ground substance.
2. Trypsin is a digestive enzyme.
3. Insulin is a hormone regulating blood glucose.
4. Antibodies help fight infectious agents.
5. Receptors are involved in sensory reception like smell and taste.
6. GLUT-4 helps in glucose transport into cells.
7. These are specific functions of proteins.
8. Hence, option (a) correctly matches all.
9. Therefore, the correct answer is option (a).