Question 1
Which bond is formed during the synthesis of polypeptides from amino acids?
A. Glycosidic bond
B. Peptide bond
C. Hydrogen bond
D. Ionic bond
Question 2
What is the significance of the diversity of proteins in terms of amino acid sequence?
A. It limits the function of proteins.
B. It results in identical protein structures.
C. It contributes to the variety of structures and functions of proteins in organisms.
D. It reduces the complexity of organisms.
Question 3
Which factor does NOT affect enzyme activity?
A. Light intensity
B. Temperature
C. pH level
D. Substrate concentration
Question 4
What is the role of enzymes in metabolic reactions?
A. They slow down reactions.
B. They act as biological catalysts.
C. They consume energy.
D. They change the products of reactions.
Question 5
Which of the following is NOT a function of proteins in organisms?
A. Energy storage
B. Hormonal regulation
C. Structural support
D. Transport of molecules
Question 6
a) Describe the general structure of amino acids and explain how peptide bonds are formed through condensation reactions. [4]
b) Discuss the significance of the formation of polypeptides in protein synthesis. [3]
Question 7
a) Explain the diversity of proteins in terms of amino acid sequence and its significance in the structure and function of organisms. [4]
b) Provide examples of structural proteins, hormones, antibodies, and receptors, and discuss their roles. [3]
Question 8
a) Define enzymes and explain their function as biological catalysts. [3]
b) Discuss the concept of the active site and enzyme-substrate complex in enzymatic reactions. [4]
Question 9
a) Elaborate on how the diversity of amino acid sequences contributes to the variety of functions that proteins perform in organisms. [4]
b) Discuss the role of structural proteins in organisms, providing examples. [3]
c) Explain how hormones, as a type of protein, regulate physiological processes. [3]
Question 10
a) Describe the process of peptide bond formation and its significance in building polypeptides. [3]
b) Discuss the importance of the Calvin cycle in relation to glucose formation and carbon capture. [4]
c) Explain the role of enzymes in metabolism, focusing on the factors affecting enzyme activity. [3]