M5 L1 : Biochemistry Lecture

What is one of the functions of proteins?

• Energy storage

• Catalysis

• Genetic information storage

• Structural support

How were enzymes named in the early days of biochemistry?

• By using numbers

• By adding the suffix 'ase' to the name of the substrate

• By adding the suffix 'ide' to the name of the substrate

• By using random letters

In 1955, a systematic way of naming enzymes was instituted by which organization?

• International Commission on Enzymes (ICE)

• World Health Organization (WHO)

• United Nations Educational, Scientific and Cultural Organization (UNESCO)

• Food and Agriculture Organization (FAO)

What is the classification of enzymes based on the type of chemical reaction they catalyze?

• Acid-base classification

• Temperature classification

• pH classification

• Functional classification

What is the main characteristic of enzymes in terms of specificity?

• They can act on any substrate

• They have low specificity

• They have high specificity

• They can only act on proteins

Which theory describes the job of enzymes as templates binding to substrates?

• Lock-and-key theory

• Induced fit theory

• Substrate theory

• Catalysis theory

What is the main role of enzymes in living organisms?

• Energy production

• Cell division

• DNA replication

• Catalyzing chemical reactions

How do enzymes speed up chemical reactions?

• By providing additional energy

• By decreasing temperature

• By increasing pressure

• By acting as catalysts

What is the function of the enzyme aconitase in the Citric Acid Cycle?

• Converts aconitate to citrate

• Converts citrate to aconitate

• Converts isocitrate to citrate

• Converts citrate to isocitrate

What is the main advantage of enzymes in catalyzing reactions?

• They are slow

• They require high temperatures

• They are irreversible

• They can be reused