Microbiology lecture midterm part 4

Multiple choice – Choose the one alternative that best completes the statement or answers the question: The term used to describe all of the chemical reactions within a cell is _____.

• catabolism

• redox reactions

• phosphorylation

• metabolism

• cellular respiration

Multiple choice – Choose the one alternative that best completes the statement or answers the question: Enzymes are _______.

• broken down in reactions that require energy input

• proteins that function as catalysts

• used up in chemical reactions

• not needed for catabolic reactions

• carbohydrate or protein in composition

Multiple choice – Choose the one alternative that best completes the statement or answers the question: The formation of peptide bonds between amino acids to build a polypeptide is an example of ______.

• anabolism

• phosphorylation

• fermentation

• catabolism

• glycolysis

Multiple choice – Choose the one alternative that best completes the statement or answers the question: Reactants are converted to products by ______.

• enzymes releasing energy

• breaking and forming bonds

• enzymes binding to products

• reactants always releasing energy

Multiple choice – Choose the one alternative that best completes the statement or answers the question: Each of the following are true of enzymes except ______.

• they can be used over and over

• they may or may not require cofactors

• their active site is specific to the substrate

• they increase the activation energy of a reaction

• their action may involve minerals

Multiple choice – Choose the one alternative that best completes the statement or answers the question: The cell's metabolic reactions involve the participation of ______ that lower the activation energy needed for the initiation of a reaction.

• cofactors

• vitamins

• enzymes

• ATP

• coenzymes

Multiple choice – Choose the one alternative that best completes the statement or answers the question: An apoenzyme is ______.

• part of a simple enzyme

• also called a coenzyme

• the protein part of a holoenzyme

• often an inorganic metal ion

• an RNA molecule

A holoenzyme is a combination of a protein and one or more substances called ______.

• substrates

• apoenzymes

• catalysts

• cofactors

• ribozymes

Important components of coenzymes are ______.

• vitamins

• metallic ions

• active sites

• substrates

• ribozymes

A type of cofactor would be ______.

• vitamins

• metallic ions

• active sites

• substrates

• ribozymes