Microbial Metabolism Practice Quiz Bank, Exam 2 Questions With Complete Solutions

What term refers to all of the chemical reactions taking place in a cell? A. Catabolism B. Redox reactions C. Phosphorylation D. Metabolism E. Cellular respiration correct answer: D) Metabolism The breakdown of peptidoglycan to N‐acetylmuramic acid, N‐acetylglucosamine and peptides by a microbe is an example of A. Anabolism B. Catabolism C. Phosphorylation D. Fermentation correct answer: B) Catabolism Enzymes are typically A. Broken down in reactions that requires energy input B. Proteins that function as catalysts C. Used up in chemical reactions D. Not needed for catabolic reactions E. All of the choices are correct correct answer: B) Proteins that function as catalysts Formation of peptide bonds between amino acids to build a polypeptide would be called A. Anabolism B. Phosphorylation C. Fermentation D. Exergonic E. Glycolysis correct answer: A) Anabolism Each of the following are true of enzymes except A. They can be used over and over B. They may or may not require cofactors C. Their active site is specific to the substrate D. They increase the activation energy of a reaction E. All of the choices are true of enzymes correct answer: D) They increase the activation energy of a reaction The cell's metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction. A. Cofactors B. Vitamins C. Enzymes D. ATP E. Coenzymes correct answer: C) Enzymes An apoenzyme A. Is part of a simple enzyme B. Is also called a coenzyme C. Is the protein part of a holoenzyme D. Is often an inorganic metal ion E. Is an RNA molecule correct answer: C) Is the protein part of a holoenzyme A holoenzyme is a combination of a protein and one or more substances called A. Substrates B. Apoenzymes C. Catalysts D. Cofactors E. None of the choices are correct correct answer: D) Cofactors