Chapter 15 Principles of Metabolic Regulation
Which of the following does not contribute to the regulation of enzymatic activity?
A) Protein phosphorylation
B) Allosteric regulation
C) Protein stability
D) mRNA stability
E) DNA stability
For an enzyme t
Chapter 28 Regulation of Gene Expression
1. "Housekeeping genes" in bacteria are commonly expressed constitutively, but not all of these genes
are expressed at the same level (the same number of molecules per cell). The primary mechanism
responsible for v
Chapter 26 RNA Metabolism
1. RNA polymerase:
A) binds tightly to a region of DNA thousands of base pairs away from the DNA to be transcribed.
B) can synthesize RNA chains without a primer.
C) has a subunit called (lambda), which acts as a proofreading rib
Chapter 27 Protein Metabolism
1. A certain bacterial mRNA is known to represent only one gene and to contain about 800
nucleotides. If you assume that the average amino acid residue contributes 110 to the peptide
molecular weight, the largest polypeptide
Chapter 22 Biosynthesis of Amino Acids, Nucleotides, and Related Molecules
Which of the following statements about the fixation of atmospheric nitrogen (N2) into NH3 by living
cells is false?
A) It involves the transfer of eight electrons per mol of N2.
Chapter 21 Lipid Biosynthesis
Which of the following is not required in the synthesis of fatty acids?
C) HCO3- (CO2)
Which of the following is not true of the reaction producing malonyl-CoA during fat
Chapter 19 Oxidative Phosphorylation
Which of the following are true of photosynthesis?
Select one or more:
a. NADP+ is reduced to NADPH via the light-dependent reactions
b. Occurs only in plants
c. ATP is synthesized via the light-dependent reactions
Chapter 20 Carbohydrate Biosynthesis in Plants
The compound that condenses with CO2
in the first reaction of carbon dioxide assimilation is:
B) ribose 1,5-bisphosphate.
C) ribulose 1,5-bisphosphate.
D) ribulose 5-phosphate.
Chapter 17 Fatty Acid Catabolism
1. Lipoprotein lipase acts in:
A) hydrolysis of triacylglycerols of plasma lipoproteins to supply fatty acids to various tissues.
B) intestinal uptake of dietary fat.
C) intracellular lipid breakdown of lipoproteins.
Chapter 18 Amino Acid Oxidation and the Production of Urea
1. Under which circumstances are amino acids not metabolized via oxidative degradation?
B) Plants growing in nutrient-rich soils
C) Normal protein turnover
D) A diet rich in proteins
Chapter 16 The Citric Acid Cycle
1. Which of the following is not true of the reaction catalyzed by the pyruvate dehydrogenase
A) Biotin participates in the decarboxylation.
B) Both NAD+ and a flavin nucleotide act as electron carriers.
C) The re
Chapter 13 Bioenergetics and Biochemical Reaction Types
1. If the delta G' of the reaction A -> B is -40 kJ/mol, under standard conditions the reaction:
A) is at equilibrium.
B) will never reach equilibrium.
C) will not occur spontaneously.
Chapter 14 Glycolysis, Gluconeogenesis, and the PPP
Glycolysis is the name given to a metabolic pathway occurring in many different cell types. It consists
of 11 enzymatic steps that convert glucose to lactic acid. Glycolysis is an example o