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Biochem 1 ACS Questions and Answers Graded A+
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Exam of 4 pages for the course Biochemistry ACS at Biochemistry ACS (Biochem 1 ACS)
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Biochem 1 ACSSample A absorbs light at 260nm, and Sample B absorbs light at 280nm. Of the choices
below, which macromolecules are likely to be present in each sample, respectively? -
answer Nucleic acid and protein
A researcher denatures a polypeptide. What can you conclude about this denatured
polypeptide? - answer It will have lost its intermolecular forces between nitrogen and
hydrogen atoms
According to Michaelis-Menton kinetics, what is a characteristic of the rate limiting step
in enzyme kinetics? - answer It is dependent on activation energy from catalysis
What happens to the Vmax of an enzyme-catalyzed reaction when a competitive
inhibitor of the enzyme is added? – answer Vmax does not change
Uncompetitive inhibition - answer Lowers Vmax and Km
Noncompetitive inhibition - answer Lowers Vmax only
In which of the following cases would the citric acid cycle be downregulated? - answer
High levels of ATP
Which of the following metabolic processes directly requires oxygen? - answer Electron
transport system
What would be the most immediate result if complex II of the electron transport chain
suddenly stopped working? - answer Buildup of succinate in the mitochondrial matrix
Where in a cell are fatty acids broken down via β-oxidation? - answer mitochondria
catabolic pathway - answer Catabolic pathways break down molecules and produce
energy.
-glycolysis, the citric acid cycle, the breakdown of muscle protein in order to use amino
acids as substrates for gluconeogenesis, the breakdown of fat in adipose tissue to fatty
acids, and oxidative deamination of neurotransmitters by monoamine oxidase.
Anabolic pathway - answer Anabolic pathways synthesize molecules and require
energy.
-Building glucose from carbon dioxide is one example. Other examples include the
synthesis of proteins from amino acids, or of DNA strands from nucleic acid building
blocks (nucleotides).
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