What is the atomic mass of the atom identified as A in the accompanying figure?
a. 2 amu
b. 6 amu
c. 8 amu
d. 12 amu
e. 18 amu
d
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Which of the following sequences correctly lists the hierarchical nature of cellular structures, from smallest to largest?
A) organic molecules, supramolecular structures, macromolecules, organelles, cells B) organelles, organic molecules, supramolecular structures, macromolecules, cells C) organic molecules, macromolecules, organelles, supramolecular structures, cells D) organic molecules, macromolecules, supramolecular structures, organelles, cells E) macromolecules, organic molecules, supramolecular structures, organelles, cells
The reaction of ethanol fermentation is: pyruvate + NADH ? ethanol + CO2 + NAD+. Why would a yeast need to perform this reaction in the absence of oxygen?
A. To produce CO2 for respiration. B. To produce NAD+ allowing glycolysis to continue. C. NADH is necessary to reduce pyruvate to lactate. D. To produce NAD+ allowing the electron transport chain to run. E. To consume excess pyruvate that cannot enter the Krebs cycle.
Which blood vessel type can function as blood volume reservoirs?
a. veins b. arteries c. arterioles d. capillaries e. ventricles
DNA sequencing using the dideoxy sequencing method involves PCR reactions using Taq polymerase, which we learned in this chapter can introduce errors because it lacks a proofreading mechanism
What precaution(s) can be taken in genomic or other sequencing projects to minimize the possibility of producing DNA sequences with errors?