The structure of bacterial chromosomes differs from that of eukaryotic organisms in all of the following except:
a. bacterial chromosomes are typically cir-cular.
b. the genes are polycistronic.
c. the bacteria have two copies of each chromosome.
d. bacterial mutations are easily transmitted or inherited.
C
Bacterial typically contain a single chromosome that is circular in nature. In order to maximize usage of a small genome, bacteria produce regions that are polycistronic or include multiple genes under the control of one region. Because bacteria typically contain one copy of the chromosome, mutations that are not lethal to the organism are easily transferred to successive generations.
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Glycogen is
(a) a polysaccharide. (b) a storage carbohydrate. (c) found in human tissues. (d) all of the above.
Which of the following is a reason for metabolic regulation?
A. Ensure efficient use of energy stores B. Maintain cell components at appropriate levels C. Conserve materials D. All of the choices are correct.
The most threatening infectious disease of the upper respiratory tract is
a) epiglottitis. b) pharyngitis. c) laryngitis. d) sinusitis.
The number of possible gametes, each with different chromosome compositions, is 2n, where n equals ________
A) the number of genes B) the number of alleles C) the diploid number D) the number of offspring E) the haploid number