In E. coli, the genes for utilization of maltose are at various locations across the chromosome but are activated by the same maltose activator protein. This is an example of a(n)
a. operon.
b. regulon.
c. riboswitch.
d. two-component regulatory system.
Answer: B
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Which of the following animals use air sacs to ventilate its lungs?
a. humans b. birds c. frogs d. reptiles e. horses
In diabetes mellitus, the problems associated
with this disorder arise because
a. fat breakdown produces harmful waste products. b. protein breakdown produces harmful waste products. c. excess glucose results in harmful substances. d. all of these (a through c) occur. e. fat breakdown and protein breakdown produce harmful waste products
Certain cells of sporophytes undergo meiosis to produce haploid reproductive cells called _____.
Fill in the blank(s) with the appropriate word(s).
A duplicated chromosome consists of two ________
A) centromeres B) centrosomes C) genomes D) sister chromatids