Fruits often ripen faster when placed in closed paper bags because of the effect of
(A) cytokinin
(B) abscisic acid
(C) CO2
(D) gibberellin
(E) ethylene
Ans: (E) ethylene
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Which of the following plants were dominant
in the Carboniferous period?
a. club mosses b. peat mosses c. ferns d. liverworts e. more than one of these
Which of the following is a source of electrons that plants use for reduction reactions during photosynthesis?
A) CO2 B) RuBP C) O2 D) H2O E) Glucose
In order for a eukaryotic gene to be engineered into a bacterial colony to be expressed, what must be included in addition to the coding exons of the gene?
A. eukaryotic tRNAs B. a bacterial promoter sequence C. the introns D. eukaryotic ribosomal subunits E. eukaryotic polymerases
A female who is a carrier of the sex-linked gene A has the genotype
a. Aa. b. AA. c. aa. d. XAXa.