The plant hormone ____ has been shown to both promote pollen tube elongation and inhibit root elongation
a. jasmonate
b. ethylene
c. brassinosteroid
d. salicylic acid
e. oligosaccharin
ANSWER: c
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Which of the following is a reason why bioconversions are replacing chemical synthesis of certain compounds?
A. Bioconversions yield specific and biologically active stereoisomers. B. Enzyme catalyzed reactions in the bioconversion process proceed much more rapidly. C. Enzymes catalysts are not destroyed in the bioconversion process. D. Bioconversions facilitate the scaling up of reactions.
Evolution, viewed on a small scale, as it relates to changes in a single gene or allele frequency in a population over time, is called
A. macroevolution. B. speciation. C. genetic evolution. D. phenotypic evolution. E. microevolution.
In the microarray shown in your book, the cDNAs were labeled with red and green fluorescent tags
How then do you end up with spots on the microarray emitting yellow light?
a. In light, red and green are two of the primary colors, and the combination of the two will produce yellow light. b. The yellow light comes from the laser, and a yellow spot indicates that neither cDNA hybridized to that spot on the microarray. c. The over expression of one cDNA relative to the other will skew the color pattern of the spot on the microarray. This result in the yellow color. d. The color choice was an arbitrary decision by the artist and doesn't reflect how the process actually works. e. Yellow spots are those that contain no DNA probes on the chip.
In the lysogenic cycle _____.
a) host DNA is destroyed and viral DNA is replicated b) a bacterium replicates without passing viral DNA to its daughter cells c) viral DNA is destroyed and host DNA is replicated d) a bacterium divides once before the lytic cycle is initiated e) viral DNA is replicated along with host DNA