Studies have shown that in the flowering plant Arabidopsis the root-shoot axis is established
a. by the first cell division of the embryo.
b. within hours after the seed germinates.
c. during the torpedo stage of embryonic development.
d. shortly after the eight-cell embryo stage.
e. by plant tissues breaking through the seed coat and making contact with soil.
A
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A gene is best defined as
A) any random segment of DNA. B) a sequence of nucleotides in RNA that codes for a functional product. C) the RNA product of a transcribed section of DNA. D) three nucleotides that code for an amino acid. E) a sequence of nucleotides in DNA that codes for a functional product.
Which wavelength of light is the shortest?
A. X-rays B. infrared C. UV light D. visible light E. gamma rays
Which of the following processes would be most likely to occur in the Golgi complex?
A) synthesis of steroids B) production and packaging of lipids C) glycosylation of proteins D) synthesis of DNA E) detoxification of drugs
Which of the following will bind to the active site of an enzyme?
A) Competitive inhibitor only B) Noncompetitive inhibitor only C) Allosteric inhibitor only D) Substrate only E) Both substrate and competitive inhibitor