The osmotic potential of a plant refers to the
A) force exerted outward on a cell wall by the water contained in the cell.
B) surfaces of larger molecules, such as those in the cell walls, exerting an attractive force on water.
C) association between concentrations of solutes in cells and the rate of water loss.
D) ratio of carbon fixed (photosynthesis) per unit of water lost (transpiration).
C
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The aminoglycosides and tetracycline specifically target the ________ interfering with ________.
A. cell membrane enzymes; transpeptidation step of peptidoglycan synthesis B. tRNAs; protein synthesis C. topoisomerases; DNA replication D. 30s ribosomal subunit; protein synthesis
A variety of E. coli clones have been isolated, and the DNA has been extracted, digested with restriction enzymes, denatured, separated by gel electrophoresis, and transferred to nylon membrane by the Southern blot procedure. A radioactive probe is used that hybridizes with a gene of interest. The DNA corresponding to a single clone yields a single DNA band after probing the blot. Based on this
information only, A) all of the clones tested, except the one described, have the gene of interest. B) only the one clone described has the gene of interest. C) the gene of interest is located entirely on the DNA band visualized. D) the part of the gene recognized by the probe is located on the DNA band visualized. E) both choices B and D
Based on what you know about the genetic code, list one or two codons that would most likely code for the same amino acid. This is a hypothetical question; don't look at the table showing the genetic code
What will be an ideal response?
In a pedigree chart, a male showing the specific trait being studied is indicated by a
a. darkened square. b. clear square. c. darkened diamond. d. clear triangle. e. darkened circle.