Recent studies on plants with mutations in certain cytokinin receptors show that these plants have strongly enhanced root systems. These data suggest that while cytokinins have a positive role in shoot growth, they may actually work to inhibit root growth. Do you think these mutant plants could still be used in plant tissue culture?
A. Yes, but they may develop bigger roots.
B. Yes, but they may have smaller roots.
C. No, because they can't form a callus.
D. No, because they won't be able to respond to auxin.
Answer: A
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Which of the following is an advantage of cDNA libraries?
A. cDNA libraries are easy to make. B. cDNA libraries utilize genomic DNA, which is easy to obtain. C. cDNA lacks introns and therefore reflects all the genes expressed by a particular tissue or organism. D. cDNA lacks exons. E. cDNA libraries are more stable than other DNA libraries.
When cloning DNA into bacteria, the ____
a. DNA sequence is inserted into a plasmid b. DNA sequence is inserted into the bacterial chromosome c. linear DNA sequence is circularized, thus generating a plasmid d. new DNA is directly introduced into the bacterial cell e. approach depends on the species of host bacteria used in the experiment
The reason humans inhale oxygen is so that it can be used for:
What will be an ideal response?
Which of the following is true regarding cell
membrane proteins? a. All are free to move laterally through the lipid bilayer. b. All are rigidly positioned. c. Some are tethered by cytoskeletal elements. d. Some form complexes. e. Some are tethered by cytoskeletal elements, and some form complexes.