Southern blot is a method for ____
a. amplifying DNA segments using cycles of denaturation, annealing to primers, and DNA polymerase-directed
DNA synthesis
b. transferring DNA fragments from a gel to a membrane filter and used in hybridization experiments
c. determining the nucleotide sequence of a DNA molecule
d. producing several clones from a single cell by placing the cell in a Petri dish and allowing it to go through
several divisions
e. detecting mutant genes or differences in the pattern of gene expression
b
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Consider the phylogeny (Fig. 34.15) below. Which type of data helped the most in constructing this tree?
A. fossils from the group Glomeromycetes B. morphological characters associated with fruiting bodies C. chromosome number of the different species D. molecular sequence data E. presence or absence of a continuous dikaryotic life stage
Based on the colligative properties of water, what would happen if one were to add a solute to water?
A. The freezing point of water would decrease. B. The freezing point of water would increase. C. The boiling point of water would increase. D. Both the freezing point of water would decrease and the boiling point of water would increase. E. Nothing would change with respect to the freezing point or boiling point of water.
You are studying a set of mouse genes whose expression increases when cells are exposed to the hormone cortisol, and you believe that the same cortisol-responsive transcriptional activator regulates all of these genes
Which of the following statements below should be true if your hypothesis is correct? (a) The cortisol-responsive genes share a DNA sequence in their regulatory regions that binds the cortisol-responsive transcriptional activator. (b) The cortisol-responsive genes must all be in an operon. (c) The transcriptional regulators that bind to the regulatory regions of the cortisol-responsive genes must all be the same. (d) The cortisol-responsive genes must not be transcribed in response to other hormones.
The most commonly used practical form of energy used in cells is adenosine diphosphate.
Answer the following statement true (T) or false (F)