FISH can be used to determine the ________
A) difference in lengths between two fragments of DNA
B) chromosomal location of specific genetic information
C) locations of major and minor grooves in a double helix
D) difference between A-form and B-form DNAs
E) melting temperature of a fragment of DNA
Answer: B
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Answer the following statements true (T) or false (F)
1. If a cell contains 20 units of DNA during G2, it will have 40 units of DNA during S. 2. During prometaphase, the sister chromatids organize into a single row in the center of the cell. 3. A cell undergoing meiosis that contains sister chromatids may be either haploid or diploid. 4. One major difference between metaphase I and metaphase II is the presence or absence of bivalents. 5. Sexual life cycles include both haploid and diploid stages.
Smooth muscle cells in the airways relax while those in the blood vessels contract in response to the hormone epinephrine. What would you expect to be different in these two types of cells exposed to epinephrine?
A. Types of proteins expressed. B. Presence of epinephrine receptors. C. Exposure to epinephrine released by neighboring cells. D. Rate of metabolism. E. Activation of protein kinases.
Radially symmetrical animals have loose meshes of neurons that are called ____
a. nerve nets b. brain nets c. ganglia nets d. nerve cords e. cephalization nets
. The substance that typically provides rigidity to fungal cell walls, and is found in some animals, is
____.
a. lignin b. cellulose c. starch d. collagen e. chitin