In which phase does each sister chromatid, now a chromosome move to opposite poles?
What will be an ideal response?
Anaphase II
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Antiparallelism means that
A) the two strands of a DNA molecule run in opposite directions. B) the DNA double helix twists first one way, then the other. C) the DNA bases are sometimes on the outside of the molecule. D) the DNA molecule cannot dissolve in water.
A specimen has been prepared for viewing with a transmission electron microscope, using uranyl acetate as a negative stain. The area stained by the uranyl acetate will be ________ electron dense compared to specimen itself.
A. more B. equally C. less
Cartilaginous fishes retain __________ in their body,
so they do not lose or gain water by osmosis. Fill in the blank(s) with the appropriate word(s).
For gas exchange to occur quickly and efficiently, which type of epithelium must be present on all
respiratory surfaces? a. pseudostratified columnar epithelium b. simple squamous epithelium c. ciliated columnar epithelium d. stratified squamous epithelium e. ciliated squamous epithelium