Which of the following statements is TRUE about
anaphase?
a. When sister chromatids separate, each is called a
chromosome.
b. Motor proteins drag chromosomes towards the
poles.
c. Some microtubules slide past each other, pushing
the poles farther apart.
d. Kinetochore microtubules shrink at both ends.
e. All of these are true.
Answer: e
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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
The glandular organ represented by the letter
"A" in the above figure is the ____ gland that makes/performs ____. a. hypothalamus; antidiuretic hormone b. pituitary; follicle stimulating hormone production c. adrenal gland; epinephrine d. pancreas; insulin e. none of these
The ________ gland lies in the center of the brain and contains secretory cells that produce melatonin
Fill in the blank(s) with correct word
According to the figure, what is the only hormone that doesn't peak during ovulation?
A. All female reproductive hormones peak at ovulation B. Progesterone C. Estrogen D. FSH E. LH