Specific proteins can be localized in the transmission electron microscope by use of
a. positive staining.
b. negative staining.
c. gold-labeled antibodies.
d. shadowing with specific metals.
Ans: d. shadowing with specific metals.
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A DUPLICATED CHROMOSOME CONSISTS OF TWO ________
Fill in the blank(s) with the appropriate word(s).
You discover a green, filamentous multicellular eukaryote growing at the edge of a pond. How could you determine if the organism is a green alga or a plant?
a. Determine if the organism protects and nourishes its embryos. b. Determine if the organism protects its zygotes. c. Examine the cell walls to see if they are composed of cellulose. d. See if the organism stores its excess carbohydrates in the form of starch. e. Test for the presence of chlorophylls
The lining of the uterus is most vascularized (thick and filled with blood vessels)
A. at the onset of menstruation. B. at the time of ovulation. C. at the end of menses. D. just before the follicle matures.
A scientist wants to perform a test that will indicate whether a nucleic acid sample is composed of RNA or DNA. Testing for the presence of which of the following is most appropriate in this situation?
A) phosphate B) nitrogen C) guanine D) uracil E) thymine