What microscope is best to use to view the features of cell organelles?
A. Basic light microscope
B. Phase contrast light microscope
C. Nomarski process light microscope
D. Scanning electron microscope
E. Transmission electron microscope
Answer: E
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What describes marsupial embryos?
A. They are born fully developed. B. They are born highly underdeveloped. C. They hatch from an internal egg. D. They hatch from an externally laid egg. E. They are nourished by the placenta.
Inversions are most likely to affect an organism's phenotype
A) if one or both of the inversion's breakpoints lies within the transcribed region of a gene. B) if the inversion's breakpoints are on either side of a gene and its regulatory regions and the entire gene is reversed in the genome. C) if the inversion is pericentric. D) if the inversion is paracentric. E) if the inversion is small.
In the case of a proto-oncogene like Ras, both copies of the gene must be mutated to increase a predisposition to cancer.
Answer the following statement true (T) or false (F)
Which of the following contribute(s) to the differences between the members of the Domain Archaea and the Domain Bacteria?
A. Archaea have isopranyl glycerol ethers rather than fatty acid esters in their membrane lipids. B. Archaea differ from bacteria in their tRNA composition, ribosome structure, and antibiotic sensitivity. C. Archaea lack muramic acid. D. All of the choices are correct.