A virus contains _______ as its genetic material
Fill in the blank(s) with the appropriate word(s).
DNA or RNA
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Which of the following is evidence supporting the Lyon hypothesis of X inactivation?
A. Female mammals that are heterozygous for X-linked traits are phenotypic mosaics. B. A highly condensed structure is consistently observed in female cells, but not in normal male cells. C. A female cat that is homozygous for coat color cannot have a calico phenotype. D. Calico patterns of coat color are never exactly the same. E. All of these are correct
Molecules brought into the cell from the exterior are placed into vesicles for routing to other locations
such as ____.
a. the nucleus b. lysosomes c. mitochondria d. ribosomes e. cholorplasts
Which of the following is mostly performed by bacteria living within the roots of plants in the legume family?
a. nitrification b. ammonification c. nitrogen cycling d. nitrogen fixation e. nitrogen assimilation
Which of the following best describes the basis for separation of DNA fragments during agarose gel electrophoresis?
A. The smallest fragments will migrate fastest. B. The fragments with the highest percentage of A and T will migrate fastest. C. The fragments with the highest percentage of G and C will migrate fastest. D. The largest fragments will migrate fastest.