Viral nucleic acids that comprise a viral genome can be:
a. UNA only
b. RNA only
c. DNA or RNA
d. RNA or UNA
e. DNA only
Ans: c. DNA or RNA
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Resolving power
a. is the amount that an object's image is enlarged. b. is the extent to which detail in an image is preserved during the magnifying process. c. is the degree to which image details stand out against their background. d. focuses light rays emanating from an object to produce an image.
The genetic engineering of human-animal hybrids is a routine procedure related to assisted reproductive technologies
a. True b. False
Respond to the following statements with reference to the five terms below.
A. Blocks of cells in the mesoderm that develop into bones and the skeletal muscle B. Consists of an outer layer of cells, a cavity, and an inner cell mass C. This is the first primary tissue layer to form. D. It forms between the other two primary tissue layers. E. This starts the gut's inner lining.
In Drosophila, the hunchback gene encodes a protein (HB) that is required in the correct concentrations for proper segmentation of the embryo. In the zygote and embryo, the expression of hunchback is stimulated by high concentrations of Bicoid protein. You manipulate a Drosophila embryo to have high Bicoid concentrations throughout. Which of the following would occur?
A. The HB protein would be produced throughout the entire embryo. B. The HB protein would not be produced at all. C. The HB protein would be produced throughout the entire embryo and segmentation would not occur correctly. D. The HB protein would not be produced at all and segmentation would not occur correctly. E. Segmentation would not occur correctly.