Why is it hard to classify protists?
A. Because they differ in their complexity, some being unicellular, some being multicellular
B. Because they come from such in such a wide variety of size and shape
C. Because they differ in their nutrition and energy use
D. All of the above are reasons why protists remain hard to classify
Answer: D
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Which of the following components of PCR ensures amplification of the target DNA sequence only, despite the presence of many other DNA sequences?
A. Polymerases B. Primers C. dNTPs D. High temperatures
Since the whole genome sequencing method eliminates the need for constructing physical and genetic maps, this method is _____
a. superior for linkage studies b. the only sequencing method currently used in genomics research c. faster than the map-based sequencing method d. more accurate than the map-based sequencing method e. less accurate than the map-based sequencing method
The lac operon
A. is an example of negative control. B. is affected by catabolite repression. C. produces lactose. D. is an example of a regulon. E. is an example of negative control AND is affected by catabolite repression.
Which of the following pairs is incorrectly matched?
A. macrophage; class II MHC protein B. B cell; class I MHC protein C. B cell; IL-2 secretion D. helper T cell; CD4 E. cytotoxic T cell; class I MHC protein