Which of the following is/are obligate intracellular parasites?
A. Chlamydia and Rickettsia
B. E. coli and Pseudomonas
C. Mycoplasma
D. Treponema pallidum
A
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Select all of the following ways by which skeletal muscles protect the body.
A goose that was hatched by a swan grows up to unsuccessfully court swans. This is an example of
A. anthropomorphism. B. classical conditioning. C. imprinting. D. insight learning.
Enhancers can be identified by.
a. cloning a region of DNA with the putative enhancer in a reporter plasmid and demonstrating an increase in gene expression when the construct is introduced into a eukaryotic cell.
b. sequence comparison with promoter sequences that are already known.
c. introducing two separate pieces of DNA into a eukaryotic cell. One is a fragment of DNA with the putative enhancer and the other is a plasmid that contains a reporter gene.
d. cloning the putative enhancer into a plasmid and measuring the level of reporter gene expression in a prokaryotic cell.
Symptoms of infectious mononucleosis include
A. sore throat, fever, cervical lymphadenopathy, and splenomegaly. B. fever, severe diarrhea, pneumonitis, hepatitis, and retinitis. C. fever and pocks on skin. D. vesicular lesions in oral mucosa.