In the life cycle of a fern, the large fern plant that we normally see is the
A) gametophyte.
B) sporophyte.
C) spore.
D) zygote.
E) gamete.
B
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Which of the following diseases causes an influenza-like illness that can progress to include pneumonia?
A) malaria B) Q fever C) typhus D) Lyme disease
What is the advantage of the proofreading function of DNA polymerase?
A. All DNA mutations can be detected and repaired during DNA replication. B. DNA polymerase is always present in the nucleus and can repair all mutations when they occur. C. DNA polymerase can be recruited to recently mutated sites to repair mutations. D. DNA polymerase can repair most mutations as they occur during DNA replication.
Which of the following is false regarding NK cells?
a. Helper T cells stimulate them to divide. b. They attack cells tagged for destruction by antibodies. c. They kill cells with normal MHC markers. d. They detect stress markers on cancerous cells. e. They detect and destroy cells with altered MHC markers.
Which of the following statements about generalized transduction is false?
A. Two recombination events are necessary to integrate the transferred DNA during generalized transduction. B. Generalized transduction always involves lytic phage. C. Genes that are close together on the bacterial chromosome will have a relatively large cotransduction frequency. D. "Head full" packaging always places only phage DNA into the phage head during phage packaging in generalized transduction. E. Generalized transduction can be used to map bacterial genes.