Host range is limited by the
A. type of host cell receptors on cell membrane.
B. size of the host cell.
C. age of the host cell.
D. type of nucleic acid in the virus.
E. All of these choices are correct.
Answer: A
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What type of inheritance pattern does Hemophilia A exhibit?
a. Autosomal recessive b. Autosomal dominant c. X-linked recessive
With regard to the lac operon, which of the following is false under conditions of low (or no) glucose?
a) the RNA polymerase cannot transcribe structural genes b) The repressor is bound to the operator c) Lactose is not bound to the repressor d) RNA polymerase can bind to the promoter e) there is a high amount of glucose in your media
When cloning DNA into bacteria,
a. the DNA sequence is inserted into a plasmid. b. the DNA sequence is inserted into the bacterial chromosome. c. the linear DNA sequence is circularized, thus generating a plasmid. d. the new DNA is directly introduced into the bacterial cell. e. either the approach in b or c is used; the choice depends on the type of bacteria.
Reptiles, including birds, belong to one major lineage of amniotes, and _____ belong to another
a. sharks c. mammals b. frogs and toads d. slamanders