A multigene family is composed of _____
A) multiple genes whose products must be coordinately expressed
B) genes whose sequences are very similar and that probably arose by duplication
C) a gene whose exons can be spliced in a number of different ways
D) a highly conserved gene found in a number of different species
B
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How are plasmids different than chromosomes?
A) Plasmids are always small, linear pieces of DNA. B) Plasmids are composed of single-stranded DNA. C) Plasmids contain genes that are NOT essential for cellular growth and replication. D) Plasmids carry unimportant genes that are of little significance for the ecology and metabolism of an organism.
The causative agent of Hansen's disease is
A) Mycobacterium marinum. B) Mycobacterium ulcerans. C) Mycobacterium hansen. D) Mycobacterium leprae.
Bacteriophages are viruses that ____
a. catalyze bacterial reproduction b. attach to bacterial cells and extract bacterial DNA c. interfere with DNA replication in the cytoplasm of cells d. produce histones e. infect and copy themselves inside bacterial cells
Differentiate between conidia and spores.
What will be an ideal response?