A ________ is a polysaccharide layer that lies outside the cell wall and is not easily removed.
Fill in the blank(s) with the appropriate word(s).
capsule
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A cephalopod's tentacles are modified from its _____
A) mantle B) visceral mass C) foot D) shell E) radula
H. influenzae can be distinguished from H. aegyptius by its _____ test for _____
a. negative; sucrose fermentation b. negative; lactose fermentation c. positive; catalase d. positive; xylose fermentation
Frederick Griffith was a microbiologist who observed that
A) DNA contains nitrogen and phosphorus. B) proteases disrupt transformation from nonvirulence to virulence. C) DNA from heat-killed viruses transforms virulent viruses. D) nonvirulent bacteria become virulent when mixed with heat-killed virulent bacteria.
The significance of one new and one parental strand in each new DNA molecule would be that:
1.New strands are more susceptible to mutation.
2.DNA polymerase will only work on a parental strand.
3.Having an original strand is needed to prevent errors during the replication process.
4.Strands can only pair with existing strands.