During lytic replication of bacteriophage, which process uses factors from the host cell, rather than coded by the viral genome?
A) proteins to copy the viral genome
B) enzymes which transcribe and translate viral genes
C) proteins to build new phage particles
D) lysozyme to rupture the host cell
E) DNAases to break up the host cell genome
Answer: B
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The convergence in external morphology of sharks, penguins, and porpoises is attributed to
a. reduced genetic variability in these groups. b. selection pressures that are common to these groups. c. reproductive isolation of these groups. d. identical genes in all three groups. e. use and disuse of the limbs.
A central vacuole
a. is found only in plant cells. b. may take up between 50% and 90% of the cell's interior. c. regulates water balance. d. is all of the above.
Which of the following parts of a brown alga do(es)
NOT have a counterpart in land plants? a. blade b. stipe c. float d. holdfast e. all of these
The chordate nerve cord is hollow and located ventrally
____________________ Indicate whether the statement is true or false.