Host range is limited by the
A. type of nucleic acid in the virus.
B. size of the host cell.
C. age of the host cell.
D. type of host cell receptors on cell membrane.
Answer: D
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What is the correct order of structures in the electrical excitation pathway that generates a normal heartbeat?
Refer to the diagram below.
A. 1, 2, 3, 4, 5, 6
B. 3, 6, 2, 4, 1, 5
C. 6, 3, 2, 4, 5, 1
D. 1, 5, 4, 2, 3, 6
E. 2, 5, 1, 4, 6, 3
F. 3, 2, 6, 4, 5, 1
Segmentation is important in annelids as an aid in:
A. respiration. B. reproduction. C. movement. D. sensation. E. eating
The pancreas is involved in the digestion of _____. I) protein II) fat III) nucleic acids IV) carbohydrates
A) I and III B) I, II, and IV C) II, III, and IV D) I, II, III, and IV
If bacterial chromosomes are catenated (interlinked) following replication, __________ is/are required to separate them
a. a site-specific recombination system b. restriction enzymes c. a helicase d. topoisomerases e. generalized intramolecular recombination