A pathogenic bacterial species has mutated and is no longer able to synthesize a capsule. Which outcome would you predict?
A. The mutated bacteria will be protected from plasmolysis in hypertonic environments.
B. The mutated bacteria will not be able to cause disease as readily.
C. The mutated bacteria will undergo osmotic lysis in hypotonic environments.
D. The mutated bacteria will be more virulent.
Answer: B
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Which statement best describes the concept of alternation of generations?
(a) One generation of plants is skipped every other year. (b) There are two phases, a sporophyte and a gametophyte. (c) The parental generation alternates with a juvenile generation. (d) A green sporophyte phase produces food for a nongreen gametophyte.
Why do most replication errors occur?
a. DNA polymerases work very fast and mistakes are inevitable. b. DNA repair mechanisms do not work well. c. DNA replication is a slow and uncommon process. d. The hydrogen bonds between base pairs are weak. e. DNA ligase often binds incorrect sections of DNA.
Viral infection is a major cause of cancer
a. True b. False
How do segment polarity genes relate to pair-rule genes?
What will be an ideal response?