As compared to F-negative cells, F-positive cells are at a disadvantage because
a. they may "waste" conjugation by conjugating with other F-positive cells.
b. they have greater susceptibility to phage infection.
c. cell division is prolonged.
d. the replication process renders them more susceptible to mutation.
e. they have a more fragile cell wall.
Ans: b
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(a) one. (b) two. (c) three. (d) four.
Which of the following is not considered a photosynthetic organism, and so would not remove atmospheric CO2?
A. kelp B. elm tree C. human D. moss E. phytoplankton
The transforming principle that Griffith described from his work with Streptococcus pneumoniae
bacteria turned out to be ____.
a. a polysaccharide capsule b. a phospholipid c. protein d. RNA e. DNA
Which is the correct pathway of a protein through a cell as it is being made?
A) Nucleus, ribosome, Golgi apparatus B) Golgi apparatus, ribosome, rough endoplasmic reticulum C) Nucleus, smooth endoplasmic reticulum, Golgi apparatus D) Golgi apparatus, ribosome, mitochondria