In the Hershey-Chase experiments, the radioactive tracers 32P and 35S were used to track DNA and protein,
respectively, because _____.
a. bacterial DNA contains sulfur and viral DNA contains phosphorus
b. viral DNA contains sulfur and bacterial DNA contains phosphorus
c. only DNA contains phosphorus and only protein contains sulfur
d. DNA has more sulfur than protein, and protein has more phosphorus than DNA
e. protein has more sulfur than DNA, and DNA has more phosphorus than protein
ANSWER: e
You might also like to view...
In M. xanthus, ________ motility is a kind of twitching that is governed by the production of retractable type IV pili, only observed when cells are in a group.
Fill in the blank(s) with the appropriate word(s).
Among mammals, the home range is usually larger for
A) carnivorous species than for herbivorous species of the same body size. B) females than males of the same species. C) immatures than for adults of the same species. D) smaller species than for larger species.
African sleeping sickness is caused by Trypanosoma brucei, a flagellated protist with a kinetoplast. Which of the following diseases is caused by a pathogen classified in the same supergroup of protists as T. brucei?
A. amoebic dysentery B. giardiasis C. malaria D. dinoflagellate toxin-induced nervous disorders
The respiratory system is unlike the digestive system in that air flows into and out of the same opening.
Answer the following statement true (T) or false (F)