Which of the following is not true about the termination of replication in bacteria?
A. Termination occurs at sequences called Ter sites.
B. Binding of Tus proteins to Ter sites blocks the advance of the replication fork by interacting with DnaB helicase.
C. There are two clusters of Ter sites oriented in opposite directions.
D. Tus-Ter complex activity is polar; the replication forks can pass through the first set but are blocked by the second.
E. Replication forks can proceed past both Tus-Ter clusters, which causes problems when it runs into RNA polymerase head first.
E
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Match the following items with the correct phrase.
_______1. Has caused massive fish kills along the east coast of the United States. _______2. Associated with red tides and paralytic shellfish poisoning. _______3. The source of agar. _______4. The only alga known to cause an infectious disease. _______5. Classified as an alga by some taxonomists and a protozoan by others. a. Prototheca b. Pfiesteria piscicida c. dinoflagellates d. a red marine alga e. Euglena
After a meal,
a. ATP production slows. b. blood glucose levels remain constant. c. insulin levels rise. d. glycogen is used. e. glucagon levels rise
Four of the five elements listed below are elements
whose symptoms of deficiency include chlorosis. Select the exception. a. phosphorus b. iron c. chlorine d. copper e. magnesium
The terms "dorsal" and "oral" are synonyms.
Answer the following statement true (T) or false (F)