Which of the following is required for formation of the open complex of replication initiation?
A. binding of DnaB helicase to single strands of the replication bubble
B. binding of DnaC to the four 9-mer consensus sequences, which destabilizes the AT-rich repeat sequences
C. binding of DnaA to the four 9-mer consensus sequences, which destabilizes the AT-rich repeat sequences
D. DnaA/DnaC/ATP complex loads DnaA onto the origin and ATP hydrolysis allows release of the DnaC protein
E. oligomerization of the HU protein upon binding the origin, and wraping of the DNA around the oligomer
C
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You are studying reproduction in a species of frog. Two gametes that are diploid join to form a viable zygote (F1). If the F1 mates with one of the parents, will there be viable offspring?
A. yes B. no
Glandular root-hairs of tomato plants secrete
aromatic chemicals to deter plant eating insects. What do these structures secrete from the cannabis plant? a. THC b. hydrogen peroxide c. latex d. phloem fluid e. sharp edged crystals
Four of the five systems listed below are produced
by the same germ layer. Select the exception. a. nervous b. muscle c. circulatory d. reproductive e. excretory
Epstein-Barr virus has all of the following characteristics except.
A) is only found to infect 5% of the world's population. B) is transmitted by direct,oral contact and saliva. C) produces sudden leukocytosis. D) has a 30-50 day incubation E) can be transmitted by contaminated blood transfusions and organ transplants.