What region in eukaryotic genes usually contains the majority of regulatory elements?
A. 0 to 50
B. -50 to 0
C. -50 to -100
D. -100 to -150
C
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During HIV reproduction, spike glycoproteins
A. do not enter the cell with the virus. B. are released into the cytoplasm by cellular enzymes. C. are embedded in the infected cell membrane. D. are assembled into the virus along with reverse transcriptase. E. are embedded in the viral capsid.
Which of the following is true of X chromosome expression in female mammals? a. All genes are expressed
b. Both X chromosomes are activated. c. The Y chromosome is suppressed. d. One X chromosome is inactivated.
After fertilization, the zygote grows through a series of cell divisions called cleavage. The embryo does not grow in size although the cell number is increasing. How does this happen?
What will be an ideal response?
It can take up to __________ days after marijuana
use before the urine tests negative for the drug. a. 3 b. 5 c. 7 d. 10 e. 14