Besides sickle cell anemia, which one is associated with abnormal hemoglobin production?
a. aplastic
b. pernicious anemia
c. hemolytic anemia
d. thalassemia
e. iron-deficiency anemia
D
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Which of the following are examples of amplification of a hormone signal?
I) Epinephrine initiates an enzyme cascade. II) Steroids bind hormone-response elements in the cell and initiate transcription of many genes. III) A quantity of 0.09 mg of growth hormone leads to a 10,000-mg weight gain in a cow. IV) Different cell types have different receptors capable of binding the same hormone. A) only I and III B) only II and IV C) only I, II, and III D) only II and III E) I, II, III, and IV
The genetic material in a virus is technically called a plasmid
Indicate whether the statement is true or false.
In relation to genetic recombination, what does the term “parental types” mean?
a. progeny that exhibit the same traits as the parents b. progeny with mutations resulting in birth defects not seen in the parents c. progeny that exhibit the same allelic combinations as the parents d. progeny that do not survive to parenthood
What is the effect of the ?32 allele of CCR5 on HIV binding?
A) appears on the surface of CD4 T cells, but the HIV virion is unable to infect the host cell B) does not appear on the surface of CD4 T cells C) appears on the surface of the CD4 T cells and inactivates the virion upon binding D) interferes with binding of the virion to the CD4 receptor protein E) appears on the surface of the CD4 T cells and causes the virion to lyse upon binding