What is the item labeled “B” in the accompanying figure?
a. The enzyme
b. The substrate
c. The active site
d. The transition state
e. The product
ANSWER: b
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The morphology of this pollen grain indicates that it was made by a(n)
1.fern
2.magnoliid
3.monocot
4.eudicot
Plasma cells come from
a. T cells. b. dendritic cells. c. B cells. d. macrophages. e. monocytes.
Which of the following statements is incorrect regarding the effects of rubella and rubeola in different populations?
A. Infection during pregnancy with either of these viruses can cause serious injury to the fetus. B. Congenital rubella is least serious if it is contracted during the final trimester of pregnancy. C. A six-year-old child infected with rubeola will experience fever, cough, and a rash, and barring complications, should recover in a few weeks. D. A 30-year-old man infected with rubella will experience severe symptoms and require constant medical attention for several weeks.
What happens during Anaphase B?
A. The APC/C gets activated for the first time. B. The spindle apparatus disassembles. C. Kinetochores are pulled toward the poles. D. The nuclear envelope reforms. E. The spindle poles move apart.