Passive immunity differs from active immunity in that passive immunity
A) causes long-term immunity.
B) involves the administration of preformed antibodies.
C) results in the production of antibodies.
D) is not effective against a preexisting condition.
E) results in the production of memory cells.
B
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Which of the following describes an accurate order of events in translation?
A. Ribosomal translocation occurs before the first aminoacyl-tRNA molecule binds to the small subunit. B. Initiation of translation occurs only after the small subunit dissociates from the mRNA. C. The large subunit of the ribosome binds the mRNA before the small subunit. D. The first aminoacyl-tRNA molecule binds to the small subunit before the large subunit binds.
Darwin’s experiments on phototropism illustrated that
a. plant stems bend away from bright lights. b. signals from plant roots control phototropism. c. an opaque cap placed over a shoot tip will cause a plant to bend toward light, but will inhibit growth. d. a translucent cap placed over a shoot tip will cause a plant to bend toward light, but will inhibit growth. e. a translucent cap placed over a shoot tip will cause a plant to both grow and bend toward light.
Using the information in the accompanying figure, explain what short polypeptide is produced from the DNA segment
AAG GGC CTT. Include in your answer the role of mRNA and tRNA. What will be an ideal response?
What are some of the possible factors associated with aging?
What will be an ideal response?