Which type of RNA is found only in eukaryotes?
A) mRNA
B) tRNA
C) rRNA
D) snRNA
E) All of these
D
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The accompanying figure shows a portion of the cell membrane. Which one of the following processes does it depict?
A) diffusion B) endocytosis C) facilitated diffusion D) gated channels E) exocytosis
Systems in which feedback from changes in one direction elicit compensatory effects in the opposite direction.
What will be an ideal response?
How does adaptive immunity differ from innate immunity?
A) Adaptive immunity is specific to each pathogen. B) Adaptive immunity generates immunological memory and its effects are immediate upon exposure to a pathogen. C) Adaptive immunity generates immunological memory and is specific to a pathogen. D) Adaptive immunity generates immunological memory. E) Adaptive immunity's effects are immediate upon exposure to a pathogen.
Which of the following statements about lymphocytes is FALSE?
A. Once they are mature, they migrate to secondary lymphoid organs. B. B and T lymphocytes can be differentiated using a bright-field light microscope. C. Lymphocytes have integral surface proteins by which they can be recognized. D. The glycoproteins on the surface of a lymphocyte are designated with the prefix CD, for "cluster of differentiation." E. Lymphocytes have different types of CD molecules in their cytoplasmic membranes.