When macrophages migrate to the skin and remain there, they are called ________ cells.
A. GALT
B. Kupffer
C. alveolar
D. Langerhans
E. dendritic
Answer: D
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Which sequence of events CORRECTLY describes the initiation and elongation steps of translation in prokaryotic cells?
(1) initiator tRNA binds start codon on mRNA (2) small ribosomal subunit binds to mRNA (3) large ribosomal subunit binds (4) tRNA entry and peptidyl transfer reaction (5) translocation of ribosome and release of tRNA A. 1, 2, 3, 4, 5 B. 1, 2, 3, 5, 4 C. 1, 3, 2, 4, 5 D. 2, 3, 1, 5, 4 E. 2, 1, 3, 4, 5
What kind of information is stored in the DNA molecules?
What will be an ideal response?
Polyploidy means having
A. an abnormal number of two or more individual chromosomes. B. three or more sets of chromosomes. C. only one set of chromosomes. D. three or more chromosomes. E. an abnormal number of one particular chromosome.
In invertebrates with open circulatory systems, hemolymph is composed of:
A. interstitial fluid. B. plasma plus interstitial fluid. C. plasma plus intracellular fluid. D. plasma.