The cell that participates in both the innate and adaptive defense by presenting antigens to activate helper T cells is the
A. B cell.
B. T cell.
C. macrophage.
D. plasma cell.
E. chondrocyte.
C. macrophage.
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In transcription, one DNA strand is transcribed into a(n) ________ RNA strand, which is translated into protein.
A) ribosomal B) transfer C) messenger D) anticodon
Epigenetic effects are the result of:
a. a change in the RNA sequence. b. DNA methylation. c. RNA methylation. d. a change in the DNA sequence. e. all of these option
Which of the following statements is true?
A) Large patches of habitat usually contain fewer species than small patches. B) Large animals usually have larger home ranges than smaller animals. C) Carnivore home ranges are usually smaller than herbivore home ranges. D) Small species are usually limited to small habitat patches.
The point of constriction on chromosomes that contains certain repeated DNA sequences that bind specific proteins is called:
A. The centrosome B. The kinetochore C. The cohesin complex D. The centromere E. The centriole