Platelet-derived growth factor (PDGF) is a signaling molecule that functions in which of the following types of cell signaling?
A. juxtacrine
B. paracrine
C. autocrine
D. endocrine
E. All of these choices are correct.
B
Biology & Microbiology
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Caffeine from the coffee plant is stored in
a. central vacuoles. b. chloroplasts. c. chromoplasts. d. leucoplasts.
Biology & Microbiology
RNA can be used as a template for the
production of DNA through the action of a. DNA polymerase. b. RNA polymerase. c. reverse transcriptase. d. ligase. e. restriction endonuclease
Biology & Microbiology
Name the two main clades of Rhizaria, then list one way of distinguishing one of those clades from the
other. What will be an ideal response?
Biology & Microbiology
Which of the following is regulated by the kidneys?
A. blood pressure B. plasma sodium levels C. blood volume D. blood pH E. All of the choices are correct.
Biology & Microbiology