Activated Ras ____
a. activates MAP kinase (MAP K)
b. opens a calcium channel
c. triggers gene transcription
d. binds DNA
e. triggers the secretion of growth factors
ANSWER: a
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Euglena use a contractile vacuole for osmotic regulation.
Answer the following statement true (T) or false (F)
Researchers can deliver genes into plants by using ____.
A. PCR B. DNA sequencing C. electric or chemical shocks D. gel electrophoresis E. DNA segmentation
Most genes of an organism
a. show unregulated expression. b. are expressed at high levels. c. are never expressed. d. are expressed only in specific cell types. e. are expressed at low levels.
ATP is expended in which of the following processes?
A. facilitated diffusion B. diffusion C. group translocation D. active transport E. both active transport and group translocation