____ are involved in the regulation of gene
expression.
a. Transcription factors
b. Translation factors
c. Transposable elements
d. Metylation
e. Phosphorylation
A
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A population of T cells has been stimulated to proliferate in response to a particular antigen. A sample of 1000 cells is examined microscopically, revealing that 200 of these cells are in the various stages of mitosis. Of the remaining 800 in interphase, 400 have x amount of DNA, 250 have 2x, and the remaining 150 have amounts somewhere between x and 2x. Additional analysis reveals that the G2
phase of the cell cycle lasts 2 hours. What is the total length of the cell cycle? A) 2.5 hours B) 4 hours C) 6.4 hours D) 8 hours E) 13.3 hours
Most of the plant body is composed of
a. dermal tissue. b. root tissue. c. ground tissue. d. vascular tissue. e. cork tissue.
An atom having a filled valence shell is stable and unreactive
__________________ Indicate whether the statement is true or false.
What are the functions of the 5' cap and poly(A ) tail of mature mRNAs in eukaryotes?
What will be an ideal response?