How is it that the cells in different body tissues are able to perform different functions?
A) The cells exhibit different patterns of gene expression.
B) Different chromosomes have been inactivated in different cells.
C) The cells contain different genes.
D) The mutations that have accumulated in the cells of the different tissues control functions.
A
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What key words does the question contain and what do they mean?
What will be an ideal response?
During sexual reproduction, Saccharomyces cerevisiae produces blastospores.
Answer the following statement true (T) or false (F)
At the end of metaphase I, separate
a. homologous chromosomes b. haploid chromatids c. sister chromatids d. centrioles e. germ cells
The growth factor RGF stimulates proliferation of cultured rat cells. The receptor that binds RGF is a receptor tyrosine kinase called RGFR. Which of the following types of alteration would be most likely to prevent receptor dimerization?
(a) a mutation that increases the affinity of RGFR for RGF (b) a mutation that prevents RGFR from binding to RGF (c) changing the tyrosines that are normally phosphorylated on RGFR dimerization to alanines (d) changing the tyrosines that are normally phosphorylated on RGFR dimerization to glutamic acid