Heterochromatin is associated with

A) differential gene expression.
B) gene silencing.
C) mRNA translation.
D) heterozygotes.
E) A, B, and C only


B

Biology & Microbiology

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Secondary metabolites that function to protect plants from viral, fungal and bacterial pathogens are

a. systemins. b. phytoalexins. c. PR proteins. d. R genes. e. heat-shock proteins.

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Which of the following molecules are signal molecules for a receptor tyrosine kinase?

1.insulin 2.epidermal growth factor 3.nerve growth factor 4.platelet derived growth factor 5.All of the choices are correct.

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In ______________________________, radioactive materials are implanted into the tissues to be treated.

Fill in the blank(s) with the appropriate word(s).

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Cryptococcosis can include

A) Bone infection B) Pulmonary infection C) Meningitis D) Septicemia E) All of these choices are correct

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