Explain how epigenetics works.

What will be an ideal response?


Epigenetics works by blocking a cell's ability to read certain genes. A gene can be blocked in the off position by methylation.

Biology & Microbiology

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Which of the following is (are) used by microorganisms to become resistant to a particular drug?

A. Exclusion of the drug from the cell B. Enzymatic inactivation of the drug C. An alternate metabolic pathway that bypasses the drug-sensitive step D. All of the choices are correct.

Biology & Microbiology

Mercury can serve as a transcriptional activator in the regulation of certain genes

Indicate whether the statement is true or false.

Biology & Microbiology

A grasshopper belongs in the Ecdysozoa clade because of its ability to:

a. molt. b. develop. c. live on land. d. reproduce sexually. e. maintain homeostasis.

Biology & Microbiology

A(n) ________ organism require(s) oxygen for growth

A) anaerobic B) facultative anaerobic C) aerotolerant D) obligate aerobic E) aerotolerant and an anaerobic

Biology & Microbiology