What is the primary function of a cellular membrane?

a. recognizing other cells as being "like"
b. controlling the transport of substances into and out of cells
c. recognizing chemical signals from other cells
d. cell-cell binding


Ans: b. controlling the transport of substances into and out of cells

Biology & Microbiology

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Despite acidic conditions, some microorganisms have been found residing within the human stomach.

Answer the following statement true (T) or false (F)

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Before the advent of biotechnology, diabetics would use insulin harvested from cows. Now they receive human insulin produced through ________.

A. gel electrophoresis B. gene therapy C. PCR D. recombinant DNA technology

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The increased concentration of toxins as they move up through the food chain is called ____

a. biological magnification b. eutrophication c. biological accumulation d. deposition e. desertification

Biology & Microbiology

Which of the following would be considered appropriate exercise for a seriously obese individual to help lose weight?

What will be an ideal response?

Biology & Microbiology