Which characteristic is associated with cancerous cells?

a. well-differentiated
b. large nucleus compared to cytoplasm
c. always encapsulated
d. abnormally slow growth
e. symmetrical growth


ANSWER: b

Biology & Microbiology

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A segment of DNA that specifies a sequence of amino acids in a polypeptide is called a(n)

a. codon. b. intron. c. messenger. d. gene. e. enzyme

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Why does sickle-cell hemoglobin (HbS) migrate slower than normal hemoglobin (HbA) during gel electrophoresis?

What will be an ideal response?

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Matter is composed of

A. atoms. B. mass. C. molecules. D. energy.

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Triclosan is a common antibiotic used in antiperspirants, toothpastes, and antibacterial soaps. You are a doctor studying the evolution of bacterial resistance to triclosan. You need to find a population of nonresistant bacteria

Where should you look? A) In areas where triclosan-containing products are used frequently B) In areas where these triclosan-containing products have not been used C) In areas where bacteria are usually not found D) In areas with low percentages of bacterial infection

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