Differentiate among the following types of genes: tumor-suppressor gene, proto-oncogene, and oncogene

What will be an ideal response?


Tumor-suppressor genes normally function to inactivate or repress cell division. Proto-oncogenes normally function to promote cell division, whereas oncogenes are mutant forms of proto-oncogenes.

Biology & Microbiology

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Which of the following is NOT a source of

heritable variation in traits among individuals of a population?

a. mutation b. crossing over c. independent assortment d. fertilization e. mitosis

Biology & Microbiology

The first life-related and carbon-based

molecule was synthesized in vitro by a German chemist. What was that molecule?

a. starch b. fructose c. acetaldehyde d. urea e. rubisco

Biology & Microbiology

Which of the following substances is NOT filtered from the bloodstream?

a. water b. plasma protein c. urea d. glucose e. sodium

Biology & Microbiology

All of the following are ways in which a mild fever participates as part of the body's second line of defense and aids the body EXCEPT

A) increasing the metabolic rate of body cells. B) speeding up defense reactions. C) increasing the rate of tissue repair. D) creating an inhospitable internal environment for pathogenic bacteria. E) enhancing the secretion of antibodies by plasma cells.

Biology & Microbiology