Outline the four characteristics of cancer

What will be an ideal response?


The four characteristics of cancer are that (1) it begins in a single cell; (2) a cell becomes cancerous after it accumulates a number of specific mutations over a period of time; (3) once formed, cancer cells divide continuously, mutations accumulate, and the cancer may grow more aggressive over time; and (4) cancer cells are invasive and can infiltrate surrounding tissues and detach from the primary tumor, move to other sites in the body, and form new malignant tumors.

Biology & Microbiology

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At which stage is the foreign gene introduced into the developing embryo?

a. blastocyst, via a transgenic cell b. egg, via direct microinjection of the new DNA c. sperm, via direct microinjection of the new DNA d. in cell culture, prior to fertilization e. it all depends on the method the particular researcher prefers.

Biology & Microbiology

When the hormone epinephrine binds to receptors on the surface of a heart muscle cell, a new molecule, called cyclic AMP, is produced. Cyclic AMP then causes the heart muscle cells to contract more strongly, increasing blood flow throughout the body

In this example, cyclic AMP is acting as a(n) A) second messenger. B) intercellular enzyme. C) hormone. D) energy carrier. E) target cell.

Biology & Microbiology

The most humanlike australopith discovered so far is ____.

A. Australopithecus afarensis B. Australopithecus africanus C. Australopithecus ramidus D. Australopithecus sediba E. Australopithecus kadabba

Biology & Microbiology

Viruses are self-replicating, but the replication is much faster in a host cell.

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

Biology & Microbiology