Bacteria that are able to grow in humans and cause disease have likely evolved to be
A) psychrophiles.
B) mesophiles.
C) thermophiles.
D) hyperthermophiles.
Answer: B
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The enzyme lysozyme offers protection from some ____ by breaking down their ____
a. viruses; protein coat b. bacteria; cell walls c. viruses; envelopes d. bacteria; DNA e. viruses and bacteria; nucleic acids
The c-Flip protein, a protein involved in mediating the cell-death pathway, comes in two forms: long (c-FLIPL) and short (c-FLIPS). Both forms appear to be involved in controlled apoptosis in normal cells. However, in colon cancer, the expression of c-FLIPL is associated with what notable characteristic?
a. death of cells surrounding the dying cell b. lesion formation and buildup of extracellular waste products c. increased cell growth d. replication of the genetic material without progression through mitosis
A chlorine atom has 17 protons and 18 neutrons. What is its atomic mass?
a. 1 amu b. 17 amu c. 18 amu d. 35 amu e. 306 amu
The size and shape of a colony is not useful for identification of a microorganism because most microorganisms produce colonies that are indistinguishable from one another.
Answer the following statement true (T) or false (F)