Atoms are composed of a central nucleus which is surrounded by which orbiting particles?

a. Neutrons
b. Electrons
c. Protons
d. Ions


Ans: b. Electrons

Biology & Microbiology

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Proteins in thermophiles must be stabilized by van der Waals forces, because hydrogen bonds cannot be maintained at

high temperatures

high temperatures

Biology & Microbiology

A solution with a pH of 3

A) is more alkaline than a solution with a pH of 2. B) has a higher concentration of OH- than a solution with a pH of 4. C) is neutral. D) is more acidic than a solution with a pH of 3.5.

Biology & Microbiology

Which of the following are prokaryotic organisms?

A. Animals B. Bacteria C. Fungi D. Plants

Biology & Microbiology

Dental remains from australopithecines suggest that they had a diet similar to that of modern chimpanzees.

a. true b. false

Biology & Microbiology