The first antibiotic to be utilized was

A) vancomycin.
B) quinine.
C) penicillin.
D) salvarsan.
E) sulfonamides.


Ans: C) penicillin.

Biology & Microbiology

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

1. The covalent bonds that hold monosaccharides together in a polysaccharide are called glycosidic bonds. 2. A DNA nucleotide consists of the following three parts: a nitrogenous base, ribose, and a phosphate group. 3. The waxes in the cell walls of Mycobacterium tuberculosis cause this organism to be acid-fast. 4. The basic structure of a cell membrane is a lipid bilayer. 5. DNA polymerase is the only enzyme required for DNA replication.

Biology & Microbiology

Pioneering species __________

a. migrate seasonally b. tend to have fast reproductive rates c. grow slowly in disturbed areas d. migrate seasonally and tend to have fast reproductive rates

Biology & Microbiology

Most polymorphisms do not result in a phenotypic difference because they are typically

A) nonsense mutations. B) either missense or neutral mutations. C) either silent mutations or are in non-coding regions. D) either missense mutations or are in promoter regions.

Biology & Microbiology

In green plants, which photosystem absorbs photons to excite electrons in the reaction center?

A. Photosystem I, II and III B. Photosystem II C. Photosystem III D. Photosystem I E. Photosystem I and II

Biology & Microbiology