Phenolics act on microbes by
A) Dissolving membrane lipids
B) Denaturing proteins and disrupting cell membranes
C) Oxidizing cellular constituents
D) Precipitate cell proteins
Ans: B) Denaturing proteins and disrupting cell membranes
You might also like to view...
E. coli, a protozoan that ranges from 15 to 25 µm in diameter, can contain up to eight nuclei in mature cysts. How would the karyosome expect to appear on a stained slide?
a. Small, usually compact b. Large, usually compact c. Small, irregularly shaped d. Large, not compact
Each of the following is true regarding bacterial anoxygenic photosynthesis except
A) O2 is released. B) Hydrogen sulfide or thiosulfate can act as electron donors. C) Bacteriochlorophyll b absorbs light energy in the far red range of the light spectrum. D) Electron flow is coupled to unidirectional proton pumping across the bacterial plasma membrane. E) Following electron flow, the electron is transferred from cytochrome c to bacteriochlorophyll b.
A (missense/nonsense/silent) mutation of a gene usually produces a nonfunctional polypeptide
What will be an ideal response?
The significance of the Miller–Urey experiment is:
a. that conditions on Earth 4 billion years ago could produce RNA. b. that it is possible to produce LUCA in the laboratory. c. that conditions on Earth 4 billion years ago could produce amino acids. d. that it is possible to produce DNA under the same conditions as on Earth 4 billion years ago.