Which of the following statements is true regarding microbial mats?
A. They contain archaeons.
B. They contain oxygenic photosynthetic
bacteria.
C. They contain anoxygenic photosynthetic
bacteria.
D. Sunlight does not reach microbial mat
levels inhabited by chemoautotrophs.
E. All of these answer options are correct.
E
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The two steps of transcription followed by
translation a. explain the structural complexity of genes. b. describe the flow of genetic information. c. are based upon the role of proteins in controlling life. d. do not explain how genes function. e. explain evolution in terms of molecular biology.
In which type of bacteria is the outermost layer of the cell a thick wall of peptidoglycan?
A. Proteobacteria B. Cyanobacteria C. Gram-positive bacteria D. Gram-negative bacteria E. Chlamydias
Microbial proteases are used
A) in the production of linen. B) as preservatives. C) in spot removers. D) as a component of fabric dyes. E) to biodegrade plastics.
Which of the following enzymes is found ONLY in hyperthermophiles?
a. topoisomerase I b. reverse DNA gyrase c. helicase d. DNA polymerase III