A microorganism found living under conditions of high ________ is a barophile
A) pH values
B) oxygen concentrations
C) hydrostatic pressure
D) carbon dioxide levels
E) salt concentrations
C
Bloom's Taxonomy: Knowledge
Section: Growth Requirements
Learning Outcome: 6.6
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You are researching a cytoplasmic protein associated with a nerve disorder. The native form of the enzyme appears to be globular protein; however, when a sample of the purified protein is treated with a chemical that reduces disulfide bonds,
the enzymatic activity decreases dramatically and multiple globular proteins can be detected in the sample. What does this tell you about the protein? A) The primary structure of the protein contains multiple cysteine residues that are hydrolyzed by the chemical reductant. B) The protein is most likely composed of multiple polypeptide chains that are held together by disulfide bonds. C) The protein is most likely composed of ? helices that are held together by disulfide bonds. D) The protein is most likely composed of ? sheets that are held together by disulfide bonds. E) The primary and secondary structure of the protein depends on disulfide bonds.
What advantage do gymnosperms have over ferns?
A. Gymnosperms produce pollen and do not require water to reproduce. B. Gymnosperms have alternation of generations. C. Gymnosperms have a vascular system, which allows them to grow taller. D. Gymnosperms can grow larger gametophytes. E. Gymnosperms can produce flowers and fruits to aid in seed dispersal.
The element carbon has 6 protons and 6 neutrons in its nucleus. Which of the following represents the carbon-14 isotope?
a. 6 protons, 8 neutrons b. 6 protons, 7 neutrons c. 7 protons, 6 neutrons d. 8 protons, 6 neutrons
An important function of nomenclature is to
A) facilitate unambiguous communication. B) clarify relationships among organisms. C) provide an understanding of evolutionary relationships. D) define the characteristics used for classification. E) provide a detailed description of an organism.