You are planning to perform some protein-protein interaction studies to identify a receptor for a steroid hormone you have been working on. You start by fractionating the cell. What cell fraction would you want to work with to identify the steroid hormone receptor of interest?
A. The ribosomal fraction
B. The mitochondrial fraction
C. The cytoplasmic fraction
D. The plasma membrane fraction
E. The extracellular fraction
Answer: C
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A 1,4-glycosidic linkage would refer to which one of the following?
A. hydrogen bonding between carbon 1 and carbon 4 within a monosaccharide B. the covalent bond between the 1' carbon of one nucleotide and the 4' carbon of a second nucleotide C. the covalent bond between amino acid 1 in one protein and amino acid 4 in a second protein D. hydrogen bonding among the four bases in double-stranded DNA E. the covalent bond between carbon 1 of one monosaccharide and carbon 4 of a second monosaccharide
The pig skin displaying the characteristic diamond shaped lesions is associated with ______, which is caused by ____:
A. erysipelas, erysipelothrix rhusiopathiae B. erysipeloid, erysipelothrix rhusiopathiae C. reactive dermatitis, erysipelothrix rhusiopathiae D. erythema chronicum, erysipelothrix rhusiopathiae
What is the hallmark of dichotomous keys?
a. They are open-ended questions. b. They only relate to biochemical processes of the cell. c. They consist of a series of paired statements, in which only one statement of each pair applies to a given organism. d. They only relate to the shape of the cell.
The upper distribution of tropical intertidal nerites can be found in the ____ zone
a. brown. b. white. c. gray. d. black. e. yellow