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 mitochondrial fraction
B. the cytoplasmic fraction
C. the extracellular fraction
D. the ribosomal fraction
E. the plasma membrane fraction
Answer: B
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What will be an ideal response?
In addition to the capsid, some viruses also have which of the following?
a. a virion b. a cell wall c. a viral envelope d. a plasma membrane
Asexual reproduction _____
a. results from fertilization
b. produces genetic clones c. is more similar to meiosis than mitosis d. leads to increased genetic variation in offspring e. involves crossing over
Which statement most accurately describes the colonial flagellate hypothesis?
A. Both animals and fungi are descended from an ancestor that resembles a spherical colony of flagellated cells. B. All animals are descended from an ancestor that resembles a single celled organism that was a flagellated cell. C. Animals are descended from an ancestor that resembles a spherical colony of flagellated cells. D. None of these describe the colonial flagellate hypothesis.