Which of the following causes food poisoning?
A) Escherichia coli
B) Bacillus anthracis
C) Vibrio cholerae
D) Thiomargarita namibiensis
Answer: D
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The sister chromatids become separated during ____ of meiosis
a. metaphase I b. anaphase I c. telophase I d. anaphase II e. prophase II
Which structure is directly associated with synaptic transmission?
A) axon B) vesicles C) nodes of Ranvier D) cell body
Calcium ions (Ca2+) are present in the endoplasmic reticulum at concentrations 1,000 times higher than in the cytosol (the gel-like part of the cell outside organelles). One protein on the endoplasmic reticulum membrane is devoted to allowing Ca2+ to
move from the endoplasmic reticulum to the cytosol, and another protein moves Ca2+ from the cytosol to the endoplasmic reticulum. These processes are not trivial–Ca2+ released into the cytosol allows, for example, for muscle contraction and communication between nerve cells. In this pair of Ca2+ transport proteins, you would predict that the protein moving Ca2+ from the endoplasmic reticulum to the cytosol ________, and the protein that moves Ca2+ from cytosol to the endoplasmic reticulum ________. A) requires ATP; works without ATP B) is small; is large C) transports calcium slowly; transports calcium rapidly D) works without ATP; requires ATP E) is large; is small
The gnathostomes were the first vertebrates to:
A) develop feathers. B) possess jaws. C) develop scales. D) develop gills.