Organisms that can grow without oxygen are called anaerobes and were the only organisms that could survive in Earth’s early atmosphere.
a. Very high temperatures
b. Very dry places
c. Very cold temperatures
d. Harsh chemicals
a. Very high temperatures
Early prokaryotes were adapted to survive very high temperatures, such as living near geothermal vents and volcanoes, during the first several billion years of life on Earth.
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In your research, you have discovered that Protein X is often ubiquitinated in people with a certain disease. What would you predict about levels of Protein X in these patients?
A. Levels of Protein X will be low due to degradation in the proteasome. B. Levels of Protein X will be the same, just carrying a ubiquitin tag. C. Levels of Protein X will be increased due to transcriptional activation. D. Levels of Protein X will be decreased due to negative feedback on transcription. E. Levels of Protein X will be increased due to protection from degradation. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about ubiquitination? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which of the following statements is correct with respect to flagella and cilia?
A) The flagellum is usually at the leading end of a swimming sperm cell. B) Cilia generate a force parallel to the cell surface. C) There usually are fewer cilia than flagella. D) Cilia generally are longer than flagella. E) Cilia often have a helical pattern of movement.
If the surface area of a cell that is shaped like a cube increases 100 times, its volume increases about
A) 5 times. B) 10 times. C) 100 times. D) 1000 times.
Why is perspiration an effective defense against microorganisms?
A) basic pH and low salt content B) basic pH, low salt content, and presence of lysozyme C) low salt content D) presence of lysozyme E) basic pH