An estimated ________ DNA base pairs comprise the human genome.
A) 32,000
B) 320,000
C) 3.2 million
D) 3.2 billion
D) 3.2 billion
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Answer the following statements true (T) or false (F)
1. All enzymes are proteins. 2. Because of the abundance of ribosomes, translation is NOT an energy costly process for the cell. 3. The cells of every organism make only a few different tRNA molecules encoded by the same gene. 4. In eukaryotes, the 40S and 60S subunits combine to form a 100S ribosome.
Chapter 16 mentioned that less than 3 percent of the water on Earth is freshwater. There are
organisms that have adjusted to the salinity of the oceans, but humans are not among them. Therefore, scientists are working on various desalination procedures—methods of removing the salt from ocean water. These desalination procedures are quite expensive and require advanced technology. Aside from the cost, what do you see as other potential drawbacks of performing desalination on a large scale?
What will be an ideal response?Looking at your results of the Ames test using bacteriological agar medium plates lacking the amino acid histidine, you find that there are many colonies growing on the agar. Â How do you interpret this result?
A. The drug being tested has no inhibitory effect on the bacterium; therefore, it is not a good antibiotic to give for treatment of disease. B. The chemical being tested is mutagenic. C. The bacterium has turned its operon genes on, producing proteins necessary for growth. D. The bacterium does not have any plasmids, so it cannot grow on the medium.
The target tissue for erythropoietin is ____
a. brain b. kidney c. liver d. bone marrow e. lungs