Answer the following questions true (T) or false (F)
1. A molecule of glucose contains six carbon atoms, twelve hydrogen atoms, and six oxygen atoms. The proper way to write the molecular formula for glucose is 6C12H6O.
2. Acids increase the H+ concentration in a solution and so lower pH.
3. Blood pH is stabilized by carbonic acid (H2CO3 ) which releases H+ ions to lower pH and bicarbonate (HCO3-) which absorbs H+ ions to raise pH.
1. FALSE
2. TRUE
3. TRUE
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The accompanying figure illustrates ____
a. the production of recombinant DNA b. probing for transferred genes c. DNA fingerprinting d. DNA sequencing e. producing radioactive probes
The major difference between the smooth and rough ER is that ____
a. smooth ER is isolated to the nucleus b. vesicles are found only in the smooth ER c. rough ER contains ribosomes d. smooth ER is the site of polypeptide synthesis e. rough ER is the site of lipid synthesis
One of the drawbacks to using pheromones for communication is:
a. they are effective only at night. b. they can only affect unrelated species. c. they are toxic to unrelated species. d. they require little energy for production. e. they can transmit only a limited amount of information.
What is the most reasonable conclusion that can be drawn from the fact that the frequency of the recessive trait (aa) has not changed over time?
A) The two phenotypes are about equally adaptive under laboratory conditions. B) The genotype AA is lethal. C) There has been a high rate of mutation of allele A to allele a. D) There has been sexual selection favoring allele a.