The probability that the daughter of a woman with a dominant disease-causing allele on one X chromosome and a normal male will be affected with the disorder is
A) 2/3.
B) 1/2.
C) 3/16.
D) 1/3.
B) 1/2.
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Individuals with nicotine acetylcholine receptors that bind tightly to nicotine are more likely to _____
a. have a family member who is resistant to nicotine addiction b. have behavioral disorders c. have mutations in the GABBR2 gene d. be vulnerable to nicotine addiction e. show resistance to nicotine addiction
The C4 cycle
a. replaces the carbon fixation stage of the Calvin cycle. b. supplements the activity of rubisco by providing a second source of 3PGA for the reduction stage of the Calvin cycle. c. is more efficient than the Calvin cycle because less ATP is consumed in the process. d. ensures that CO2 is provided to rubisco and thus prevents photorespiration. e. is most commonly associated with plants living in humid climates.
Which statement is true of carbon monoxide?
a. It is a waste product of photosynthesis. b. It is always present when organic material burns. c. It is harmless. d. It has a strong odor. e. It is a greenhouse gas.
Retroviruses have a DNA polymerase called reverse transcriptase which transcribes the RNA
genome into a DNA intermediate. ____________________ Indicate whether the statement is true or false.