From DNA x-ray diffraction data, it was determined that _____
a. the amount of adenine equaled the amount of thymine
b. different species have different proportions of adenine and guanine
c. nitrogen containing bases were arranged on the outside of the double helix structure
d. the shape of the molecule could be a double helix
e. the backbone of the double helix was held together by hydrogen bonds
ANSWER: d
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Which of the following relationships best describes the partial pressure of oxygen (pO2) in the lung, red blood cells, and blood plasma?
A. pO2 lung < pO2 blood plasma < pO2 red blood cell B. pO2 blood plasma < pO2 lung < pO2 red blood cell C. pO2 red blood cell < pO2 lung < pO2 blood plasma D. pO2 red blood cell < pO2 blood plasma < pO2 lung
The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s22s22p6 . What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?
A. 1s22s22p63s23p6 B. 1s22s62p23s63p2 C. 1s22s83p8 D. 1s22s23p64s25p6
A behavior that benefits others at a cost to oneself is known as
A. cooperation. B. altruism. C. aggression. D. group selection. E. cognition.
During which process would ethanol and carbon dioxide be released from the cell?
A) glycolysis B) the citric acid cycle C) the electron transport chain D) alcohol fermentation