Which of the following viral types enter animal cells via fusion with the animal cell membrane?
A. non enveloped viruses
B. naked viruses
C. enveloped viruses
D. All of these choices are correct.
Answer: C
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When retinal in bacteriorhodopsin becomes excited, it directly catalyzes the formation of ATP
Indicate whether the statement is true or false.
Phenotypic differences between humans and chimpanzees may be better explained by the time during development when genes are turned on in humans and chimpanzees, than by genetic differences themselves
A. true B. false
Which of the following statements is correct regarding C4 plants as compared with CAM plants?
A. In C4 plants, CO2 capture and the Calvin cycle happen in different places, whereas in CAM plants CO2 capture and the Calvin cycle happen at different times. B. In C4 plants, CO2 capture and the Calvin cycle happen at different times, whereas in CAM plants CO2 capture and the Calvin cycle happen in different places. C. C4 plants produce a 4-carbon organic acid as a storage form, whereas CAM plants produce a 4-carbon inorganic acid as a storage form. D. C4 plants do not require additional ATP, whereas CAM plants do require additional ATP. E. C4 plants are found in hot sunny environments, whereas CAM plants are found in moist cool environments.
Oxygen-hemoglobin dissociation curves at three different pH levels The phenomenon illustrated in Figure 46-4 is known as:
a. carbon dioxide unloading.
b. the Bohr effect.
c. hemoglobin transportation.
d. chloride shift.
e. residual capacity.