A protein that is destined to reach the plasma membrane is making its way through the Golgi. At that moment, a drug was added to cells, blocking trafficking at the trans face of the Golgi. As a result, what would happen to the protein?
A. The protein would continue on to the cell surface.
B. The protein would be stuck in the Golgi.
C. The protein would return to the endoplasmic reticulum via the trans face of the Golgi.
D. The protein would exit the Golgi, but instead be targeted to the cytoplasm.
B
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Analyzing DNA sequences in different populations provided us with what new information?
A. that the bonobo and chimpanzee are two different species B. that the gorilla is more closely related to humans than the orangutan C. that the chimpanzees are more closely related to humans than gorillas are D. that Old World monkeys are separate from the Apes E. None of the answer options is correct.
Hans Spemann and Hilde Mangold conducted pioneering experiments in which they transplanted the dorsal lip of the blastopore in an early gastrula newt to the ventral side of another early gastrula newt. What was the outcome of this experiment?
A. Discovery of Spemann's organizer. B. The development of dorsal structures (neural tube, notochord) on both the dorsal and ventral parts of the gastrula that received the transplant. C. Identification of a morphogenic field in the dorsal lip of the blastopore of an early gastrula. D. Discovery of a group of embryonic cells in the dorsal lip that ultimately produce specific body structures. E. All of the choices are correct.
Carbon dioxide is an example of a(n)
a. atom. b. ion. c. compound. d. mixture. e. element
Delayed hypersensitivity is ____ mediated.
A. humoral B. antibody C. cell