Which of the following statements is NOT TRUE about sister chromatids?
a. Sister chromatids separate from one another during prometaphase
b. Two sister chromatids make up one chromosome
c. Sister chromatids are generated during S phase
d. Sister chromatids are physically attached by the centromere
e. Sister chromatids normally end up in separate daughter cells
A
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An adult cell that is reprogrammed to be pluripotent is called a(n):
A. embryonic stem cell. B. induced pluripotent stem cell. C. germ layer pluripotent stem cell. D. pluripotent stem cell. E. regenerative pluripotent stem cell.
Many introduced species have deleterious effects on
communities and ecosystems because a. coevolved parasites and competitors are absent. b. the introduced species are long-lived. c. predators prefer the introduced species; therefore, the local prey proliferate to dangerously high levels. d. the communities from which they came lost an important predator, competitor, or parasite. e. all of these occur.
The adaptations of species involve
a. form. b. function. c. behavior. d. life history patterns. e. all of these.
You are working to characterize a novel protein in mice. Analysis shows that high levels of the primary transcript that codes for this protein are found in tissue from the brain, muscle, liver, and pancreas. However, an antibody that recognizes the C-terminal portion of the protein indicates that the protein is present in brain, muscle, and liver, but not in the pancreas. What is the most likely explanation for this result?
A. The transcript is immediately degraded in the pancreas. B. The transcript receives a 3' poly-A tail in the pancreas. C. The gene that codes for this protein is not transcribed in the pancreas. D. Alternative splicing in the pancreas creates a protein missing the domain that the antibody recognizes. E. The transcript receives a 5' cap in the pancreas.