In your research, you have discovered that Protein X is often ubiquitinated in people with a certain disease. What would you predict about levels of Protein X in these patients?
A. Levels of Protein X will be the same, just carrying a ubiquitin tag.
B. Levels of Protein X will be low due to degradation in the proteasome.
C. Levels of Protein X will be increased due to transcriptional activation.
D. Levels of Protein X will be decreased due to negative feedback on transcription.
E. Levels of Protein X will be increased due to protection from degradation.
Answer: B
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The placental mammalian counterpart of
Australia’s spiny anteater is the a. Tasmanian devil. b. aardvark. c. giant anteater. d. woolly lemur. e. aardvark and giant anteater.
Results from the study of globin variants indicate that ____
a. all amino acid substitutions cause severe phenotypic effects b. a change in a single nucleotide is sufficient to cause a genetic disorder c. extended chains of phosphorus molecules function to carry oxygen
d. all of the changes in globin are due to changes in amino acid sequences e. sickle cell anemia is not primarily an inherited disease
The cis face of the Golgi complex is most directly involved in which process?
a. synthesizing proteins
b. accepting vesicles from the ER c. packaging molecules in vesicles d. transporting molecules out of the Golgi e. catalyzing the efficient folding of proteins
Roundworms and arthropods are both ecdysozoans. This means they
A. have a body cavity that is completely lined with mesoderm. B. have the anus arise at or near the blastopore. C. have a trochophore larvae. D. periodically shed their outer covering. E. No answer choice is correct.