A gene that codes for a protein was removed from a eukaryotic cell and inserted into a prokaryotic cell. Although the gene was successfully transcribed and translated, it produced a different protein than it produced in the eukaryotic cell. What is the most likely explanation?
A. Eukaryotic genes often contain introns while prokaryotic genes do not.
B. Eukaryotic transcripts have a 5' cap while prokaryotic transcripts do not.
C. There are slight differences in the genetic code for prokaryotes and eukaryotes.
D. Unlike eukaryotes, which have three different RNA polymerases, prokaryotes have a single RNA polymerase.
Answer: A
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The most notable difference between PrPC (normal protein) and PrPSc (prion protein) is
A. PrPC causes a cell to undergo rapid apoptosis. B. PrPC is a much longer polypeptide chain, compared to PrPSc. C. PrPc is a functional glycolytic enzyme, whereas PrPSc is nonfunctional. D. PrPc folds appropriately whereas PrPSc does not fold correctly.
True or false: Bushmen hunters exploit the effects of physiological stress by forcing their prey to run when the temperature exceeds the animal's core temperature
A. true B. false
Features associated with the leaf epidermis are:
A. guard cells B. trichomes C. cuticular wax D. pores E. All of the choices are correct
Which of the following antiviral drug categories is incorrectly matched with its description?
A) Nucleotide reverse transcriptase inhibitors: Target retroviruses B) Nucleoside analogs: Mimic normal nucleotides interfering with nucleic acid replication C) Interferons: Used for postexposure prophylaxis D) Proteases: Target protein-cutting enzymes which make mature virons E) Antisense antivirals: Short sequences of nucleotides that are complementary to viral RNA