Which of the following statements does NOT describe eukaryotic cells?
a. Their cytoplasm consists of the cytosol and organelles.
b. They possess a selectively permeable membrane.
c. Their genetic material is localized in the cytoplasm.
d. Their DNA is organized into chromosomes.
Ans: c. Their genetic material is localized in the cytoplasm.
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What would be the effect on in vitro transcription if you replaced the entire TFIID protein with the single subunit TBP?
A. Transcription could not be terminated B. The initiation complex could not form C. RNA polymerase II would never be recruited to carry out elongation D. There would be no effect
The most selectively toxic drugs are those that
A. target microbial sites that are not present in humans, e.g., the bacterial cell wall. B. cause damage to host tissues. C. cause allergic reactions in humans. D. target structures present in both microbes and humans, thus causing host tissue damage.
Viral proteins from which of the following are most likely to bind pRB, increasing the risk for cancer?
A. Epstein-Barr virus B. Herpes simplex virus C. Hepatitis B virus D. Human papillomavirus E. Rous sarcoma virus
How do exocrine glands differ from endocrine glands?
What will be an ideal response?