Which of the following is NOT a macromolecule needed by animals?
A. Water
B. Sugar
C. Lipids
D. Protein
E. Nucleic acids
Ans: A. Water
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How do the reproduction of human immunodeficiency virus (HIV) and bacteriophage lambda differ from each other?
A. HIV production requires integrase, while bacteriophage lambda does not B. bacteriophage lambda attaches to specific proteins on the cell surface, while HIV does not C. HIV encodes and uses reverse transcriptase, while lambda phage does not D. HIV can reproduce in either eukaryotic or prokaryotic cells, while bacteriophage lambda can only infect bacteria E. None of the answers are correct.
What are the consequences of lesion bypass?
What will be an ideal response?
Following a nerve impulse, what triggers the opening of plasma membrane voltage-gated Ca2+ channels?
a) membrane hypopolarization b) binding of an appropriate ligand c) membrane depolarization d) binding of K+ ions e) membrane hyperpolarization
The mediator protein complex in eukaryotes
A. facilitates interactions between RNA polymerase II and regulatory transcription factors. B. controls the rate at which RNA polymerase translates mRNA. C. completely enfolds RNA polymerase and the general transcription factors. D. is composed of a single protein.