In order for high level expression of the E. coli lac operon to occur, a complex of catabolite activator protein and ________ must be bound to the DNA near the promoter.
Fill in the blank(s) with the appropriate word(s).
cAMP
cyclic AMP
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Which of the following statements about antibody-mediated immunity is CORRECT?
A. It primarily defends against viruses that have already infected cells. B. It is responsible for transplant tissue rejection. C. It protects the body against cells that become cancerous. D. It defends against parasites, bacteria, and viruses. E. It primarily defends against bacteria that have already infected cells.
Some scientists predict that as atmospheric carbon dioxide levels increase, plant growth will also increase. What is the best explanation for this hypothesis?
A. Plants release carbon dioxide into the atmosphere during respiration. B. Plants consume carbon dioxide from the atmosphere during photosynthesis. C. Plants consume carbon dioxide from the atmosphere during respiration. D. None of the answer choices is correct. E. Plants release carbon dioxide into the atmosphere during photosynthesis.
What are transgenic organisms? Explain the rationale behind using these organisms to produce some
of the proteins needed for human use, instead of relying solely on proteins produced by genetically engineered E. coli What will be an ideal response?
Eukaryotic mitochondria have their own 70S ribosomes and circular DNA.
Answer the following statement true (T) or false (F)