Successful cotransformation in the yeast two-hybrid system will result in the binding of proteins produced by each yeast expression vector. These fusion proteins function by
A) binding to the lacZ operator, preventing transcription.
B) binding to RNA polymerase, preventing transcription.
C) binding to the lacZ repressor, enabling transcription.
D) binding to the lacZ upstream activator sequence, enabling transcription.
E) changing color in the presence of X-gal.
D
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Plant hormones bind specific cellular receptor molecules that trigger gene expression responses. Which statement is correct concerning these responses?
A. Only cells lacking receptors can bind hormones. B. Only cells in the meristem can respond. C. Only cells that express the appropriate receptors can bind hormones. D. Only cells that have been previously activated can bind hormones. E. None of these choices is correct.
Particles of ________ control the water-holding capacity of soil and ion exchange
Fill in the blank(s) with correct word
Pain, especially intense sensations, is unpleasant and sometimes difficult for a person to cope with. Nevertheless, pain detection is essential for human survival. Explain how pain detection is necessary for a person's survival
What will be an ideal response?
Challenges in developing effective antiviral drugs with minimal side effects to the patient include
A) only the attachment stage of the viral life cycle is a suitable target for antiviral drug action. B) viruses have many more chemically distinct targets than living pathogens. C) the immune system is rarely successful in ending viral infections so there is no natural model to work from. D) viruses use the cell's own machinery and metabolism for replication. E) drugs can be easily delivered to reach viruses within host cells.