In prokaryotes, inducers are small molecules that:
A. bind to activators and promote
transcription.
B. bind to activators and inhibit transcription.
C. bind to repressors and promote
transcription.
D. bind to repressors and inhibit transcription.
E. None of these choices is correct.
C
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Much of the control of the digestive system originates in the neuron networks of the submucosa
Indicate whether the statement is true or false.
Which of the following does NOT give rise to
brain tumors?
a. neurons b. neuroglia c. epithelial cells in the meninges d. epithelial cells in the pituitary glands e. all of these can give rise to brain tumors
Most major enzymatic digestion of food material stakes place where in the digestive system?
A) Stomach B) Small intestine C) Mouth D) Large intestine
When you hold your breath, which of the following blood gas changes leads initially to the urge to breathe again?
A) rising carbon monoxide level B) rising carbon dioxide level C) falling carbon monoxide level D) rising carbon dioxide level and falling carbon monoxide level