In this drawing of the lac operon, which molecule is an inactive repressor?
A) molecule A
B) molecule B
C) molecule C
D) molecule D
Answer: D
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A plant systematist studies the physiological systems of plants
a. True b. False
The integumentary system is responsible for all
EXCEPT which of the following? a. protection against bacterial attack b. protection against desiccation c. synthesis of a certain vitamin d. blood cell formation e. control of temperature
In the disease myasthenia gravis, the immune system attacks the receptors for the neurotransmitter acetylcholine. A drug is used to inhibit the enzyme acetylcholinesterase, which normally removes the neurotransmitter. This improves the condition of the
patient. How does this work? What will be an ideal response?
Disease-causing microorganisms are called
What will be an ideal response?