If you were able to look very closely at a portion of DNA and find methylated histones, you would
A. be looking at a region of inactive chromatin.
B. be looking at a chromatin remodeling complex.
C. be mistaken since only DNA can be methylated, not histones.
D. be looking at a region of active chromatin.
Answer: A
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What functional group is not present in the following structure for thyroxine (thyroid hormone)?
a. carboxylic acid b. organic halide c. amine d. all of the above
How is synaptic signaling different from paracrine signaling?
A. Synaptic signaling specifically involves neurotransmitters that are released from neurons. B. Synaptic signaling acts over a longer distance than paracrine signaling. C. Synaptic signaling requires receptors to elicit a response in the target cell. D. Synaptic signaling is longer in duration than paracrine signaling. E. All of the answer options are correct.
Conidia are asexual spores
____________________ Indicate whether the statement is true or false.
To process information, postsynaptic neurons often add up simultaneous signals from several presynaptic neurons. Which structure and process allow them to do so?
A. Dendrites; temporal summation B. Axons; temporal summation C. Dendrites; spatial summation D. Axons; spatial summation