. Neural communication occurs through chemical messengers called neurotransmitters which send messages from one neuron to another. Which if the following statements about neurotransmitter signaling is correct? A. Neurotransmitters are local regulators that enable long-distance communication between neurons. B. Neurotransmitters are long-distance regulators that enable long or short-distance communication among neurons. C. Neurotransmitters are long-distance regulators that enable short-distance communication among neurons. D. Neurotransmitters are local regulators that enable short-distance communication between neurons. 2. Which of the following statements about histones is true? A. Histones do not undergo modifications once attached to DNA. B. The location of a gene relative to histone surface will affect gene expression. C. Histone modifications can only affect gene expression. D. Histone octamer is composed of dimers of H1, H2, H3, and H4. 3. Which of the following can explain why humans are complex organisms despite having fewer genes relative to genome size. A. Humans have accumulated beneficial mutations over centuries. B. Multiple genes in humans are co-regulated. C. A lot of human proteins can function in multiple physiological processes. D. Human genome underwent multiple duplication, insertion, and deletion events through time.
1. Neural communication occurs through chemical messengers called neurotransmitters which send messages from one neuron to another. Which if the following statements about neurotransmitter signaling is correct?
A. Neurotransmitters are local regulators that enable long-distance communication between neurons.
B. Neurotransmitters are long-distance regulators that enable long or short-distance communication among neurons.
C. Neurotransmitters are long-distance regulators that enable short-distance communication among neurons.
D. Neurotransmitters are local regulators that enable short-distance communication between neurons.
2. Which of the following statements about histones is true?
A. Histones do not undergo modifications once attached to DNA.
B. The location of a gene relative to histone surface will affect gene expression.
C. Histone modifications can only affect gene expression.
D. Histone octamer is composed of dimers of H1, H2, H3, and H4.
3. Which of the following can explain why humans are complex organisms despite having fewer genes relative to genome size.
A. Humans have accumulated beneficial mutations over centuries.
B. Multiple genes in humans are co-regulated.
C. A lot of human proteins can function in multiple physiological processes.
D. Human genome underwent multiple duplication, insertion, and deletion events through time.
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