An inhibitory post-synaptic impulse (IPSP):
a. is represented by a movement of the neuron to a more positive voltage.
b. moves the neuron further away from firing.
c. involves the action of acetylcholine.
d. occurs when Na+ ion channels open.
e. occurs when K+ ion channels close
B
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A diploid cell only has two copies of most genes, but can make hundreds of copies of a protein from those genes per second because
A. the DNA can replicate during transcription, producing double-sided mRNA to accelerate the translation process. B. transcription can repeat and make multiple mRNA copies of genes, and multiple ribosomes can translate the same mRNA. C. multiple ribosomes can actively attach to the template DNA and conduct translation immediately after transcription. D. multiple copies of the same mRNA can be produced with multiple promoter sequences to simultaneously initiate multiple ribosomes. E. multiple codons can encode for the same amino acid, allowing different versions of the protein to be made.
Which of the researchers that elucidated the structure of DNA did not receive a Nobel Prize?
a. Wilkins b. Franklin c. Crick d. Watson e. All 4 received the Nobel.
Carbon is released into the atmosphere as carbon dioxide through the process of
A) photosynthesis. B) primary production. C) respiration. D) fixation.
Which of the following is a fundamental characteristic of the Notch pathway?
A) It provides symmetry to plant flowers. B) It allows mRNAs to accumulate in the posterior portion of the Drosophila embryo. C) It works through nuclear signals involving the lac operon. D) It directs mRNAs to antisense systems in the posterior portion of all organisms. E) It works through direct cell-to-cell contact.