The term conformation refers to:
A. the three-dimensional shape of a molecule, such as a protein.
B. the ability of DNA to copy itself.
C. the energy held in the bonds of an organic molecule, such as a protein.
D. the amino acid sequence (primary structure) of a protein.
Answer: A
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Answer the following statements true (T) or false (F)
1. Each resting neuron has a slight positive charge on the outside. 2. In the resting neuron, there is an excess of sodium ions on the interior of the cell. 3. When a resting neuron is stimulated, sodium ions rush into the cell, causing the interior to become negatively charged. 4. Saltatory conduction occurs when a nerve impulse jumps over the myelin sheath of an axon. 5. Saltatory conduction tends to be slower then nonsaltatory nerve conduction.
Myopia generally occurs when the ________.
A. cornea is uneven B. eyeball is too long C. lens is uneven D. eyeball is too short
As someone starts to develop in puberty, most cells in their reproductive organs are probably starting to express
A. fewer receptors for sex hormones. B. more receptors for sex hormones.
The posterior root of a spinal nerve contains ________fibers, while the anterior root contains ________ fibers.
A. motor; sensory B. sensory; association C. motor; association D. sensory; motor