White matter areas of the nervous system mostly contain:
A) ganglia. B) neuron cell bodies.
C) myelinated axons. D) cerebrospinal fluid.
Answer: C
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The AP-1 transcription factor is a heterodimer of the Fos and Jun proteins. What is the protein-dimerization motif present in these two proteins?
A. basic leucine zipper B. helix-turn-helix C. zinc finger D. homeodomain
Which factor has caused primary productivity in Amazon forests to decline steadily over the past 30 years?
a. ocean acidification b. nitrogen fixation c. soil runoff d. increasing droughts e. depletion of oxygen in the atmosphere
PKU is a hereditary condition that appears only if a person has two copies of the gene. Therefore, the gene is ________
Fill in the blank(s) with correct word
Which protein forms microtubules in the cell?
a. Actin b. Tubulin c. Myosin d. ATP e. Keratin