Which one of the following is a major difference between integrins and cadherins?
A. Integrins are integral membrane proteins,
whereas cadherins are not.
B. Cadherins are found in cellular junctions,
whereas integrins are not.
C. Integrins allow cells to adhere to
extracellular matrix, whereas cadherins do
not.
D. Cadherins associate with intermediate
filaments, whereas integrins do not.
C
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In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. What purpose must this serve?
A) It allows for an increased rate of glycolysis. B) It allows for an increased rate of the citric acid cycle. C) It increases the surface for oxidative phosphorylation. D) It increases the surface for substrate-level phosphorylation. E) It allows the liver cell to have more peroxisomes.
In Anolis lizards, the male sex hormone ____ induces ____ behavior in males, which in turn stimulates females to produce hormones that cause ____
Fill in the blank with the appropriate word.
The short, branched extensions that receive input from other neurons are the
A. dendrites. B. axons. C. synapses. D. nuclei. E. nodes of Ranvier.
Which of the following does not occur in both prokaryotes and eukaryotes?
A. There is DNA transcription. B. There is alternative splicing of genes. C. tRNA carries the amino acid to the mRNA to make polypeptides. D. In RNA, uracil replaces thymine. E. Translation occurs on a ribosome.