Which mutations can interfere with the proper insertion of a protein in the plasma membrane?
A. A polar amino acid to a non-polar amino acid within a transmembrane domain
B. A non-polar amino acid to a polar amino acid within a transmembrane domain
C. A polar amino acid to a non-polar amino acid within a cytoplasmic domain
D. A non-polar amino acid to a polar amino acid within a cytoplasmic domain
B
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________ "tag" misfolded proteins so that they can be refolded or sent to proteasomes.
A) Chaperones B) Folding catalysts C) Signal sequences D) Ubiquitin molecules
Based on your knowledge of basic geometric relationships, what is the actual surface area to volume ratio for Figure B
in the accompanying figure? a. 0.01 b. 0.06 c. 0.6 d. 100 e. 1,000
During the early part of the cleavage stage in frog development, the rapidly developing cells
A) skip the mitosis phase of the cell cycle. B) skip the S phase of the cell cycle. C) skip the G1 and G2 phases of the cell cycle. D) rapidly increase the volume and mass of the embryo. E) skip the cytokinesis phase of the cell cycle.
In early vertebrates, which component of the brain was devoted largely to coordinating motor reflexes?
A. Forebrain B. Thalamus C. Midbrain D. Hindbrain E. Medulla oblongata