Mitochondrial inner membrane transmembrane proteins are inserted into the inner membrane
a. directly from the matrix into the lipid bilayer.
b. through Tim.
c. through Tim and Tom.
d. through a transporter called Oxa1.
Ans: d. through a transporter called Oxa1.
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Animals that have a fluid-filled cavity that separates the gut from the muscles of the body wall and
have that cavity completely lined by the peritoneum are said to be
a. pseudocoelomate. b. mesenteries. c. acoelomate. d. indeterminate. e. coelomate.
Which reproductive process will result in genetically unique individuals?
A) budding B) sexual reproduction C) vegetative reproduction D) binary fission
Suppose that the first part of a new polypeptide chain being produced in a eukaryotic cell does NOT have a signal peptide. Where would this polypeptide be located within the cell as it is maturing?
a. in the Golgi apparatus only b. in the cytoplasm only c. first in the rough ER, and then in the Golgi apparatus d. first in the cytoplasm, and then in the rough ER
When, if ever, do molecules stop moving?
A) At absolute zero (-273.15°C) B) At the freezing point (0°C) C) At the boiling point (100°C) D) Never