Proteins made on ribosomes may be further modified within which organelle?

a. nucleus.
b. lysosomes.
c. mitochondria.
d. Golgi complex.
e. peroxisomes


d

Biology & Microbiology

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An artificial vesicle composed of a lipid bilayer is mixed with several peripheral membrane proteins and analyzed by freeze-fracture electron microscopy. What will be seen in the resulting image?

A. bumps will be visible on both layers B. bumps will be visible only in the extracellular face (E face) C. bumps will be visible in the protoplasmic face (P face) D. No bumps will be visible in either face

Biology & Microbiology

Where did Earth's atmosphere originate?

a. Earth's gravity trapped gases from passing comets. b. Gases were released from Earth itself as it cooled. c. Earth’s gravity trapped gases from Earth itself. d. Earth’s gravity trapped gases from passing comets, gases were released from the Earth itself as it cooled, and Earth’s gravity trapped gases from the Earth itself. e. Gases were released from Earth itself as it cooled Earth’s gravity trapped gases from the Earth itself.

Biology & Microbiology

The active site of an enzyme ____

a. is where the coenzyme is located b. is a specific bulge or protuberance on an enzyme c. is a groove or crevice in the structure of the enzyme complementary to the substrate d. will react with only one substrate no matter how many molecules may resemble the shape of the substrate e. rigidly resists any alteration of its shape

Biology & Microbiology

In brown air fog, which substance combines with nitrogen dioxide in the sunlight to form

photochemical smog? a. carbon monoxide b. water vapor c. hydrocarbons d. sulfuric acid e. carbon dioxide

Biology & Microbiology