Which of the following describes the plasma membrane?
A) A single layer of phospholipids forms the membrane.
B) A bilayer of phospholipids forms the membrane.
C) A double layer of protein forms the membrane.
D) The membrane is made up of cristae.
B
Explanation:
A) There is more than one layer of phospholipids forming the plasma membrane.
C) Proteins are found throughout the plasma membrane but do not make up the majority of the membrane.
D) Cristae are associated with the mitochondrial membrane.
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The glands that produce a lipid-rich lubricant that prevents the eyelids from sticking together are called ________.
Fill in the blank(s) with the appropriate word(s).
Absorption of stray light rays (not absorbed by photoreceptors) occurs in the
A. cornea. B. choroid. C. conjunctiva. D. sclera.
Which of the following phrases would apply to cardiac muscle cells?
A. Possess special cell-to-cell contacts called intercalated discs B. Organized in parallel columns or bundles C. Contain actin but no myosin D. Multinucleated like skeletal muscle fibers E. Develop a significant oxygen deficit during systole
With regard to reversible chemical reaction rates, which of the following statements is true?
A. Increasing the concentration of the products will increase the forward reaction rate. B. Increasing the activation energy will increase the forward reaction rate. C. Increasing the temperature will increase the forward and reverse reaction rate. D. As a reaction progresses, the rate of the forward reaction increases as the concentration of reactants decreases. E. Decreasing the concentration of the reactants will increase the forward reaction rate.