In an attempt to visualize the fluid mosaic model of a
membrane, we could describe the __________ as
floating in a sea of __________.
a. lipid; protein.
b. phospholipids; carbohydrate.
c. proteins; lipid.
d. fats; water.
e. glycolipids; sterols.
Answer: c
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The selective permeability of a cell membrane is due to ____
a. the hydrophobic core formed by the phospholipid tails b. the hydrophilic end facing the cell exterior c. glycolipids on the surface of the membrane d. the position of cholesterol in the membrane bilayer e. the hydrophilic core formed by the phospholipid tails
Mendel’s principle of independent assortment is directly related to an event that occurs in _____ of
meiosis. A. prophase I B. metaphase I C. anaphase I D. prophase II E. metaphase II
Myofibrils are composed of multiple skeletal muscle cells.
a. true b. false
How do amino acids like hydroxylysine and thyroxine, which are not among the 20 amino acids that are inserted into proteins, get into proteins
A) Their atoms are altered by insertion into the polypeptide B) There are more than the 20 amino acids that are said to be inserted into proteins C) they are inserted directly D) They are the result of the alteration of R groups of the 20 amino acids before their incorporation into the polypeptide E) They are the result of the alteration of R groups of the 20 amino acids after their corporation into the polypeptide