front 1 In the plasma membrane, _________ form(s) the lipid bilayer, __________ determine(s) the fluid membrane, and ___________ mainly determine(s) the function of the membrane. | back 1 phospholipids, cholesterol, proteins |
front 2 Which of the following functioning proteins are found in the plasma membrane? | back 2 -channel proteins
|
front 3 In general, lipid-soluble molecules diffuse through the _________; small, water-soluble molecules diffuse through the ____________. | back 3 lipid bilayer, carrier proteins |
front 4 Small pieces of matter, and even whole cells, can be transported across the membrane in? | back 4 vesicles |
front 5 The rate of diffusion increases if the... | back 5 viscosity of a solution decreases |
front 6 Concerning the process of diffusion, at equilibrium... | back 6 -the net movement of solution stops
|
front 7 If a cell is placed in a(n) __________ solution, lysis of the cell may occur. | back 7 hypotonic |
front 8 Suppose that a woman runs a long-distance race in the summer. During the race, she loses a large amount of hyposmotic sweat. You would expect her cells to... | back 8 shrink |
front 9 Which of these statements about facilitated diffusion is true? | back 9 In a facilitated diffusion, net movement is down the concentration gradient. |
front 10 Which of these statements concerning the symport of glucose into cells is true? | back 10 The concentration of glucose can be greater inside cells then outside cells. |
front 11 A white blood cell ingests solid particles by forming vesicles. This describes the process of... | back 11 phagocytosis |
front 12 Given these characteristics:
| back 12 !. Requires energy
|
front 13 Cytoplasm is found | back 13 outside the nucleus and inside the plasma membrane |
front 14 Which of these elements of the cytoskeleton is composed of tubulin and forms essential components of centrioles, spindle fibers, cilia, and flagella?
| back 14 c. microtubules |
front 15 A large structure, normally visible in the nucleus of a cell, where ribosomal subunits are produced is the
| back 15 c. nucleolus |
front 16 A cell that synthesizes large amounts of protein for use outside the cell has a large
| back 16 c. amount of rough endoplasmic reticulum |
front 17 Which of these organelles produces large amounts of ATP?
| back 17 b. mitochondria |
front 18 Cylindrically shaped extensions of the plasma membrane that do not move, and are supported with actin filaments; they may function in absorption or as sensory receptors. This describes
| back 18 e. microvilli |
front 19 A portion of an mRNA molecule that determines one amino acid in a polypeptide chain is called a
| back 19 c. codon |
front 20 In which of these organelles is mRNA synthesized?
| back 20 a. nucleus |
front 21 During the cell life cycle, DNA replication occurs during the
| back 21 d. S phase |
front 22 Given the following activities:
| back 22 1. repair
|