A) Cell wall B) Glycoproteins C) Protein channels D) Lipid vesicles or liposomes
A) By mixing lipids with proteins directly B) Through spontaneous folding of phospholipids C) By suspending a lipid in an aqueous solution and agitating it through sonication D) By freezing and thawing a lipid mixture
A) Protein synthesis B) DNA replication C) Cell-cell recognition D) Energy storage
A) Glucose B) Sialic acid C) Fructose D) Galactose
A) Neutral; no significant function B) Positive; a structural support for the membrane C) Variable; it changes based on pH D) Negative; an external barrier to charged particles
A) 75% B) 25% C) 10% D) Around 50%
A) Ion channels B) G-protein coupled receptors C) Protein pumps D) Lipid-anchored proteins
A) Facilitate passive diffusion of ions B) Bind hormones and neurotransmitters C) Allow protons to travel through the membrane by transferring from one amino acid side chain to another D) Transport glucose into cells
A) A structural component of the cytoskeleton B) A single polypeptide chain that crosses the lipid bilayer seven times responding to signal molecules C) A type of ion channel D) An enzyme that synthesizes ATP
A) An N-terminus "signal sequence" of amino acids B) Lipid rafts C) Glycosylation process D) Cholesterol molecules
A) It allows all substances to freely enter and exit the cell B) It prevents any substances from entering or exiting the cell C) It only regulates the entry of water D) It acts as a selectively permeable barrier regulating what enters and exits the cell
A) A process that occurs only in prokaryotes B) Movement of substances across the membrane without cellular energy input C) Transport requiring ATP D) Only applicable to large molecules
A) Active transport requiring energy B) A process exclusive to gases C) The movement of a solvent through a semipermeable membrane from high to low concentration D) Movement of solutes against their concentration gradient
A) Bind hormones for signal transduction B) Transport ions actively C) Facilitate passive diffusion of water across cell membranes D) Synthesize proteins
A) Synthesis of membrane lipids B) Extrusion of cell waste products C) The process by which cells absorb molecules by engulfing them D) Passive diffusion of small molecules
A) A form of endocytosis involving the engulfing of solid particles B) Passive transport of ions C) Active transport of glucose D) Extrusion of cellular contents
A) Active transport of ions B) Endocytosis of macromolecules C) Passive diffusion of water D) The process by which vesicles fuse with the plasma membrane to release their contents outside the cell
A) Movement of molecules against their concentration gradient B) Only applicable to large proteins C) Transport of substances across a membrane through protein channels or carriers without energy expenditure D) A process that does not involve membrane proteins
A) Integral proteins B) Peripheral proteins C) Sterols D) Glycolipids
A) 1972 B) 1925 C) 1895 D) 1935
A) Paucimolecular model B) Lipid bilayer hypothesis C) Monolayer hypothesis D) Fluid mosaic model
A) Plasmalemma B) Hautschicht C) Cell envelope D) Ectoplast
A) Cholesterol B) Sterols C) Glycolipids D) Phospholipids
A) Amorphous B) Solid crystalline C) Gaseous D) Liquid crystalline
A) Plants B) Animals C) Fungi D) Bacteria
A) Cellulose B) Chitin C) Peptidoglycan D) Lipopolysaccharides
A) Gram-positive bacteria B) Gram-negative bacteria C) All prokaryotes D) Archaea
A) Hydrogen bonding B) Self-assembly C) Covalent bonding D) Ionic bonding
A) Neither head nor tail regions B) Both head and tail regions C) Tail regions D) Head regions
A) Covalent bonds B) Hydrophobic interactions C) Van der Waals forces D) Ionic interactions
A) Mitochondria B) Focal adhesions C) Caveolae D) Podosomes
A) Actin B) Microtubules C) Collagen D) Intermediate filaments
A) Oolemma B) Axolemma C) Sarcolemma D) Plasmalemma
A) Zona pellucida B) Plasma membrane C) Fertilization envelope D) Sarcolemma itself
A) Granular layer B) T-tubules C) Zona pellucida D) Fertilization envelope
A) Axolemma B) Sarcolemma C) Plasmalemma D) Oolemma
A) Sarcolemma B) Zona pellucida C) Axolemma D) Fertilization envelope
A) Sarcolemma B) Plasmalemma C) Axolemma D) Oolemma |