Homework Answers
Answer 47. C. Na+ and H+
active transport in plants and animals is mediated via sodium-potassium/water pumps
Answer 48.D.they can easily be separated from membrane
integral membrane proteins cannot be separated from until exposed to a detergent or non-polar solvent or denaturing agents.
Answer 49.D.phosphatidylserine
Rest all face the outer part of the cell.
Answer 50.C. Active transport ,calcium- ATPase
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47. Active transport of solutes is mediated by and in plant and animal cells, respectively A....
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their...
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their concentration gradients. B. can concentrate solutes on one side of a membrane. C. require ATP-driven protein pumps. D. None of these answers are correct E. require proteins to facilitate transport.
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their...
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their concentration gradients. B. can concentrate solutes on one side of a membrane. C. require ATP-driven protein pumps. OD. None of these answers are correct E. require proteins to facilitate transport.
1a) Which of the following statement is not true for active transport? A Na+/K+ pump is...
1a) Which of the following statement is not true for active transport? A Na+/K+ pump is a form of primary active transport B Requires ATP C transports solutes against their concentration gradient D glucose transporters (GLU transporters) use active transport to transport glucose across the membrane E Na+/glucose co-transport is an example of secondary active transport 1b) Which of the following statement is not true for intracellular and extracellular fluids? A Solute composition of the interstitial fluid is similar to...
4. Create some drawings/models of membrane transport proteins. Blob models are fine but they should be...
4. Create some drawings/models of membrane transport proteins. Blob models are fine but they should be annotated as instructed below. In your drawing include a model for a lipid bilayer clearly showing the polar and non-polar nature of the lipid components. The models of the proteins should include annotation/shading or other indication that indicates the types of amino acid functional groups you might expect to see in (a) the exterior of the protein in contact with the lipid bilayer, (b)...
When glucose moves across a phospholipid bilayer by passive transport, which factor determines the direction of...
When glucose moves across a phospholipid bilayer by passive transport, which factor determines the direction of its transport? Choose one: A. the charge difference across the membrane B. whether the cell is metabolically active or not C. the amount of energy available to fuel the transport process D. the concentrations of glucose on either side of the membrane
1- The cytoplasmic side of the plasma membrane’s lipid bilayer have high concentrations of (CHOOSE THREE):...
1- The cytoplasmic side of the plasma membrane’s lipid bilayer have high concentrations of (CHOOSE THREE): a. Sphingomyelin b. Phosphatidylethanolamine c. Phosphatidylcholine d. Phosphatidylinositol e. Phosphatidylserine f. Glycolipid 2- Which of the following characteristics DOES NOT keep proteins secured to the plasma membrane? a. Transmembrane domains in the protein b. Glycosylphosphatidylinositol (GPI) anchors c. Fatty acid lipids covalently attached to the protein d. Sugar molecules covalently attached to the protein e. Associations with lipid rafts 3- Which of the following...
QUESTION 39 Whereas animal cells drive indirect transport across the plasma membrane with a Na+ gradient,...
QUESTION 39 Whereas animal cells drive indirect transport across the plasma membrane with a Na+ gradient, other organisms like plants and bacteria use O A a glucose gradient B. a Ca2+ gradient C. a proton gradient D. osmosis E. endocytosis and exocytosis. Flight energy
Please help me with several of these questions, thank you very much. 1. During the propagation...
Please help me with several of these questions, thank you very much. 1. During the propagation of an action potential along the axon of a neuron, what is happening at the leading edge (the front) of the region of depolarization as it moves down the axon? a. Ligand-gated Na+channels are opening. b. Voltage-gated Na+channels are opening. c. Ligand-gated K+channels are opening. d. Voltage-gated Na+channels have become inactive and refractory. e. Voltage-gated Na+channels are closing. 2. During transcellular transport of glucose...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The extracellular fluid compartment b. Plasma c. The Intracellular fluid compartment 22. Why is the resting cell membrane more permeable to K+ than to Na+? a. Because gated K+ channels are always open. b. Because K+ can diffuse through the phospholipid bilayer of the resting cell membrane and Na+ cannot. c. Because the cell membrane contains Leak (ungated) K+ Channels. 23. Lipid soluble molecules, carbon...
FILL THE BLANK The membranes of fishes that live in extreme cold have a high proportion...
FILL THE BLANK The membranes of fishes that live in extreme cold have a high proportion of _________________ hydrocarbon tails, enabling them to stay fluid.For example, cold-adapted organisms such as winter wheat increase the percentage of _________________ phospholipids in their membranes in the autumn to prevent the membranes from solidifying during winter.There are two major populations of membrane proteins: ___________ and _____________.Integral proteins penetrate the hydrophobic interior of the lipid bilayer, usually completely spanning the membrane as ________________ proteins.________________ proteins...
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their concentration gradients. B. can concentrate solutes on one side of a membrane. C. require ATP-driven protein pumps. D. None of these answers are correct E. require proteins to facilitate transport.
QUESTION 20 Both passive transport and active transport A. require solutes to be transported down their concentration gradients. B. can concentrate solutes on one side of a membrane. C. require ATP-driven protein pumps. OD. None of these answers are correct E. require proteins to facilitate transport.
4. Create some drawings/models of membrane transport proteins. Blob models are fine but they should be annotated as instructed below. In your drawing include a model for a lipid bilayer clearly showing the polar and non-polar nature of the lipid components. The models of the proteins should include annotation/shading or other indication that indicates the types of amino acid functional groups you might expect to see in (a) the exterior of the protein in contact with the lipid bilayer, (b)...
When glucose moves across a phospholipid bilayer by passive transport, which factor determines the direction of its transport? Choose one: A. the charge difference across the membrane B. whether the cell is metabolically active or not C. the amount of energy available to fuel the transport process D. the concentrations of glucose on either side of the membrane
QUESTION 39 Whereas animal cells drive indirect transport across the plasma membrane with a Na+ gradient, other organisms like plants and bacteria use O A a glucose gradient B. a Ca2+ gradient C. a proton gradient D. osmosis E. endocytosis and exocytosis. Flight energy
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The extracellular fluid compartment b. Plasma c. The Intracellular fluid compartment 22. Why is the resting cell membrane more permeable to K+ than to Na+? a. Because gated K+ channels are always open. b. Because K+ can diffuse through the phospholipid bilayer of the resting cell membrane and Na+ cannot. c. Because the cell membrane contains Leak (ungated) K+ Channels. 23. Lipid soluble molecules, carbon...
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