Homework Answers
Remember that passive transport is the natural diffusion of molecules across the membrane, it does not requires energy thus it is always occurring down the concentration gradient. It sometimes use proteins as channels but not always, some other times the molecules just diffuse through the membrane.
Active transport is all the opposite, it requires energy thus it works against the concentration gradient, it always requires channel proteins to occur.
The answer is option D. None of these answers are correct
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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...
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 2 Which is true of both symporters and antiporters? O Both solutes move up their...
QUESTION 2 Which is true of both symporters and antiporters? O Both solutes move up their concentration gradient. Both solutes move down their concentration gradients. Both require energy to function. • one solute moves down its concentration gradient while the other moves up QUESTION 3 What is the correct order of permeability for the following four substances across a pure phosopholipid bilayer? • 02 > ethanol > Na+ > ATP Na+ > ethanol > 02 > ATP 02> Na+ >...
47. Active transport of solutes is mediated by and in plant and animal cells, respectively A....
47. Active transport of solutes is mediated by and in plant and animal cells, respectively A. H-pump and Ca-pump B. K-pump and Ca-pump C. Na-pump and H'-pump D. H-pump and Na"-pump E. C & D 48. One is NOT TRUE about integral membrane proteins. A. They can move inside the lipid bilayer B. Their hydrophobic amino acid side chains face the lipid bilayer C. Their hydrophilic amino acids form the hydrophilic pore D. They can easily by separated from the...
Which of the following statements on membrane transport is NOT correct: A. To transport of solutes...
Which of the following statements on membrane transport is NOT correct: A. To transport of solutes in the unfavorable direction across the membrane, pumps couple the process with either ATP hydrolysis, light absorption, electron transport, orother favorable transport process. B. Dissolved gases like O2, CO2, or NO simply diffuse across a membrane bilayer C. Hydrophilic molecules require assistance by membrane proteins to cross the membrane bilayer. D. The rate of transport facilitated by transporters is faster, but less selective for...
Please summarize this chapter typed clearly. Diffusion Is a passive process of transport. A single substance...
Please summarize this chapter
typed clearly.
Diffusion Is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across a space. Facilitated transport Facilitated diffusion is the process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins. Channels The integral proteins involved in facilitated transport are collectively referred to as transport proteins, and they...
QUESTION 31 Phagocytosis is a more energy intensive form of bulk transport compared to endocytosis. Why...
QUESTION 31 Phagocytosis is a more energy intensive form of bulk transport compared to endocytosis. Why is this A phagocytosis is powered by ATP-driven pumps. B. Endocytosis is a passive process that only requires the self-assembly of protein coats on vesicles, no energy is expended. C. All of these answers are correct D. None of these answers are correct E. Phagocytosis requires significant restructuring of the cytoskeleton
Question 1 Which of the following are likely to diffuse through the plasma membrane? glucose K+...
Question 1 Which of the following are likely to diffuse through the plasma membrane? glucose K+ Cl- H20 Na+ CO2 02 lipid Question 4 Which is(are) true about transport across the membrane? Channels can perform either active or passive transport Charged molecules move according to their electrochemical gradients Movement of an ion down its gradient requires energy Transporters are faster but less selective than channels Question 6 In the coupled transport of Na+ and glucose, the transporter O is an...
Question 24 Which of the following categories of membrane proteins is most likely to have restricted...
Question 24 Which of the following categories of membrane proteins is most likely to have restricted lateral mobility in a membrane? enzyme transporter O anchor O receptor all are restricted Question 5 New membrane synthesis occurs by spontaneous aggregation of free phospholipids into a new bilayer incorporation of phospholipids into one face of a preexisting membrane and their specific redistribution by enzymes like flippases incorporation of phospholipids into both faces of a preexisting membrane at the same time formation of...
Active transport requires and in order to function correctly. • A. nucleic acids, membrane proteins e...
Active transport requires and in order to function correctly. • A. nucleic acids, membrane proteins e B. energy, peripheral proteins C. energy, membrane pxoteins D. energy, nucleic acids Which of the following is not a Eukaryote? A. Oak tree B. Bacteria C. Human D. Mushroom A neuron has many short thin fibers called and a single long • A. Dendrites, Axon B. Receptors, Nerve fiber C. Axons, Dendrite D. Myelin sheaths, Cell body • Bacteria can be described as: I....
Which can power the active transport of a molecule? Choose all correct answers. The energy of...
Which can power the active transport of a molecule? Choose all correct answers. The energy of ATP hydrolysis. The energy released by a second (different) molecule moving from high concentration to low concentration. The inherent energy released by the molecule being transported moving from high concentration to low concentration Question 2 1 pts Which of the following types of membrane diffusion happens slower? Transverse diffusion Lateral diffusion
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 2 Which is true of both symporters and antiporters? O Both solutes move up their concentration gradient. Both solutes move down their concentration gradients. Both require energy to function. • one solute moves down its concentration gradient while the other moves up QUESTION 3 What is the correct order of permeability for the following four substances across a pure phosopholipid bilayer? • 02 > ethanol > Na+ > ATP Na+ > ethanol > 02 > ATP 02> Na+ >...
47. Active transport of solutes is mediated by and in plant and animal cells, respectively A. H-pump and Ca-pump B. K-pump and Ca-pump C. Na-pump and H'-pump D. H-pump and Na"-pump E. C & D 48. One is NOT TRUE about integral membrane proteins. A. They can move inside the lipid bilayer B. Their hydrophobic amino acid side chains face the lipid bilayer C. Their hydrophilic amino acids form the hydrophilic pore D. They can easily by separated from the...
Please summarize this chapter
typed clearly.
Diffusion Is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across a space. Facilitated transport Facilitated diffusion is the process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins. Channels The integral proteins involved in facilitated transport are collectively referred to as transport proteins, and they...
QUESTION 31 Phagocytosis is a more energy intensive form of bulk transport compared to endocytosis. Why is this A phagocytosis is powered by ATP-driven pumps. B. Endocytosis is a passive process that only requires the self-assembly of protein coats on vesicles, no energy is expended. C. All of these answers are correct D. None of these answers are correct E. Phagocytosis requires significant restructuring of the cytoskeleton
Question 1 Which of the following are likely to diffuse through the plasma membrane? glucose K+ Cl- H20 Na+ CO2 02 lipid Question 4 Which is(are) true about transport across the membrane? Channels can perform either active or passive transport Charged molecules move according to their electrochemical gradients Movement of an ion down its gradient requires energy Transporters are faster but less selective than channels Question 6 In the coupled transport of Na+ and glucose, the transporter O is an...
Question 24 Which of the following categories of membrane proteins is most likely to have restricted lateral mobility in a membrane? enzyme transporter O anchor O receptor all are restricted Question 5 New membrane synthesis occurs by spontaneous aggregation of free phospholipids into a new bilayer incorporation of phospholipids into one face of a preexisting membrane and their specific redistribution by enzymes like flippases incorporation of phospholipids into both faces of a preexisting membrane at the same time formation of...
Active transport requires and in order to function correctly. • A. nucleic acids, membrane proteins e B. energy, peripheral proteins C. energy, membrane pxoteins D. energy, nucleic acids Which of the following is not a Eukaryote? A. Oak tree B. Bacteria C. Human D. Mushroom A neuron has many short thin fibers called and a single long • A. Dendrites, Axon B. Receptors, Nerve fiber C. Axons, Dendrite D. Myelin sheaths, Cell body • Bacteria can be described as: I....
Which can power the active transport of a molecule? Choose all correct answers. The energy of ATP hydrolysis. The energy released by a second (different) molecule moving from high concentration to low concentration. The inherent energy released by the molecule being transported moving from high concentration to low concentration Question 2 1 pts Which of the following types of membrane diffusion happens slower? Transverse diffusion Lateral diffusion
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