of the factors which effect the permeability of cell membranes to molecules that cross by simple...
of the factors which effect the permeability of cell
membranes to molecules that cross by simple diffusion, which of the
following has the strongest influence on permeability
Homework Answers
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of the factors which effect the permeability of cell
membranes to molecules that cross by simple...
1 Label the following diagram Molecules cross cell membranes by by passive transport |(a) Active may...
1 Label the following diagram Molecules cross cell membranes by by passive transport |(a) Active may be moving down moving against requires (b) ATP uses diffusion (d) uses (e) of of (c) polar molecules and ions 2- List the five properties/characteristics of enzymes:
Biological membranes are selectively permeable, allowing certain molecules to cross the membrane, but not others. Classify...
Biological membranes are selectively permeable, allowing certain molecules to cross the membrane, but not others. Classify the molecules or ions depending on how they cross a biological membrane. Note that some of these examples may also utilize active transport to traverse a membrane. However, this question is limited to passive transport processes only. Simple Diffusion Facilitated Diffusion Answer Bank steroid hormones eroid hormones K r reting etinol N, glacene
The majority of water molecules moving across plasma membranes by osmosis do so via a process...
The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to _______ facilitated diffusion cotransport simple diffusion active transport a process that requires energy from the cell
63. is able to cross membranes, but is not very water soluble. can't cross membranes, but...
63. is able to cross membranes, but is not very water soluble. can't cross membranes, but is very water soluble. This helps explain CO2 transport by blood. a. Carbon dioxide / Bicarbonate b. Bicarbonate / Carbon dioxide 64. Which of the following is not true concerning the hemoglobin molecule? a. it is found at high concentrations inside erythrocytes b. it contains 4 iron atoms d. it contains 4 heme molecules c. it can bind 4 O2 molecules e. four CO2...
List three characteristics that influence the rate of simple diffusion of small molecules.
List three characteristics that influence the rate of simple diffusion of small molecules.
Which of the following molecules would be most likely to cross the cell membrane without assistance...
Which of the following molecules would be most likely to cross the cell membrane without assistance from embedded proteins? potassium ion (K+) sodium ion (Na+) Vitamin D. a fat soluble vitamin glucose
6. Lipid-soluble signaling molecules, such as testosterone, cross the plasma membranes of all cells A) by...
6. Lipid-soluble signaling molecules, such as testosterone, cross the plasma membranes of all cells A) by diffusion but affect only target cells because only target cells retain the appropriate DNA segments. B) by diffusion but affect only target cells because only target cells have the intracellular receptors for testosterone. C) through hydrophilic channels of transmembrane proteins but affect only target cells because only target cells retain the appropriate DNA segments. D) through hydrophilic channels of transmembrane proteins but affect only...
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...
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic...
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic of all a. Channel proteins can assist polar molecules to cross the plasma membrane by facilitated diffusion b. The gated ion channel can allow ions to pass when stimulated to open. c. The surface of a channel protein in contact with the bilayer would likely have hydrophilic amino acids d. Water plays a role in determining which ions are allowed to pass through an...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed in for it to become lysed? [1 mark] b) Give an example of a transmembrane protein. [1 mark] c) Which form of membrane transport does NOT require the expenditure of energy by the cell? [1 Mark] d) Given a cell with concentration of solutes in the environment lesser than the concentration of solutes in the surrounding fluid.. i. the extracellular fluid is said to...
1 Label the following diagram Molecules cross cell membranes by by passive transport |(a) Active may be moving down moving against requires (b) ATP uses diffusion (d) uses (e) of of (c) polar molecules and ions 2- List the five properties/characteristics of enzymes:
Biological membranes are selectively permeable, allowing certain molecules to cross the membrane, but not others. Classify the molecules or ions depending on how they cross a biological membrane. Note that some of these examples may also utilize active transport to traverse a membrane. However, this question is limited to passive transport processes only. Simple Diffusion Facilitated Diffusion Answer Bank steroid hormones eroid hormones K r reting etinol N, glacene
63. is able to cross membranes, but is not very water soluble. can't cross membranes, but is very water soluble. This helps explain CO2 transport by blood. a. Carbon dioxide / Bicarbonate b. Bicarbonate / Carbon dioxide 64. Which of the following is not true concerning the hemoglobin molecule? a. it is found at high concentrations inside erythrocytes b. it contains 4 iron atoms d. it contains 4 heme molecules c. it can bind 4 O2 molecules e. four CO2...
Which of the following molecules would be most likely to cross the cell membrane without assistance from embedded proteins? potassium ion (K+) sodium ion (Na+) Vitamin D. a fat soluble vitamin glucose
6. Lipid-soluble signaling molecules, such as testosterone, cross the plasma membranes of all cells A) by diffusion but affect only target cells because only target cells retain the appropriate DNA segments. B) by diffusion but affect only target cells because only target cells have the intracellular receptors for testosterone. C) through hydrophilic channels of transmembrane proteins but affect only target cells because only target cells retain the appropriate DNA segments. D) through hydrophilic channels of transmembrane proteins but affect only...
09. Which of the followine statements regarding channel proteins (shown below (shown below) is for propratic of all a. Channel proteins can assist polar molecules to cross the plasma membrane by facilitated diffusion b. The gated ion channel can allow ions to pass when stimulated to open. c. The surface of a channel protein in contact with the bilayer would likely have hydrophilic amino acids d. Water plays a role in determining which ions are allowed to pass through an...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed in for it to become lysed? [1 mark] b) Give an example of a transmembrane protein. [1 mark] c) Which form of membrane transport does NOT require the expenditure of energy by the cell? [1 Mark] d) Given a cell with concentration of solutes in the environment lesser than the concentration of solutes in the surrounding fluid.. i. the extracellular fluid is said to...
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