The purpose of this homework assignment is to make you think about how a cell membrane works. A lipid bilayer forms a semi-permeable membrane that controls what molecules can enter and exit a cell. The properties of fatty acids and phospholipids permeable. key to determining which molecules are and are not are 1.a) List the characteristic(s) of molecules that can diffuse across a synthetic membrane (such as dialysis tubing) that has holes large enough for monosaccharides, but not disaccharides. to pass through. b) List the characteristic(s) of molecules that can diffuse across the lipid bilayer of a cell membrane. c) In general terms, what would you expect to be different about the permeability of a lipid bilayer made of phospholipids (modern cell) and a bilayer made of fatty acids (protocell)? d) Fill in the Table below for a cell membrane composed solely of a phospholipid bilayer and a synthetic membrane containing holes large enough to pass monosaccharaides but not disaccharides. Can diffuse across Molecule Can diffuse across Phospholipid Bilayer of Cell Membrane (Yes/No) Dialysis Tubing (plastic tubing with holes) (Yes/No) Glucose Sucrose Protons (H) RNA (polymer) 02 2. You place a dialysis bag containing 0.1 M sucrose and 0.3 M maltose (a disaccharide) in a beaker of water containing 0.4 M sucrose. Over time, does the bag expand or shrink?
The purpose of this homework assignment is to make you think about how a cell membrane works. A lipid bilayer forms a semi-permeable membrane that controls what molecules can enter and exit a cell. The properties of fatty acids and phospholipids permeable. key to determining which molecules are and are not are 1.a) List the characteristic(s) of molecules that can diffuse across a synthetic membrane (such as dialysis tubing) that has holes large enough for monosaccharides, but not disaccharides. to pass through. b) List the characteristic(s) of molecules that can diffuse across the lipid bilayer of a cell membrane. c) In general terms, what would you expect to be different about the permeability of a lipid bilayer made of phospholipids (modern cell) and a bilayer made of fatty acids (protocell)? d) Fill in the Table below for a cell membrane composed solely of a phospholipid bilayer and a synthetic membrane containing holes large enough to pass monosaccharaides but not disaccharides. Can diffuse across Molecule Can diffuse across Phospholipid Bilayer of Cell Membrane (Yes/No) Dialysis Tubing (plastic tubing with holes) (Yes/No) Glucose Sucrose Protons (H) RNA (polymer) 02 2. You place a dialysis bag containing 0.1 M sucrose and 0.3 M maltose (a disaccharide) in a beaker of water containing 0.4 M sucrose. Over time, does the bag expand or shrink?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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please answer and fill out chart for 1d. thank you
Transcribed Image Text:The purpose of this homework assignment is to make you think about how a cell membrane works. A lipid
bilayer forms a semi-permeable membrane that controls what molecules can enter and exit a cell. The
properties of fatty acids and phospholipids
permeable.
key to determining which molecules are and are not
are
1.a) List the characteristic(s) of molecules that can diffuse across a synthetic membrane (such as dialysis tubing)
that has holes large enough for monosaccharides, but not disaccharides. to pass through.
b) List the characteristic(s) of molecules that can diffuse across the lipid bilayer of a cell membrane.
c) In general terms, what would you expect to be different about the permeability of a lipid bilayer made of
phospholipids (modern cell) and a bilayer made of fatty acids (protocell)?
d) Fill in the Table below for a cell membrane composed solely of a phospholipid bilayer and a synthetic
membrane containing holes large enough to pass monosaccharaides but not disaccharides.
Can diffuse across
Molecule
Can diffuse across
Phospholipid Bilayer of
Cell Membrane (Yes/No)
Dialysis Tubing (plastic
tubing with holes) (Yes/No)
Glucose
Sucrose
Protons (H)
RNA (polymer)
02
2. You place a dialysis bag containing 0.1 M sucrose and 0.3 M maltose (a disaccharide) in a beaker
of water containing 0.4 M sucrose. Over time, does the bag expand or shrink?
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