DP Biology Questionbank
1.3 Membrane structure
Path: |
Description
Nature of science: Using models as representations of the real world—there are alternative models of membrane structure. (1.11) Falsification of theories with one theory being superseded by another—evidence falsified the Davson-Danielli model. (1.9) |
|
Understandings:
|
Theory of knowledge:
Syllabus and cross-curricular links: Biology Topic 2.3 Carbohydrates and lipids Topic 2.6 Structure of DNA and RNA |
Directly related questions
- 16N.1.SL.TZ0.3: The cell membrane model proposed by Davson–Danielli was a phospholipid bilayer sandwiched between...
- 17M.1.SL.TZ2.3: What is a role of cholesterol in animal cells? A. It increases body fat. B. It controls...
-
20N.2.HL.TZ0.2a.i:
Outline how the amphipathic properties of phospholipids play a role in membrane structure.
-
22M.2.HL.TZ2.8a:
Outline four different processes, with examples, that allow substances to pass through the plasma membrane.
- 22M.1.HL.TZ2.3: Which plasma membrane is the least fluid at high temperatures?
-
22M.1.HL.TZ2.5:
Which feature(s) allow(s) transport of glucose in blood plasma?
I. It is hydrophobic.
II. It is polar.
III. Its solubility is low at 37 °C.
A. I only
B. II only
C. I and II only
D. II and III only
-
22M.2.SL.TZ2.4b:
The Davson-Danielli model of membrane structure was proposed in the 1930s. When electron micrographs of membranes were first produced, they were used as evidence for this model. The micrograph shows two adjacent membranes (indicated with arrows).
[Source: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY.]
Explain how the appearance of membranes in electron micrographs was used as evidence to support the Davson-Danielli model.
- 18N.1.SL.TZ0.4: What part of the plasma membrane is fluid, allowing the movement of proteins in accordance with...
-
18M.2.HL.TZ1.6a:
Draw a labelled diagram to show the fluid mosaic model of the plasma membrane.
- 19M.3.SL.TZ2.1c.i: Deduce one conclusion about the structure of the plasma membrane reached by the scientists from...
- 17M.2.HL.TZ1.5b: Outline four different functions of membrane proteins.
- 20N.2.HL.TZ0.2a.ii: State the role of cholesterol in animal cell membranes.
-
21N.1.SL.TZ0.1:
The image shows part of a mammalian cell.
[Source: Louisa Howard, Katherine Connollly - Dartmouth Electron Microscope Facility. Available at:
https://en.wikipedia.org/wiki/File:Microvilli.jpg.]What is the specialized function of this mammalian cell?
A. Locomotion
B. Absorption
C. Reception of stimuli
D. Gas exchange
- 22M.1.SL.TZ1.2: More than 90 % of cellular cholesterol is located in the cell’s plasma membrane. What is the main...
- 19M.2.SL.TZ1.7b: Describe the functions of proteins in cell membranes.
-
19M.3.SL.TZ2.1b.ii:
Label the model B diagram to show a phospholipid.
-
19M.3.SL.TZ2.1b.i:
Label the model A diagram to show a region of protein.
- 19N.2.HL.TZ0.4a.i: State the property of amphipathic phospholipids that enables them to form a bilayer.
- 17M.1.SL.TZ1.21: Cladograms can be created by comparing DNA or protein sequences. The cladogram on the left is...
- 17N.1.SL.TZ0.04: In the diagram, which structure is an intrinsic or integral protein?
- 18M.2.HL.TZ2.5a: Discuss alternative models of membrane structure including evidence for or against each model.
- 19M.1.HL.TZ1.3: Which is an essential feature of the Davson–Danielli model of membrane structure? A. A...
- 19M.3.SL.TZ1.1c: Explain how the amphipathic nature of phospholipids allows them to form bilayers.
- 19M.2.HL.TZ1.5c: Explain how hydrophobic and hydrophilic properties contribute to the arrangement of molecules in...
- 19M.3.SL.TZ2.1d: State one technological improvement, other than enzymatic digestion, that led to the...
- 17M.1.SL.TZ2.27: The bacterium Neisseria gonorrhoeae causes infections related to the human reproductive system....
- 17M.1.HL.TZ1.2: Which evidence falsifies the Davson–Danielli model? I. The presence of globular proteins within...
-
20N.2.SL.TZ0.3a:
Outline how the amphipathic properties of phospholipids play a role in membrane structure.
-
18M.2.SL.TZ2.5a:
Draw an annotated diagram of the fluid mosaic model of membrane structure.
- 19M.3.SL.TZ2.1a: State the scientists who proposed model A.
- 19N.2.SL.TZ0.5a: Draw a section of the Singer-Nicolson model of an animal cell membrane.
- 17N.1.SL.TZ0.05: In the diagram, which part of the membrane structure does the molecule below form?
- 21M.1.SL.TZ1.6: Which statement applies to cholesterol? A. It is hydrophobic and found on the outside of the...
- 18M.1.SL.TZ2.3: Which molecule regulates the fluidity of cell membranes? A. Phospholipid B. Cholesterol C....
- 19M.3.SL.TZ1.1b: Explain how electron micrographs such as this helped to falsify the Davson–Danielli model of...
- 19M.3.SL.TZ2.1c.ii: Suggest one reason for maintaining a pH of 7.5 throughout the experiment.
- 21M.1.SL.TZ2.3: What special property of phospholipid molecules explains their ability to spontaneously assemble...
-
21M.1.SL.TZ1.3:
The Davson–Danielli model of membrane structure proposed that membranes were composed of a phospholipid bilayer that lies between two layers of globular proteins, as shown in this diagram.
[Source: Cornell, B. 2016. https://ib.bioninja.com.au/standard-level/topic-1-cell-biology/13-membrane-structure/membrane-models.html]
What evidence supported this model?
A. An electron micrograph that showed two dark lines with a lighter band in between
B. Freeze-fracture electron microscopy
C. Evidence that all membranes are identical
D. The hydrophobic regions of protein would be in contact with water
-
18M.2.SL.TZ1.5a:
Draw a labelled diagram to show the fluid mosaic model of the plasma membrane.
-
19M.3.SL.TZ1.1a:
Using the scale bar, calculate the magnification of the image.
- 17M.2.SL.TZ1.1c: Estimate how much smaller drilled oysters raised in seawater at a high CO2 concentration were...
- 17M.2.HL.TZ1.1f.ii: Suggest a reason for the greater expression of the gene for the urea transporter after an...
- 21N.1.SL.TZ0.2: Which features of phospholipids give them their amphipathic properties? A. Basic phosphate...