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1.1-1.3 Quiz
[10 marks]
1. Stargardt’s disease, a genetic disorder that causes vision loss, is being
[1 mark]
treated using retinal cells derived from human embryonic stem cells. Why
are embryonic stem cells used?
A. They are already specialized for this function.
B. They are able to differentiate into the required cell type.
C. They retain stem cell properties after specialization.
D. There are no ethical issues concerning their use.
2. Which graph represents the change in cell surface area to volume ratio
with increasing cell diameter?
[1 mark]
[Source: © International Baccalaureate Organization 2019]
3. Which is an essential feature of the Davson–Danielli model of membrane [1 mark]
A. A phospholipid monolayer with intrinsic and extrinsic proteins
B. A layer of protein sandwiched between two layers of lipid
C. A phospholipid bilayer with intrinsic and extrinsic proteins
D. A layer of lipid sandwiched between two layers of protein
4. What feature of both striated muscle and aseptate fungal hyphae is
different from typical cell structure?
[1 mark]
A. They have multiple nuclei within a structural unit.
B. They have a cell wall that is not made of cellulose.
C. They have plasmids.
D. They have an absence of cholesterol in the plasma membrane.
A diagram of a membrane
[Source: © International Baccalaureate Organization 2017]
5. In the diagram, which part of the membrane structure does the molecule [1 mark]
below form?
6. What distinguishes prokaryotic cells and eukaryotic cells?
[1 mark]
7. Which functions of life are carried out by all unicellular organisms?
A. Response, homeostasis, growth and photosynthesis
B. Metabolism, ventilation, reproduction and nutrition
C. Response, homeostasis, metabolism and growth
D. Reproduction, ventilation, response and nutrition
[1 mark]
8. Why do multicellular organisms have emergent properties?
[1 mark]
A. They have more genes than unicellular organisms.
B. Properties of unicellular organisms are enhanced by having many cells.
C. All of their genes are expressed whereas unicellular organisms express only
D. They show properties that can only result from the interaction of many cells.
9. What distinguishes prokaryotic cells from eukaryotic cells?
[1 mark]
10. The image shows an electron micrograph of a fungus, Candida albicans.
[1 mark]
Which terms identify the structures labelled I and II in the image?
© International Baccalaureate Organization 2021
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