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TEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION || CHAPTERS 5||FULL COMPLETE||LATEST 2024
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TEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION || CHAPTERS 5||FULL COMPLETE||LATEST 2024
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ESTUDYTEST BANK FOR CAMPBELL BIOLOGY 12TH EDITION
|| CHAPTERS 2||FULL COMPLETE||LATEST
### Cell Membrane and Transport Questions
1. **Which cell structure allows selective permeability between a cell and its external environment?**
a) Nucleus
b) Cytoplasm
c) Plasma membrane
d) Ribosomes
**✔✔ - ANSWER**: c) Plasma membrane
2. **What is a correct statement about phospholipids in biological membranes?**
a) They form a rigid structure.
b) They create a selectively permeable barrier.
c) They are only found on the outside of the membrane.
d) They do not influence membrane properties.
**✔✔ - ANSWER**: b) They create a selectively permeable barrier.
3. **Which statement about the fluid mosaic model is true?**
a) Membranes are solid structures.
b) Phospholipids do not move in the membrane.
c) Embedded proteins create a mosaic appearance, while phospholipids allow fluidity.
d) The membrane is only made of proteins.
**✔✔ - ANSWER**: c) Embedded proteins create a mosaic appearance, while phospholipids allow
fluidity.
4. **Where would cholesterol most likely be found in the plasma membrane?**
a) On the outer surface
b) In the cytoplasm
c) Between phospholipid molecules
d) Attached to carbohydrates
**✔✔ - ANSWER**: c) Between phospholipid molecules
5. **Which functional process is NOT a result of proteins in biological membranes?**
a) Intercellular joining
b) Cell-cell recognition
c) Enzymatic activity
, ESTUDY
d) Energy storage
**✔✔ - ANSWER**: d) Energy storage
*Feedback: Proteins in membranes do not act as energy stores.*
6. **What is a correct statement about carbohydrates in the plasma membrane?**
a) They do not play any role.
b) They help with cell-cell recognition.
c) They are found on the inside of the membrane.
d) They provide energy storage.
**✔✔ - ANSWER**: b) They help with cell-cell recognition.
7. **Where would carbohydrates be located in the fluid mosaic model of the membrane?**
a) On the inside surface
b) In the lipid bilayer
c) On the outside surface
d) Only in the cytoplasm
**✔✔ - ANSWER**: c) On the outside surface
8. **Which statements about the sidedness of the plasma membrane are correct?**
a) Proteins are the same on both sides of the membrane.
b) Every integral protein has a specific orientation.
c) Membrane components are distributed asymmetrically.
d) All of the above statements are correct.
**✔✔ - ANSWER**: d) All of the above statements are correct.
9. **Which molecule is most likely to passively diffuse across the plasma membrane?**
a) Water
b) Carbon dioxide
c) Glucose
d) Large polar molecules
**✔✔ - ANSWER**: b) Carbon dioxide
10. **Which molecule would be least likely to diffuse through a plasma membrane without help?**
a) Small nonpolar molecule
b) Carbon dioxide
c) Large polar molecule
d) Water
**✔✔ - ANSWER**: c) Large polar molecule
11. **What structural arrangement in biological membranes supports selective permeability?**
a) Proteins scattered in a lipid layer
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