Cell Structure and Function MCQ Quiz: GKFix - Bridge of Knowledge - Page 249

Question 1241

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Which of the following is a key feature of active transport?

No energy required
Uses vesicles only
Always involves water
Movement against the concentration gradient

Question 1242

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What is the function of gap junctions in animal cells, analogous to plasmodesmata in plant cells?

To anchor cells together
To prevent water loss
To synthesize proteins
To allow direct communication between cells

Question 1243

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What is the main reason why large polar molecules cannot pass through the membrane via simple diffusion?

They are too light
They are always positively charged
They are insoluble in water
They are repelled by the hydrophobic core

Question 1244

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Which of the following is NOT a function of the cell wall in plants?

Providing structural support
Preventing pathogen entry
Regulating water uptake
Carrying out cellular respiration

Question 1245

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Which of the following is a correct description of the plasma membrane's structure?

Single layer of proteins
Triple layer of carbohydrates
Solid protein matrix
Double layer of phospholipids with embedded proteins