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Questions and Answers
What allows cells to respond to a large array of different signals?
What allows cells to respond to a large array of different signals?
- Mitochondria
- Endoplasmic reticulum
- Nucleus
- Cell surface receptors (correct)
Which type of molecules cannot cross the plasma membrane?
Which type of molecules cannot cross the plasma membrane?
- Large molecules
- Hydrophobic molecules (correct)
- Hydrophilic molecules
- Small molecules
Why do most signalling molecules need to activate cell surface receptors?
Why do most signalling molecules need to activate cell surface receptors?
- Because they are hydrophobic (correct)
- Because they are large
- Because they are small
- Because they are hydrophilic
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