1. Acetylcholine causes the opening of which channel in the post-synaptic membrane?
- Calcium ion channel
- Sodium ion channel
- Potassium ion channel
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Other questions in this quiz
2. The act of  binding to a receptor on  causes a conformational change, releasing the  molecule, allowing  to bind to  in the nucleus and initiate transcription.
- 1: DNA, 2: transcriptional factor, 3: inhibitor, 4: oestrogen
- 1: oestrogen, 2: a transcriptional factor, 3: inhibitor, 4: DNA
- 1: a transcriptional factor, 2: DNA, 3: inhibitor, 4: oestrogen
3. Slow twitch fibres contain:
- Large stores of myoglobin and glycogen, many mitochondria and a rich blood supply
- Large stores of phosphocreatine, and high concentrations of enzymes used in anaerobic respiration
4. The second messenger model, as applied to the action of adrenaline, is:
- Adrenaline binds to cell-surface receptors, causing an enzyme on the inside of the cell membrane to activate and convert ATP into cAMP, which then acts as a second messenger, activating enzymes responsible for glycogenolysis
- Adrenaline reacts with ATP to form cAMP and glycerol, then the cAMP acts as a second messenger, causing the activation of enzymes responsible for glycogenolysis
- Adrenaline binds to cAMP, forming the adrenaline-cAMP complex, acting as a second messenger to activate the enzymes responsible for glycogenolysis
5. During translation, there are x tRNA molecules paired to the mRNA molecule and being operated on by a ribosome, and as many as y ribosomes operating on the mRNA. xy ~ ?
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