lo Pinching off of vesicles ??.n the parent mombrane respuires w hich of the fol
ID: 281197 • Letter: L
Question
lo Pinching off of vesicles ??.n the parent mombrane respuires w hich of the following roteins (a) dy namin b) clathrin coat adaptin 11 Vesicles recognize their target membranes through which painS) of protcins? a) mamin and clathrin b) Rabs and tethering proteins ) V-SNARE and T-SNARE (d) a and b e) b andc 12. The Nar pump is an example of which of the following? (a) antiport (b) symport (c) uniport (d) none of the above 13. The glucose-Na+ pump is an example of which of the following? (a) antiport (b) symport (c) uniport (d) none of the above 14. The Na+ channel is an example of which of the following types of ion channels? (a) voltage-gated c) Stress-gated (b) ligand-gated (d) none of the above 15. Propagation of an action potential along an axon requires which of the following? (a) release of neurotransmitters (b) activation of the Ca channel (c) activation of the Na+ channel (d) formation of synaptic vesicles 16. Conversion of an electrical signal to a chemical signal at the nerve terminus does not require which of the following? (a) depolarization of the membrane (b) activation of the Cat channel (c) activation of the Na+ channel (d) formation of synaptic vesicles 17. The Acetylcholine receptor is an example of which of the following types of ion channels? (a) voltage-gated (b) ligand-gated (c) Stress-gated (d) none of the above 18. Propagation of an action potential along an axon is bi-directional (a) true 19. Where does most membrane synthesis take place in eukaryotic cells? (c) false (a) lysosome (b) ribosome (c) smooth ER (d) Golgi apparatusExplanation / Answer
Answer=
10] Pinchingg off vesicles from parent membrane requires the proteins
a] Dynamin
explaination- Each type of vesicle transports proteins from particular parent organelles.Vesicles with a clathrin coat from the plasma membrane and their final pinching off requires a GTP-binding protein ,called dynamin.
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11] Vesicles recognize their target membranes through which pair of proteins
c] V-SNARE & t-SNARE
explaination- Vesicles that recognise & fuse only with the appropriate target membrane the pairs of proteins called SNARES are important
involve in membrane fusion
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12] Na+ pump is an example of
a]Antiport
explaination-
An antiport is an integral membrane transport protein that simultaneously transports two different molecules,in opposite directions,across the membrane.
The sodium potassium pump is an example of active transport.Sodium and potassium ions are pumped in opposite directions across the membrane building up a chemical and electrical gradient for each.
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