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Plant cells contain chloroplasts (1), a cell wall (1) and a permanent vacuole (1). These structures are absent from animal cells. Chloroplasts contain chlorophyll which abso...
Competitive inhibitor molecules are a similar shape to the substrate that fits into the enzyme's active site. The competitive inhibitor competes with the substrate molecules to fit into and bind to the ac...
During Meiosis I: Metaphase I
By the transpiration stream, in the xylem.The xylem is the tube in the plant in which water and solutes are transported from the plant roots to the stem and leaves. The xylem allows capillary action, whic...
(1) An impulse causes calcium ions to enter the axon. (2) Vesicles fuse with the presynaptic membrane. (3) This causes the release of acetylcholine. (4) Acetylcholine diffuses across the synaptic cleft. (...
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