WebTest yourself and check your progress using our topic questions, so you know exactly what to expect on exam day. Tailored questions — for specific GCSE, IGCSE, IB and A Level exams. 70,000+ exam questions — organised by topic and sub-topic. Downloadable — print off your test and work offline. Easy, Medium and Hard — challenge yourself ... Webbiomembrane: [ bi″o-mem´brān ] any membrane, e.g., the cell membrane, of an organism. adj., adj biomem´branous.

Past Paper Topic Questions OCR A Level Biology Pages - Save My Exams

WebCREDIT creates gaps in membrane ACCEPT holes for gaps IGNORE ref to pores, ref to gaps created by proteins denaturing IGNORE membrane / phospholipids become more … WebFound in all eukaryotic cells. Makes up the cytoskeleton of the cell about 25 nm in diameter. Made of α and β tubulin combined to form dimers, the dimers are then joined into protofilaments. Thirteen protofilaments in a cylinder make a microtubule. The cytoskeleton is used to provide support and movement of the cell. hiddenlistings cancel

2.5.8 Osmosis in Animal & Plant Cells - Save My Exams

WebAs water leaves the vacuole of the plant cell, the volume of the plant cell decreases. The protoplast gradually shrinks and no longer exerts pressure on the cell wall. As the protoplast continues to shrink, it begins to pull away from the cell wall. This process is known as plasmolysis – the plant cell is plasmolysed. WebQuestion 1a. A student investigated the uptake of two different substances in cultured cells. The rate of uptake was measured at different … hiddenlistings membership