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What processes INSIDE cells rely on the cytoskeleton for movement? movement of the chromosomes in cell division, movement of RNA in protein synthesis, separation of cytoplasm in cytokinesis.
Figure 1.1 is a transmission electron micrograph (TEM) image of a chloroplast. Explain why this image was made using a transmission electron microscope rather than a light microscope. How did you do?
Study with Quizlet and memorise flashcards containing terms like What kind of radiation is used in electron microscopes?, Why is stain used when preparing a slide?, The maximum resolution power of TEM? and others.
Describe the structure and function of the endoplasmic reticulum (ER). Cisternae: network of tubules and flattened sacs extends from cell membrane through cytoplasm and connects to nuclear envelope: - Rough ER: many ribosomes attached for protein synthesis and transport.
Name one structure present in animal cells that is not present in plant cells. The cytoskeleton in cells consists of microtubules and microfilaments. [2] Describe the roles of the cytoskeleton. [1] [3] (b). The pancreas is an organ that secretes protease enzymes.
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Dec 5, 2023 · Present in all eukaryotic cells, the nucleus is relatively large and separated from the cytoplasm by a double membrane (the nuclear envelope) which has many pores. Nuclear pores are important channels for allowing mRNA and ribosomes to travel out of the nucleus, as well as allowing enzymes (eg. DNA polymerases) and signalling molecules to ...
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Summary notes and past exam questions by topic for AQA Biology AS and A-Level Topic 2 - Cells.
