Cells 0.0 / 5 ? BiologyCellular processes and structureASAQA Created by: Imogen-198Created on: 14-05-16 18:54 What is a eukaryotic cell? A complex cell with a nucleus 1 of 37 What is a prokaryotic cell? A single called organism without a nucleus 2 of 37 How is cristae in mitochondria formed? The inner membrane is deeply folded 3 of 37 What is the purpose of cristae? It increases the surface area for enzymes involved in respiration within mitochondria 4 of 37 Is a chloroplast single or double membraned? Double 5 of 37 What is the double membrane within chloroplasts made from? Thylakoid membranes 6 of 37 How are the granum formed within chloroplasts They are formed when thylakoids membranes stack up 7 of 37 Where are stroma found? Chloroplasts 8 of 37 What are storms within the chloroplasts? Fluid filled matrix 9 of 37 What is the function of the nucleus? It protects the genetic material and has pores to allow molecules in and out 10 of 37 "Chloroplasts have their own DNA and ribosomes to make enzymes needed for photosynthesis". True or False? True 11 of 37 Function of the nucleolus? Makes ribosomes 12 of 37 What is a lysome and its function It is a membrane bound sac which contains digestive enzymes 13 of 37 What is a vesicle? Membrane bound sac which allows molecules to be transported 14 of 37 Function of the Golgi body? Packages and modifies materials to produce vesicles 15 of 37 Function of the centrioles? Makes spindle fibres for all cell division 16 of 37 Function of the smooth Endoplasmic reticulum? Produces lipids and steroids 17 of 37 Function of the rough Endoplasmic reticulum? Site of complex protein synthesis, with ribosomes attached to its surface 18 of 37 What is an algal cell? It's contains all of the same organelles as plant cells. They are unicellular or multicellular organisms. 19 of 37 What does a eukaryotic cell contain? Nucleus, nucleolus, ribosome, lysosome, vesicles, Golgi body, smooth and rough Endoplasmic reticulum 20 of 37 What is the purpose of a cellulose cell wall? Resists stretching and tearing due to osmotic pressure, this protects the cell against osmotic lysis 21 of 37 What is the plant vacuole? It contains cell sap, can hold up to 90% water and is responsible for the turgidity property of the cell. 22 of 37 What are the features of a prokaryotic cell DNA is circular and associated with proteins, it contains no membrane bond organelles and 70s organelles. 23 of 37 What are the features of a bacteria cell? Flagellum, plasmids, mesosomes, a cell wall made of meurin and a slime capsule 24 of 37 What is a flaggellum and where is it found? Within bacteria cells, it rotates to make the cell move. 25 of 37 What are plasmids? Small loops of DNA 26 of 37 Function of mesosomes? Site of aerobic respiration 27 of 37 Function of slime capsules Prevents dessication (protects from outside influence) 28 of 37 What are the features of a fungal cell? Cell wall made of chitin, they don't have chloroplasts so do not photosynthesise 29 of 37 Define resolution The ability to distinguish between objects that are close together 30 of 37 How do you improve resolution? Shorten the wavelength 31 of 37 What effect does increasing magnification have on resolution? It decreases 32 of 37 What is homogenisation It breaks the plasma membrane and releases organelles into solution 33 of 37 Why use an ice cold solution? It reduces enzyme action which may damage the cell 34 of 37 Why use an isotonic solution? Prevents the organelle shriviling or bursting from the net movement of water via osmosis 35 of 37 Why use a buffered solution? Prevents pH change which could denature proteins. 36 of 37 Why is the solution filtered? Removes any large pieces of tissue not broken up by the homogeniser 37 of 37
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