Biology B2/ DNA, CELLS, MICROSCOPY 0.0 / 5 ? BiologyCells & MicroscopyDNAGCSEEdexcel Created by: Tend The RabbitsCreated on: 13-05-15 21:51 things in an animal cell? 1 of 16 What is the Cytoplasm in a plant and animal cell? Cytoplasm: A gel like substance Most chemical reactions happen here Contains organelles (structures that carry out specific jobs) 2 of 16 Things in a plant cell? and Mitochondria 3 of 16 Difference between Animal Cell and Plant Cell? 4 of 16 What are the three extra things in a plant cell, a Cell wall: Strengthens the cell/gives support Made of cellulose Chloroplasts Contain chlorophyll photosynthesis occurs absorbs light energy for photosynthesis Large vacuole Filled with cell sap -weak solution of sugar and salts 5 of 16 Role of Mitochondria in plant and animal cell? Mitochondria Most of the reactions for respiration take place here. Respiration releases energy, cells need this to work 6 of 16 Role of cell membrane in plant and animal cell? Cell membrane Holds cell together Controls what goes in and out 7 of 16 Structure of a bacterial cell? 8 of 16 What is Chromosomal DNA in a bacterial cell? Chromosomal DNA: Controls cell's activities and replication floats free in the cytoplasm (not in the nucleus) 9 of 16 what are plasmids in a bacterial cell? Plasmids: Small loops of extra DNA aren't part of the chromosone contain genes for things like drug resistance -can be passed between bacteria 10 of 16 What is the role of the flagellum? Flagellum: Long hair-like structure rotates to make the bacterium move 11 of 16 How do you work out magnification? Magnicfication= Length of image/ length of specimen 12 of 16 What is the structure of DNA? DNA Double helix: two strands coiled together Paired bases Chemicals=bases: hold the strands together 13 of 16 What are paired bases? There are 4 different bases that pair up: Adenine and Thymine: AT Cytosine and Guanine: CG The base pairs are joined by weak hydrogen bonds 14 of 16 What is a gene? gene: A section of DNA Sequence of bases in a gene code for a specific potein/ carries an instruction 15 of 16 Function of each part of a microscope? 16 of 16
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