B4 Definitions 4.5 / 5 based on 2 ratings ? BiologyB4GCSEOCR Created by: mazzamarmarCreated on: 16-05-16 15:06 Mitochondria Contain enzymes to carry out respiration and this is where energy is made inside a cell 1 of 23 Cell Membrane Allows gases and water to pass in and out of the cell 2 of 23 Nucleus Contains DNA which carries the genetic code for making enzymes 3 of 23 Cytoplasm Liquid part of the cell where to enzymes and other proteins are made 4 of 23 Animal Cells Made up of a nucleus, cell membrane and cytoplasm 5 of 23 Plant Cells Made up of nucleus, cell membrane, cytoplasm, chloroplasts, vacuole and cell wall 6 of 23 Chloroplasts Contain chlorophyll and the enzymes for the reactions in photosynthesis 7 of 23 Respiration A chemical reaction that takes place inside a cell that releases energy 8 of 23 Photosynthesis A chemical reaction that takes place inside plant cells that makes glucose (carbon dioxide + water = glucose + oxygen) 9 of 23 Aerobic Respiration Takes place in animal and plant cells and some microorganisms, and requires oxygen 10 of 23 Anaerobic Respiration Takes place in animal, plant and some microbial cells in conditions of low oxygen or absence of oxygen 11 of 23 Limiting Factors Factors such as temperature, sunlight and carbon dioxide that limit the rate of photosynthesis 12 of 23 Chlorophyll The green pigment found in chloroplasts which absorbs sunlight 13 of 23 Enzymes Proteins that speed up chemical reactions 14 of 23 Optimum The best conditions for enzymes to work at 15 of 23 The lock and key model Molecules have to be the correct shape to fit into the active site of the enzyme 16 of 23 Denature The shape of the enzyme changes if the temperature is too high and the enzyme stops working and cannot go back 17 of 23 Active Site The surface of the enzyme that fits into the substrate 18 of 23 Passive Requires no energy 19 of 23 Diffusion Is the passive overall movement of molecues from a region of their higher concentration to a region of their lower concentration 20 of 23 Osmosis Is the overall movement of water from a dilute to a more concentrated solution through a partially permeable membrane 21 of 23 Partially Permeable Membrane A cell membrane which allows only certain substances through it 22 of 23 HT Active Transport Is the overall movement of chemicals across a cell membrane requiring energy from respiration 23 of 23
Comments
No comments have yet been made