What is cell signalling - Study guides, Class notes & Summaries

AQA GCSE Biology - Paper 1 Rated A+ What does a nucleus do? ️It contains genetic material and controls the activities of the cell What does cytoplasm do? ️It's a gel-like substance where most of the chemical reactions happen. It contains enzymes that control these chemical reactions What does a cell membrane do? ️It holds the cell together and controls what goes in and out What do mitochondria do? ️These are where most of the reactions for aerobic respiration occur. Respirat...

What is the MAIN role of membranes and what are the other roles? - ANSWER - COMPARTMENTALISATION -site of chemical reactions -cell signalling -cell adhesion How do cell membranes compartmentalise? - ANSWER Membranes are hydrophobic layers that separate different regions of substances dissolved in water. This hydrophobic layer acts as a barrier preventing the movement of hydrophilic molecules from one region to another. It keeps one compartment separate from another. What are the 3 examp...

What are the 5 well-known enzyme-linked cell surface receptors? - 1. Receptor Guanylyl Cyclase: produces cGMP 2. RTK: phosphorylate tyrosine residues leading to association of signalling molecules and cascade 3. TK Associated Receptors: associate with proteins having TK activity 4. Receptor Tyrosine Phosphates: Removes phosphate on tyrosine residues 5. Receptor Serine/Threonine Kinases: phosphorylate specific Serine/Threonine residues on IC signalling molecules How are RTK and TK Ass...

AQA GCSE Biology - Paper 1 Exam Questions With 100% Correct Answers What does a nucleus do? - answerIt contains genetic material and controls the activities of the cell What does cytoplasm do? - answerIt's a gel-like substance where most of the chemical reactions happen. It contains enzymes that control these chemical reactions What does a cell membrane do? - answerIt holds the cell together and controls what goes in and out What do mitochondria do? - answerThese are where most of the r...

BIOL 1P91 – Final EXAM .OVER 280 QUESTIONS WITH VERIFIED CORRECT ANSWERS Holds the cell together and controls what goes in and out - ANSWER cell membrane separates cell contents from the surrounding environment - ANSWER plasma membrane uptake and export of ions and molecules, cell compartmentalization, protein storing, anchoring cytoskeleton, production of ATP and NADPH, cell signalling, cell and nuclear division, and adhesion of cells to each other and to the extracellular...

What is cell signalling? correct answer: "Transduction of message(s) from one cell to another cell resulting in altered behaviour of target cell" What are the basic requirements of cell signalling? correct answer: 1. Signalling cell. 2. Extracellular ligand (signalling molecule). 3. Target (responding) cell. 4. Receptor (on plasma membrane or intracellular) Illustrate a general schematic of cell signaling correct answer: What are the 3 types of signalling? correct answer: 1. Endo...

Signal Transduction - The process of converting signals from one form to another. In cells: Extracellular signaling molecule --> receptor --> intracellular signaling molecules --> effector proteins Extracellular Signaling Molecules - this type of signaling molecule comes from outside of the cell, and can come in many different forms Receptor - this is a generic term for what binds a ligand Intracellular signaling molecule - as a result of a receptor being bound, this is released in...

PHAR 100 EXAM REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)|AGRADE Who discovered morphine? - Answers - Serturner From what drug was ephedrine isolated? - Answers - Ma Huang What does ephedrine treat? - Answers - asthma What are the two uses of curare? - Answers - 1. Poison: used on arrow tips to cause muscle paralysis and death by respiratory paralysis 2. Drug: anesthetics during surgery to relax muscles What is Ergot? - Answers - a poisonous fungus that grows on th...

when cells respond to an extracellular signal, they most often convert the information carried by this molecule from one form to another. What is this process called? - Answer-signal transduction When does signal transduction begin? - Answer-when the receptor on a target cell recieves and incoming extracellular signal and then produces intracellular signaling molecules that alter cell behavior extracellular signal molecules, released locally example: inflammation regulation at site of infe...

why do specimens need to be thin when observing them under a light microscope? - to allow light to pass through identify and explain the starch test - add iodine dissolved in potassium iodide solution to the sample - positive test = blue-black - negative test = orange-brown why is the structure of the plasma membrane often referred to as the fluid mosaic model? - - the continuous bilayer is 'fluid' as the phospholipid molecules are constantly moving - protein molecules are scattered thr...