LQB182 FINAL| QUESTIONS WITH COMPLETE SOLUTIONS

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What are the bonds that hold elements together? From strongest to weakest. Correct Answer: - Covalent bond - Ionic Bond - Hydrogen Bond - Van Der Waal's forces What is one of the main functions... of Cysteine as an amino acid? Correct Answer: Formation of Di-sulphide bridges What are the 4 levels of Protein structure? Give explanation/examples of each. Correct Answer: 1. Primary - Simply the unique sequence of amino acids making up the single, linear chain of a polypeptide 2. Secondary - The coiling or folding of a polypeptide into repeating configurations (Eg. the alpha helix and the Beta pleated sheet. 3. Tertiary - The "overall" shape of the polypeptide with further linking of R groups and Van der Waal's forces to end up looking like a fu cking bean. 4. Quaternary - A protein structure built from 2 or more polypeptides coming together (Eg. Haemoglobin) What are the seven functions of proteins? Correct Answer: 1. Structure 2. Storage 3. Transport 4. Movemement 5. Communication 6. Enzymatic Action 7. Toxins What role does cholesterol play in the phospholipid bilayer? Correct Answer: - Gives cell membrane strength and stability - Allows protein to be fluid & permeable at low temps - Can become lipid rafts for proteins Name all of the organelles in the lecture Correct Answer: The nucleus Ribosomes Endoplasmic reticulum (Smooth & Rough) Golgi Apparatus Mitochondria [Show More]

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