biol+3+exam+revision

OK biol clan this is where you revise. Any queries that relate directly to questions you come across in the trial exams are to be posted below. Please indicate which exam, year and question number you are referring to. It will make things a lot easier for me. You can also ask general questions about the exam as well. I suggest you also check out what was posted under biol 3 exam revision from last year's class. Comparison of the key knowledge between old and current course. Click here.

Q. I am currently doing the 2006 trial exam and question 9 in the multiple choice asks for X in the diagram.. but if you look in the diagram there is no X am i missing something? //A. No you are not it is a mistake. If you have a close look there are two "K" letters. One of them I assume should be "X". Anyway even if you do not know which part of the cell it is referring to you should be able to work out the correct response through logic and knowledge of terminology and the fact that it is an animal cell. B'seder! VM //

Q. I can't seem to find a good definition of //rational drug design//. I have come across a few exams which have asked us to state what it is, and i struggle to give a full proof answer. What are the key elements to include in a sentence about drug design/ what would you say rational drug design is? //A. You should have a look at the VCAA assessors reports for 06, 07 and 08 for what they think. Your answer may depend on the context of the question but the key thing is to say that "involves creating/producing a molecule that has the right shape/structure to allow it to bind to the active site of a target molecule thereby affecting the functioning of that molecule for the benefit of the individual. VM //

Q. Is regards to endergonic and exergonic reactions: Is it referring to the amount of mass found at the final product (of each reaction)? OR is it referring to the energy LOST/GAINED in each reaction (not in regards to the final product- but in regards to the actual reaction). I am aware that didn't make much sense (I'm shotgunning you periods 3 and 4 tomorrow if you're still free) //A. Endergonic and exergonic relate to energy changes in a chemical reaction, not the mass of the final product. So your second statement is right. VM //

Q. Voj or biol clan, could you please explain to me the biomolecular importance of ribose? spanks. // A. Well, let me see. I assume you would agree that ATP and Nucleic acids are important to cells. Deoxyribonucleic and ribonucleic acid both contain a ribose sugar as part of the nucleotide structure (although in DNA it its deoxyribose). Pretty important don't you think? Now lets look at ATP. If you are unaware ATP is really another type of nucleotide. It contains adenosine and three phosphates. But the adenosine is really adenine (nitrogen base) joined with a ribose sugar. Sound familiar. Nitrogen base, ribose sugar and phosphate group(s). So in short ribose is part of the structure of ATP (the useable form of energy for all cells and therefore life) and DNA/RNA (information molecules that ultimately control cell functioning). VM //

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