Enzymes? For the AQA B2 paper which enzymes do I need to know? What do they do? Where are they made? And where are they stored?

  • 1 vote

Biology exam tomorrow...

Enzymes? For the AQA B2 paper which enzymes do I need to know? What do they do? Where are they made? And where are they stored?

Posted Wed 18th May, 2011 @ 22:24 by caroll

4 Answers

  • 2 votes

You need to know about amylase, lipase and protease.

Amylase breaks down starch into sugars (glucose). Amylase is made in the salivary glands, the pancreas and the small intestine.

Lipase breaks down fats into fatty acids and glycerol. Lipase is made in the pancreas and the small intestine.

Protease breaks down proteins into amino acids. Protease is made in the pancreas and the small intestine.

As far as I can tell enzymes are constantly in use so they aren't necessarily "stored" anywhere.

Hope I've been helpful!

Answered Thu 19th May, 2011 @ 09:36 by M
  • 1 vote

Hi, just to add to the first answer. Enzymes are generally stored in these vessels called lysosomes. I'm not sure how much you would need to know about these. The enzymes will be synthesised in the rough endoplasmic reticum of the cells of the organs. These are then put into vessel called lysosomes and digestive enzymes will exit the cells via exocytosis. These will then serve to digest the food molecules (break down).

Answered Sun 22nd May, 2011 @ 16:04 by Alex
  • 1 vote

just to add:

amylase breaks down starch to maltose and maltase breaks down maltose to glucose

Answered Sun 22nd May, 2011 @ 18:14 by Pui Pui
  • 1 vote

All of them are right because I did the AQA Biology Unit 2 exam last week.

However, if you are doing the exact same exam as I did, then they will not come up.

The main questions that came up on mine was about the hypothalamus in homeostasis, biomass and some other things that i cant remember :P

meiosis and mitosis did not come up but remember, the paper you are doing may not be the same one as what i did so revise for as much as you can over B2a & B2b :)

Answered Tue 24th May, 2011 @ 22:08 by Aidan Waples