Thursday, 3 January 2013

2.6 describe the structure of carbohydrates, proteins and lipids


as large molecules made up from smaller basic units

Carbohydrates
Simple sugars- monosaccharides-such as glucose are the basic carbohydrates
They join together to make more complex disaccharides and polysaccharides: 


Proteins
are made up of amino acids
amino acids differ depending on what the 'r' (rest) is:
Lipids, Carbohydrates, and Proteins

Lipids
are made from combining glycerol and three fatty acids:
Lipids, Carbohydrates, and Proteins

The following video is quite good to watch, but it has a lot of extra content: http://www.youtube.com/watch?v=H8WJ2KENlK0
Posted by at
Labels: , ,

29 comments:

  1. Anonymous25 July 2013 at 05:45

    how is starch, protein and lipids used in the body?

    ReplyDelete
    Replies
    1. HannahHelp26 July 2013 at 04:43

      Carbohydrates are stored as starch in plants, but in humans it is glucose: glucose is used in respiration to create energy. Proteins are broken down into amino acids in the digestive system: these amino acids are then used to create new proteins which make up cells (growth and repair.) Lipids become fat stores in the body, these offer protection and insulation to our bodies; lipids can also be used to create energy.

      Delete
    2. yaksol4 November 2013 at 13:11

      what grade did you get in the end?

      Delete
    3. HannahHelp21 November 2013 at 14:26

      A* :)

      Delete
    4. Unknown14 June 2014 at 07:25

      Humans store carbohydrates as glycerol so that when it is needed it can be turned into glucose faster than breaking down starch would allow. Second you cannot create energy, therefore lipids are broken down and energy is released from them.

      Delete
    5. Unknown11 May 2015 at 12:54

      Human's store carbohydrates as glycogen*

      Delete
    6. HannahHelp17 June 2015 at 16:18

      Oh yeah thanks your right where I said humans store carbohydrates as glucose I should have said as glycogen

      Delete
  2. Anonymous27 January 2014 at 07:59

    did u get a stars in all sciences?

    ReplyDelete
  3. Test1 March 2014 at 21:52

    This comment has been removed by the author.

    ReplyDelete
  4. Unknown14 April 2014 at 06:01

    love this website :) but starch is not a monosaccharide

    ReplyDelete
    Replies
    1. HannahHelp24 May 2014 at 08:05

      Thanks :) and cheers!

      Delete
    2. Rahat Baksh4 May 2016 at 01:42

      hey haanah A how can i gest marks like you...how did you practiced??

      Delete
  5. Unknown12 May 2014 at 05:41

    I hope, I get as good as you got for the sciences, Hannah A. Thanks a billion for this.

    ReplyDelete
    Replies
    1. HannahHelp24 May 2014 at 08:04

      I hope you do too! No problem, good luck :)

      Delete
  6. Unknown14 June 2014 at 07:15

    where you have said "amino acids differ depending on what the "r" (rest) is" what does this mean?

    ReplyDelete
    Replies
    1. HannahHelp28 November 2014 at 05:25

      Basically there are other molecules in the amino acid which you don't need to know about for GCSE and you just called it the R-group. In each R-group there are different molecules which change the amino acid- hope that answers your question :)

      Delete
  7. Anonymous18 July 2016 at 05:42

    hi Hannah A! could you please give me some tips on how u revised!!! thanks

    ReplyDelete
  8. Saiyara26 March 2017 at 03:02

    This comment has been removed by the author.

    ReplyDelete
  9. MCG8 May 2017 at 11:26

    Hi! first of all, thank you, this is helping me a lot, secondly, where did you get the images from? They aren't loading, thanks

    ReplyDelete
  10. MCG8 May 2017 at 11:27

    Hi! first of all, thank you, this is helping me a lot, secondly, where did you get the images from? They aren't loading, thanks

    ReplyDelete
  11. Unknown10 May 2017 at 23:17

    This comment has been removed by the author.

    ReplyDelete
  12. Unknown10 May 2017 at 23:18

    what grade did u get for other subjects such as languages and are u asian?

    ReplyDelete
  13. Unknown16 May 2017 at 23:30

    the photos aren't loading

    ReplyDelete
  14. Mike Tsang26 June 2017 at 02:35

    The Biology Syllabus has changed.... New Syllabus Blog:

    http://igcse-biology-2017.blogspot.hk

    ReplyDelete
  15. SophieRice26 June 2017 at 07:26

    Look more at

    http://igcse-biology-notes.blogspot.hk/2017/06/26-describe-structure-of-carbohydrates.html

    ReplyDelete

Subscribe to: Post Comments (Atom)