Elements of Life

of 4
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Related Documents
  ELEMENTS OF LIFE 92% elements occurring naturally in plants16 are essential elements*Hydrogen*Carbon 94% of the mass of most plant tissues*Oxygen*itrogen Organic compounds  ! molecules that contain carbon Inorganic chemicals  ! non carbon compounds Biochemicals  ! are organic and inorganic molecules that occur in li ing organism Four Major Classes of Large Molecules (Constituting the Massof a lant! 1# Car oh#drates  ! a substance composed of carbon$ hydrogen$ oxygena#onosaccharide & glucose $ galactose$ mannose $ fructose b#'isaccharide ! sucrose(glucose ) fructose$ maltose use in maple syrup to ma+e beer c#,olysaccharide*Cellulose ! structural polysaccharide&holds cells together *,ectin - Hemicellulose ! gluey polysaccharide that holds cellulose fibrils together   *.ums ! are complex$ branched polysaccharideconsisting of se eral +inds of monomers ex# .um arabic/ses of .um 0rabic1#use to stabilie postage stamp glue2#hand lotion#li3uid soaps*0gar - carrageenan ! commercially important  polysaccharide from red algae a slimy substance that surrounds the cellulose in cell 5alls of certain red algae*0mylose - amylopectin! storage polysaccharide5rin+led pea rice - corn*tarch ! storage polysaccharide in plants2# roteins  ! important in cell structure and as storage reser es &are also enymes that catalye biochemical reactions*torage proteins ! are stored mostly in seeds and are used as a source of nutrition for the earlyde elopment of seedlingsex# Corn ! 5ith storage protein called $ein% 7xtensin!structural protein in cell 5alls - membranes  & thought to play a role in the expansion of cell 5all  *7nymes ! are the catalyst for biochemical reactions&speed up reaction 5ithout being consumed in the process# Nucleic acid  ! #180 (ribonucleic acid ! 5ith sugar ribose#2'0(deoxyribonucleic acid ! 5ith deoxyribose sugar 4# Lipids  ! for energy storage&5ith 5ater repellant property Common Lipids in lants' *oils ! are fats that are li3uid at room temperature &combination of a molecule glycerol 5ith  long long chain organic acid$ called fatt# acids  fat ! is a triacylgyceride abundant in seedsex# Cotton$ sunflo5er$ coconut$ sesame$ oli e peanut$ corn$ castor bean$ soy bean*phospholipids*5axes ! ex# Cuticle of lea es$ fruits$ herbaceous stemare called epicuticular a)  Cutin - suberin & in the cor+ cells in bar+  Compounds in Lesser *mounts(ma+e # plants! 1#,henolics2#0l+aloids#terols4#la onoids  ã ,olymers ! are made of many identical or similar monomers assembled into large moleculesex# Cellulose$ starch$ enymes$ '0$ 5axes$lignin - tannin ã .lucose is the only monomers in cellulose - starch ã 7nymes and proteins consist of t5enty different amino acid monomers: there are probably more than ;<$<<< uni3ue  polymers made from amino acids in e ery plant ã Only four nucleotides ma+e a polymer of '0$ but e ery organism has a different set of '0 molecules
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks