Enzymes and Digestion/Respiration

Amalyase, Protease, and Lipase

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  • Created by: Kavita :)
  • Created on: 09-01-11 15:10

Amalyse Protease Lipase

enzyme                  reaction catalysed

amylase                          starch    >   sugars

protease                         proteins    >    amino acids

lipase                                 lipids    >   fatty acids + glycerol

Production

Amylase: Salivary Glands, Pancrease, Small Intestine

Protease: Stomach, Pancrease, Small Intestine

Lipase: Pancreas, Small Intestine

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Enzymes and Respiration

RESPIRATION is the process of RELEASING ENERGY FROM GLUCOSE, which goes on IN EVERY CELL

Aerobic respiration is respiration using oxygen.

(http://www.hns.org.uk/1/sb/bt/AerobicResp.png)

Energy released is used for:

  • Build large molecules from smaller ones (amino acids > protein)
  • Animals > allow muscles to contract
  • Mammals + birds > keep body temperature steady
  • Plants > build sugars, nitrates and other nutrients into amino acids > protein
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Uses of Enzymes

Enzymes are used in biological detergents and washing powders.

  • They are mainly protein-digesting enzymes (proteases) and fat-digesting enzymes (lipases)

Enzymes are used to change foods.

  • Proteins in baby foods are pre-digested (proteases)
  • Carbohydrate-digesting enzymes (carbohydrases) turn starch syrup into sugar syrup.
  • Glucose syrup into fructose syrup. Fructose is much sweeter, so you can use less of it

 

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Enzymes in Industry

Speed up reactions without the need for high temperatures and pressuers

Advantages

  • Specific, only catalyse the reaction you want them to
  • Lower costs and saves energy
  • Enzymes work for a long time
  • Biodegradable > less environmental pollution

Disadvantages

  • Develop allergies
  • Denatured enzymes by even a small increase in temperature
  • Contamination of the enzyme with substances can affect reaction
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Comments

gemmashannon


good useful infomation

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