生物有關酶既問題

先講講蛋自質 **唔講太詳細...因為太多information
Proteins are large organic compounds made of amino acids. Many amino acids join together by condensation, forming polypepeide. 一個或以上的polypeptides組成protein.
咁protein主要contain carbon, hydrogen, oxygen, nitrogen.
function: many many. e.g.
for growth and repair...因為佢make up the protoplasm of cells.
製造antibodies保護我地
insulin又會降低血糖

---大部分protein都係enzyme

enzyme catalyze chemical reactions.
催化
--亦即令到reaction進行得快d...
六都可以breakdown substance
例如: protease breakdown protein, lipase breakdown lipid

enzymes can be are released from the cell by excotysis
所以你所問的"酶在cell 裏面，咁點發揮作用??"
酶是會離開cell, 所以係cell外的 reaction都可以受到enzyme的影響

至於你話點解會break 自己
我作個例子
lyzosome 係一種organelle contain digestive enzyme.
咁點解enzyme 唔會breakdown lysosome...
咁係因為lysosome的membrane 保護
咁呢種enzyme釋放之後就digest返佢要digest的野

亦可以咁講
有種lipase...佢又係比野包住...咁包住佢的東西都冇lipid...又點會被digest呢

酶在cell入面做左..之後係會export出去的~
又例如口水入面既酶

上面位人兄說對... 分解代謝不定在cell內進行
catabolism分解代謝 function：
Large polymeric molecules (polysaccharides, fatty acids, nucleic acids and proteins) are processed into their constituent monomeric units (i.e. monosaccharides, carbon units, nucleotides and amino acids, respectively).
所以唔係break cell

** in fact break cell由lysosome黎做...by a process called autolysis...
就好似蝌蚪的尾就係因為autolysis的作用

同上面人兄一樣...
分解代謝大過組成代謝，人就會變小，原因係 gain

酶在cell入面做左..之後係會export出去的~
又例如口水入面既酶

蛋白質係由胺基酸做成的有機物質..對生物是必需的..例如做酶,結構,訊息傳遞等等

酶係蛋白質..但佢地係極度專一性的(high specificity)..一種酶只會加快某一種反應/消化某一種野

分解代謝冇限定在cell入/出面的..它包括了所有在生物體內的分解反應

"分解代謝大過組成代謝，人就會變小"..因為分解=破壞,組成=建造
你諗下好似一個城市咁..如果拆既多過起既..咁實會細左..