1) glucose,surcose同埋starch,哩3樣野有咩分別,佢地既用途,點樣黎`
2)DIFFUSION即系由high concentration 去low concertration,
旦系` 點先叫high,點先叫low?可吾可以舉D例比禾
3)selectively permeable membrane系咩黎架?
4)COTYLEDON有1塊定2塊系點睇架?
5)light & dark reactions同photosynthesis有咩關系?
系吾系light+dark reaction = photosynthesis?
吾洗太複雜咁答..最好就系去到F.4既程度,,
EXAM就泥到na`` 吾該大家幫幫手教下禾 [[-3-`
大家幫幫手``,, -V- BIO [F.4]
2007-12-29 4:02 am
回答 (2)
2007-12-29 4:42 am
✔ 最佳答案
我唔知我答個d係咪你要架喎-0-Q1_glocose係simple sugar.sweet in taste.soluble in water.reducing power
sucose係double sugar.sweet in taste.soluble in water.reducing power
starch係ploysaccharides.not sweet.insoluble in water.
用途.glocose:提供energy for our body
sucose:整麥牙糖
starch:唔知喎-口-
點黎都唔知-口-
Q2_diffusion我唔知點話你知點叫high點叫low-0-
舉例就...有人放屁.係佢放屁個位d味就勁d,遠離個個位d味就無咁勁
d粒子向四散.最後粒子平均分佈番.d味散左.咪diffusion
Q3_選擇性滲透,只可以有部分既粒子由一個地方過去另外一個地方
example-有個杯入面有water+sucose,係個杯到放個dialysis tubing.tubing入面有
較少量既sucose.water粒子較細.經過滲透作用入到去dialysis tubing.由於sucose粒子大粒
所以入唔到去dialysis tubing啦
Q4_要係種子到睇架-.-我本書有圖...不過放唔到上黎-0-
Q5_係啊...
唔明可以再問我既-0-你睇唔明既話對唔住.我表達得唔好-0-
我都係盡量架炸-0-
2007-12-28 20:46:44 補充：
其實我d答案係咪好廢-0-?starch用途...main form of carbohydrate storage in plant-0-
參考: 我f.4-口-係本書到搵架
2007-12-30 6:10 am
1) Glucose is a type of simple sugar which can be polymerized to sucrose, a type of polyscarrides. Starch can be formed by polymerization of sucrose or glucose. E.g., In photosynthesis, glucose is formed in dark reaction and then is polymerized into starch for storage. Howvever, if it becomes favourable to transport, it will be reformed to sucrose.
2) Diffusion is a random movement of molecules from a highER concentration to lowER concentration area. (Comparasion is very important when defining the term.)
E.g. From distilled water (higher conc.) to 2M sucrose solution (lower conc.)
From 2M sucrose solution (higher conc.) to 4M sucrose solution (lower conc.)
3) Selective permeable membrane is a type of membrane which can control the substances moving in or out of the membrane, e.g. cell membrane and dislysis tubing
4) Cotyledon does not mean the 'leaf'. In Chinese, it is called 子葉 but actually it is an organ of the seed which stores the nutrients and water before germination.
5) Photosynthesis includes both light and dark reaction. THe product from the light reaction can be used in the dark reaction to generate glucose.
I hope i can help you at all.
2) Diffusion is a random movement of molecules from a highER concentration to lowER concentration area. (Comparasion is very important when defining the term.)
E.g. From distilled water (higher conc.) to 2M sucrose solution (lower conc.)
From 2M sucrose solution (higher conc.) to 4M sucrose solution (lower conc.)
3) Selective permeable membrane is a type of membrane which can control the substances moving in or out of the membrane, e.g. cell membrane and dislysis tubing
4) Cotyledon does not mean the 'leaf'. In Chinese, it is called 子葉 but actually it is an organ of the seed which stores the nutrients and water before germination.
5) Photosynthesis includes both light and dark reaction. THe product from the light reaction can be used in the dark reaction to generate glucose.
I hope i can help you at all.
參考: bio knowledge
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https://hk.answers.yahoo.com/question/index?qid=20071228000051KK04232