3boys2girls » 化學物理生物 » [email protected] box shows a nutrient and the chemical test used for it.

2009-5-12 23:08 為何要落淚t3t
[email protected] box shows a nutrient and the chemical test used for it.

[size=3]This box shows a nutrient and the chemical test used for it.
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[img=706,1150]http://i524.photobucket.com/albums/cc324/orzxdxp/006-3.jpg[/img]




(a) The food we eat contains nutrients.


The nutrient and the chemical test are correctly matched in only three of the boxes.
Write down the letters of these three boxes.

[b][u](呢part我自己就寫左A,B and E.  不過好有可能錯!錯左話我知ya-v-)[/u][/b]



(b) Describe how you would do the chemical test using Benedict's solution.[/size]
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[size=3](c) The material that jeans are made from contains starch. [/size]


[size=3]     A student spilled some amylase solution on her jeans.[/size]


[size=3](i) What type of substance is amylase?[/size]

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[size=3](ii) If the amylase solution was not washed off her jeans it would digest the starch. What would the digested starch be tured into?[/size]
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[size=1]ps:聽牙sir講好似係近年其中一條CE題-口-[/size]

2009-5-13 00:11 magiyafeimo
(a) The food we eat contains nutrients.


The nutrient and the chemical test are correctly matched in only three of the boxes.
Write down the letters of these three boxes.

D E F

(b) Describe how you would do the chemical test using Benedict's solution.
dissolve the food sample in water in a test tube and put a small amount of Benedict's reagent. heat up the test tube in water bath, which is usually 4-10 minutes, if the solution in the color of blue then no reducing sugar present, if it becomes brick red or brown then there are reducing sugar present.

(c) The material that jeans are made from contains starch.


     A student spilled some amylase solution on her jeans.


(i) What type of substance is amylase?

it is an enzyme

(ii) If the amylase solution was not washed off her jeans it would digest the starch. What would the digested starch be tured into?


the starch would turn to sugar


ps:聽牙sir講好似係近年其中一條CE題-口-

[[i] 本帖最後由 magiyafeimo 於 2009-5-13 00:12 編輯 [/i]]

2009-5-13 12:37 憫晴
版主有咩係唔識架??? 家政??w:075:

2009-5-13 15:57 為何要落淚t3t
[quote]原帖由 [i]憫晴[/i] 於 2009-5-13 12:37 發表 [url=http://www2.3boys2girls.com/redirect.php?goto=findpost&pid=39521973&ptid=660445][img]http://www2.3boys2girls.com/images/common/back.gif[/img][/url]
版主有咩係唔識架??? 家政??w:075: [/quote]

係囉佢超勁!!!


話唔定家政都好勁xd

2009-5-13 16:36 magiyafeimo
呵呵
本韃就係盡力去搵既

不過本韃有d始終唔會太識
例如
經濟、
會計、
電腦

始終未讀過
或者讀讀下drop左
不過本韃都會定時upgrade自己

話時話
本韃唔知家政算係咩啦
不過本韃都識煮幾味既

2009-5-14 00:35 憫晴
[quote]原帖由 [i]magiyafeimo[/i] 於 2009-5-13 16:36 發表 [url=http://www01.3boys2girls.com/redirect.php?goto=findpost&pid=39528227&ptid=660445][img]http://www01.3boys2girls.com/images/common/back.gif[/img][/url]
呵呵
本韃就係盡力去搵既

不過本韃有d始終唔會太識
例如
經濟、
會計、
電腦

始終未讀過
或者讀讀下drop左
不過本韃都會定時upgrade自己

話時話
本韃唔知家政算係咩啦
不過本韃都識煮幾味既 [/quote]

排隊試食w:207:

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