2017 DSE Bio 討論區(2)
馬料水之友 2017-4-24 13:53:30
我都幾肯定e2今年會拉好重

唔一定 睇埋整體表現

我覺得今年考生應該無乜人會高過16分

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30cm巨炮 2017-4-24 13:53:44 此回覆已被刪除
2017-4-24 13:53:50

比較難中
可能你岩都未定

Should be constant rate of respiration
And photo rate > respiration rate

:^(

可能係

The assumption is all amount of oxygen released is equal to amount of oxygen from photosynthesis no oxygen will be consumed for respiration

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration
2017-4-24 13:55:10 因為chem就知
CO2(g) <> CO2(aq)

Co2 唔會變limiting
香城獨立 2017-4-24 13:55:50

比較難中
可能你岩都未定

Should be constant rate of respiration
And photo rate > respiration rate

:^(

可能係

The assumption is all amount of oxygen released is equal to amount of oxygen from photosynthesis no oxygen will be consumed for respiration

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(
2017-4-24 13:57:17

:^(

可能係

The assumption is all amount of oxygen released is equal to amount of oxygen from photosynthesis no oxygen will be consumed for respiration

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

咁即係要改bicarbonate?
:^(
30cm巨炮 2017-4-24 13:57:31 此回覆已被刪除
香城獨立 2017-4-24 13:57:51
因為chem就知
CO2(g) <> CO2(aq)

Co2 唔會變limiting

consumption rate 可以大過 dissolve rate. 的確唔少書入面呢個實驗都有類似set up.
深秋夜眠望上天 2017-4-24 13:58:13

比較難中
可能你岩都未定

Should be constant rate of respiration
And photo rate > respiration rate

:^(

可能係

The assumption is all amount of oxygen released is equal to amount of oxygen from photosynthesis no oxygen will be consumed for respiration

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

light intensity應該係唯一independent
馬料水之友 2017-4-24 13:59:09

The assumption is all amount of oxygen released is equal to amount of oxygen from photosynthesis no oxygen will be consumed for respiration

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

咁即係要改bicarbonate?
:^(

Standard sodium hydrogencarbonate solution with constant carbon dioxide concentration so there will be steady and consistent carbon dioxide supply to plant so the photosynthetic rate changes is due to changing light intenisty only not carbon dioxide
香城獨立 2017-4-24 13:59:43

The assumption is all amount of oxygen released is equal to amount of oxygen from photosynthesis no oxygen will be consumed for respiration

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

咁即係要改bicarbonate?
:^(

Standard sodium hydrogencarbonate solution with constant carbon dioxide concentration so there will be steady and consistent carbon dioxide supply to plant so the photosynthetic rate changes is due to changing light intenisty only not carbon dioxide

:^(
:^(

Ads

2017-4-24 13:59:44 我諗有diffused light
所以唔係one variable ja
:^(
2017-4-24 14:00:29

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

咁即係要改bicarbonate?
:^(

Standard sodium hydrogencarbonate solution with constant carbon dioxide concentration so there will be steady and consistent carbon dioxide supply to plant so the photosynthetic rate changes is due to changing light intenisty only not carbon dioxide

但點睇有diffused light 呢個variable?
馬料水之友 2017-4-24 14:02:59 I said photophosphorylation produces ATP for regeneration of 4-C carbon dioxide acceptor and conversion of 3-C compound into triose phosphate in carbon fixation

Photolysis of water produces NADPH which acts as a reducing agent to donate hydrogen to triose phosphate so triose phosphate is reduced

覺得我會扣兩分定一分
馬料水之友 2017-4-24 14:04:42

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

咁即係要改bicarbonate?
:^(

Standard sodium hydrogencarbonate solution with constant carbon dioxide concentration so there will be steady and consistent carbon dioxide supply to plant so the photosynthetic rate changes is due to changing light intenisty only not carbon dioxide

但點睇有diffused light 呢個variable?

其sum of protons from lamp and surrounding is proportional to photosynthetic rate
As light intensity from surrounding should be constant
馬料水之友 2017-4-24 14:04:56

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

咁即係要改bicarbonate?
:^(

Standard sodium hydrogencarbonate solution with constant carbon dioxide concentration so there will be steady and consistent carbon dioxide supply to plant so the photosynthetic rate changes is due to changing light intenisty only not carbon dioxide

但點睇有diffused light 呢個variable?

其sum of protons from lamp and surrounding is proportional to photosynthetic rate
As light intensity from surrounding should be constant
30cm巨炮 2017-4-24 14:05:05 此回覆已被刪除
馬料水之友 2017-4-24 14:05:11

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

咁即係要改bicarbonate?
:^(

Standard sodium hydrogencarbonate solution with constant carbon dioxide concentration so there will be steady and consistent carbon dioxide supply to plant so the photosynthetic rate changes is due to changing light intenisty only not carbon dioxide

但點睇有diffused light 呢個variable?

其sum of photons from lamp and surrounding is proportional to photosynthetic rate
As light intensity from surrounding should be constant
Thyroxine 2017-4-24 14:05:36

比較難中
可能你岩都未定

Should be constant rate of respiration
And photo rate > respiration rate

:^(

可能係

The assumption is all amount of oxygen released is equal to amount of oxygen from photosynthesis no oxygen will be consumed for respiration

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

:^(
馬料水之友 2017-4-24 14:06:20
I said photophosphorylation produces ATP for regeneration of 4-C carbon dioxide acceptor and conversion of 3-C compound into triose phosphate in carbon fixation

Photolysis of water produces NADPH which acts as a reducing agent to donate hydrogen to triose phosphate so triose phosphate is reduced

覺得我會扣兩分定一分

應該寫到nadph atp點produce有兩分
點用有2分
:^(

仆街啦 佢會tick conversion of 3 C compound to triose phosphate 而唔睇前面regeneration
巴麻美學姐 2017-4-24 14:06:34

咁點樣modify

因為light independent
-> only light source
-> 我寫左cover the whole set up with black curtain
-> to prevent interfering source of Light

Replace water with standard bicarbonate solution
So the photosynthetic rate will not be affected by decrease of carbon dioxide concentration in water

但佢而家唔係要test CO2 bor
The independent variable is light , not co2 concentration

佢將個 CO2 conc keep constant, 咁唯一independent variable 就係light
:^(

咁即係要改bicarbonate?
:^(

Standard sodium hydrogencarbonate solution with constant carbon dioxide concentration so there will be steady and consistent carbon dioxide supply to plant so the photosynthetic rate changes is due to changing light intenisty only not carbon dioxide

但點睇有diffused light 呢個variable?

我覺得考評局主要想人答diffused light掛
NaHCO3 solution通常教科書都好少講咁深
:^(

Ads

30cm巨炮 2017-4-24 14:07:46 此回覆已被刪除
馬料水之友 2017-4-24 14:08:47
I said photophosphorylation produces ATP for regeneration of 4-C carbon dioxide acceptor and conversion of 3-C compound into triose phosphate in carbon fixation

Photolysis of water produces NADPH which acts as a reducing agent to donate hydrogen to triose phosphate so triose phosphate is reduced

覺得我會扣兩分定一分

應該寫到nadph atp點produce有兩分
點用有2分
:^(

仆街啦 佢會tick conversion of 3 C compound to triose phosphate 而唔睇前面regeneration

應該係用黎reduce 3c to tp
同埋regeneration to 5c co2 acceptor

兩分無左? but ATP has two uses wor will they tick for either one
Thyroxine 2017-4-24 14:09:13 垃圾補習佬唔夠膽出MC ans
:^(
馬料水之友 2017-4-24 14:09:22
I said photophosphorylation produces ATP for regeneration of 4-C carbon dioxide acceptor and conversion of 3-C compound into triose phosphate in carbon fixation

Photolysis of water produces NADPH which acts as a reducing agent to donate hydrogen to triose phosphate so triose phosphate is reduced

覺得我會扣兩分定一分

應該寫到nadph atp點produce有兩分
點用有2分
:^(

仆街啦 佢會tick conversion of 3 C compound to triose phosphate 而唔睇前面regeneration

應該係用黎reduce 3c to tp
同埋regeneration to 5c co2 acceptor

早知唔好手多寫4-C