1.Which of the following has the least direct effect on the rate of enzymatic reaction?
A. pH B. temperature C. enzyme concentration
D. carbon dioxide concentration
2.Which of the following about active transport is correct?
(1) Substances move from a region of lower concentration to a region of higher concentration.
(2) Energy is needed.
(3) A differentially permeable membrane is needed.
3. Osmosis can take place
(1) in living tissues.
(2) in non-living tissues.
(3) only in the presence of a differentially permeable membrane.
4.Which of the following pair is correct?
Animal's organ
Plant's organ
A.
lung
stem
B.
heart
xylem
C.
blood
epidermis
D.
head
leaf
Biology挑戰題
2008-03-29 8:38 pm
回答 (2)
2008-03-29 8:51 pm
1. D (Carbon Dioxide Concentration)
Provided that your enzyme doesn`t involve reactions with carbon dioxide.
2. All of the above.
3. All of the above.
4. B (heart:xylem)
Heart pumps blood actively around the body of an animal. Xylem, through transpiration pull, moves fluid along the tubes in the plant.
That`s what I can reason from the answers given - the rest don`t really make sense either. Anyone please correct me if you see something different.
Provided that your enzyme doesn`t involve reactions with carbon dioxide.
2. All of the above.
3. All of the above.
4. B (heart:xylem)
Heart pumps blood actively around the body of an animal. Xylem, through transpiration pull, moves fluid along the tubes in the plant.
That`s what I can reason from the answers given - the rest don`t really make sense either. Anyone please correct me if you see something different.
2008-03-29 8:51 pm
1.Which of the following has the least direct effect on the rate of enzymatic reaction?
D. carbon dioxide concentration
A. 唔係,,因為PH VALUE會影響個ACTIVE RATE
B. 唔係..因為太冷會到佢唔active,,過熱就denature
C.冇b.a咁有影響,,因為enzyme 係reusable,,加多d快d掛<<我都唔太肯定- -
所以d..因為我未聽過
2.atp is needed for active transport
so ans is 3
3.(1)
4..係唔係有圖既- -
我估,,d- -
再問- -
係唔係ce level- -
D. carbon dioxide concentration
A. 唔係,,因為PH VALUE會影響個ACTIVE RATE
B. 唔係..因為太冷會到佢唔active,,過熱就denature
C.冇b.a咁有影響,,因為enzyme 係reusable,,加多d快d掛<<我都唔太肯定- -
所以d..因為我未聽過
2.atp is needed for active transport
so ans is 3
3.(1)
4..係唔係有圖既- -
我估,,d- -
再問- -
係唔係ce level- -
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