- Messages
- 151
- Reaction score
- 78
- Points
- 38
somebody please check n replyy
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oh , 35th : its D because viruses don't have a cell membrane. viruses don't respire as they live in human cells breed dre. no reason for not having ribosomes in viruses.ok first the answers are 29 C 32 A 34 C 35 D 37 D
so the question said least likely to be passed directly from parent to child sickle cell anaemia is the most likely as it is genetical
Q:1 b
jazakAllah
"It can be passed along by the frequency of action potentials that are formed."
1b(i) When the light source is switched off, the light independant reaction still continues, so RuBP is still converted to GP. GP keeps on producing untill all the RuBP is used up. The level of GP later falls because it's converted to TP in order to make hexose or glucose.
jazakAllah!!!!7b. Role of NADP:
Being a coenzyme, it serves as an electron accepor in electron transport systemr of photophoshphorylation.
During the photolysis of water, the protons (H+) are also carried by NADP in the form of NADPH. These Hydrogen ions are then released by the NADPH, regenerating NADP, and are used to produce a carbohydrate in the Calvin cycle.
Guys why won't you answer?Another question:
Paper:http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s07_qp_31.pdf
Mark Scheme:http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s07_ms_31.pdf
Examiner Report:http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_s07_er.pdf
Look at Q1 part (b)(i)
We have to prepare a space to record or results
The marking scheme says "a mean of the dilutions should be calculated"
Mean? How do we calculate the mean of a dilution?
Guys I even posted the marking scheme and examiner report, if you can't answer this then...
Aoa wr wb!whats the role of this reservoir and the clip below in this experiment......
Ws!aoa wr wb!
yup...but my doubt is, conversion to TP also requires ATP and red. NADP....so how is it that conversion does occur, but nor the regeneration :s
i donot understand this process !?!?!?!?!?!?
the movement of water molecules in terms of water potential gradient
View attachment 6601
ms says this: Six from:Guys why won't you answer?
water is at high potential inside xylem, it will travel via pits to intra cellular spaces in the leaf by apoplast or symplest pathway . and then its travelling down a water potential gradient into guard cells and escaping from stomata. ...i donot understand this process !?!?!?!?!?!?
the movement of water molecules in terms of water potential gradient
View attachment 6601
Read the examiner report too, it says soms says this: Six from:
All data recorded in table;
Concentration of lead nitrate in first column/top row;
Column headings include concentration with percentage and colour;
At least three dilutions;
At least two readings for each solution;
Estimate of degree of blackness/differences in colour described;
Decrease in reaction with increasing lead nitrate/colour yellow/orange etc. to blue/black;
where does it say to calculate mean of the dilutions. :/
sorry no idea. i dnt get itRead the examiner report too, it says so
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