A level Biology: Post your doubts here!

[confused123]

http://www.xtremepapers.com/papers/...and AS Level/Biology (9700)/9700_s05_qp_1.pdf
mcq no. 8 and 35 in 35 mcq which of the pathogenic bacteria is it referring to, in the humans gut?
Thanks

 

[fatimanaeem]

Im not so sure about the one i drew for part 2 (a)
so just uploading 2 (c)

do we make cell membrane...(bcuz it's nt clear in photomicrograph given) and also are we supposed to make nucleolus?

 

[fatimanaeem]

www.xtremepapers.com/CIE/index.php?dir=International%20A%20And%20AS%20Level/9700%20-%20Biology/&file=9700_w10_qp_31.pdf
Q no. 2a ...Can anyone help me with that...

 

[sagystu]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w09_qp_11.pdf
18, 20, 31, 32, and 40. thanks a lot

32; each cell it passes through it passes through(in and out ) 2 membranes but RBC only 1 membrane ,,so 2 squamous of alveoli 2 sq. of cappillaries and 1 memb of rbc so tatal 5 =D

31; 1 cartillage = present
2 cillia of epithilum
3 iam GEUSSING mucus holding vesicles

20; SORRY I COULDN'T UNDERSTAND IT EITHER

18; a hapliod organism can't produce gametes so no means of sexual reproduction so answer is D

 

[Idolfanatic95]

do we make cell membrane...(bcuz it's nt clear in photomicrograph given) and also are we supposed to make nucleolus?

I think so .That's how i was guided at skool .

 

[Idolfanatic95]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w09_qp_11.pdf
18, 20, 31, 32, and 40. thanks a lot

20) It is possible for any cell in the body to contain mutated DNA. perhaps cancer cells divide rapidly and would have a very short interphase as compared with other normal cells.

 

[xxfarhaxx]

asalamu alaikum....
here r some predicted question fr da AS prctical paper...
1. osmosis on onion cell
2. thy hav provided us wth egg n oil bt no reagents... any gues on wt might cum.???? pls let us knw....
3.cros section of da lungs....

guys if ul knw abt anythn pls let us knw!!!

wasalam!!!!

 

[confused123]

asalamu alaikum....
here r some predicted question fr da AS prctical paper...
1. osmosis on onion cell
2. thy hav provided us wth egg n oil bt no reagents... any gues on wt might cum.???? pls let us knw....
3.cros section of da lungs....

guys if ul knw abt anythn pls let us knw!!!

wasalam!!!!

on what grounds do you make predictions and who exactly made these? plz share.

 

[xxfarhaxx]

on what grounds do you make predictions and who exactly made these? plz share.

guesses made by my teacher according to da apparatus list given by da CIE..
wel v r even given a hand lens...bt hav no idea what tat is for...

 

[xxfarhaxx]

May allah help all of us pass da xam with flying colours...Inshaallah!!!!
SOME USEFUL DUA'S!!

DUAS WHILE PREPARING FOR EXAMS

DUA BEFORE STUDYING
Allahumma infa'nii bimaa O Allah! Make useful for me what You
'allamtanii wa'allimnii taught me and teach me knowledge
maa yanfa' unii. that will be useful to me.Allahumma inii as'aluka O Allah! I ask You for the understanding
fahmal-nabiyyen wa hifthal of the prophets and the memory of the
mursaleen al-muqarrabeen. messengers, and those nearest to You.
Allahumma ijal leesanee O Allah! Make my tongue full of
'amiran bi thikrika wa Your remembrance, and my heart
withqalbi bi khashyatika. consciousness of You.

Innaka 'ala ma-tasha'-u (O Allah!) You do whatever You wish,
qadeer wa anta hasbun-allahu and You are my Availer and
wa na'mal wakeel. Protector and the best of aid.
DUA AFTER STUDYING
Allahhumma inni astaodeeuka O Allah! I entrust You with what I
ma qara'tu wama hafaz-tu. have read and I have studied.
Faradduhu 'allaya inda (O Allah!) Bring it back to me whenhagati elayhi. I am in need of it.
Innaka 'ala ma-tasha'-u (O Allah!) You do whatever You wish,
qadeer wa anta hasbeeya and You are my Availer and
wa na'mal wakeel. Protector and the best of aid.
DUA WHILE STUDYING SOMETHING DIFFICULT
Allahumma la sahla illama O Allah! Nothing is easy except what
ja-'altahu sahla wa anta taj You have made easy. If You wish, You
'alu al hazana etha shi'ta sahla can make the difficult easy.
DUA FOR ANXIETY
Allahumma inni a'oodhoo bika O Allah! I seek refuge in You from anxiety
minal-hammi walhuzni, wal-'ajzi and sorrow, weakness and laziness,
wal-kasali wal-bukhli wal-jubni, miserliness and cowardice, the burden of
wa dal'id-dayni wa ghalabatir-rajaal debts and from being oppressed by men.
DUA FOR DISTRESSAllahumma rahmataka arjoo falaa O Allah! It is Your mercy that I hope for
takilnee ilaa nafsee tarfata so do not leave me in charge of my affairs
'aynin wa aslih-lee sha'nee even for a blink of an eye and rectify
kullahu, laa ilaha illa anta for me all of my affairs. None has the right to be worshiped except You.
DUA FOR CONCENTRATION
"Salla-l-laahu alaa Muhammad wa aal-e Muhammad. Allahumma inni as'aluka yaa mudhakkira-l khayr wa faa'ilahu wa-l-aamimira bihi dhakir-ni maa ansaani-hi-shaytan."
"Blessings of ALLAH be upon Muhammad and his progeny. O Allah I ask you, the one who mentions goodness and actualizes it and commands it, remind me of that which the shaytan makes me forget."

 

[Idolfanatic95]

asalamu alaikum....
here r some predicted question fr da AS prctical paper...
1. osmosis on onion cell
2. thy hav provided us wth egg n oil bt no reagents... any gues on wt might cum.???? pls let us knw....
3.cros section of da lungs....

guys if ul knw abt anythn pls let us knw!!!

wasalam!!!!

This for real?

 

[xxfarhaxx]

This for real?

its jst a guess...it my cum or my nt cum..

 

[xxfarhaxx]

wts a stage micrometer n a graticule,, n hw do u use thm to measure???
plz hlp!!!!!!!!!

 

[confused123]

wts a stage micrometer n a graticule,, n hw do u use thm to measure???
plz hlp!!!!!!!!!

hey should know this and memorize a lot of times because this question is very common!
if u want to know dat how much does one eye piece graticule represents then simply divide the number of e.p.g divisions covering the width of cell in 0.1 mm. this will give you that how much does 1 eye piece division represents. multiply with thousand to get the width in micrometers. then multipy with the number of ep divisions visible to find the field of view.

 

[XPFMember]

B!0l0gy $l!de$ & N0te$... - by workinghard

Biology Practical notes!! - by libra94

Assalamoalaikum wr wb!

Link to Practical Notes added..

 

[sagystu]

http://www.xtremepapers.com/papers/...nd AS Level/Biology (9700)/9700_w09_qp_32.pdf
can't make table of observations in 1 a ii

answer http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w09_ms_32.pdf

please help

 

[confused123]

20) It is possible for any cell in the body to contain mutated DNA. perhaps cancer cells divide rapidly and would have a very short interphase as compared with other normal cells.

dude can you draw plan diagrams for trachea, vein, capillary.. Thanks

 

[Executor]

Ok i dont mean to do spam or anything but please go to the following thread and make dua for all of us :
http://www.xtremepapers.com/community/threads/dua-for-all-candidates.14272/

Dont forget to share and Remember every share makes a difference

 

[Idolfanatic95]

dude can you draw plan diagrams for trachea, vein, capillary.. Thanks

Trachea might look funny but that's all i cud see :O

 

[farhan143]

so today i was practising to focus on microscopic slides
I TOOK THESE PICTURES WITH MY MOBILE PHONE.......
CLEAR ENOUGH TO IDENTIFY AND LABEL!

i found 1 slide written Oct/Nov 2007 J1:

Low power:


High power:




Can any1 tell me what cell this and label the parts for me

thank you!!!