We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
Click here to Donate Now (View Announcement)
sorry to say but its a completely wrong answer.
.You have answered the consequences of uncontrolled mitotic division.
sorry to say but its a completely wrong answer.
U have to explain why the cells after mitosis are identical.Its because of semi-conservative replication.And then u describe it.And i was asking for that description.Heres the question.q1 (b)(ii)...
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w07_qp_2.pdf
dude... please be more specificsorry to say but its a completely wrong answer.
U have to explain why the cells after mitosis are identical.Its because of semi-conservative replication.And then u describe it.And i was asking for that description.Heres the question.q1 (b)(ii)...http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w07_qp_2.pdf
Excuse medude... please be more specific
i answered based on your question above, it was asking why cells are genetically identical but in the qp, it is saying how mitosis produce genetically identical cells.
answer will be:
- DNA replication is semi-conservative
- idea of complementary base pairing
- each daughter cell receive exact copy of DNA with same no. and type of parent's chromosomes
! i was specific.Infact i had posted exactly the same question that was given in the paper.U were'nt able to realise it.If i had posted the link to the question then u wud have answered easily by referring to the M.s ..anyways i wasnt impressed by yor answer too.U copied exactly from the m.s.Thank you for the mark scheme
No,both are completely different questions
.One is asking "why genetically identical cells are produced after mitosis" and the other is asking "why exact copy of DNA is produced during replication"In the first one u describe about semi-conservative replication in which each strand of DNA acts as a template and complementary base-pairing occurs producing two double helices that are genetically identical.In the second one u describe about mutation because u know that any change in DNA structure leads to mutation so an exact copy of DNA has to be produced.
no comment..such a retard -_-Excuse me
Retard me? or u?.U blamed me for your stupidity.Anyways i dont want to waste time on such a misunderstanding.no comment..such a retard -_-
i don't want to have diabetes... i've exams to sit for..
well, i don't even look at the markscheme...erghh
i don't blame you for such a stupidity but blame myself for answering such a retard.
.Exams are coming i dont want haters.
ok... whateverRetard me? or u?.U blamed me for your stupidity.Anyways i dont want to waste time on such a misunderstanding.
Im sorry from my side
Best of luck.
And sorry again.
After anaphase,i,e during telophase, the chromosomes uncoil to form chromatin.Each chromatid contains one DNA molecule which will replicate itself during Interphase before the next division.Now, u can describe the DNA replication process in which you'll tell about unwinding of the DNA molecule first and complementary base pairing of each strand.And that the process is semi-conservative.And abt histones they help in packaging DNA.I hope u understood.
For tertiary structure the a helix & the B pleated sheets are coiled & folded to form a 3d structure
q2b(ii)-Look,its very simple.As blood flows across respiring tissues you know that the partial pressure of O2 is low and CO2 is greater because of respiration.So it means that the tissues require O2 which haemoglobin can provide by releasing its oxygen.So,the dissociation curve tells tht as the partial pressure of O2 decreases from 6kP to 2kP, there is a sharp decrease in haemoglobin % saturation with O2, which indicates that O2 was quickly been released.And this is how 02 was delivered.
) So, for each partial pressure of O2,the % saturation of haemoglobin will be lower i.e (towards the right in m.s )
The surface protein is called antigen and when inserted in blood it will cause an immune response which means clonal selection will take place and B-lymphocytes specific to the antigen will start dividing by mitosis into plasma cells and memory cells.When the pathogen will enter the blood,there will be a rapid immune response carried out by memory cells which will quickly divide into plasma cells which will release antibodies.I hope u understand
5.5dm-3 air breathed in 11 breaths (As 11 breaths in 1 minute)
Yep got it thank you!The surface protein is called antigen and when inserted in blood it will cause an immune response which means clonal selection will take place and B-lymphocytes specific to the antigen will start dividing by mitosis into plasma cells and memory cells.When the pathogen will enter the blood,there will be a rapid immune response carried out by memory cells which will quickly divide into plasma cells which will release antibodies.I hope u understand
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now
