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measure the size of the nucleas with a scale.Convert into micrometer. magnification is already given. Use the formula Magnification=Size of the image/Size of the specimen
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measure the size of the nucleas with a scale.Convert into micrometer. magnification is already given. Use the formula Magnification=Size of the image/Size of the specimen
Oh so you mean the lines X and Y drawn on the graph and so it has nothing to do with the curve !oh ok thanks a lot for the helpNahh you misunderstood me. See as he inhales more, the line x gets shorter, and as he exhales more, the line y also gets shorter.
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It's B , because in my book it's written there's a drug called zidovudine which is similar to the nucleotide containing the base thymine, zidovudine binds to the viral enzyme reverse transcriptase and blocks it's action , stopping the replication of the viral genetic material and leading to an increase in some of the body's lymphocytes , that's what's in my book . hope you doubt is clearedwhich disease is treated with drugs that have a similar molecular structure to DNA molecule?
A cholera
B HIV AIDS
C malaria
D tuberculosis
the ans is A bcoz DNA controls the making of protien and amylase is an enzyme which is a protien..alsalum allaykom
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w11_qp_11.pdf
Q 22 , can some explain please?
Q2 Mrna leaves the nucleus after being made to reach the ribosomes for DNA translation in protein synthesis and the nucleolus in the nucleus makes ribosomes which leave to stay in the cytoplasm so 2 and 3 are correct and DNA is always in the nucleus.15 it cannot be active transport because it's against a concentration gradient and the graph shows that and increase in glucose increases rate of entry so it's wrong , it cannot be simple diffusion because the graph will not become a straight line but will be a line thats always increasing because the concentration of glucose outside would be increasing so there will always be a concentration gradient so it's definitely only facilitated diffusion which is limited by the number of channel proteins present in the cell membrane so only 1 is correct. q26 B is incorrect because the opposite happens that's very obvious C is wrong because the percentage of oxygen is the same every where it's like a constant like how the percentage composition of CO2 is 0.03% and nitrogen 78% so it doesn't changed and D is absolutely wrong same explanation like C , this leaves us with A WHICH IS COrrect becoz when the partail pressure of O2(NOT percentage) decreases , less oxygen is carried by the red blood cells and hemoglobin is less saturated becoz less 02 is available so it's A. IT's C right? measles is the only disease gievn that is transmitted by direct contact so by a person just touching another person , cholera is through food and water , malaria through mosquito, and sickle cell anemia is through genes so it's C , as when the other ppl that contact the infected person are found the disease will be treated faster.35 is C beacuse during the primary response of the virus , memory cells where made and stored , so during the secondary response they identify the virus and divide to many plasma cells which secrete antibodies in larger amounts than in the primary response and more memory cells in case the virus in encountered another time.can anyone help with q.2, 5, 15, 26, 34 & 35
OOps my bad I meant 2010 here's the link:the ans is A bcoz DNA controls the making of protien and amylase is an enzyme which is a protien..
through the trend u can see A & D have almost same %. And B & C have almost same %. So now C cannot b adenine since its niland it is thymine. Now when C is thymine the matching % is B.So the ans is B...OOps my bad I meant 2010 here's the link:
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w10_qp_11.pdf
thaaaaank u soo much....i think u forgot to explain q.5Q2 Mrna leaves the nucleus after being made to reach the ribosomes for DNA translation in protein synthesis and the nucleolus in the nucleus makes ribosomes which leave to stay in the cytoplasm so 2 and 3 are correct and DNA is always in the nucleus.15 it cannot be active transport because it's against a concentration gradient and the graph shows that and increase in glucose increases rate of entry so it's wrong , it cannot be simple diffusion because the graph will not become a straight line but will be a line thats always increasing because the concentration of glucose outside would be increasing so there will always be a concentration gradient so it's definitely only facilitated diffusion which is limited by the number of channel proteins present in the cell membrane so only 1 is correct. q26 B is incorrect because the opposite happens that's very obvious C is wrong because the percentage of oxygen is the same every where it's like a constant like how the percentage composition of CO2 is 0.03% and nitrogen 78% so it doesn't changed and D is absolutely wrong same explanation like C , this leaves us with A WHICH IS COrrect becoz when the partail pressure of O2(NOT percentage) decreases , less oxygen is carried by the red blood cells and hemoglobin is less saturated becoz less 02 is available so it's A. IT's C right? measles is the only disease gievn that is transmitted by direct contact so by a person just touching another person , cholera is through food and water , malaria through mosquito, and sickle cell anemia is through genes so it's C , as when the other ppl that contact the infected person are found the disease will be treated faster.35 is C beacuse during the primary response of the virus , memory cells where made and stored , so during the secondary response they identify the virus and divide to many plasma cells which secrete antibodies in larger amounts than in the primary response and more memory cells in case the virus in encountered another time.
Thanks a lot finally I got it hehethe ans is A bcoz DNA controls the making of protien and amylase is an enzyme which is a protien..
oh yes I forgot. Okay so we know that in a plan diagram it shows the distribution of TISSUES , so in B a layer of palisade cells is a tissue so it is included , a vascular bundle is also a tissue, again included, now in D xylem vessel elements are actually dead CELLS , and in a plan diagram no individual cells should be included which makes it the right answer , if they would have said only the xylem vessel then it would have to be included in the plan diagram because it's a tissue. Apparently the cuticle is always drawn in a plan diagram , it's a tissue , it's made by the epidermis , but I don't really know why it's present:/thaaaaank u soo much....i think u forgot to explain q.5
through the trend u can see A & D have almost same %. And B & C have almost same %. So now C cannot b adenine since its niland it is thymine. Now when C is thymine the matching % is B.So the ans is B...o/n 2010 varient 11 ques 22 and 38 anyone help.... Plzzzz
thnxoh yes I forgot. Okay so we know that in a plan diagram it shows the distribution of TISSUES , so in B a layer of palisade cells is a tissue so it is included , a vascular bundle is also a tissue, again included, now in D xylem vessel elements are actually dead CELLS , and in a plan diagram no individual cells should be included which makes it the right answer , if they would have said only the xylem vessel then it would have to be included in the plan diagram because it's a tissue. Apparently the cuticle is always drawn in a plan diagram , it's a tissue , it's made by the epidermis , but I don't really know why it's present:/
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