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Biology Paper 12 Repeated and New Questions

mhalvi

mhalvi

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some others include:
1.types of cells in trachea...except for epidermis all were present as epidermis is in plant
2.why do animals need a transport system..1 only was correct
3. diastole and cardiac output graph...I think B was correct
 
mhalvi

mhalvi

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Amaryllis said:
the pressure one for aorta ventricle atria was it D?
and substrate product graph was A ?
and what about the tRNA question?
Click to expand...
I dont remember the correct option for the pressure but it was very simple..
substrate concentration graph was one in which thr were 2 curves substrate decreasing and product concentration increases
tRNA question 1 only was correct
 
good man12

good man12

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mhalvi said:
some others include:
1.types of cells in trachea...except for epidermis all were present as epidermis is in plant
2.why do animals need a transport system..1 only was correct
3. diastole and cardiac output graph...I think B was correct
Click to expand...
cardiac out put was C because the amount of blood in ventricle before contraction is ovviously equal to ventricular output, the ventricals empty completely
 
R

rogue94

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Here is the list of all the 40 Questions in the Biology 12 Paper. These are the questions that i remember, and they may not be in the correct order. I have only provided general statements and not the correct answers for the debatable questions! :)
1. size of eukaryotes. It was option C (10 um to 100 um).
2. The annotations question involving photomicrograph of a leaf. Option B was clearly incorrect and the majority of people i know are choose either option A or C.
3. What is present in all eukaryotes and not in prokaryotes? (it was chromatin).
4. Size of a viral particle (it was option D - 150 nm).
5. The food tests question (protein was absent and reducing sugar was present, however there is much debate on presence of fatty acids).
6. presence of C=O group (it was present in all 3: fatty acids, proteins and amino acids).
7. Which of the following is a reducing sugar? (it was fructose)
8. Question about structure of glycogen (correct option was one with alpha glucose, and 1,4 and 6 carbons).
9. Which statements can be used to describe both amylose and amylopectin? (alpha glucose and 1-4 glycosidic bonds were correct, whereas 1-6 glycosidic bond was incorrect.)
10. Why is resolution of light microscopes limited? (It was option D - related with wavelength)
11. Question about osmosis/net movement of water involving 3 adjacent cells with given water potentials (It was option D).
12. Which of the following processes are passive? (osmosis and facilitated diffusion were correct, and endocytosis was incorrect.)
13. Function of cholestrol in cell surface membranes (option D - regulates fluidity)
14. Glycosidic bond formation (option A, p-u and q-w) - this is a repeated question.
15. Product and substrate concentration graph (it was option A)
16. Glucose test of urine involving enzyme glucose oxidase (it was option C i guess - specific)
17. number of different tRNAs required (option A - 4) This is a repeated question.
18. Statements about tRNA (statement 3 was clearly incorrect and statement 1 was obviously correct. However, there is much debate about validity of statement number 2.)
19. What is required for transcription? (option A - DNA, ATP and free nucleotides.)
20. Correct sequence of occurances during mitosis. (option D) This is a repeated question.
21. Question involving radioactive nucleotides and cell cycle. (option A) This is a repeated question.
22. Why large animals need transport systems (statement 1 was correct only, statements 2 and 3 were incorrect.)
23. Question about circumference of a tree (option D - related to tension in xylem.) This is a repeated question.
24. What involves apoplast pathway (cell wall and xylem were correct only.)
25. Question about Casparian strip (option with endodermis and suberin).
26. Question about translocation in phloem (option with movement from X to Y and more pressure at X than Y. X was near leaf cell and Y was near root cell.)
27. Which of the following are present in all blood vessels, lymph and tissue fluid? (all those substances: glucose, CO2, wbcs and antibodies, are present.)
28. Question about graph involving stroke volume and ventricular end diastolic volume. Correct option was C (graph with straight light through origin).
29. The cardiac cycle pressure graph (Z was aorta, Y was left ventricle and X was left atrium).
30. Question about Bohr effect (option with increase in CO2 concentration and low pH.) This is a repeated question.
31. The trachea question (epidermis is not present whereas elastic fibres and smooth muscles are present).
32. Which component of cigarette smoke causes increase in blood pressure? (nicotine)
33. The COPD question (probably, only the last statement about reversible treatment was incorrect).
34. Immunity question with the antibody concentration-time graph. This is a repeated question (correct option was the one with memory cells.)
35. Injection of dead bacteria (passive was NO and artificial was YES).
36. Which of the following diseases are viral? (option with smallpox and measles.)
37. Question related to measures against spread of cholera (option with sewage treatment and water supply.)
38. Function of decomposers (convert proteins to ammonium ions - option A i guess)
39. The repeated question involving a food web. Answer was C (5 trophic levels).
40. The question involving fixation of only 4% of energy from sunlight by producers. Correct option was B (involving reflection from clouds....).

Please do correct me if I have posted a wrong question or have failed to mention the correct question(s). My answers may not be correct! :)
 
BILALrox01

BILALrox01

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rogue94 said:
Here is the list of all the 40 Questions in the Biology 12 Paper. These are the questions that i remember, and they may not be in the correct order. I have only provided general statements and not the correct answers for the debatable questions! :)
1. size of eukaryotes. It was option C (10 um to 100 um).
2. The annotations question involving photomicrograph of a leaf. Option B was clearly incorrect and the majority of people i know are choose either option A or C.
3. What is present in all eukaryotes and not in prokaryotes? (it was chromatin).
4. Size of a viral particle (it was option D - 150 nm).
5. The food tests question (protein was present and reducing sugar was absent, however there is much debate on presence of fatty acids).
6. presence of C=O group (it was present in all 3: fatty acids, proteins and amino acids).
7. Which of the following is a reducing sugar? (it was fructose)
8. Question about structure of glycogen (correct option was one with alpha glucose, and 1,4 and 6 carbons).
9. Which statements can be used to describe both amylose and amylopectin? (alpha glucose and 1-4 glycosidic bonds were correct, whereas 1-6 glycosidic bond was incorrect.)
10. Why is resolution of light microscopes limited? (It was option D - related with wavelength)
11. Question about osmosis/net movement of water involving 3 adjacent cells with given water potentials (It was option D).
12. Which of the following processes are passive? (osmosis and facilitated diffusion were correct, and endocytosis was incorrect.)
13. Function of cholestrol in cell surface membranes (option D - regulates fluidity)
14. Glycosidic bond formation (option A, p-u and q-w) - this is a repeated question.
15. Product and substrate concentration graph (it was option A)
16. Glucose test of urine involving enzyme glucose oxidase (it was option C i guess - specific)
17. number of different tRNAs required (option A - 4) This is a repeated question.
18. Statements about tRNA (statement 3 was clearly incorrect and statement 1 was obviously correct. However, there is much debate about validity of statement number 2.)
19. What is required for transcription? (option A - DNA, ATP and free nucleotides.)
20. Correct sequence of occurances during mitosis. (option D) This is a repeated question.
21. Question involving radioactive nucleotides and cell cycle. (option A) This is a repeated question.
22. Why large animals need transport systems (statement 1 was correct only, statements 2 and 3 were incorrect.)
23. Question about circumference of a tree (option D - related to tension in xylem.) This is a repeated question.
24. What involves apoplast pathway (cell wall and xylem were correct only.)
25. Question about Casparian strip (option with endodermis and suberin).
26. Question about translocation in phloem (option with movement from X to Y and more pressure at X than Y. X was near leaf cell and Y was near root cell.)
27. Which of the following are present in all blood vessels, lymph and tissue fluid? (all those substances: glucose, CO2, wbcs and antibodies, are present.)
28. Question about graph involving stroke volume and ventricular end diastolic volume. Correct option was A (graph with straight light through origin).
29. The cardiac cycle pressure graph (Z was aorta, Y was left ventricle and X was left atrium).
30. Question about Bohr effect (option with increase in CO2 concentration and low pH.) This is a repeated question.
31. The trachea question (epidermis is not present whereas elastic fibres and smooth muscles are present).
32. Which component of cigarette smoke causes increase in blood pressure? (nicotine)
33. The COPD question (probably, only the last statement about reversible treatment was incorrect).
34. Immunity question with the antibody concentration-time graph. This is a repeated question (correct option was the one with memory cells.)
35. Injection of dead bacteria (passive was NO and artificial was YES).
36. Which of the following diseases are viral? (option with smallpox and measles.)
37. Question related to measures against spread of cholera (option with sewage treatment and water supply.)
38. Function of decomposers (convert proteins to ammonium ions - option A i guess)
39. The repeated question involving a food web. Answer was C (5 trophic levels).
40. The question involving fixation of only 4% of energy from sunlight by producers. Correct option was B (involving reflection from clouds....).

Please do correct me if I have posted a wrong question or have failed to mention the correct question(s). My answers may not be correct! :)
Click to expand...
5 protein was present and 28
 
BILALrox01

BILALrox01

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rogue94 said:
I am very sorry! Protein was absent since colour with biuret test was blue. For Question 28 the correct option was C (with a straight line through origin, since both volumes are the same). Thank you for correcting me! :)
Click to expand...
u r welcum but ans was D
 
R

rogue94

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BILALrox01 said:
check the wikipedia link
Click to expand...
But the relationship is linear!!! no? :) so correct option must be C. In D there was a curve, so it cannot be D. Sorry, the volumes are not equal, i get that now, but they are proportionate i guess.
 
BILALrox01

BILALrox01

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rogue94 said:
But the relationship is linear!!! no? :) so correct option must be C. In D there was a curve, so it cannot be D. Sorry, the volumes are not equal, i get that now, but they are proportionate i guess.
Click to expand...
no the curve showed the stroke nd end diastolic pressure to b 200. both. so cant b C
 
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