Dear guys..
Since these topics have already come out for P4, i dont think they will be tested much in P1. So dont focus on these:
Functions of Liver, Digestion, Sewage treatment, Respiratory System, Smoking, Blood and CHD, Pyramids of biomass and numbers and hormones.
Instead you may want to focus your revision on:
Cells
Osmosis, Diffusion
Heart
Photosynthesis
Eyes
Nervous system
Reproduction in Plants and Humans
Genetics
One more day, practice as many questions as possible.. ill be uploading mzq qns from now tlll evening like crazy.
Try these if uve done all the TYS qns k.
Good luck guys!
Showing posts with label Things to note. Show all posts
Showing posts with label Things to note. Show all posts
Monday, November 9, 2009
Sunday, November 8, 2009
PAPER 1 in 3 days time...
Hi Guys,
Hope you all have done well in Paper 4.
Hmm, am not sure how many of you have declared this the "post-exam" break already! Anyway, do focus on practicing your TYS as your main priority.
Things to remember for Paper 1:
1. Don't leave shading the OAS to the last 15 minutes. Its best to shade the answers as you go along.
2. Biology MCQ Qns are from 21 to 40. Don't start from Question 40 and work your way backwards, in case you shade the wrong options in the OAS along the way.
3. If you are stuck at a question, move on and come back to it later, but ensure you do leave the OAS blank for that particular question.
4. Watch your time, 1 min per MCQ, 20 min for questions where you got stuck or are not sure and of course, for checking.
5. Double and triple-check: That you have the correct answers shaded, that you read the questions correctly, that you chose the BEST possible option, not the first option that seems correct.
6. You can highlight main points as you go along to help in your thinking process, as the question paper will not be submitted.
7. Note words in bold/underlined. Those will be very important words!
Some more things to remember with regards to phrasing:
1. is / is not
2. true / false
3. correct / incorrect
4. most accurate / best describes...
5. will not be observed / does not explain the results
6. is / is not a limiting factor
Seems very straightforward, but many people tend to make careless mistakes and read the questions wrongly. Do be careful when you read the questions ok... Don't give away your precious marks! For those who have finished all TYS Qns, Ill upload more MCQ Qns from Mon night onwards. Click on the label on the right MCQ QUESTIONS and practice k. This is really the last lap. So, All the best!
Hope you all have done well in Paper 4.
Hmm, am not sure how many of you have declared this the "post-exam" break already! Anyway, do focus on practicing your TYS as your main priority.
Things to remember for Paper 1:
1. Don't leave shading the OAS to the last 15 minutes. Its best to shade the answers as you go along.
2. Biology MCQ Qns are from 21 to 40. Don't start from Question 40 and work your way backwards, in case you shade the wrong options in the OAS along the way.
3. If you are stuck at a question, move on and come back to it later, but ensure you do leave the OAS blank for that particular question.
4. Watch your time, 1 min per MCQ, 20 min for questions where you got stuck or are not sure and of course, for checking.
5. Double and triple-check: That you have the correct answers shaded, that you read the questions correctly, that you chose the BEST possible option, not the first option that seems correct.
6. You can highlight main points as you go along to help in your thinking process, as the question paper will not be submitted.
7. Note words in bold/underlined. Those will be very important words!
Some more things to remember with regards to phrasing:
1. is / is not
2. true / false
3. correct / incorrect
4. most accurate / best describes...
5. will not be observed / does not explain the results
6. is / is not a limiting factor
Seems very straightforward, but many people tend to make careless mistakes and read the questions wrongly. Do be careful when you read the questions ok... Don't give away your precious marks! For those who have finished all TYS Qns, Ill upload more MCQ Qns from Mon night onwards. Click on the label on the right MCQ QUESTIONS and practice k. This is really the last lap. So, All the best!
Sunday, October 25, 2009
ANSWERS to some queries posted..
Reminders for some topics:
a. Genetics: Remember that we may not get an exact 3:1/1:1 ratio all the time, especially with small numbers of offspring. This is due to random fertilisation, where any 1 male gamete can fertilise any 1 female gamete. But the ratio can be used to predict probability (in fractions) or chance (in percentage). The ratio is only observed with a large number of offspring (eg. Mendel's experiments with peas usually dealt with a few thousand offspring).
b. Tissue: Group of cells that perform a specific function.
Organ: Group of tissues that work together to perform a specific function or group of functions.
System: Group of organs that work together for a specific purpose.
c. Microscope slide preparation (For those who keep asking): Basically it should be tested under PRCATICAL instead. But... just in case, its just placing a thin slice of specimen on the slide, add a drop of water or stain (methylene blue/iodine), then lowering the coverslip at an angle slowly so that no air bubbles form. Dry slide before viewing.
d. Qn on: State three ways in which the movement of the hand away after touching a hot object differs from a deliberate decision to lower the arm.
1. This action requires a stimulus (heat/pain) while a deliberate decision does not require a stimulus;
2. This action requires a receptor to detect the stimulus, while a deliberate decision does not require a receptor;
3. Involves a pathway through the spinal cord and does not directly involve the brain, while a deliberate decision would involve a nervous impulse that originates from the brain;
4. Not under conscious control/involuntary, while the deliberate decision would be under conscious control/voluntary;
a. Genetics: Remember that we may not get an exact 3:1/1:1 ratio all the time, especially with small numbers of offspring. This is due to random fertilisation, where any 1 male gamete can fertilise any 1 female gamete. But the ratio can be used to predict probability (in fractions) or chance (in percentage). The ratio is only observed with a large number of offspring (eg. Mendel's experiments with peas usually dealt with a few thousand offspring).
b. Tissue: Group of cells that perform a specific function.
Organ: Group of tissues that work together to perform a specific function or group of functions.
System: Group of organs that work together for a specific purpose.
c. Microscope slide preparation (For those who keep asking): Basically it should be tested under PRCATICAL instead. But... just in case, its just placing a thin slice of specimen on the slide, add a drop of water or stain (methylene blue/iodine), then lowering the coverslip at an angle slowly so that no air bubbles form. Dry slide before viewing.
d. Qn on: State three ways in which the movement of the hand away after touching a hot object differs from a deliberate decision to lower the arm.
1. This action requires a stimulus (heat/pain) while a deliberate decision does not require a stimulus;
2. This action requires a receptor to detect the stimulus, while a deliberate decision does not require a receptor;
3. Involves a pathway through the spinal cord and does not directly involve the brain, while a deliberate decision would involve a nervous impulse that originates from the brain;
4. Not under conscious control/involuntary, while the deliberate decision would be under conscious control/voluntary;
Saturday, September 5, 2009
Things to remember for Paper 1
Paper 1 has 2 components. Question 1-20 would either be chem/physics and 21-40 would be bio.
Some things to remember for Paper 1:
1. Don't leave shading the OAS to the last 15 minutes. Its best to shade the answers as you go along.
2. If you are stuck at a question, move on and come back to it later, but ensure you do leave the OAS blank for that particular question.
3. Watch your time, 1 min per MCQ, 20 min for questions where you got stuck or are not sure and of course, for checking.
4. Double and triple-check: That you have the correct answers shaded, that you read the questions correctly, that you chose the BEST possible option, not the first option that seems correct.
5. You can highlight main points as you go along to help in your thinking process, as the question paper will not be submitted.
6. Note words in bold/underlined. Those will be very important words!
Some things to remember for Paper 1:
1. Don't leave shading the OAS to the last 15 minutes. Its best to shade the answers as you go along.
2. If you are stuck at a question, move on and come back to it later, but ensure you do leave the OAS blank for that particular question.
3. Watch your time, 1 min per MCQ, 20 min for questions where you got stuck or are not sure and of course, for checking.
4. Double and triple-check: That you have the correct answers shaded, that you read the questions correctly, that you chose the BEST possible option, not the first option that seems correct.
5. You can highlight main points as you go along to help in your thinking process, as the question paper will not be submitted.
6. Note words in bold/underlined. Those will be very important words!
Friday, August 28, 2009
osmosis and diffusion
Turgid, Flaccid and Plasmolysis are terms used only for PLANT cells.
Instead, for a RBC, terms like haemolysis (bursting or lysis) and crenation (shrinkage) should be used.
State specifically the shape of the RBC as being flattened and bi-concave.
Terms such as Exosmosis and Endosmosis should be used when referring to living cells only. The term Osmosis should be used when referring to experiments with non-living membranes such as visking tubings/dialysis tubings.
When referring to osmosis, use the term water potential, not water concentration as well as water potential gradient, not concentration gradient.
If there is equal water potential in both cell and solution, state that the water potential gradient is zero resulting in no net movement of water molecules, thus no osmosis.
Use the template that is on the blog to help you phrase your answers!
Instead, for a RBC, terms like haemolysis (bursting or lysis) and crenation (shrinkage) should be used.
State specifically the shape of the RBC as being flattened and bi-concave.
Terms such as Exosmosis and Endosmosis should be used when referring to living cells only. The term Osmosis should be used when referring to experiments with non-living membranes such as visking tubings/dialysis tubings.
When referring to osmosis, use the term water potential, not water concentration as well as water potential gradient, not concentration gradient.
If there is equal water potential in both cell and solution, state that the water potential gradient is zero resulting in no net movement of water molecules, thus no osmosis.
Use the template that is on the blog to help you phrase your answers!
Thursday, August 27, 2009
Some confusing terms...
Ok, some terms starting with "e" that are causing some confusion:
Epithelium/epithelial cells: Tissue that makes up the layer that covers the surface of organs, cavities, vessels and tubes in animals, like the surface of the gut (eg, villi of the ileum).
Endothelium:A type of epithelium that lines the inner surface of the blood vessels (eg, one cell thick capillary wall).
Epidermis/epidermal cells:Makes up the layer that covers the surface of plant parts, like the roots, stem and leaves.
Endometrium:Inner lining of the uterus that breaks down and is shed during menstruation. This lining thickens and is where the blastocyst implants.
Epithelium/epithelial cells: Tissue that makes up the layer that covers the surface of organs, cavities, vessels and tubes in animals, like the surface of the gut (eg, villi of the ileum).
Endothelium:A type of epithelium that lines the inner surface of the blood vessels (eg, one cell thick capillary wall).
Epidermis/epidermal cells:Makes up the layer that covers the surface of plant parts, like the roots, stem and leaves.
Endometrium:Inner lining of the uterus that breaks down and is shed during menstruation. This lining thickens and is where the blastocyst implants.
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