And finally, I hope nothing like that was drawn in for your answers to Paper 4!
Tuesday, November 10, 2009
Final Post!
Ok, its the 95th post for this bio blog. I hope you guys have found the blog useful in your revision, cos its probably going to be put to death soon after the O levels. Enjoy yourselves after tomorrow's paper (but please be careful while doing the paper tomorrow ok! Remember its worth 20% and you need to get 40/40! All the best for tomorrow! Oh, and I must say that I've enjoyed teaching you guys. Take care, have a great hols, all the best and keep in touch!
And finally, I hope nothing like that was drawn in for your answers to Paper 4!
And finally, I hope nothing like that was drawn in for your answers to Paper 4!
MCQ Practice Questions 10
1. Green plants are unable to grow in depths of the ocean below 200 metres because of a lack of
A. oxygen.
B. carbon dioxide.
C. light.
D. mineral ions.
2. Mitosis and meiosis both involve division of the nucleus, containing pairs of chromosomes, and the distribution of the chromosomes to daughter nuclei. The daughter nuclei contain one chromosome from each original pair of chromosomes in
A. mitosis but not meiosis.
B. meiosis but not mitosis.
C. both mitosis and meiosis.
D. neither mitosis nor meiosis.
3. A recessive allele in cats causes kittens to develop six toes instead of the normal five. A cat heterozygous for this gene was crossed with a homozygous recessive individual. What is the chance of any one of the female kittens having six toes?
A. 25%
B. 50%
C. 75%
D. 100%
4. A component of bile juice which alters pH functions in the
A. large intestine.
B. stomach.
C. oesophagus.
D small intestine.
5. Three directions in which nerve impulses can travel in the nervous system are given
1. away from the central nervous system
2. towards the central nervous system
3. within the central nervous system
In which direction do impulses in sensory, relay (intermediate) and motor neurones travel?
Sensory neurone / relay neurone / motor neurone
A. 1 / 2 / 3
B. 1 / 3 / 2
C. 2 / 1 / 3
D. 2 / 3 / 1
ANswers
1. C
2. B
3. B
4. D
5. D
A. oxygen.
B. carbon dioxide.
C. light.
D. mineral ions.
2. Mitosis and meiosis both involve division of the nucleus, containing pairs of chromosomes, and the distribution of the chromosomes to daughter nuclei. The daughter nuclei contain one chromosome from each original pair of chromosomes in
A. mitosis but not meiosis.
B. meiosis but not mitosis.
C. both mitosis and meiosis.
D. neither mitosis nor meiosis.
3. A recessive allele in cats causes kittens to develop six toes instead of the normal five. A cat heterozygous for this gene was crossed with a homozygous recessive individual. What is the chance of any one of the female kittens having six toes?
A. 25%
B. 50%
C. 75%
D. 100%
4. A component of bile juice which alters pH functions in the
A. large intestine.
B. stomach.
C. oesophagus.
D small intestine.
5. Three directions in which nerve impulses can travel in the nervous system are given
1. away from the central nervous system
2. towards the central nervous system
3. within the central nervous system
In which direction do impulses in sensory, relay (intermediate) and motor neurones travel?
Sensory neurone / relay neurone / motor neurone
A. 1 / 2 / 3
B. 1 / 3 / 2
C. 2 / 1 / 3
D. 2 / 3 / 1
ANswers
1. C
2. B
3. B
4. D
5. D
MCQ Practice Questions 9
1. Which one of the following would be the result of cutting the vas deferentia (sperm ducts) on right and left sides in a male mammal ?
A. Male sex hormones would be no longer circulated in the blood.
B. The mammal would become sterile.
C. The mammal would be unable to pass urine.
D. The mammal would be unable to develop spermatozoa.
2. Genes affecting the same character or trait are located on the same position in homologous chromosomes. They are called
A. autosomes.
B. alleles.
C. loci.
D. chromatids.
3. Which of the following is an example of discontinuous variation ?
A. Range in height of pea plants from 30 to 50cm.
B. Offspring include two male cats and three female cats.
C. Pea plants grown in darkness are yellow.
D. Adult human skin colour ranges from fairness and darkness.
4. Three directions in which nerve impulses can travel in the nervous system are given
1. away from the central nervous system
2. towards the central nervous system
3. within the central nervous system
In which direction do impulses in sensory, relay (intermediate) and motor neurones travel?
Sensory neurone / relay neurone / motor neurone
A. 1 / 2 / 3
B. 1 / 3 / 2
C. 2 / 1 / 3
D. 2 / 3 / 1
5. Which of the following microorganisms help in the decomposition of sewage ?
A. Autotrophic organisms
B. Saprophytic organisms
C. Parasitic organisms
D. Both saprophytic and parasitic organisms
Answers
1.B
2.B
3.B
4. D
5. B
A. Male sex hormones would be no longer circulated in the blood.
B. The mammal would become sterile.
C. The mammal would be unable to pass urine.
D. The mammal would be unable to develop spermatozoa.
2. Genes affecting the same character or trait are located on the same position in homologous chromosomes. They are called
A. autosomes.
B. alleles.
C. loci.
D. chromatids.
3. Which of the following is an example of discontinuous variation ?
A. Range in height of pea plants from 30 to 50cm.
B. Offspring include two male cats and three female cats.
C. Pea plants grown in darkness are yellow.
D. Adult human skin colour ranges from fairness and darkness.
4. Three directions in which nerve impulses can travel in the nervous system are given
1. away from the central nervous system
2. towards the central nervous system
3. within the central nervous system
In which direction do impulses in sensory, relay (intermediate) and motor neurones travel?
Sensory neurone / relay neurone / motor neurone
A. 1 / 2 / 3
B. 1 / 3 / 2
C. 2 / 1 / 3
D. 2 / 3 / 1
5. Which of the following microorganisms help in the decomposition of sewage ?
A. Autotrophic organisms
B. Saprophytic organisms
C. Parasitic organisms
D. Both saprophytic and parasitic organisms
Answers
1.B
2.B
3.B
4. D
5. B
MCQ Practice Questions 8
1. The correct sequence, from the smallest to the largest units, is
A. organelles, cells, tissues, organs, systems.
B. organelles, systems, organs, tissues, cells.
C. cells, organelles, tissues, organs, systems.
D. cells, tissues, organs, organelles, systems.
Questions 2 and 3 refer to the following diagrams.
2. Take a 3 cm length of balsam stem. Cut it into four longitudinal strips. Take two strips, X and Y, place X in solution P and Y in solution Q. The diagram below shows the appearance of X and Y at the start of the experiment and 15 minutes later.Which of the following could be a possible description of P and Q?
A. P: syrup; Q: water
B. P: brine; Q: distilled water
C. P: brine; Q: syrup
D. P: distilled water; Q: brine
3. Name the processes that have brought about the changes in X and Y.
A. X: diffusion; Y: osmosis
B. X: osmosis; Y: diffusion
C. X: endosmosis; Y: exosmosis
D. X: exosmosis; Y: endosmosis
4. In an experiment, the apparatus shown in the diagram below was left in the light for two days. The leaf 1 and leaf 2 were then tested for starch.
The experiment could be used to show that, during starch formation
A. carbon dioxide is absorbed
B. carbon dioxide is given off
C. light is absorbed
D. oxygen is absorbed
5. Biological washing powders remove stains by enzyme action. Which of the following combinations would be most effective in removing an egg stain?
A. Amylase and protease
B. Catalase and lipase
C. Lipase and maltase
D. Lipase and protease
6. Which is the correct priority in a human body of using the following substances to release energy?
A. Glycogen, fat, tissue protein
B. Fat, glycogen, tissue protein
C. Tissue protein, glycogen, fat
D. Tissue protein, fat, glycogen
Answers
1. A
2. D
3. C
4. A
5. D
6. A
A. organelles, cells, tissues, organs, systems.
B. organelles, systems, organs, tissues, cells.
C. cells, organelles, tissues, organs, systems.
D. cells, tissues, organs, organelles, systems.
Questions 2 and 3 refer to the following diagrams.
2. Take a 3 cm length of balsam stem. Cut it into four longitudinal strips. Take two strips, X and Y, place X in solution P and Y in solution Q. The diagram below shows the appearance of X and Y at the start of the experiment and 15 minutes later.Which of the following could be a possible description of P and Q?
A. P: syrup; Q: water
B. P: brine; Q: distilled water
C. P: brine; Q: syrup
D. P: distilled water; Q: brine
3. Name the processes that have brought about the changes in X and Y.
A. X: diffusion; Y: osmosis
B. X: osmosis; Y: diffusion
C. X: endosmosis; Y: exosmosis
D. X: exosmosis; Y: endosmosis
4. In an experiment, the apparatus shown in the diagram below was left in the light for two days. The leaf 1 and leaf 2 were then tested for starch.
The experiment could be used to show that, during starch formation
A. carbon dioxide is absorbed
B. carbon dioxide is given off
C. light is absorbed
D. oxygen is absorbed
5. Biological washing powders remove stains by enzyme action. Which of the following combinations would be most effective in removing an egg stain?
A. Amylase and protease
B. Catalase and lipase
C. Lipase and maltase
D. Lipase and protease
6. Which is the correct priority in a human body of using the following substances to release energy?
A. Glycogen, fat, tissue protein
B. Fat, glycogen, tissue protein
C. Tissue protein, glycogen, fat
D. Tissue protein, fat, glycogen
Answers
1. A
2. D
3. C
4. A
5. D
6. A
MCQ Practice Questions 7
1. Which of the following food substances, when surplus to the body needs, undergoes conversion by deamination
A. glucose
B. glycerol
C. amino acids
D. fatty acids
2. 6. Where do green plants obtain the following elements for photosynthesis?
Carbon / Hydrogen
A. Air / Soil
B. Soil / Air
C. Water / Humus
D. Humus / Water
3. The following diagram shows the apparatus assembled by a group of students to investigate the effect of light intensity on the rate of photosynthesis.
Which of the following should be done to improve the procedure and eliminate a possible limiting factor ?
A. Insert a transparent heat shield between the lamp and the plant.
B. Immerse the green plant in pond water rich in carbon dioxide.
C. Use dilute sodium hydrogen carbonate solution in the large tank.
D. Remove the lead weight to allow the plant to float at the surface of the water.
Questions 4 & 5 refer to the following diagram of a family tree where the allele for wavy hair (W) is dominant to the allele for straight hair (w).
4. If person R is homozygous for the wavy hair alleles, which statement is true about persons R and S ?
A. They have the same phenotype and the same genotype.
B. They differ in phenotype but have the same genotype.
C. They differ in both phenotype and genotype.
D. They have the same phenotype but differ in genotype.
5. The chance of persons S and T producing a straight-haired child is
A. 1 in 1.
B. 1 in 2.
C. 1 in 3.
D. 1 in 4.
6. The diagram shows the carbon cycle.What are processes P, Q and R?
P / Q / R
A. photosynthesis / respiration / photosynthesis
B. photosynthesis / photosynthesis / respiration
C. respiration / photosynthesis / respiration
D. respiration / respiration / photosynthesis
7. The diagram shows the front part of an eye.
Which changes take place in the eye when a person looks up from reading a book to view a distant airplane?
Ciliary muscle / Lens
A. contracts / becomes thicker
B. contracts / becomes thinner
C. relaxes / becomes thicker
D. relaxes / becomes thinner
Answers
1. C
2. A
3. B
4. D
5. B
6. C
7. D
A. glucose
B. glycerol
C. amino acids
D. fatty acids
2. 6. Where do green plants obtain the following elements for photosynthesis?
Carbon / Hydrogen
A. Air / Soil
B. Soil / Air
C. Water / Humus
D. Humus / Water
3. The following diagram shows the apparatus assembled by a group of students to investigate the effect of light intensity on the rate of photosynthesis.
Which of the following should be done to improve the procedure and eliminate a possible limiting factor ?
A. Insert a transparent heat shield between the lamp and the plant.
B. Immerse the green plant in pond water rich in carbon dioxide.
C. Use dilute sodium hydrogen carbonate solution in the large tank.
D. Remove the lead weight to allow the plant to float at the surface of the water.
Questions 4 & 5 refer to the following diagram of a family tree where the allele for wavy hair (W) is dominant to the allele for straight hair (w).
4. If person R is homozygous for the wavy hair alleles, which statement is true about persons R and S ?
A. They have the same phenotype and the same genotype.
B. They differ in phenotype but have the same genotype.
C. They differ in both phenotype and genotype.
D. They have the same phenotype but differ in genotype.
5. The chance of persons S and T producing a straight-haired child is
A. 1 in 1.
B. 1 in 2.
C. 1 in 3.
D. 1 in 4.
6. The diagram shows the carbon cycle.What are processes P, Q and R?
P / Q / R
A. photosynthesis / respiration / photosynthesis
B. photosynthesis / photosynthesis / respiration
C. respiration / photosynthesis / respiration
D. respiration / respiration / photosynthesis
7. The diagram shows the front part of an eye.
Which changes take place in the eye when a person looks up from reading a book to view a distant airplane?
Ciliary muscle / Lens
A. contracts / becomes thicker
B. contracts / becomes thinner
C. relaxes / becomes thicker
D. relaxes / becomes thinner
Answers
1. C
2. A
3. B
4. D
5. B
6. C
7. D
Monday, November 9, 2009
MCQ Practice Questions 6
1. The diagram below shows the blood supply to the liver and gut.What are X, Y and Z?
artery / portal vein / vein
A. X / Y / Z
B. Y / Z / X
C. Z / X / Y
D. Y / X / Z
2. Blood entering the heart of a mammal from the posterior vena cava has most recently been in the
A. brain.
B. lungs.
C. left ventricle.
D. lower abdomen.
3. Human blood passes from the inferior (posterior) vena cava into the diastolic right atrium of the heart as a result of
A. a pressure differential between the atrium and the vena cava.
B. the closure of venous valves.
C. the closure of the tricuspid valve.
D. mass flow of blood.
4. Blood returning from the brain to the heart will enter the
A. right atrium
B. left atrium
C. right ventricle
D. left ventricle
5. The vein containing most glucose, amino acids, minerals and vitamins, after a meal is the
A. hepatic vein
B. renal vein
C. hepatic portal vein
D. pulmonary vein
6. Which of the following sequences represents the correct order of flow of blood in the heart when it enters from the pulmonary vein ?
1 right ventricle
2 right auricle
3 left auricle
4 aorta
5 left ventricle
A. 5 3 4 1 2
B. 2 1 3 5 4
C. 3 5 4 2 1
D. 1 2 4 5 3
7. Biological washing powders remove stains by enzyme action. Which of the following combinations would be most effective in removing an egg stain?
A. Amylase and protease
B. Catalase and lipase
C. Lipase and maltase
D. Lipase and protease
8. Which is the correct priority in a human body of using the following substances to release energy?
A. Glycogen, fat, tissue protein
B. Fat, glycogen, tissue protein
C. Tissue protein, glycogen, fat
D. Tissue protein, fat, glycogen
9. The concentration of a certain mineral ion in soil water is 50 parts per million (ppm). Inside the root hair cell vacuole, the same nutrient ion concentration is 200 ppm. This nutrient enters the root hair from the soil water by
A. diffusion.
B. osmosis.
C. filtration.
D. active transport.
10. Mitosis is essential and necessary in the unicellular organism for
A. tissue formation.
B. growth in size.
C. reproduction.
D. vacuolation.
ANSWERS
1. B
2. D
3. A
4. A
5. C
6. C
7. D
8. A
9. D
10. C
artery / portal vein / vein
A. X / Y / Z
B. Y / Z / X
C. Z / X / Y
D. Y / X / Z
2. Blood entering the heart of a mammal from the posterior vena cava has most recently been in the
A. brain.
B. lungs.
C. left ventricle.
D. lower abdomen.
3. Human blood passes from the inferior (posterior) vena cava into the diastolic right atrium of the heart as a result of
A. a pressure differential between the atrium and the vena cava.
B. the closure of venous valves.
C. the closure of the tricuspid valve.
D. mass flow of blood.
4. Blood returning from the brain to the heart will enter the
A. right atrium
B. left atrium
C. right ventricle
D. left ventricle
5. The vein containing most glucose, amino acids, minerals and vitamins, after a meal is the
A. hepatic vein
B. renal vein
C. hepatic portal vein
D. pulmonary vein
6. Which of the following sequences represents the correct order of flow of blood in the heart when it enters from the pulmonary vein ?
1 right ventricle
2 right auricle
3 left auricle
4 aorta
5 left ventricle
A. 5 3 4 1 2
B. 2 1 3 5 4
C. 3 5 4 2 1
D. 1 2 4 5 3
7. Biological washing powders remove stains by enzyme action. Which of the following combinations would be most effective in removing an egg stain?
A. Amylase and protease
B. Catalase and lipase
C. Lipase and maltase
D. Lipase and protease
8. Which is the correct priority in a human body of using the following substances to release energy?
A. Glycogen, fat, tissue protein
B. Fat, glycogen, tissue protein
C. Tissue protein, glycogen, fat
D. Tissue protein, fat, glycogen
9. The concentration of a certain mineral ion in soil water is 50 parts per million (ppm). Inside the root hair cell vacuole, the same nutrient ion concentration is 200 ppm. This nutrient enters the root hair from the soil water by
A. diffusion.
B. osmosis.
C. filtration.
D. active transport.
10. Mitosis is essential and necessary in the unicellular organism for
A. tissue formation.
B. growth in size.
C. reproduction.
D. vacuolation.
ANSWERS
1. B
2. D
3. A
4. A
5. C
6. C
7. D
8. A
9. D
10. C
What to focus on for Paper 1...
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!
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!
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