Summary
Summary Biology Notes Combined science 0653
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It covers almost all the basic and most important topics of igcse combined science biology.
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Available practice questions
Biology question
Flashcards
13 Flashcards
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Flashcards
13 Flashcards
$10.49
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Some examples from this set of practice questions
1.
What are the characteristics of living organism?
Answer: MRS GREN 1. Movement 2. Respiration 3. Sensitivity 4. Growth 5. Reproduction 6. Excretion 7. Nutrition
2.
Name 3 parts of cells that are not found in animal cell
Answer: 1. Cell wall 2. Vacuole 3. Chloroplast
3.
What is an enzyme?
Answer: A protein that acts as a biological catalyst.
4.
Test for starch
Answer: Iodine test Steps: Add iodine and if starch is present then the substance changes from brown to blue-black. And if not present then remains brown.
5.
Test for glucose
Answer: Benedict test Step: Benedict solution is added and heated in water. If the colour changes to orange-red then glucose is present
6.
Test for protein
Answer: Biuret test Steps: Add same amount of biuret solution as of the sample food. Then shake the solution and wait for 5 minutes. If colour change to purple then protein is present where as if it remains blue then no protein is present
7.
Test for fat
Answer: Ethanol test Steps: Add ethanol and if fat is present, it will dissolve in ethanol and form cloudy solution (white precipitate) .
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