IGCSE BIOLOGY GENERAL REVIEW Ch. 1-5 | Baamboozle - Baamboozle

How would you test the presence of REDUCING SUGARS? (simple sugars)

Add BENNEDICT'S REAGENT (blue), mix, heat in a water bath for 3min. In the presence of sugar a RED PRECIPITATED appears.

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With all the info from the picture classify each solution depending on its tonicity

1. Hypertonic solution / 2. Isotonic solution / 3.Hypotonic solution

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Define the term SPECIES

A group of organisms that can reproduce to produce fertile offspring.

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seesaw

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gift

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fairy

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lifesaver

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How would you test the presence of FATS?

EMULSION test: alcohol + water. MILKY-WHITE emulsion.

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Why viruses are not considered living organisms and why aren't destroyed by antibiotics?

They can't live without a host (no MRS GREN). Antibiotics attack bacterial structures that viruses don't have (cell wall, cell membreane)

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Explain the difference between PASSIVE and ACTIVE transport.

Active transport: movement of particles AGAINST a concentration gradient and using energy from cellular respiration.

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Use all your knowledge about ENZYMES to explain the following image:

The rate of reaction is affected by pH, not all enzymes work at the same pH, there's an optimum pH, denaturalisation, etc.

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lifesaver

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magnet

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rocket

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thief

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trap

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gold

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gift

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lifesaver

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Explain how to calculate the MAGNIFICATION of an image.

M= I/A Magnification = Observed size of the IMAGE (or drawing) / ACTUAL size of the specimen

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Name the 4 factors that affect the RATE of ENZYME ACTION.

Temperature, pH, concentration of enzyme, concentration of substrate.

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thief

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seesaw

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gift

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banana

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Name the characteristics of all living organisms.

Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition

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The picture shows and ANIMAL cell and a PALLISADE cell. Identify them and name their components.

Animal: Cell membrane, nucleous, mitochondria, cytoplasm. Plant: the same as animal PLUS cell wall, chloroplasts and big vacuole.

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Name the principal clases of the following groups: VERTEBRATES, ARTHROPODS, MOLLUSCS

VERTEBRATES: Mammals, Reptiles, Fish, Amphibians, Birds / ARTHROPODS: Crustaceans, Arachnids, Myriapods, Insects / MOLLUSCS: Bivalves, Gastropods, Cephalopods

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