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35 Cards in this Set
- Front
- Back
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in carbohydrates, which two elements are in the ratio 2:1?
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Hydrogen and oxygen
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Explain the term Polysaccharide.
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A Polysaccharide is a macromolecule composed of many monosaccharides.
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Name a polysaccharide other than cellulose.
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starch
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Where precisely in a plant cell would you find cellulose?
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In the cell wall of plants
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Name a test or give the chemicals usedto demonstrate the presence of a reducing sugar.
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Benedicts reagent
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in relation to the test above, which is correct?
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Heat not boil
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Define Predation.
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the killing of one animal by another animal for food.
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Explain the term niche.
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the functional role of an organism or species in the community
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Name an anabolic process carried out by plants.
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Photosynthesis.
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Explain the term edaphic.
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a soil feature that influences the growth of plants or animals.
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Give an example of an edaphic factor.
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in a seashore habitat, the edaphic factors are the influences of the type of material lying between high and low tide--sand, shingle or solid rock.
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What is genetic engineering?
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manipulation and alteration of genes for research or commarce.
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Name 3 processes involved in genetic engeering.
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1. Isolation.
2. Transformation 3. Expression |
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Give an example of an application of genetic engineering in each of the following cases.
1. A micro-organism 2. An animal 3. A plant |
1. Bacteria - to carry the human insulin gene.
2. Sheep- to carry human blood clotting factor gene. 3. Some have been given genes that give them the abilty to produce "natural" insecticides |
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Give one location where mitosis occurs in flowering plants.
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embryo sacs in the ovules.
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Give one function of mitosis in multicellular organisms.
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Growth
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What is the function of mitosis in single celled organisms?
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reproduction
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Biomolecules of the general formula Cx(H2O)y are examples of...
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Carbohydrates
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Gice two functions of water in a living oranism.
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1.Moves materals in and out of cells
2. Energy absorber |
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Is energy release a feature of anabolic or catabolic reactions?
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Catabolic
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How do fats differ from oils at room temperature?
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Fats can be solid as well as liquid
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Name the test or give the chemicals used to detect the presence of protein in a food sample.
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Biuret reagent
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Name a structural polysaccharide.
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Cellulose
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The diagram represents the cell cycle.
(a)What stage of the cycle is represented by x? (b)Give the names of the 2 processes involving DNA which takes place during stage X |
(a)Interphase.
(b) Dna Replication and Growth |
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Expalin the term diploid number.
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The number of chromosomes in most cells except the gametes
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which stage does the spindle fibre contract?
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Stage 3
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name the 4 staes in mitosis.
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1.interphase.
2. prophase 3. metaphase 4. anaphase |
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What term is used to describe a group of disorders of the body in which cells lose the normal regulation of mitosis?
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Malignant
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Whats the equation to represent aerobic respiration?
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glucose+oxygen~ carbon dioxide+water+energy
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What is the cytosol?
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the cytoplasmic solution
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What is Fermentation
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anaerobic respiration by certain bacteria and yeasts
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Does the first stage of respiration release a small or large amount of energy?
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A small amount
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Where in the cell does the second stage of aerobic respiration take place?
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Mitochondria
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Is oxygen required for the second stage of respiration?
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Yes
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Suggest a situation in which some cells in the human body may not be able to engage in the second stage of aerobic respiration.
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if free oxygen is present.
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