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7 Indicate whether each of the following statements is True or False Motor neurons conduct impulses away from the RNA is not found in ribosomes. False 24 CNS. HIV/AIDS has orphaned many children in subTrue The growth response of a plant to chemicals is Saharan Africa. 25 geotropism. Single-celled organisms use mitosis for True 26 Monocotyledonous plants have parallel leaf veins. reproduction. Lenses closest to the stage are the eyepiece Immobilised enzymes can act as catalysts. True 27 lenses. All vitamins are fat soluble. False 28 Plant cell walls are fully permeable. The growth response of a plant to light is True 29 A polysaccharide contains many sugar units. phototropism. The liver produces bile. 30 Meiosis is never involved in gamete formation. True 8 Humans receive oxygen from air they inhale. 9 Light is essential for the germination of seeds. 10 The cells produced by meiosis are haploid. 11 13 Cloned individuals are exactly the same. A sperm contains the diploid number of chromosomes. Chromosomes are made of DNA and lipid. 14 Vaccination gives rise to active immunity. 15 Meiosis gives rise to variation. 16 Food chains are usually short. 17 19 Lactic acid is a product of anaerobic respiration. Organisms of the same species usually produce fertile offspring. All individuals within a species are the same. 20 Chloroplasts contain DNA. 21 Enzymes are essential for metabolism. 22 Red blood cells have no nucleus. 23 The pacemaker is on the left side of the heart. 1 2 3 4 5 6 12 18 True False True True 31 Iodine turns starch to a blue-black colour. 32 Carbon dioxide is produced during respiration. 33 Immobilised enzymes cannot act as catalysts. 34 False 35 False True True True True 36 Bones are joined to other bones by ligaments. Stage 2 of respiration takes place in the cytoplasm. The cells produced by mitosis are identical. 37 39 DNA is a double helical shape. Aerobic respiration is the release of energy in the absence of oxygen. Eggs are a good source of fat in the diet. 40 Chromosomes are found in the nucleus. True 41 False True True True False 42 Stage 1 of respiration requires oxygen. The remaining natural ecosystems are ones for which we have no use. The base Uracil is found in DNA. 38 43 44 45 Herbivores normally live long lives. Stage 1 of respiration takes place in the cytoplasm. True False True False True True False True True False True False True True False True True False True False False True 51 Indicate whether each of the following statements is True or False Nutrition is the way living organisms get rid of Lipids are made of amino acids. False 69 waste. Mitosis divides a nucleus into two identical nuclei. True The term abiotic refers to the living factors in an 70 Some energy released in respiration is lost as ecosystem. True heat. In science, a hypothesis is an educated guess 71 Osmosis is responsible for uptake of minerals. False based on observations. In experiments the factor that is changed is called The products of vegetative propagation are 72 True the variable. clones. 73 Grazing food chains begin with animals. Urea is formed in the kidneys. False 52 Cell membranes are semipermeable. 53 Animal cells do not have membranes. 54 Enzymes are not essential for metabolism. 55 Phloem transports water in plants. 56 A potato is a modified stem. 57 A motor neuron carries impulses to the brain. 58 Glucose is a monosaccharide. 59 Lenticels serve the same function as stomata. 60 Mitosis always produces four new cells. 61 Nitrogen is a trace element. 62 Plant cells have chloroplasts. 63 Tendons attach bone to bone. 64 Endosperm is a food reserve in some seeds. Intraspecies competition is more intense than interspecies competition. The liver produces bile. Metabolism is the sum of all the chemical reactions in the body. Anabolism is the breaking down of large molecules. 46 47 48 49 50 65 66 67 68 True False False False True False True True False False True False True 74 Alleles are different forms of the same gene. 75 Chromosomes are made up of DNA and protein. 76 A human sperm cell contains 23 chromosomes. 77 Phenotype is the genetic make-up of an organism. 78 Replication is the copying of DNA. 79 RNA contains the base thymine. Genetic engineering is the manipulation and alteration of genes. The copying of the DNA code into mRNA is called transcription. 80 81 False True True True False True True True False True False True True False 83 Single-celled organisms use meiosis for asexual reproduction. In telophase of mitosis, a cleavage furrow forms in plant cells. 84 When a cell is not dividing it is said to be in prophase. False 85 True True The nuclear membrane disappears in the early part of mitosis. 86 Centromeres give rise to the nuclear spindle. True 87 Mitosis is a source of variation. True False True 88 In multicellular organisms mitosis is primarily used for growth. True False 82 True