Welcome to your OCR AS Biology 2 1. A plant cell in a photograph measures 25 mm across. If the actual size of the cell is 0.025 mm, what is the magnification in the photograph? x100 x1000 x10 x100002. Select the incorrect sentence out of the following. A high magnification does not always guarantee a high resolution. Magnification and resolution are not dependant on each other. Resolution is the ability of optical instruments to produce images that are clearer, finer, and sharper. Magnification is the ability of optical instruments to make an object bigger.3. The lungs are in the _________ surrounded by the ___________ which enclose an airtight space. Pleural membranes, thoracic cavity Trachea, bronchus Bronchus, pleural membranes Thoracic cavity, pleural membranes4. What is the respiratory organ of a fish? Gills Skin Lungs Book lungs5. How does gas exchange take place within alveoli? Active transport Diffusion Osmosis Cutaneous respiration6. The accepted theory of how eukaryotic cells evolved from prokaryotic cells. Cell theory Endosymbiont theory Fermentation theory Darwinism7. If a specimen appeared 20mm in length under a microscope with a magnification of 1,000 times, what is the calculation of the actual length? 0.002 0.02 0.2 28. How do some varieties of rice respond to flooding? By growing horizontally. By dropping leaves. By growing tall. By getting submerged in water.9. Select the incorrect statement regarding gaseous exchange. a) Amoeba has a large surface area to volume ratio. b) Amoeba takes in oxygen by diffusion across the body surface. c) An elephant has a smaller surface area to volume ratio when compared to an amoeba. d) Elephants have special respiratory organs such as the lungs. a, b, c a, b, d a & d only None10. A similarity between transmission electron microscope and scanning electron microscope. Both are used to observe dead organisms. Both can attain the same amount of magnification. Both produce a 3D visual image. Both can be used to view the insides of each organelle.11. Select the incorrect statement from the following. Uncontrolled cell division can lead to the formation of tumours and of cancers. Mitosis is a controlled process. Many cancer treatments are directed at controlling the rate of cell division. Reproduction in prokaryotic cells happen through meiosis or mitosis.12. Which of the following is not correctly paired? Rough endoplasmic reticulum-protein synthesis Smooth endoplasmic reticulum-processing, packaging, secretion Nucleus-cellular reproduction Chloroplast-photosynthesis13. Which of the following is found in plant cells but not in bacteria? RNA Ribosomes Mitochondria Cell membrane14. The gas exchange surface in a human being. Bronchioles Trachea Alveoli Diaphragm15. The protective protein coat in a virus. Tail Fibres Capsid Membrane envelope16. Select the incorrect statement from the following. Meiosis takes place in prokaryotic cells. All cells arise from other cells. Meiosis and mitosis takes place in eukaryotic cells. All cells have a cell-surface membrane.17. Choose the correct statement(s). a) Animal cells are eukaryotic cells. b) Vacuole is a fluid filled organelle. c) Lysosomes are the digesters of prokaryotic cells. d) Bacteria are living organisms. a & b only b & c only a, b & d a & d only18. Select the incorrect statement out of the following. The air is warmed to room temperature when it flows through the nose and trachea. Phagocytic white blood cells are known as macrophages. The hairs inside the nose and the mucus lining along the nasal passage helps to trap dust, pollen, sand and bacteria. Goblet cells produce mucus in the trachea and bronchi.19. Select the incorrect statement about alveoli. The walls of alveoli consist of cuboidal epithelial cells. Bloos capillaries press against the walls of alveoli. Alveolar walls contain elastic fibres. Alveoli expand fully during exercise.Time is Up!
