Welcome to your OCR AS Biology 2 1. 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. None a, b, c a, b, d a & d only2. What is the respiratory organ of a fish? Skin Book lungs Lungs Gills 3. How does gas exchange take place within alveoli? Cutaneous respiration Diffusion Osmosis Active transport4. Select the incorrect statement out of the following. The air is warmed to room temperature when it flows through the nose and trachea. Goblet cells produce mucus in the trachea and bronchi. 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.5. Which of the following is found in plant cells but not in bacteria? RNA Mitochondria Cell membrane Ribosomes6. Select the incorrect statement from the following. Meiosis and mitosis takes place in eukaryotic cells. All cells have a cell-surface membrane. All cells arise from other cells. Meiosis takes place in prokaryotic cells.7. Select the incorrect sentence out of the following. Magnification and resolution are not dependant on each other. A high magnification does not always guarantee a high resolution. 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.8. The lungs are in the _________ surrounded by the ___________ which enclose an airtight space. Bronchus, pleural membranes Thoracic cavity, pleural membranes Pleural membranes, thoracic cavity Trachea, bronchus9. 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? x10 x1000 x10000 x10010. Which of the following is not correctly paired? Nucleus-cellular reproduction Rough endoplasmic reticulum-protein synthesis Smooth endoplasmic reticulum-processing, packaging, secretion Chloroplast-photosynthesis11. Select the incorrect statement from the following. Many cancer treatments are directed at controlling the rate of cell division. Uncontrolled cell division can lead to the formation of tumours and of cancers. Reproduction in prokaryotic cells happen through meiosis or mitosis. Mitosis is a controlled process.12. How do some varieties of rice respond to flooding? By growing tall. By dropping leaves. By growing horizontally. By getting submerged in water.13. 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 & d only a, b & d b & c only a & b only14. The gas exchange surface in a human being. Trachea Bronchioles Diaphragm Alveoli15. Select the incorrect statement about alveoli. The walls of alveoli consist of cuboidal epithelial cells. Alveoli expand fully during exercise. Alveolar walls contain elastic fibres. Bloos capillaries press against the walls of alveoli.16. 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? 0.2 0.002 0.02 217. The accepted theory of how eukaryotic cells evolved from prokaryotic cells. Endosymbiont theory Fermentation theory Darwinism Cell theory18. A similarity between transmission electron microscope and scanning electron microscope. Both produce a 3D visual image. Both are used to observe dead organisms. Both can be used to view the insides of each organelle. Both can attain the same amount of magnification.19. The protective protein coat in a virus. Fibres Capsid Tail Membrane envelope
