Welcome to your AQA A2 Biology 2 Choose the correct statement regarding the mineralization process of decomposition. Inorganic compounds are converted into organic compounds. Carbohydrates are converted into nitrates Saprophytic bacteria and fungi take part in the process. Nitrification process does not take place.Select the incorrect statement from the following. The atmosphere contains 60% of Nitrogen. All animals fulfill their Nitrogen requirements from other plants and animals. Soil receives Nitrogen compounds in different ways. Plants cannot obtain Nitrogen directly.Which of the following is not an advantage of decomposition? Facilitating the availability of nutrients in the soil for plant absorption. Putrid smell Removing plant and animal debris from the earth's surface. Recycling minerals which are found in limited quantities in the earth.In which form can plants obtain Nitrogen? Ammonium and nitrate ions only Nitrogen gas Ammonium ions only Nitrate ions onlyWhich of the following indicates the role of micro organisms with regard to plant growth?a) Decomposition processb) Fixation of Nitrogenc) Production of plant growth substancesd) Formation of soil aggregation All a & b a, b & c b & dSelect the correct pair of receptor and stimulus. Mechanoreceptor- gravity and sound Chemoreceptor-touch Thermoreceptor-light Pressure receptor-electrical potential differencesWhich of the following is a chemoreceptor? Taste bud Ruffini corpuscle Pacinian corpuscle ConesThe cause of eutrophication. Acid rain Global warming Fertilizers in water DeforestationThe process where protein is digested by proteolitic enzymes secreted by saprophytic fungi and bacteria. Ammonification Nitrification Proteolysis DentrificationWhich of the following is incorrect regarding insulin? Insulin can pass through cell membranes. Insulin is a signalling molecule. Insulin is secreted by the beta cells of islets of langerhans. Insulin is a protein.Where are the GLUT proteins found in cells? Mitochondria Nucleus Cytoplasm Plasma membraneSelect the incorrect statement regarding receptors. They are always connected to nerves. They are designed to receive specif stimuli. They do not act as transducers. They consist of special types of cells such as rods and cones.Which of the following does not occur during the symbiotic fixation of atmospheric nitrogen fixation?a) Plants absorb ammonium ions.b) Plants synthesize nitrogenous compounds such as amino acids and proteins.c) Soil receives nitric acid by rain water.d) Clostridium converts nitrogen gas into ammonium ions. c & d only b & d only a & c only a & d onlyLack of rhodopsin could cause the following condition. Long sight Night blindness Colour blindness Short sightAn example of a thermoreceptor. Merkel nerve endings Meissner's corpuscle Ruffini corpuscle Pacinian corpuscleThe interaction between two or more genes to control a single phenotype. Independant assortment Epistasis Autosomal linkage Sex linked inheritanceType1 diabetes is sometimes called _________. Hematuria Juvenile-onset diabetes Adult-onset diabetes Diabetes insipidusWhich of the following is not a method of soil obtaining Nitrogen compounds? Artificial fertilizers Eutrophication Nitric acid formed due to lightening Biological assimilationPhotoreceptive cells associated with monochromatic vision. Monocyte Cone cells Rod cells OsteoclastWithin a population of rabbits, the colour black (B) is dominant over the colour white (b). And, 30% of all rabbits are white. What is the percentage of heterozygous rabbits in the population? 42% 50% 36% 46%
