Welcome to your AQA A2 Biology 2 Which of the following is incorrect regarding insulin? Insulin is a protein. Insulin can pass through cell membranes. Insulin is secreted by the beta cells of islets of langerhans. Insulin is a signalling molecule.Which of the following is not an advantage of decomposition? Facilitating the availability of nutrients in the soil for plant absorption. Putrid smell Recycling minerals which are found in limited quantities in the earth. Removing plant and animal debris from the earth's surface.The cause of eutrophication. Fertilizers in water Global warming Deforestation Acid rainSelect the incorrect statement from the following. Plants cannot obtain Nitrogen directly. The atmosphere contains 60% of Nitrogen. Soil receives Nitrogen compounds in different ways. All animals fulfill their Nitrogen requirements from other plants and animals.Type1 diabetes is sometimes called _________. Hematuria Diabetes insipidus Juvenile-onset diabetes Adult-onset diabetesWhich of the following is not a method of soil obtaining Nitrogen compounds? Biological assimilation Eutrophication Nitric acid formed due to lightening Artificial fertilizersWhich of the following is a chemoreceptor? Ruffini corpuscle Pacinian corpuscle Cones Taste budWithin 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? 46% 50% 36% 42%In which form can plants obtain Nitrogen? Nitrogen gas Nitrate ions only Ammonium ions only Ammonium and 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 b & d a, b & cChoose the correct statement regarding the mineralization process of decomposition. Nitrification process does not take place. Saprophytic bacteria and fungi take part in the process. Inorganic compounds are converted into organic compounds. Carbohydrates are converted into nitratesSelect the incorrect statement regarding receptors. They are always connected to nerves. They do not act as transducers. They are designed to receive specif stimuli. They consist of special types of cells such as rods and cones.The interaction between two or more genes to control a single phenotype. Epistasis Autosomal linkage Sex linked inheritance Independant assortmentThe process where protein is digested by proteolitic enzymes secreted by saprophytic fungi and bacteria. Ammonification Dentrification Proteolysis NitrificationWhere are the GLUT proteins found in cells? Mitochondria Cytoplasm Nucleus Plasma membraneSelect the correct pair of receptor and stimulus. Pressure receptor-electrical potential differences Chemoreceptor-touch Thermoreceptor-light Mechanoreceptor- gravity and soundAn example of a thermoreceptor. Merkel nerve endings Meissner's corpuscle Pacinian corpuscle Ruffini corpuscleLack of rhodopsin could cause the following condition. Colour blindness Night blindness Long sight Short sightWhich 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. a & c only c & d only a & d only b & d onlyPhotoreceptive cells associated with monochromatic vision. Rod cells Cone cells Osteoclast MonocyteTime is Up!