UHS MDCAT 2017 Paper MDCAT 2017 PAPER ( PART 5 ) 1. DNA segements of different lengths can be separated by a process of: Autoradiography Gel electrophoresis Northern blotting Western blotting 2. What is the first heat stable component used in PCR: Taq-polymerase Taq-helicase Taq-isomerase Taq SSBp 3. Patients of cystic fibrosis (CF) produce thick mucusbecause of faulty: Trans-membrane carrier Mucus membrane Na+ ions Cl- ions 4. Chemicals used for destroying agricultural competitors are known as: Chemotherapeutic agents Pesticides Antibiotics Disinfectants 5. How denitrification does occur in soil Leaching of nitrate ions Drainage of manure from fields Active uptake of Nitrate ions by plant roots Bacterial reduction of NO3- ions to N2 gas 6. Process by which unrelated species evolve to functionally resemble each other is called: Convergent evolution Co-evolution Parallel evolution Divergent evolution 7. W.O.F shows evidences from evolution through molecular biology: Development of bronchial arches in vertebrate embryo Distribution of species Study of vestigial organs Comparision of genes and proteins in different species 8. Large population size, random mating, no mutation and no emigration or immigration are the postulates of: Hardy- Weinberg theorem Mendel’s law of segregation Theory presented by Schleien and Schwann Mendel’s law of independent assortment 9. Pure breeding lines of pea were taken regarding seed shape- Round and wrinkled and were crossed with no intermediate between parents. All offsprings were found to be round. These results show: Incomplete dominance Over dominance relationship Dominance – recessive relationship Co- dominance 10. Base substitution, deletion and insertion are examples of: Point mutation Aneuploidy Euploidy Chromosomal aberration Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11
assalamualaikum sir this website is amaizng….for MDCAT students Butt there is an issue with key kindly recheck it as in part 7 mcq no 8 is marked wrong ………….protien molecules mostly made os 20 types of amino acids rather than 25