190 Biochemistry Amino acid used in the synthesis of purines ? AGlycine (Correct Answer)BOrnithineCAlanineDThreonine
191 Biochemistry Which of the following is an example of a reverse transcriptase? AGyraseBHelicaseCTelomerase (Correct Answer)DRNA polymerase
192 Biochemistry A child develop skin tumor with blisters on exposure to sunlight. Irregular dark spots on the skin were also found. He is very likely has defect in which of the following mechanism? AThymidine dimmers repair (Correct Answer)BBase excision repairCMismatch repairDDouble strand break repair
193 Biochemistry Following statements are true with respect to glycogen except APrinciple storage of carbohydrate in the human body is glycogenBLiver and muscle are the main sites of glycogen storageCProduced by glycogenesisDInsulin stimulates glycogenolysis (Correct Answer)
194 Biochemistry ‘hn RNA’ is associated with which of the following heamatological condition? Aa - ThalassemiaBSickle cell anaemiaCB - Thalassemia (Correct Answer)DNone
195 Biochemistry Carbamoyl phosphate synthase I is used in ? APurine synthesisBPyrimidine synthesisCUrea cycle (Correct Answer)DUronic acid pathway
196 Biochemistry A 6 year old mentally retarded male child patient presents with hepatosplenomegaly, coarse facial features, corneal clouding, large tongue, prominent forehead, joint stiffness, short stature and skeletal dysplasia. What is the enzyme deficient in this patient? AIduronate sulfataseBΞ²-GalactosidaseCΞ±-L- Iduronidase (Correct Answer)DΞ²-Glucuronidase
197 Biochemistry All are true about vitamin E except ? AAct as antioxidantBPrevent lipid peroxidation of cell membraneCWater soluble vitamin (Correct Answer)DChemically tocopheral
198 Biochemistry The following methods can be used to detect the point mutation in the beta globin gene that causes sickle cell anemia, EXCEPT: APolymerase chain reaction with allele-specific oligonucleotide hybridizationBSouthern blot analysisCDNA sequencingDNohern blot analysis (Correct Answer)