🧬 Biochemistry Solved MCQs with Answers

Practice 1490 approved 🧬 Biochemistry questions with verified answers from the 🧬 Medical Science subject for Pakistan exams.

1490 solved MCQs

Saliva contains all of the following exceptAnswer: Hormones The conversion of pyruvate to oxaloacetateAnswer: Requires biotin Gluconeogenesis is theAnswer: Synthesis of glucose from non-carbohydrate precursors Hydrolysis of lactose yieldsAnswer: Galactose and glucose Two major products of pentose phosphate pathway areAnswer: Nicotinamide adenine dinucleotide and ribose 5-phosphate A catabolic intermediate which stimulates phosphofructokinase would stimulateAnswer: Glycolysis Pyruvate is initially converted to which of the following in the gluconeogenesis?Answer: Oxaloacetate Boat and chair conformations are foundAnswer: In pyranose sugars The conversion of pyruvate to lactate is catalysed byAnswer: Lactate dehydrogenase Which of the following can act as precursors for gluconeogenesis?Answer: All of the above a-amylose is similar toAnswer: α-helices Storage polysaccharide made by animals isAnswer: Glycogen The glycosidic bondAnswer: Both (b) and (c) The sugar which forms major component of nucleic acids isAnswer: Ribose Under aerobic condition pyruvate is converted by pyruvate dehydrogenase toAnswer: Acetyl CoA Which of the following is not a disaccharide?Answer: Amylose Hexokinase activity in glycolysis is inhibited byAnswer: Glucose 6- phosphate The ultimate source of energy that sustains living systems isAnswer: Sunlight Citric acid accumulation wouldAnswer: Both (b) and (c) Which of the following is not involved in the biosynthesis of DNA?Answer: Carbonic anhydrase Which of the following would be considered a part of metabolism?Answer: All of the above InsulinAnswer: inhibits gluconeogenesis and stimulates glycolysis What is present in the stomach to prevent self-digestion?Answer: Mucus The viruses that can achieve neoplastic transformation are calledAnswer: DNA tumor viruses Which of these restriction enzymes produce blunt ends?Answer: EcoRV The RP13 gene of chromosome 17 codes for a protein __________ .Answer: Involved in eye development Isoschizomers recognizeAnswer: Same recognition site and recognition sequence Restriction enzymes are named forAnswer: The bacterium they are derived from Which of these genes codes for a protein that plays a role in white blood cell function?Answer: MPO When populations are small, gene frequencies can change from generation to generation and some alleles may become fixed in a population. This is called __________ .Answer: Genetic drift