🧬 Biochemistry Solved MCQs with Answers

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

1490 solved MCQs

Animals cannot convert fatty acids into glucose becauseAnswer: Acetyl CoA can not be converted to pyruvate In eukaryotes fatty acid breakdown occurs inAnswer: Mitochondrial matrix What is the major protein constituent of high-density lipoprotein (HDL)?Answer: Apolipoprotein A-l Phospholipid containsAnswer: Hydrophilic heads and hydrophobic tails Micelles of fatty acids in water are organized such that the __________ faces the solvent and the __________ are directed toward the interiorAnswer: Both (c) and (b) Cholesterolemia meansAnswer: Lack of functional LDL receptors Fatty acids break down of eukaryotes occurs inAnswer: Mitochondrial matrix VLDLs are synthesized inAnswer: Liver Chylomicrons are synthesized inAnswer: Intestine How many types of lipoproteins are there?Answer: 5 Fatty acid synthesis takes place inAnswer: Cytosol Cholestrol is the precursor ofAnswer: Both (a) and (c) Atherosclerosis can cause bloodAnswer: Clotting Palmitate has 16 carbon atoms withAnswer: None of these How many ATPs are formed during complete oxidation of palmitate?Answer: 129 The lowest energy value lipid for human nutrition isAnswer: Olestra How many classes of steroid hormones are there?Answer: 5 The number of water molecules consumed by the formation of phosphatidyl serine areAnswer: 0 Synthesis of fatty acid takes place whenAnswer: Carbohydrate and energy are plentiful Which of the following is called milk ejection hormone?Answer: Oxytocin Glycolytic pathway regulation involvesAnswer: All of the above During catabolism, only about 40% of the energy available from oxidizing glucose is used to synthesize ATP. Remaining 60%Answer: Is lost as heat Why does the glycolytic pathway continue in the direction of glucose catabolism?Answer: There are essentially three irreversible reactions that act as the driving force for the pathway The released energy obtained by oxidation of glucose is stored asAnswer: ATP A kinase is an enzyme thatAnswer: Uses ATP to add a phosphate group to the substrate For every one molecule of sugar glucose which is oxidized __________ molecule of pyruvic acid are produced.Answer: 2 In the glycogen synthase reaction, the precursor to glycogen isAnswer: UDP-glucose The active form of glycogen phosphorylase is phosphorylated, while the dephosphorylation of which active form occurs?Answer: Glycogen synthase The amount of energy received from one ATP isAnswer: 7.3 kcal The enzymes of glycolysis in a eukaryotic cell are located in theAnswer: Cytosol