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Home⇒ Medical Science⇒ Biochemistry⇒ Tca cycle
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q1 ⇒ Why is the TCA cycle the central pathway of metabolism of the cell? Its intermediates are commonly used by other metabolic reactions [other wrong options] [Discuss in forum] ![]() ![]() It occurs in the center of the cell All other metabolic pathways depend upon it None of the above |
Q2 ⇒ Most multi-cellular organisms obtain energy for the synthesis of ATP during oxidative phosphorylation from a proton gradient across the inner mitochondrial membrane [other wrong options] [Discuss in forum] ![]() ![]() high energy phosphate compounds a proton gradient across the cell membrane a proton gradient across the outer mitochondrial membrane |
Q3 ⇒ Cholesterol can be synthesized de novo in liver [other wrong options] [Discuss in forum] ![]() ![]() pancreas intestine cell membrane |
Q4 ⇒ The enzymes of the TCA cycle in a eukaryotic cell are located in the mitochondria [other wrong options] [Discuss in forum] ![]() ![]() nucleus plasma membrane lysosomal bodies |
Q5 ⇒ Which of the following enzyme does not take part in the TCA cycle? Pyruvate dehydrogenase [other wrong options] [Discuss in forum] ![]() ![]() Citrate synthase Iso-citrate dehydrogenase Malate dehydrogenase |
Q6 ⇒ During cellular respiration, most of the ATP made, is generated by oxidative phosphorylation [other wrong options] [Discuss in forum] ![]() ![]() photophosphorylation glycolysis substrate-level phosphorylation |
Q7 ⇒ The end product of glycolysis is pyruvate, which enters the citric acid cycle after being converted to acetyl-CoA [other wrong options] [Discuss in forum] ![]() ![]() acetic acid acetaldehyde none of these |
Q8 ⇒ The FADH2 and NADH produced by the oxidation of one acetyl-CoA results in the synthesis of about- 11 ATPs [other wrong options] [Discuss in forum] ![]() ![]() 3 ATPs 6 ATPs 15 ATPs |
Q9 ⇒ Malate-asparatate shuttle operates in heart and liver [other wrong options] [Discuss in forum] ![]() ![]() lungs and liver pancreas and liver none of these |
Q10 ⇒ Most of the enzymes of the citric acid cycle in a eukaryotic cell are located in the mitochondrial matrix [other wrong options] [Discuss in forum] ![]() ![]() inner mitochondrial membrane cytosol intermembrane space |
Q11 ⇒ Which one is not the main protein in electron transport chain? Citrate synthease [other wrong options] [Discuss in forum] ![]() ![]() NADH dehydrogenase Cytochrome bc1 complex Cytochrome oxidase |
Q12 ⇒ How many molecules of ATPs are synthesized per NADH oxidation? 3 [other wrong options] [Discuss in forum] ![]() ![]() 2 1 4 |
Q13 ⇒ Citric acid cycle occurs in mitochondria [other wrong options] [Discuss in forum] ![]() ![]() cytoplasm endoplasmic reticulum golgi bodies |
Q14 ⇒ The first intermediate in TCA cycle is citrate [other wrong options] [Discuss in forum] ![]() ![]() succinate fumerate malate |
Q15 ⇒ Oxidation of a molecule involves loss of electron [other wrong options] [Discuss in forum] ![]() ![]() gain of electron gain of proton loss of proton |
Q16 ⇒ A positive redox potential means substance has higher affinity for electron [other wrong options] [Discuss in forum] ![]() ![]() lower affinity for electron lower affinity for proton higher affinity for proton |
Q17 ⇒ How many ATPs are produced during citric acid cycle? 12 [other wrong options] [Discuss in forum] ![]() ![]() 10 13 8 |
Q18 ⇒ To stop ATP synthesis which chemical is generally used? 2,4 dinitrophenol [other wrong options] [Discuss in forum] ![]() ![]() DNSA DDT None of the chemical can stop ATP synthesis |
Q19 ⇒ Which of the following is involved in energy production? All of the above [other wrong options] [Discuss in forum] ![]() ![]() Generation of proton gradients across membranes Transport of electrons on organic molecules Conversion of compounds with high energy to those of low energy |
Q20 ⇒ The catabolism of sugars and fatty acids is similar because both of these compounds are funnelled through the TC A/citric acid cycle [other wrong options] [Discuss in forum] ![]() ![]() both of these compounds generate redox energy during catabolism both of these compounds generate chemical energy during catabolism all of the above |
Or |