Description : A component of the respiratory chain in mitochondria is (A) Coenzyme Q (B) Coenzyme A (C) Acetyl coenzyme (D) Coenzyme containing thiamin
Last Answer : Answer : A
Description : Q. What are the important metabolic events taking place in mitochondria?
Last Answer : A. TCA cycle, electron transport chain, beta oxidation of fatty acids and urea cycle
Description : Q. What is the function of lysosomes?
Last Answer : A. They are bags of hydrolytic enzymes that bring about degradation of macromolecules
Description : A polycistronic mRNA can be seen in (A) Prokaryotes (B) Eukaryotes (C) Mitochondria (D) All of these
Description : Mammalian DNA polymerase γ is located in (A) Nucleus (B) Nucleolus (C) Mitochondria (D) Cytosol
Last Answer : Answer : C
Description : Some DNA is present in mitochondria of (A) Prokaryotes (B) Eukaryotes (C) Both (A) and (B) (D) None of these
Last Answer : Answer : B
Description : De novo synthesis of pyrimidine nucleotides occurs in (A) Mitochondria (B) Cytosol (C) Microsomes (D) Ribosomes
Description : De novo synthesis of purine nucleotide occurs in (A) Mitochondria (B) Cytosol (C) Microsmes (D) Ribosomes
Description : Extranuclear DNA is present in (A) Ribosomes (B) Endoplasmic reticulum (C) Lysosomes (D) Mitochondria
Last Answer : Answer : D
Description : During synthesis of porphyrins, synthesis of δ-amino levulinic acid occurs in (A) Mitochondria (B) Cytosol (C) Both in mitochondria and cytosol (D) Ribosomes
Description : Porphyrins are synthesized in (A) Cytosol (B) Mitochondria (C) Cytosol and mitochondria (D) Rough endoplasmic reticulum
Description : The coupling of oxidation and phosphorylation in intact mitochondria: (A) Puromycin (B) Oligomycin (C) Streptomycin (D) Gentamycin
Description : The biosynthesis of urea occurs mainly in the liver: (A) Cytosol (B) Mitochondria (C) Microsomes (D) Nuclei
Description : The enzymes present in the membrane of mitochondria are (A) Flavoproteins and cytochromes (B) Fumarase and lipase (C) Enolase and catalase (D) Hexokinase and zymase
Description : Enzymes functional in cell or mitochondria are (A) Endoenzymes (B) Exoenzymes (C) Apoenzymes (D) Holoenzymes
Description : The major site for elongation of medium chain fatty acids is (A) Mitochondria (B) Cytosol (C) Microsomes (D) All of these
Description : Glycolytic pathway is located in (A) Mitochondria (B) Cytosol (C) Microsomes (D) Nucleus
Description : Pyruvate dehydrogenase complex is located in (A) Cytosol (B) Lysosomes (C) Mitochondria (D) Endoplasmic reticulum
Description : Lactate dehydrogenase is located in (A) Lysosomes (B) Mitochondria (C) Cytosol (D) Microsomes
Description : All the enzymes involved in the synthesis of cholesterol are found in (A) Mitochondria (B) Golgi apparatus (C) Nucleus (D) Endoplasmic reticulum and cytosol
Description : Brown adipose tissue is (A) A prominent tissue in human (B) Characterised by high content of mitochondria (C) Associated with high activity of ATP synthase (D) Characterised by low content of cytochromes
Description : The amino alcohol sphingosine is synthesized in (A) Mitochondria (B) Cytosol (C) Nucleus (D) Endoplasmic reticulum
Description : Acetyl-CoA is the principal building block of fatty acids. It is produced within the mitochondria and does not diffuse readily into cytosol. The availability of acetyl CoA involves (A) Carnitine acyl transferase (B) Pyruvate dehydrogenase (C) Citrate lyase (D) Thiolase
Description : The main pathway for denovo synthesis of fatty acids occur in (A) Cytosol (B) Mitochondria (C) Microsomes (D) Nucleus
Description : Ketone bodies serve as a fuel for (A) Extrahepatic tissues (B) Hepatic tissues (C) Erythrocytes (D) Mitochondria
Description : The synthesis of 3-hydroxy-3-methylglutaryl-CoA can occur (A) Only in mitochondria of all mammalian tissues (B) Only in the cytosol of all mammalian tissue (C) In both cytosol and mitochondria (D) In lysosomes
Description : Enzymes responsible for ketone body formation are associated mainly with the (A) Mitochondria (B) Endoplasmic reticulum (C) Nucleus (D) Golgi apparatus
Description : The enzyme pyruvate carboxylase is present in (A) Cytosol (B) Mitochondria (C) Nucleus (D) Golgi bodies
Description : The enzymes of the pentose phosphate pathway are found in the (A) Cytosol (B) Mitochondria (C) Nucleus (D) Endoplasmic reticulum
Description : An enzyme of the citric acid cycle also found outside the mitochondria is (A) Isocitrate dehydrogenase (B) Citrate synthetase (C) α-Ketoglutarate dehydrogenase (D) Malate dehydrogenase
Description : All the enzymes of glycolysis pathway are found in (A) Extramitochondrial soluble fraction of the cell (B) Mitochondria (C) Nucleus (D) Endoplasmic reticulum
Description : Vitamin A over dosage causes injury to (A) Mitochondria (B) Microtubules (C) Lysosomes (D) E.R
Description : Vitamin E stored in (A) Mitochondria (B) Microsomes (C) Both (A) and (B) (D) None of these
Description : Acyl carrier protein is involved in the synthesis of (A) protein (B) glycogen (C) fatty acid outside the mitochondria (D) fatty acid in the mitochondria
Description : What is the sub cellular site for the βoxidation of fatty acids? (A) Nucleus (B) Mitochondria (C) Lysosome (D) Cytosol
Description : While citrate is converted to isocitrate in the mitochondria, it is converted to _______ in the cytosol. (A) Acetyl CoA + oxaloacetate (B) Acetyl CoA + malonyl CoA (C) Acetyl CoA + Pyruvate (D) Acetyl CoA + acetoacetyl CoA
Description : Long chain acyl CoA penetrates mitochondria in the presence of (A) Palmitate (B) Carnitine (C) Sorbitol (D) DNP
Description : De novo synthesis and oxidation of fatty acids differ in the following respect: (A) Synthesis occurs in cytosol and oxidation in mitochondria (B) Synthesis is decreased and oxidation increased by ... synthesis and FAD in oxidation (D) Malonyl CoA is formed during oxidation but not during synthesis
Description : Carnitine is required for the transport of (A) Triglycerides out of liver (B) Triglycerides into mitochondria (C) Short chain fatty acids into mitochondria (D) Long chain fatty acids into mitochondria
Description : Oxidation of fatty acids occurs (A) In the cytosol (B) In the matrix of mitochondria (C) On inner mitochondrial membrane (D) On the microsomes
Description : All the following statements about carnitine are true except (A) It can be synthesised in the human body (B) It can be synthesized from methionine and lysine (C) It is required for transport of short chain fatty acids into mitochondria (D) Its deficiency can occur due to haemodialysis
Description : De hovo synthesis of fatty acids occurs in (A) Cytosol (B) Mitochondria (C) Microsomes (D) All of these
Description : The enzymes of β-oxidation are found in (A) Mitochondria (B) Cytosol (C) Golgi apparatus (D) Nucleus
Description : Long chain fatty acids are first activated to acetyl-CoA in (A) Cytosol (B) Microsomes (C) Nucleus (D) Mitochondria
Description : The biosynthesis of Urea occurs mainly in the Liver: (A) Cytosol (B) Microsomes (C) Nucleus (D) Mitochondria
Description : Carbamoyl phosphate required for urea synthesis is formed in (A) Cytosol (B) Mitochondria (C) Both (A) and (B) (D) None of these
Description : The enzymes of urea synthesis are found in (A) Mitochondria only (B) Cytosol only (C) Both mitochondria and cytosol (D) Nucleus
Description : The power house of the cell is (A) Nucleus (B) Cell membrane (C) Mitochondria (D) Lysosomes
Last Answer : C
Description : The fatty acids can be transported into and out of mitochondria through (A) Active transport (B) Facilitated transfer (C) Non-facilitated transfer (D) None of these
Last Answer : B
Description : Which of the following is located in the mitochondria? (A) Cytochrome oxidase (B) Succinate dehydrogenase (C) Dihydrolipoyl dehydrogenase (C) All of these
Last Answer : D