UM1010: Integrated Science and Clinical Medicine 1 Metabolism Quiz
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Questions and Answers

What is the main focus of Part 2 of the lecture on metabolism?

  • Crystal structures
  • Pyruvate oxidation (correct)
  • Glycogen synthesis
  • Lipid transport
  • Anabolic metabolism is characterized by:

  • Breaking down complex molecules into simpler ones
  • Building complex molecules from simpler ones (correct)
  • Carbohydrate catabolism
  • Energy release and catabolic reactions
  • Which of the following is NOT a type of lipid mentioned in the lesson plan?

  • Phospholipids
  • Monosaccharides (correct)
  • Triglycerides
  • Steroids
  • What is the importance of fats as an energy reserve?

    <p>Providing long-term energy storage</p> Signup and view all the answers

    What process is covered in Part 4 of the lecture on metabolism?

    <p>Electron transport chain</p> Signup and view all the answers

    Which best describes the difference between monosaccharide and polysaccharide?

    <p>Complexity of structure</p> Signup and view all the answers

    What is the immediate product of the conversion of fructose-6-phosphate to fructose-1,6-bisphosphate?

    <p>Glyceraldehyde-3-phosphate</p> Signup and view all the answers

    Which enzyme is responsible for the conversion of 1,3-bisphosphate to 3-phosphoglycerate in glycolysis?

    <p>Phosphoglycerate mutase</p> Signup and view all the answers

    What is the final product of glycolysis?

    <p>Pyruvate</p> Signup and view all the answers

    During glycolysis, what molecule acts as a coenzyme that accepts electrons and becomes reduced?

    <p>NAD+</p> Signup and view all the answers

    Which step in glycolysis involves the conversion of dihydroxyacetone phosphate to glyceraldehyde-3-phosphate?

    <p>Step 5</p> Signup and view all the answers

    What is the net gain of ATP molecules produced per glucose molecule in glycolysis?

    <p>$2$</p> Signup and view all the answers

    Which type of fatty acid has all carbons in the tail saturated with hydrogen atoms?

    <p>Saturated fatty acid</p> Signup and view all the answers

    Which fatty acid contains some C=C bonds and is an example of a monounsaturated fatty acid found in animal fat?

    <p>Oleic acid</p> Signup and view all the answers

    Why must not all polyunsaturated fatty acids be biosynthesized in humans?

    <p>They must be part of the diet</p> Signup and view all the answers

    Which component is one of the major components of dietary fat?

    <p>Triacylglycerol</p> Signup and view all the answers

    How are short-chain fatty acids absorbed into the bloodstream?

    <p>Directly into the blood stream from gut epithelial cells</p> Signup and view all the answers

    Where are longer chain fatty acids and monoglycerides converted back to triacylglycerol for transportation?

    <p>ER of gut epithelial cells</p> Signup and view all the answers

    Which molecules can feed into the citric acid cycle?

    <p>Carbohydrates, fats, and proteins</p> Signup and view all the answers

    What is a common point where various metabolic pathways converge?

    <p>Acetyl CoA</p> Signup and view all the answers

    How is acetyl CoA generated from proteins?

    <p>Through breakdown into amino acids and subsequent metabolism</p> Signup and view all the answers

    Which of the following are NOT mentioned as major metabolic intermediates derived from amino acids?

    <p>Lactate</p> Signup and view all the answers

    Where are amino acids transported after being broken down from proteins?

    <p>Other tissues through the blood</p> Signup and view all the answers

    What happens to the carbon skeletons of amino acids in relation to the citric acid cycle?

    <p>They are metabolized to seven major metabolic intermediates</p> Signup and view all the answers

    Which lipoprotein has the highest percentage of cholesterol/CE?

    <p>LDL</p> Signup and view all the answers

    What is the primary function of LDL in lipid transport?

    <p>Transport of cholesterol to tissues</p> Signup and view all the answers

    What is required as an absolute co-enzyme during the carboxylation step in the β-oxidation of fatty acids with an odd number of carbons?

    <p>Biotin</p> Signup and view all the answers

    What is the direct product of β-oxidation in the mitochondrial matrix?

    <p>Acetyl CoA</p> Signup and view all the answers

    Which step involves the synthesis of succinyl CoA in the β-oxidation of odd-numbered fatty acids?

    <p>Carboxylation</p> Signup and view all the answers

    What compound directly enters the citric acid cycle from the β-oxidation of odd-numbered fatty acids?

    <p>Succinyl CoA</p> Signup and view all the answers

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