51. THE ONLY INTERMEDIATE IN THE CITRIC ACID CYCLE WHICH HAVE FIVE CARBON? A. OXALOACETATE  B. ALPHA-KETOGLUTARATE C. SUCCINATE D. ISOCITRATE 52. THE RATE AT WHICH CITRIC ACID CYCLE OPERATES IS/ARE CONTROLLED BY WHICH OF THE FOLLOWING? A. ATP & NADH LEVELS B. FADH2 & NADH LEVELS  C. AMP & ATP LEVELS  D. ATP & GTP LEVELS 53. CITRIC ACID CYCLEOR THE KREB'S CYCLE IS WHAT TYPE OF METABOLIC PATHWAY?

Q: The first reaction in glycolysis that results in the formation of an energy-rich compound (i.e., a…

A: The cytoplasmic metabolic process that turns glucose into pyruvic acid is known as glycolysis. The…

Q: 4. Which of the following statements about the citric acid cycle is INCORRECT? A. It is a cyclic…

A: Metabolic pathways are a series of process which includes chemical reactions occurring in a cell.…

Q: The steps of glycolysis between glyceraldehyde 3-phosphate and 3-phosphoglycerate involve all of the…

A: Glycolysis is a catabolic pathway where glucose is broken down into pyruvate molecules that enter…

Q: Select the INCORRECT statement about Glutamate dehydrogenase : a. Catalyzes the removal of NH4+…

A: Enzymes are involved in increasing the rate of a biological reaction by lowering the activation…

Q: Which pathway/s does NOT involve HMG-CoA? a. cholesterol synthesis b. lipogenesis c. ketogenesis d.…

A: cholesterol synthesis takes place through mevalonate pathway in which conversion of HMG coA to…

Q: An unknown carbohydrate solution tested (+) with Molisch’s reagent. It formed a red precipitate…

A: Carbohydrates are the compounds which are polyhydroxy aldehydes or polyhydroxy ketones or their…

Q: A glycolytic substrate which is the precursor of the pentose phosphate pathway. 2. How many pyruvate…

A: 1. Glucose 6 phosphate is the precursor of pentose phosphate pathway. 2. When the one glucose…

Q: The carbon skeletons of many amino acids can be used to replenish the intermediates of the citric…

A: Since you have posted multiple MCQ questions, we will provide the solution only to the first three…

Q: Complex allosteric regulation of the aspartate transcarbamoylase reaction is significant because it…

A: Aspartate transcarbomylase (ATCase) catalyzes the first step in pyrimidine biosynthesis. Aspartate…

Q: 1. Consider the enzyme pyruvate carboxylase. a. What pathway(s) does this enzyme function in? b.…

A: “Since you have posted a question with multiple sub-parts, we will solve the first four sub-parts…

Q: To enter the citric acid cycle, glucose must be transformed into: A. pyruvic acid B. acetyl-CoA C.…

A: All aerobic species use the citric acid cycle, also known as the TCA cycle or the Krebs cycle, to…

Q: Conversion of pyruvate to PEP (phosphoenolpyruvate) requires the action of a. A. B. C. D.…

A: The respiration mechanism that occurs in a biological cell is cellular respiration. Two molecules of…

Q: How many NET molecules of ATP are produced during the Embden-Meyerhof pathway of glycolysis for…

A: Cellular respiration is the process how biochemical energy is generated from food. It involves the…

Q: The conversion of pyruvate to acetyl-CoA is catalyzed by enzyme pyruvate dehydrogenase. In this…

A: Pyruvate to Acetyl coA conversation is a bridge between Glycolysis an Crebs cycle. Acetyl coA reacts…

Q: Using your own diagram, illustrate the reactions that take place within the pyruvate dehydrogenase…

A: Hi! As you have posted multiple questions, I will be answering the first question for you. If you…

Q: 2. Name two shuttle systems that transport NADH from cytoplasm into a mitochondrion.

A: Question no.2: The shuttle system is malate-aspartate shuttle.

Q: Match the features of metabolic pathways in Column A with the most appropriate statement in Column…

A: Metabolism is the total of all chemical transformation that takes place in a living cell. One…

Q: Which of the following reactions is  reversible and irreversible? Why?  a. Pyruvate +…

A: Since you have posted a question with multiple sub-parts, we will solve the first three sub-parts…

Q: Which of the following activate glycogen synthesis? A. Phosphorylation of glycogen synthase kinase…

A: Hepatocyte glucokinase is inhibited through a specific inhibitory protein, GRP and GRP is a nuclear…

Q: A major pathway for metabolism of ethanol is shown below. Humans consuming a large fraction of their…

A: Glycolysis is enzymatic conversion of glucose to pyruvate with concomitant reduction of NAD to NADH…

Q: Calculate the energy produced (in ATP molecules) achieved by complete oxidation of the hydrolysis…

A: Glycolysis is an oxidative process that is common in both aerobic and anaerobic cellular…

Q: The initial step of the citric acid cycle is a. Conversion of pyruvate to acetyl-CoA b. Formation of…

A: Citric acid or Kreb's cycle or TCA cycle is the second step of aerobic respiration that takes place…

Q: If the enzyme that catalyzed the reaction that converts pyruvate to acetyl-CoA and carbon dioxide is…

A: The cellular respiration involves in the breakdown of glucose and production of energy in the form…

Q: Concerning the process of the aerobic fate of glucose oxidation, which of the following statements…

A: In the cytosol, 1 molecule of glucose is converted into 2 molecules of pyruvate via glycolysis.…

Q: 2a) Which of the following statements about pyruvate oxidation IS TRUE?  a. NADH is oxidized in the…

A: The answer to the above questions are given below -

Q: what way are the transition step (oxidation of pyruvate) and step 4 of the citric acid cycle…

A: A is incorrect Reason : Both are irreversible reactions and cannot be reversibly activated.

Q: CO- COO Succinate dehydrogenase CH2 + FAD CH2 C-H + FADH2 H-C COO COO- Succinate Fumarate 17. This…

A: Krebs cycle (also known as the citric acid cycle or tricarboxylic acid cycle) was discovered by H.…

Q: 1. Anaerobic glycolysis of which of these produces 3 ATPS per unit glucose consumed? a. Amino acid…

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Q: ATP levels are high in the liver, NADPH levels are low, but fat biosynthesis needs to happen. What…

A: The pentose phosphate pathway is also known as the hexose-mono-phosphate shunt pathway. It occurs in…

Q: 6. Succinate dehydrogenase couples the activity of the citric acid cycle with that of the electron…

A: Succinate dehydrogenase is an enzyme located in the inner mitochondrial membrane. It has FAD as its…

Q: 1. Make a whole diagram about protein metabolism. (Illustrate on where do all the products directly…

A: Proteins are required in body for various purpose. It will never be considered as false statement…

Q: What do you think would be the effect on oxidative phosphorylation of the following mutations of F1…

A: F1 or F0 ATPase synthase is C ring structured enzyme which transfer the hydrogen ions by rotation by…

Q: 1. If glucose was no longer available, lactic acid fermentation activity would:   a.…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Which of the following statements about FAD is FALSE?   a. More ATP is produced from the…

A:

Q: Which of the following coenzymes does not get restored to it's original form within the PDH complex…

A: PDH (pyruvate dehydrogenase complex) is an enzyme complex, which is composed of three enzymes known…

Q: A key enzyme of the Citric Acid Cycle is isocitrate dehydrogenase.  It catalyzes the conversion of…

A: Isocitrate dehydrogenase catalyzes the conversion of isocitrate to alpha-ketoglutarate and it is one…

Q: Which of the following is true concerning the function of lipoic acid in pyruvate metabolism? a.…

A: The anaerobic metabolism of glucose in glycolysis forms pyruvate. Gluconeogenesis is the process by…

Q: 1. Select the correct answer to fill in the blank. If glucose was no longer available, pyruvate…

A: Cell is the smallest structural and, functional unit of life. It is simple machinery that houses all…

Q: For each of the products, identify the phase of aerobic respiration where these molecules will enter…

A: ATP  Adenosine triphosphate or ATP a chemical compound which is use by living organisms as a energy…

Q: 1. Give the importance of the following: а. АТР b. NADP c. Flavin Co-enzyme d. Pentose Phosphate…

A: Note: Since we only answer one question at a time, we’ll answer the first. Please resubmit the…

Q: Complex No.3 named: Select one: O a. succinate dehydrogenase O b. NADH dehydrogenases Oc. Cytochrome…

A: A complex is a structure made up of a central atom, molecule, or protein that is loosely coupled to…

Metabolic pathways

Metabolism is defined as the group of life-supporting, enzyme-mediated chemical reactions in organisms. A metabolic pathway is a set of these chemical reactions that involve anabolism (synthesis of complex biomolecules) and catabolism (breakdown of biomolecules into small molecules) that occur inside a cell. Metabolites are the reacting substances, products, and intermediate substances of an enzymatic process that are altered by a series of chemical events catalyzed by enzymes.