The breakdown of pyruvate to give carbon dioxide water and energy takes place in

The name we'll primarily use here, the citric acid cycle, refers to the first molecule that forms during the cycle's reactions—citrate, or, in its protonated form, citric acid. However, you may also hear this series of reactions called the tricarboxylic acid (TCA) cycle, for the three carboxyl groups on its first two intermediates, or the Krebs cycle, after its discoverer, Hans Krebs. Whatever you prefer to call it, the citric cycle is a central driver of cellular respiration. It takes acetyl CoA \text_2 FADH 2 ​ start text, F, A, D, H, end text, start subscript, 2, end subscript —generated in the TCA cycle will pass their electrons into the electron transport chain and, through oxidative phosphorylation, will generate most of the ATP produced in cellular respiration. In eukaryotes, the citric acid cycle takes place in the matrix of the mitochondria, just like the conversion of pyruvate to acetyl CoA \text CoA start text, C, o, A, end text . In prokaryotes, these steps both take place in the cytoplasm. The citric acid cycle is a closed loop; the last part of the pathway reforms the molecule used in the first step. The cycle includes eight major steps. Simplified diagram of the citric acid cycle. First, acetyl CoA combines with oxaloacetate, a four-carbon molecule, losing the CoA group and forming the six-carbon molecule citrate. After citrate undergoes a rearrangement step, it undergoes an oxidation reaction, transferring electrons to NAD+ to form NADH and releasing a mole...

The correct option is B Mitochondria The breakdown of pyruvate to give carbon dioxide, water and energy take place in the mitochondria. Glucose is broken down into pyruvate and energy is released in the form of ATP in the cytoplasm. Pyruvate is taken into mitochondria and then enters Krebs cycle where it is broken down into carbon dioxide and water, yielding ATP and other by-products which then enter electron transport chain to give rise to more ATPs. Q. Question 12 The correct sequence of anaerobic reactions in yeast is (a) G l u c o s e c y t o p l a s m − −−−−− → P y r u v a t e m i t o c h o n d r i a − −−−−−−− → E t h a n o l + C a r b o n d i o x i d e (b) G l u c o s e c y t o p l a s m − −−−−− → P y r u v a t e c y t o p l a s m − −−−−− → L a c t i c a c i d (c) G l u c o s e c y t o p l a s m − −−−−− → P y r u v a t e m i t o c h o n d r i a − −−−−−−− → L a c t i c a c i d (d) G l u c o s e c y t o p l a s m − −−−−− → P y r u v a t e c y t o p l a s m − −−−−− → E t h a n o l + C a r b o n d i o x i d e

• The breakdown of pyruvatein order to generate carbon dioxide, water, and energy (ATP)in the presence of oxygenis known as aerobic respiration. • Aerobic respiration mainly occurs in the eukaryotic cellswhen they have oxygen in sufficient amountand it takes place in the Mitochondria. • Hence, the correct answer is Mitochondria.

Learning Objectives • Identify the reactants and products of aerobic cellular respiration. • Explain each step of aerobic cellular respiration and where in the cell it occurs. Not only do plants produce sugars through photosynthesis, but they also break down these sugars to generate usable energy in the form of ATP through aerobic cellular respiration. Glucose begins its breakdown outside of the mitochondria in a metabolic pathway called glycolysis. However, the majority of the reactions that produce ATP happen within the mitochondria (in eukaryotic cells; Figure \(\PageIndex\) carbon dioxide + water + energy Step 1: Glycolysis When glucose is transported into the cytoplasm of cells, it is broken down into two molecules of pyruvate (Figure \(\PageIndex\): When NAD + is reduced to NADH, it gains one proton (H +) and two electrons (e -). The reverse reaction (oxidation) can also occur. The chemical structure of NAD + is a modified version of two nucleotides attached together. It is represented by ADP (adenosine diphosphate) attached to ribose (rib, a five-carbon sugar), attached to a ring of carbon and nitrogen. Step 2: Pyruvate oxidation If oxygen is present, aerobic cellular respiration can continue. The two molecules of pyruvate are transported into the matrix of the mitochondrion. During transport, each pyruvate is converted into a 2-carbon molecule called acetyl-\(\ce\)). Step 3: The Citric Acid (Krebs) Cycle The two acetyl-\(\ce\): Combined view of pyruvate oxidation a...

MCQ Questions for Class 10 Science Chapter 6 Life Processes CBSE Class 10 SCIENCE Question Type MCQ No. of Questions 80+ Useful for Class 10 Studying Students Class 10 Science Chapter 6 Life Processes MCQs with Answers Q.1. During respiration exchange of gases take place in (a) trachea and larynx (b) alveoli of lungs (c) alveoli and throat (d) throat and larynx Answer Answer: (b) Q.2. Blood from superior vena cava flows into (a) right atrium (b) right ventricle (c) left atrium (d) left ventricle Answer Answer: (a) Q.3. The green colour of plants is due to the presence of (a) chlorophyll (b) carotene (c) xanthophyll (d) starch Answer Answer: (a) Q.4. The correct sequence of anaerobic reactions in yeast is [NCERT Exemplar] Answer Answer: (d) Q.5. Lipase acts on (a) amino acids (b) fats (c) carbohydrates (d) all of these Answer Answer: (b) Q.6. Blood consist of what fluid medium? (a) Lymph (b) Platelets (c) Plasma (d) All of these Answer Answer: (c) Q.7. In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body? [NCERT Exemplar] (a) Pisces and amphibians (b) Amphibians and reptiles (c) Amphibians only (d) Pisces only Answer Answer: (d) Q.8. A student sets up an experiment to study the role of enzymes in digestion of food. In which test tube, the digestion of protein will occur? (a) Test tubes A as pepsin will breakdown protein into simple molecules. (b) Test tube B as HCl will breakdown protein into simple molecules...