Microbiology: Principles and Explorations
9th Edition
ISBN: 9781118743164
Author: Jacquelyn G. Black, Laura J. Black
Publisher: WILEY
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Chapter 5, Problem 13SQ
Summary Introduction
Introduction: The chemical processes are the method or means of
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Which of the following statements is not true? (a) Glycolysis is the first stage of cellular respiration. (b) Glycolysis can proceed under low oxygen levels with the assistance of fermentation. (c) Glycolysis produces less ATP than does either the Krebs cycle or oxidative phosphorylation. (d) Glycolysis produces most of the ATP required by aerobic organisms like us.
Which statement best describes the reason why some of the reactions of glycolysis
cannot be run in reverse in gluconeogenesis?
1)
The last reactions occur in mitochondria and reactions there can never be
reversed.
2) Glycolysis includes isomerization reactions and these can never be reversed.
3)
There are some allaşteric enzymes and allosteric enzymes can never be
reversed.
4)
Some reactions have such large negative free energy changes that they can
never be reversed under cellular conditions.
O
All of the following are true statements concerning glycolysis EXCEPT:
It occurs in the cytoplasm of the cell.
It uses, as well as produces, ATP
It produces ATP by oxidative phosphorylation.
It involves the conversion of a molecule of glucose into two molecules of pyruvic acid.
It is also called the Embden-Meyerhof pathway.
Question 20
Chapter 5 Solutions
Microbiology: Principles and Explorations
Ch. 5 - How are photosynthesis and respiration related to...Ch. 5 - What is the main difference between...Ch. 5 - Distinguish between coenzyme and cofactor. How are...Ch. 5 - Prob. 2.2SCCh. 5 - Prob. 3.1SCCh. 5 - If four actual molecules of ATP are produced for...Ch. 5 - Prob. 3.3SCCh. 5 - Prob. 3.4SCCh. 5 - Prob. 4.1SCCh. 5 - What is returned to chlorophyll in cyclic...
Ch. 5 - What were probably the first kind of...Ch. 5 - What type of metabolism is characteristic of...Ch. 5 - Prob. 1CCSCh. 5 - Suppose that you had a culture known to contain...Ch. 5 - In what sequence might the different kinds of...Ch. 5 - Prob. 3CTQCh. 5 - Which of the following is not true about...Ch. 5 - Prob. 2SQCh. 5 - Prob. 3SQCh. 5 - Prob. 4SQCh. 5 - Prob. 5SQCh. 5 - Prob. 6SQCh. 5 - Prob. 7SQCh. 5 - Prob. 8SQCh. 5 - All of the following statements about competitive...Ch. 5 - Prob. 10SQCh. 5 - What is feedback inhibition? (a) When the end...Ch. 5 - Which of the following is true regarding the...Ch. 5 - Prob. 13SQCh. 5 - Prob. 14SQCh. 5 - During aerobic cell respiration most of the energy...Ch. 5 - The typical end products of complete aerobic cell...Ch. 5 - Prob. 17SQCh. 5 - The end products of photosynthesis in...Ch. 5 - Which of the following final electron acceptors is...Ch. 5 - Prob. 20SQCh. 5 - Prob. 21SQ
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- Write a one-sentence explanation for each of the following statements. (a) When the charge index is 1, the cell will not proceed for glycolysis. (b) Glycolysis evolved earlier than photosynthetic organisms. (c) Gluconcogenesis is not a reversal of glycolysis.arrow_forward11) To which molecule is Glucose broken down in the process of glycolysis? What happens with pyruvate in the presence of oxygen (hint: it will enter a cell organelle to feed into chemical reactions called....) 12) Which molecule carries energy rich electrons from the intermediates of the citric acid cycle to the electron transport chain. NADH 13) Which of the following states (of this electron carrier) carries energy rich electrons: 1) NAD+ 2) NADH? 14) Is oxygen required for aerobic respiration to take place? In which step of aerobic respiration is oxygen required? 15) Define fermentation? 16) Which of the three steps of aerobic respiration can take place in absence of oxygen? 17) What is the fate of pyruvate in absence of oxygen (e.g., when oxygen consumption exceeds oxygen intake during intense exercise)?arrow_forwardIn one of the steps of glycolysis, the enzyme pyruvate kinase catalyzes the conversion of phosphoenolpyruvate to pyruvate; the phosphate group from phosphoenolpyruvate is transferred to ADP to form ATP during the reaction. This process is an example of: A) O ATP synthesis by substrate-level phosphorylation B) O coupling an energy releasing process to an energy requiring process C) O oxidative phosphorylation D) OB and C are correct E) OA and B are correctarrow_forward
- a) How many moles of ATP can be gained from the catabolism of the following substrates to pyruvate? 2 Mole mannose 2 Mole lactose mole glycerol. b) Name three metabolic processes in the cell that are enhanced and two that are inhibited in response to the hormone insulinarrow_forwardWhich of the following about glycolysis ARE/IS correct? (choose all that apply) a) During glycolysis, a Cys residue on an enzyme works as a nucleophile to attack a carbonyl group on a substrate. b) The net result of a single glycolysis run on one molecule of glucose creates two molecules of pyruvate and 2 ATP c) If you label C3 and C4 in glucose, after it is converted to lactate, you can't find any labeled carbons. please explain your answer(s)arrow_forwardWhich of the following statements about glucose metabolism is correct? * Red blood cells can catalyse aerobic glycolysis because they contain oxygen bound to haemoglobin. Fructose cannot be used for gluconeogenesis in the liver. Glycolysis can proceed in the absence of oxygen only if pyruvate is formed from lactate in muscle. All of the reactions of glycolysis are freely reversible for gluconeogenesis. Red blood cells can only metabolise glucose by anaerobic glycolysis and the pentose phosphate pathway.arrow_forward
- Identify the following as a characteristic of one or more following process: glycolysis, glycogenesis, Glycogenolysis, and gluconeogenesis. 1. Glucose 6-phosphate is the initial reactant 2. Glucose is the final product 3. Glucose 6-phosphate is produced in the first step 4. UTP is involved in the process 5. ADP is converted to ATP in this processarrow_forwardWhich of the following statements regarding the glycolysis pathway is FALSE? A) O Two pyruvate molecules are generated. B) O ATP molecules are generated via substrate-level phosphorylation C) O It does not require oxygen to operate D) O ATPS are used (hydrolyzed) in the beginning of glycolysis. E) O None of the above are false; they are all true statementsarrow_forward(a) Starting with one molecule of glucose, how many ATPs are produced during (I) aerobic and (II) anaerobic respiration? (b) In chemiosmotic (oxidative) phosphorylation, what is the most direct source of energy that is used to convert ADP + Pi to ATP and what the driving force for the ATP formation through ATP synthase?arrow_forward
- The term "glucose" refers to hexoses and their sources in general. As much as one third of the glucose respired by plants does not enter glycolysis directly. Rather, the glucose goes through the oxidative pentose phosphate pathway (phosphogluconate shunt) first. What are the advantages and disadvantages of sending glucose through the oxidative pentose phosphate pathway?arrow_forwardThe true statement is A) O Fermentation is anaerobic respiration B) O The oxygen you inhale is ultimately converted to water C) O Glucose is reduced during glycolysis to form pyruvate. D) OA +AG metabolic process is one that could be linked to ATP formation. E) O None of A-D is true.arrow_forwardCellular respiration is a metabolic process that breaks down glucose to produce adenosine triphosphate (ATP). Oxygen is an essential molecule to efficiently divert the glucose into an energy-rich molecules needed to sustain activities of the cell. Hence, carbon dioxide and water are the end-products of cellular respiration. The overall process can be refined into three main metabolic stages namely (1) glycolysis, (2) tricarboxylic acid cycle (TCA cycle), and (3) oxidative phosphorylation. In plant cells, the enzymes that catalyze the individual steps involved in respiration and energy conservation are located in highly organized compartment called mitochondrion. In this laboratory activity, you will use the germinated mung beans (Vigna radiata) to demonstrate what happens to the stored sugar in the seed upon its utilization during cellular respiration. At the end of the experiment, you are expected to identify what are the different factors that affect cellular respiration.arrow_forward
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