Which of the following statements is true about the citric acid cycle a. The Citric Acid Cycle is an 8-step cycle that produces the most electron carrier molecules throughout the process of cellular respiration. b. In Citric Acid Cycle, both the acetyl group and coenzyme A of Acetyl CoA are combined to oxaloacetate. c. In Citric Acid Cycle, glucose is only partially broken down and there are still remnants of glucose after this process. d. The ATP produced during this process is via oxidative phosphorylation

Which of the following statements is true about the citric acid cycle a. The Citric Acid Cycle is an 8-step cycle that produces the most electron carrier molecules throughout the process of cellular respiration. b. In Citric Acid Cycle, both the acetyl group and coenzyme A of Acetyl CoA are combined to oxaloacetate. c. In Citric Acid Cycle, glucose is only partially broken down and there are still remnants of glucose after this process. d. The ATP produced during this process is via oxidative phosphorylation

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter7: Releasing Chemical Energy

Section: Chapter Questions

Problem 11SA

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After the citric acid cycle reactions run _________, one six-carbon glucose molecule has been completely broken down to CO2. a. once b. twice c. six times d. twelve times
Which of these is not true of the citric acid cycle?a. The citric acid cycle includes the prep reaction.b. The citric acid cycle produces ATP by substrate-level ATPsynthesis.c. The citric acid cycle occurs in the mitochondria.d. The citric acid cycle produces two ATP per glucose molecule.
The consumption of acetyl-CoA by the citric acid cycle is DECREASED under which condition? A. the concentration of NAD+ being high B. the concentration of oxaloacetate being high C. NADH being rapidly re-oxidized via the electron-transport chain D. the mitochondrial ATP synthase being inactive E. the concentration of both NAD+ and oxaloacetate being high
Which of the following is the second step of Citric Acid Cycle? Select one: a. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH b. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH c. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH d. Malate is oxidized to become oxaloacetate forming NADH e. Fumarate is combined with water to become Malate f. Citrate is rearranged to become Isocitrate g. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide h. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) i. Succinate is oxidized to become fumarate forming FADH2
A key enzyme of the Citric Acid Cycle is isocitrate dehydrogenase. It catalyzes the conversion of isocitrate to alpha ketoglutarate. Given your understanding of the Citric Acid Cycle, how is the activity of isocitrate dehydrogenase likely regulated? A. It is activated when fermentation starts. B. It is activated when the levels of NADH are low relative to NAD+. C. It is activated when levels of ATP are high relative to ADP. D. It is inhibited by high levels of pyruvate.
___ molecules of ATP are ultimately formed per every acetyl-CoA that enters the citric acid cycle and the remaining ATP molecules are generated via the ___ of NADH and FADH2. A) Nine; oxidation B) Ten; reduction C) Ten; oxidation D)Nine; reduction
Which of the following statements concerning the location of the metabolic pathways is correct? a. All reactions of the glycolysis take place in the mitochondria. b. All reactions of the TCA cycle take place in the mitochondria. c. Some reactions of the TCA cycle take place in the cytosol, and some in mitochondria. d. Some reactions of the glycolysis take place in the cytosol, and some in mitochondria.
The citric acid cycle generates NADH and FADH2, which are then used in the process of oxidative phosphorylation to make ATP. If the citric acid cycle (which does not use oxygen) and oxidative phosphorylation are separate processes, as they are, then why is it that the citric acid cycle stops almost immediately when O2 is removed?
Which of the following is the sixth step of Citric Acid Cycle? Select one: a. Succinate is oxidized to become fumarate forming FADH2 b. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH c. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH d. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) e. Malate is oxidized to become oxaloacetate forming NADH f. Fumarate is combined with water to become Malate g. Citrate is rearranged to become Isocitrate h. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide i. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH
Which of the following is the third step of Citric Acid Cycle? Select one: a. Succinyl-CoA becomes Succinate and forms one ATP molecule and Coenzyme A-SH b. Pyruvate is decarboxylated to become acetyl-CoA producing NADH and Carbon dioxide c. Isocitrate and then decarboxylated and oxidized to produce alpha-ketoglutarate, Carbon dioxide and NADH d. alpha-ketoglutarate is oxidized and decarboxylated to produce Succinyl-CoA, Carbon dioxide and NADH e. Succinate is oxidized to become fumarate forming FADH2 f. Oxaloacetate combines with the acetyl from acetyl-CoA to produce Citric acid(citrate) g. Citrate is rearranged to become Isocitrate h. Malate is oxidized to become oxaloacetate forming NADH i. Fumarate is combined with water to become Malate
Many amino acids are broken down to intermediates of the citric acid cycle. (a) Why can’t these amino acid “remnants” be directly oxidized to CO2 by the citric acid cycle? (b) Explain why amino acids that are broken down to pyruvate can be completely oxidized by the citric acid cycle.
a) What is the reason for the non-oxidative phase of the pentose phosphate pathway?b) Which compound is converted into which compound in the step where sequential dehydration and hydration reactions occur in the citric acid cycle?c) Why is ammonia released in some tissues carried by binding to other molecules in the blood? Where is it transmitted in the body for its destruction? What molecule is it transferred onto there? So what molecule does it make?