8. Respiration

Pyruvate Oxidation

Regulation of Pyruvate Dehydrogenase

Pyruvate is reduced, and a molecule of carbon dioxide is removed. The electrons removed in this process are used to oxidize NAD+ to NADH.

 No. You have reduction and oxidation mixed up. 

Pyruvate is oxidized, and a molecule of carbon dioxide is removed. The electrons removed in this process are donated to NADH to produce NAD+.

 No. Though pyruvate is oxidized and a molecule of carbon dioxide is removed, NADH is already reduced, so it cannot accept electrons. 

 Pyruvate is reduced to acetyl-coA, which involves the reduction of pyruvate, the addition of a carbon dioxide from the environment, and its reduction by NADH. 

 No. Although acetyl-coA is the fuel for the citric acid cycle, you have the steps in its production backward. 

 Pyruvate is ionized directly to acetyl-coA. 

 No. There are a number of steps involved in generating the fuel for the citric acid cycle. 

Pyruvate is oxidized, and a molecule of carbon dioxide is removed. The electrons removed in this process are used to reduce NAD+ to NADH.

Think about the reactions that are involved in pyruvate metabolism as it enters the mitochondria.

In preparing pyruvate to enter the citric acid cycle, which of the following steps occurs?

Cellular Respiration 3 - TCA Cycle (Krebs Cycle)

BioFlix: Acetyl-CoA Formation

Formation of CO2 and synthesis of ATP

No. CO2 forms, but ATP does not.

Release of CO2 and release of coenzyme A

No. CO2 is released, but coenzyme A is not.

 No. Coenzyme A is incorporated into acetyl CoA. 

No. NAD+ is consumed by this reaction.

Release of CO2 and synthesis of NADH

Consider the reactions that occur during the metabolism of pyruvate from glycolysis.

Which of the following events accompanies the conversion of pyruvate to acetyl CoA before the citric acid cycle?

The Link Reaction Explained (Aerobic Respiration)

Metabolism | Transition Stage (Preparatory Phase)

Pyruvate oxidation

Cellular Respiration - Link Reaction and Krebs - Post 16 Biology (A Level, Pre-U, IB, AP Bio)

Acetyl CoA, FADH2, and CO2.

Acetyl CoA, NAD+, ATP, and CO2.

In aerobic cellular respiration, pyruvate molecules must be transformed through a process called pyruvate oxidation before they can be broken down in the Krebs Cycle. What are the products of pyruvate oxidation?a) Acetyl CoA, O2, and ATP.b) Acetyl and CO2.c) Acetyl CoA, FADH2, and CO2.d) Acetyl CoA, NADH, and CO2.e) Acetyl CoA, NAD+, ATP, and CO2.

It connects glycolysis to the citric acid cycle.

Each pyruvate is converted to an acetyl-CoA molecule.

This reaction occurs within the cytoplasm.

Carbon dioxide is released as a by-product.

Each of the following describes the pyruvate oxidation reaction except that _____________________.a) It connects glycolysis to the citric acid cycle.b) Each pyruvate is converted to an acetyl-CoA molecule.c) NAD+ is reduced to NADH.d) This reaction occurs within the cytoplasm.e) Carbon dioxide is released as a by-product.

Learn the toughest concepts covered in Biology1&2 with step-by-step video tutorials and practice problems by world-class tutors 

Jason

General Biology

https://static.studychannel.pearsonprd.tech/courses/biology/thumbnails/biology

#FFFFFF

Ninja Nerd

Mr Exham Biology

BioMan Biology

Jason Amores Sumpter

Audrey Ngoki

Handwritten Tutorials

khanacademymedicine

1. Introduction to Biology

2. Chemistry

3. Water

4. Biomolecules

5. Cell Components

6. The Membrane

7. Energy and Metabolism

9. Photosynthesis

10. Cell Signaling

11. Cell Division

12. Meiosis

13. Mendelian Genetics

14. DNA Synthesis

15. Gene Expression

16. Regulation of Expression

17. Viruses

18. Biotechnology

19. Genomics

20. Development

21. Evolution by Natural Selection

22. Evolution of Populations

23. Speciation

24. History of Life on Earth

25. Phylogeny

26. Prokaryotes

27. Protists

28. Plants

29. Fungi

30. Overview of Animals

31. Invertebrates

32. Vertebrates

33. Plant Anatomy

34. Vascular Plant Transport

35. Soil

36. Plant Reproduction

37. Plant Sensation and Response

38. Animal Form and Function

39. Digestive System

40. Circulatory System

41. Immune System

42. Osmoregulation and Excretion

43. Endocrine System

44. Animal Reproduction

45. Nervous System

46. Sensory Systems

47. Muscle Systems

48. Ecology

49. Animal Behavior

50. Population Ecology

51. Community Ecology

52. Ecosystems

53. Conservation Biology

[BOOK BIO] CLUTCH

Introduction to Cellular Respiration

Electron Transport Chain

Glycolysis

Types of Phosphorylation

Fermentation & Anaerobic Respiration

Chemiosmosis

Review of Aerobic Cellular Respiration

Krebs Cycle

Redox Reactions

General Chemistry

Jules

Study the key concepts of Physics with descriptive videos, questions, and more

Physics

Patrick

Financial Accounting

Brian

Dive deep into Psychology with videos, practice problems, and more.

Psychology

Microeconomics

The first in a two-course sequence introduces the basic structure and functions of the human body

Anatomy & Physiology

College Algebra covers algebraic topics and skills necessary to succeed in college-level math

College Algebra

Organic Chemistry

Johnny

Genetics

Kylia

GOB Chemistry

Microbiology

Cell Biology

Analytical Chemistry

Study topics incliding trogonometric functions, identities and equations, solutions of triangles, complex numbers, and other topics as time permits

Trigonometry

Learn the toughest concepts covered in Precalculus with step-by-step video tutorials and practice problems by world-class tutors

Precalculus

Biochemistry

Macroeconomics

Chemistry

Biology

Math

Business

Social Sciences

Michelle Barry Franco

Building Great Presentations

Eric Zackrison, PhD

Critical Thinking And Problem Solving

Sam Bennett

Embracing Times Of Uncertainty

Nicole Tetreault, PhD

Emotional Intelligence Basics

Eugene Choi, PharmD

Enhancing Your Critical Thinking Skills

Jason Richardson, PsyD

Habits To Win Every Day

Alyssa Lowery, PhD

Having Powerful Advanced Conversations

Don Gilman, EdD

How To Influence & Persuade

Amy Matthews

Leadership Skills For Rising Stars

Listening To Lead

Michael Shermer, PhD

Making Decisions Under Uncertainty

Lynne Hurdle

Mistakes To Avoid When Resolving Conflict

Michael Veltri

Overcoming Decision Making Traps

Mike Vardy

Prioritizing Effectively

Secrets Of Effective Prioritization

Strategies To Build Up Your Creativity

Tools For Decision Making

Tutti Taygerly

Unleash And Advance Your Creativity

Winning Collaboration: How To Work More Effectively With Different Personalities