BIO 185 Lecture 16: Lecture 16

34 views3 pages

blushseal279

20 Jul 2016

School

Department

Course

Professor

For unlimited access to Class Notes, a Class+ subscription is required.

Document Summary

2 oaa (oxceloacetate) => keeps cycle running joins with acetyl coa (produces citric acid: net from 3 processes: Fadh2 pumps its electrons to complex 2 (not enough to pump protons through complex 2) 1 nadh pumps 10 h+ (2 1/2 atp) 1 fadh2 pumps 6 h+ (1 1/2 atp) 28, combined with 4 from net = 32 atp from oxidizing 1 glucose molecule. What about organisms that do not use o2: obligate anaerobes (ex. sulfur-reducing bacteria) still oxidize glucose electron transport chain - electron acceptor is sulfur or anaerobic respiration (fermentation) Facultative anaerobes - can do aerobic or anaerobic yeast and bacteria also muscle cells can switch depending on environment. Facultative anaerobes: no o2, no electron transport chain - then ethanol (final electron acceptor: acetylaldehyde) Medical case study - gallicide and the girl: worksheet - good exam questions. Part 2: a more detailed analysis of the cells of the heart showed that atp was absent from the mitochondria.

Related Questions

Which of the following is not a net product of the citric acid cycle for each molecule of pyruvate generated in glycolysis?

Select one:

a. 1 ATP (GTP)

b. 1 acetyl coA

c. 3 NADH

d. 1 FADH2

Question 2

Which of the following is NOT an end product for an acetyl group that enters the citric acid cycle?

Select one:

a. ATP

b. NADH

c. FADH2

d. oxaloacetate

Question 3

Once they have been processed through the citric acid cycle, the acetyl-CoA molecules from a single glucose molecule produce:

Select one:

a. 2 ATP, 6 NADH, 4 CO₂.

b. 6 NADH, 6 GTP.

c. 6 FADH₂, 2 ATP, 6 CO₂.

d. 6 GTP, 6 FADH₂.

e. 4 CO₂, 6 FADH₂, 2 ATP.

Question 4

The products of the citric acid cycle breaking down 2 acetyl-CoA include 2 ATP (converted from GTP), 6 NADH and 2 FADH2.

Select one:

True

False

The reduced nucleotides NADH and FADH are converted to ATP via the electron transport chain and oxidative phosphorylation. The most widely accepted values among biochemists are shown.

Nucleotide Output	ATP Output
NADH	2.5
FADH₂	1.5

Each acetyl CoA entering the citric acid cycle produces two CO₂, three NADH, one FADH₂, and one GTP (converted directly to ATP in the cell). Taking into consideration the conversion of reduced nucleotides to ATP, what is the total number of ATP produced by one glucose (2 Acteyl CoA) going through the citric acid cycle?

Carbohydrates are broken down into glucose monomer and dimers. Glucose is converted to pyruvate and then to acetyl CoA. Acetyl CoA enters the citric acid cycle and is broken down to CO2 and in the process produces NADH & FADH2, which is utilized in the generation of ATP via the electron transport chain. Why does the cell go through this elaborate pathway to convert glucose to carbon dioxide and water and in the process generate ATP? Why not use a simpler and shorter mechanism to breakdown glucose?

BIO 185 Lecture 16: Lecture 16

Document Summary

Get access

Related textbook solutions

Molecular Cell Biology

Biology: Science for Life with Physiology

Concepts of Biology

Biology

Essentials of Biology

Related Documents

BIO 185 Lecture Notes - Lecture 3: Atp Synthase, Mitochondrial Matrix, Anaerobic Respiration

BIOLOGY 151 Lecture Notes - Lecture 27: Transmembrane Protein, Atp Synthase, Starch

BIOL 1100 Lecture Notes - Lecture 15: Citric Acid Cycle, Acetyl-Coa, Oxidative Phosphorylation

Related Questions