8. Respiration

Glycolysis

Glycolysis Pathway Made Simple !!  Biochemistry Lecture on Glycolysis

Glycolysis (and Exploding Sugar Demo!)

Phases of Glycolysis

In glycolysis, ________ is oxidized and ________ is reduced.
a. NAD+ ... glucose
b. glucose ... oxygen
c. ATP ... ADP
d. glucose ... NAD+

Glycolysis! (Mr. W's Music Video)

No. This is a product of glycolysis and has the lowest energy.

No. Although this is the form in which compounds enter glycolysis, glucose is further transformed before energy is recovered from glycolysis.

No. This has greater energy than glucose alone because of the addition of a phosphate from the hydrolysis of ATP, but there is an answer with still higher energy.

No. This compound occurs in glycolysis after the six-carbon skeleton of glucose has been broken into two three-carbon compounds.

Consider the input and output of ATP from the glycolysis pathway.

Which of the following molecules in the process of glycolysis possesses the most chemical energy?

Steps of Glycolysis Reactions Explained - Animation - SUPER EASY

Glycolysis Example 1

Animation: Glycolysis

No. This is where the citric acid cycle occurs.

No. This is where the electron transport chain is found.

In the intermembrane space of the mitochondrion

No. This is the space in the mitochondria where protons accumulate for the chemiosmotic synthesis of ATP.

Across the inner membrane of the mitochondrion

No. Chemiosmotic synthesis of ATP occurs across the inner mitochondrial membrane.

Prokaryotic cells use glycolysis, and they have no organelles.

Where do the reactions of glycolysis occur in a eukaryotic cell?

glycolysis

A net gain of four ATP per one glucose molecule.

Conversion of one glucose molecule to two pyruvate molecules.

Which of the following is a result of glycolysis?a) A net gain of four ATP per one glucose molecule.b) Conversion of FAD to FADH2.c) Conversion of one glucose molecule to two pyruvate molecules.d) Conversion of NADH to NAD+.

There are no oxidation or reduction reactions in glycolysis to produce CO2.

No. The fact that glycolysis produces NADH means that something was oxidized and NAD+ was reduced.

There is very little ATP produced in glycolysis.

No. The fact that little ATP is produced has nothing to do with whether CO2 is produced.

The initial steps of glycolysis require an input of energy in the form of ATP (two per glucose).

No. This is a true statement, but it does not explain why there is no CO2 production in glycolysis.

Glucose contains more carbons than the number of carbons found in the pyruvate products that are produced by glycolysis.

No. This would require that some carbon be released during glycolysis.

The products of glycolysis contain the same total number of carbon atoms as in the starting material.

Consider the fate of the carbon atoms in glucose during glycolysis.

There is no production of carbon dioxide in glycolysis. Which of the following is the best explanation for this fact?

MAKE CONNECTIONS Step 3 in Figure 9.9 is a major point of regulation of glycolysis. The enzyme phosphofructokinase is allosterically regulated by ATP and related molecules (see Concept 8.5). Considering the overall result of glycolysis, would you expect ATP to inhibit or stimulate activity of this enzyme? Explain. (Hint: Make sure you consider the role of ATP as an allosteric regulator, not as a substrate of the enzyme.) <img src="https://lightcat-files.s3.amazonaws.com/problem_images/707b17b141a48148-1665773576427.jpg" alt="" />

No. This is the process by which electron transport makes most of the ATP in cellular respiration.

No. Fermentation is the anaerobic metabolism of pyruvate from this process.

No. This is the process that yields acetyl-coA, the fuel for the citric acid cycle.

No. The citric acid cycle uses the pyruvate produced by this process.

Which of the processes in cellular respiration result in the splitting of sugar?

Which of the following is the process in which glucose is oxidized to generate two molecules of pyruvate and in which ATP and NADH are produced?

No. Cellular respiration is not available to organisms or cells that function in an environment without oxygen.

No. The citric acid cycle does not work well under anaerobic conditions (it needs oxygen to oxidize NADH).

No. The electron transport chain requires oxygen as the final electron acceptor; not all organisms live in the presence of oxygen.

No. There are cells and organisms incapable of fermentation.

Consider how differences in the environment might affect some of these processes.

Of the listed metabolic pathways, which is the only pathway found in all organisms?

Remembering Phases of Glycolysis

Where does the first stage of aerobic cellular respiration take place within a cell?a) Mitochondrial matrix.b) Inner mitochondrial membrane.c) Intermembrane space.d) Cytoplasm.

Glycolysis | HHMI BioInteractive Video

2 NAD+, 2 pyruvate, and 2 ATP.

Starting with one molecule of glucose, glycolysis results in the net production of which of the following sets of energy-containing products?a) 2 NAD+, 2 pyruvate, and 2 ATP.b) 2 NADH, 2 pyruvate, and 2 ATP.c) 4 NADH, 2 pyruvate, and 4 ATP.d) 6 CO2, 2 pyruvate, and 2 ATP.

bacteria are prokaryotes; they usually do not need to perform glycolysis

No. Almost all cells use glycolysis as part of their energy-producing reactions.

glycolysis produces so little ATP that the drug will have little effect

No. Although glycolysis produces only a small amount of ATP, it is important for other reasons.

this step in the pathway of glycolysis can be skipped in bacteria but not in humans

No. The pathway of glycolysis is the same in all organisms.

glycolysis can occur without the action of enzymes

No. Glycolysis, like all metabolic pathways, requires the use of enzymes.

human cells must also perform glycolysis; the drug might also poison them

Consider the widespread use of glycolysis.

A chemist has discovered a drug that blocks phosphoglucoisomerase, an enzyme that catalyzes the second reaction in glycolysis. He wants to use the drug to kill bacteria in people with infections. However, he cannot do this because __________.

Cellular Respiration 2 - Glycolysis

BioFlix: Glycolysis

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