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Glycolysis Quiz

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Questions and Answers

During which phase of glycolysis is more ATP produced than originally consumed?

Yield phase (correct)

Investment phase

Both phases produce equal amounts of ATP

ATP production is not a part of glycolysis

How are atom balance and charges balanced in the glycolysis reaction?

Atom balance is maintained by the release of CO2, and charges are balanced by the transfer of electrons

Atom balance is maintained by phosphate groups contributing oxygen atoms, and charges are balanced by the difference between ADP and ATP (correct)

Atom balance is maintained by the addition of water molecules, and charges are balanced by the exchange of protons

Atom balance is maintained by the formation of NADH, and charges are balanced by the donation of electrons

What is the overall reaction of glycolysis?

C6H12O6 + 2ADP + 2Pi + 2NAD⁺ $\rightarrow$ 2C3H4O3 + 2ATP + 2NADH + 2H⁺ + 2H₂O (correct)

C6H12O6 $\rightarrow$ 2C3H4O3

C6H12O6 + 2NAD⁺ $\rightarrow$ 2C3H4O3 + 2NADH + 2H⁺

C6H12O6 + 6O2 $\rightarrow$ 6CO2 + 6H2O + Energy

What is the cellular environment tendency for ADP?

$ADP^{3-}$ tends to exist in an ionic bond with $Mg^{2+}$ Signup and view all the answers

What contributes to the overall hydrogen ion count in glycolysis?

$Pi$ groups dissociating to contribute $2H^+$ overall Signup and view all the answers

What is the net ATP yield per glucose molecule in glycolysis?

2 ATP Signup and view all the answers

What is the overall charge of ADP in the cellular environment?

$ADP^{3-}$ Signup and view all the answers

How many oxygen atoms are contributed overall when each hydrogen phosphate anion binds to an ADP molecule during glycolysis?

2 O Signup and view all the answers

What maintains atom balance in the overall reaction of glycolysis?

$Pi$ groups Signup and view all the answers

How are charges balanced in the glycolysis reaction?

$ADP$ and $ATP$ difference Signup and view all the answers

Study Notes

Glycolysis Overview

Glycolysis is a metabolic pathway that converts glucose (C6H12O6) into pyruvate.
Occurs in the liquid part of cells, the cytosol.

Energy Production

Free energy released in glycolysis is used to form high-energy molecules ATP and NADH.

Characteristics

Glycolysis is a sequence of ten reactions catalyzed by enzymes.
Wide occurrence of glycolysis in other species indicates it is an ancient metabolic pathway.

Ancient Origins

Reactions of glycolysis and pentose phosphate pathway can occur in oxygen-free conditions, catalyzed by metal ions.
This is a plausible prebiotic pathway for abiogenesis.

Types of Glycolysis

The most common type of glycolysis is the Embden–Meyerhof–Parnas (EMP) pathway.
Discovered by Gustav Embden, Otto Meyerhof, and Jakub Karol Parnas.
Glycolysis also refers to other pathways, such as the Entner–Doudoroff pathway and various heterofermentative and homofermentative pathways.

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Description

Test your knowledge of glycolysis, the metabolic pathway that converts glucose into pyruvate, producing ATP and NADH. This quiz covers the reactions, enzymes, and significance of glycolysis in various organisms.