Really want to learn about glycolysis? Go to my glycolysis tutorial, which will take you through the whole process (and which is my new, improved version of what’s below).

Here’s some other sciencemusicvideos links that you might find useful.

1. Glycolysis: Interactive Lyrics

[qwiz]

[h]Glycolysis Interactive Lyrics

[q labels = “top”]

__________ is a series of reactions,
Enzymatic actions, energy transactions,
Takes ________, a molecule so sugary,
Breaks it down for NADH and ______

 

It’s an __________ cytoplasmic pathway that amazes
Organized easily into three phases,
Investment, cleavage, and ________ harvest,
Tell me later which one you like best.

 

Investment: activation energy’s supplied,
_________: our six carbon sugar divides
Harvest: we get our energy yield,
So beautiful, so intricate keep your eyes peeled

CHORUS
Glycolysis!
Come on sugar, come on sugar, for the breakdown. For the breakdown.

[l]anaerobic

[fx] No, that’s not correct. Please try again.

[f*] Good!

[l]ATP

[fx] No, that’s not correct. Please try again.

[f*] Great!

[l]cleavage

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]energy

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[l]glucose

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]glycolysis

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[q labels = “top”]

____________ like striking a match,
That energy you put in makes the fire catch
For glycolysis investments two ATPs,
Which act as __________ energy

 

Enzymes take __________ from ATPs
Jam ‘em on a glucose rearranging it to ________,
Leaving Fructose 1- 6 bisphosphate on the table,
With two phosphates, it’s highly unstable!

[l]activation

[fx] No. Please try again.

[f*] Good!

[l]fructose

[fx] No. Please try again.

[f*] Good!

[l]investment’s

[fx] No. Please try again.

[f*] Great!

[l]phosphate

[fx] No. Please try again.

[f*] Good!

[q labels = “top”]

Moving us to the second phase
The cleaving of Fructose _____________
Cause glycolysis means ________ sugar, you can see
cleavage yields two molecules with carbons _______

 

One is ______________ 3 phosphate G3P
It continues on our pathway broken down for energy
But the second one an enzyme will immediately,
Convert into a second _____

 

CHORUS

[l]bisphosphate

[fx] No. Please try again.

[f*] Good!

[l]glyceraldehyde

[fx] No, that’s not correct. Please try again.

[f*] Great!

[l]splitting

[fx] No. Please try again.

[f*] Correct!

[l]three

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]G3P

[fx] No. Please try again.

[f*] Good!

[q labels = “top”]

Phase 3: ______ gets rearranged and ________,
By an enzymatic assembly line,
That harvest energy from each G3P
One ________ and 2 ATPs

 

Double this yield per G3P
To two NADH and _____ ATPs
That’s the gross yield for every ________ in
A generous accounting of glycolysis’s win

[l]4

[fx] No. Please try again.

[f*] Great!

[l]G3P

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]glucose

[fx] No. Please try again.

[f*] Good!

[l]NADH

[fx] No, that’s not correct. Please try again.

[f*] Great!

[l]oxidized

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[q labels = “top”]

But 2 ______ were invested in phase 1
So you net just two you can use to jump or run,
Put two in, get four out, your net gain is ______,
Two ATPs that you can use.

 

If that doesn’t seem like very much, it’s cause it ain’t,
There’s tons of energy left in _________,
The two _______ carbon molecules we’re left with at the end.
And what happens to pyruvate is gonna depend,

 

On the metabolic pathway where pyruvate gets sent,
If its anaerobic it’ll be __________
But in aerobic cells pyruvate’s termination
Will be the Krebs cycle and total _________!
CHORUS

[l]ATPs

[fx] No, that’s not correct. Please try again.

[f*] Great!

[l]fermented

[fx] No. Please try again.

[f*] Correct!

[l]oxidation

[fx] No, that’s not correct. Please try again.

[f*] Great!

[l]pyruvate

[fx] No, that’s not correct. Please try again.

[f*] Great!

[l]three

[fx] No, that’s not correct. Please try again.

[f*] Great!

[l]two

[fx] No, that’s not correct. Please try again.

[f*] Great!

[q labels = “top”]

Review: glycolysis starts with __________
of two ATPs to the ________ that we started with,
The product is cleaved into two ______
From which the cell harvests ______ and ______.

 

This anaerobic pathway is ____________ first phase,
It’s billions of year’s old evolved in ancient days
before O2 accumulated in the seas, before
eukaryotic cells like ours arrived on the scene

 

It’s everywhere, ubiquitous, in every organism,
Bacteria, sequoia tree, no matter your metabolism,
Happens in the __________ doesn’t need no organelles.
You wanna find glycolysis? Look in any cell!

[l]ATPs

[fx] No. Please try again.

[f*] Good!

[l]cytoplasm

[fx] No, that’s not correct. Please try again.

[f*] Good!

[l]G3Ps

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]glucose

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[l]investment

[fx] No. Please try again.

[f*] Correct!

[l]NADH

[fx] No, that’s not correct. Please try again.

[f*] Good!

[l]respiration’s

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[x]

[restart]

[/qwiz]

2. Glycolysis: Interactive Diagram

[qwiz]
[h] Glycolysis Interactive Diagram

[q labels = “top”]

 

 

[l]ATP

[fx] No. Please try again.

[f*] Excellent!

[l]ADP

[fx] No. Please try again.

[f*] Correct!

[l]2ATP

[fx] No. Please try again.

[f*] Great!

[l]2ADP

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[l]CLEAVAGE

[fx] No. Please try again.

[f*] Correct!

[l]ENERGY HARVEST

[fx] No. Please try again.

[f*] Excellent!

[l]G3P

[fx] No. Please try again.

[f*] Correct!

[l]glucose-6-
phosphate

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]glucose

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]fructose-1-6-
bisphosphate

[fx] No. Please try again.

[f*] Excellent!

[l]GLYCOLYSIS

[fx] No, that’s not correct. Please try again.

[f*] Good!

[l]pyruvate

[fx] No, that’s not correct. Please try again.

[f*] Good!

[l]INVESTMENT

[fx] No. Please try again.

[f*] Good!

[l]NAD+

[fx] No. Please try again.

[f*] Excellent!

[l]NADH

[fx] No, that’s not correct. Please try again.

[f*] Good!

[/qwiz]

3. Glycolysis Flashcards

Each one of these three flashcard decks covers the entire process of glycolysis. Work each one of them to mastery, and you should wind up understanding the process well. Please leave me a comment below or send me an email to let me know what you think.

[qdeck random = “true”]

[h]Glycolysis Flashcards Set 1

[!!!!!] CARD NUMBER 1 [/!!!!!]

[q]__________ takes glucose and breaks it down in order to create NADH and ATP.

[textentry]

[a]Glycolysis takes glucose and breaks it down in order to create NADH and ATP.

[!!!!!] CARD NUMBER 2 [/!!!!!]

[q]Glycolysis takes glucose and breaks it down in order to create NADH and __________.

[textentry]

[a]Glycolysis takes glucose and breaks it down in order to create NADH and ATP.

[!!!!!] CARD NUMBER 3 [/!!!!!]

[q]Glycolysis is an __________ metabolic pathway.

[textentry]

[a]Glycolysis is an anaerobic metabolic pathway.

[!!!!!] CARD NUMBER 4 [/!!!!!]

[q]The three phases of glycolysis are investment, __________, and energy harvest.

[textentry]

[a]The three phases of glycolysis are investment, cleavage, and energy harvest.

[!!!!!] CARD NUMBER 5 [/!!!!!]

[q]During the __________ phase of glycolysis, activation energy is supplied.

[textentry]

[a]During the investment phase of glycolysis, activation energy is supplied.

[!!!!!] CARD NUMBER 6 [/!!!!!]

[q]During the cleavage phase of glycolysis, a __________ carbon sugar is split into two.

[textentry]

[a]During the cleavage phase of glycolysis, a six carbon sugar is split into two.

[!!!!!] CARD NUMBER 7 [/!!!!!]

[q]The __________ phase of glycolysis involves two ATPs.

[textentry]

[a]The investment phase of glycolysis involves two ATPs.

[!!!!!] CARD NUMBER 8 [/!!!!!]

[q]The ATPs used during the __________ phase of glycolysis act as activation energy.

[textentry]

[a]The ATPs used during the investment phase of glycolysis act as activation energy.

[!!!!!] CARD NUMBER 9 [/!!!!!]

[q]During the investment phase of glycolysis, two ATPs are put onto ___________, rearranging it into Fructose 1- 6 bisphosphate

[textentry]

[a]During the investment phase of glycolysis, two ATPs are put onto glucose, rearranging it into Fructose 1- 6 bisphosphate

[!!!!!] CARD NUMBER 10 [/!!!!!]

[q]You can think of Fructose 1- 6 bisphosphate as a rearranged ___________ with two phosphate groups attached to it.

[textentry]

[a]You can think of Fructose 1- 6 bisphosphate as a rearranged glucose with two phosphate groups attached to it.

[!!!!!] CARD NUMBER 11 [/!!!!!]

[q]During the cleavage phase of glycolysis, __________ 1- 6 bisphosphate is split into two three carbon molecules.

[textentry]

[a]During the cleavage phase of glycolysis, Fructose 1- 6 bisphosphate is split into two three carbon molecules.

[!!!!!] CARD NUMBER 12 [/!!!!!]

[q]”Cause glycolysis means splitting __________, you can see
cleavage yields two molecules with carbons three”

[textentry]

[a]”Cause glycolysis means splitting sugar, you can see
cleavage yields two molecules with carbons three”

[!!!!!] CARD NUMBER 13 [/!!!!!]

[q]The main product of cleavage is __________-3-phosphate, also known as G3P

[textentry]

[a]The main product of cleavage is glyceraldehyde-3-phosphate, also known as G3P

[!!!!!] CARD NUMBER 14 [/!!!!!]

[q]Cleavage results in formation of __________ molecules of G3P.

[textentry]

[a]Cleavage results in formation of two molecules of G3P.

[!!!!!] CARD NUMBER 15 [/!!!!!]

[q]In phase 3 of glycolysis, G3P gets __________ and oxidized.

[textentry]

[a]In phase 3 of glycolysis, G3P gets rearranged and oxidized.

[!!!!!] CARD NUMBER 16 [/!!!!!]

[q]During the harvest phase, each ___________ yields one NADH and 2 ATPs

[textentry]

[a]During the harvest phase, each G3P yields one NADH and 2 ATPs

[!!!!!] CARD NUMBER 17 [/!!!!!]

[q]The __________ energy yield per molecule of glucose in glycolysis is two NADH and four ATPs

[textentry]

[a]The gross energy yield per molecule of glucose in glycolysis is two NADH and four ATPs

[!!!!!] CARD NUMBER 18 [/!!!!!]

[q]The __________ energy yield per molecule of glucose in glycolysis is two NADH and two ATPs

[textentry]

[a]The net energy yield per molecule of glucose in glycolysis is two NADH and two ATPs

[!!!!!] CARD NUMBER 19 [/!!!!!]

[q]The net energy yield per molecule of glucose in glycolysis is two NADH and __________ ATPs

[textentry]

[a]The net energy yield per molecule of glucose in glycolysis is two NADH and two ATPs

[!!!!!] CARD NUMBER 20 [/!!!!!]

[q]By the end of glycolysis, glucose has been broken down into two molecules of __________.

[textentry]

[a]By the end of glycolysis, glucose has been broken down into two molecules of pyruvic acid.

[!!!!!] CARD NUMBER 21 [/!!!!!]

[q]The __________ pathway that follows glycolysis is also known as fermentation.

[textentry]

[a]The anaerobic pathway that follows glycolysis is also known as fermentation.

[!!!!!] CARD NUMBER 22 [/!!!!!]

[q]If pyruvate is broken down __________, then it will proceed into the Krebs cycle and be completely oxidized.

[textentry]

[a]If pyruvate is broken down aerobically, then it will proceed into the Krebs cycle and be completely oxidized.

[!!!!!] CARD NUMBER 23 [/!!!!!]

[q]”Glycolysis starts with investment of two __________ to the glucose that we started with”

[textentry]

[a]”Glycolysis starts with investment of two ATPs to the glucose that we started with”

[!!!!!] CARD NUMBER 24 [/!!!!!]

[q]Glycolysis evolved before the evolution of __________ cells.

[textentry]

[a]Glycolysis evolved before the evolution of eukaryotic cells.

[x]

[restart]

[/qdeck]

 

[qdeck random = “true”]

[h]Glycolysis Flashcards Set 2

[!!!!!] CARD NUMBER 1 [/!!!!!]

[q]Glycolysis takes __________ and breaks it down in order to create NADH and ATP.

[textentry]

[a]Glycolysis takes glucose and breaks it down in order to create NADH and ATP.

[!!!!!] CARD NUMBER 2 [/!!!!!]

[q]Glycolysis is a series of reactions controlled by __________.

[textentry]

[a]Glycolysis is a series of reactions controlled by enzymes.

[!!!!!] CARD NUMBER 3 [/!!!!!]

[q]Glycolysis occurs in __________ phases.

[textentry]

[a]Glycolysis occurs in three phases.

[!!!!!] CARD NUMBER 4 [/!!!!!]

[q]The three phases of glycolysis are investment, cleavage, and __________ harvest.

[textentry]

[a]The three phases of glycolysis are investment, cleavage, and energy harvest.

[!!!!!] CARD NUMBER 5 [/!!!!!]

[q]During the investment phase of glycolysis, __________ energy is supplied.

[textentry]

[a]During the investment phase of glycolysis, activation energy is supplied.

[!!!!!] CARD NUMBER 6 [/!!!!!]

[q]During the cleavage phase of glycolysis, a six carbon sugar is split into __________.

[textentry]

[a]During the cleavage phase of glycolysis, a six carbon sugar is split into two.

[!!!!!] CARD NUMBER 7 [/!!!!!]

[q]The investment phase of glycolysis involves __________ ATPs.

[textentry]

[a]The investment phase of glycolysis involves two ATPs.

[!!!!!] CARD NUMBER 8 [/!!!!!]

[q]The ATPs used during the investment phase of glycolysis act as __________ energy.

[textentry]

[a]The ATPs used during the investment phase of glycolysis act as activation energy.

[!!!!!] CARD NUMBER 9 [/!!!!!]

[q]During the investment phase of glycolysis, two ATPs are put onto glucose, rearranging it into __________

[textentry]

[a]During the investment phase of glycolysis, two ATPs are put onto glucose, rearranging it into Fructose 1- 6 bisphosphate

[!!!!!] CARD NUMBER 10 [/!!!!!]

[q]You can think of Fructose 1- 6 bisphosphate as a rearranged glucose with two __________ groups attached to it.

[textentry]

[a]You can think of Fructose 1- 6 bisphosphate as a rearranged glucose with two phosphate groups attached to it.

[!!!!!] CARD NUMBER 11 [/!!!!!]

[q]During the cleavage phase of glycolysis, Fructose 1- 6 bisphosphate is split into __________ three carbon molecules.

[textentry]

[a]During the cleavage phase of glycolysis, Fructose 1- 6 bisphosphate is split into two three carbon molecules.

[!!!!!] CARD NUMBER 12 [/!!!!!]

[q]”Cause glycolysis means splitting sugar, you can see
cleavage yields __________ molecules with carbons three”

[textentry]

[a]”Cause glycolysis means splitting sugar, you can see
cleavage yields two molecules with carbons three”

[!!!!!] CARD NUMBER 13 [/!!!!!]

[q]The main product of cleavage is glyceraldehyde-3-__________, also known as G3P

[textentry]

[a]The main product of cleavage is glyceraldehyde-3-phosphate, also known as G3P

[!!!!!] CARD NUMBER 14 [/!!!!!]

[q]Cleavage results in formation of two molecules of __________.

[textentry]

[a]Cleavage results in formation of two molecules of G3P.

[!!!!!] CARD NUMBER 15 [/!!!!!]

[q]In phase 3 of glycolysis, G3P gets rearranged and __________.

[textentry]

[a]In phase 3 of glycolysis, G3P gets rearranged and oxidized.

[!!!!!] CARD NUMBER 16 [/!!!!!]

[q]During the harvest phase, each G3P yields __________ NADH and 2 ATPs

[textentry]

[a]During the harvest phase, each G3P yields one NADH and 2 ATPs

[!!!!!] CARD NUMBER 17 [/!!!!!]

[q]The gross energy yield per molecule of glucose in glycolysis is __________ NADH and four ATPs

[textentry]

[a]The gross energy yield per molecule of glucose in glycolysis is two NADH and four ATPs

[!!!!!] CARD NUMBER 18 [/!!!!!]

[q]The net energy yield per molecule of glucose in glycolysis is __________ NADH and two ATPs

[textentry]

[a]The net energy yield per molecule of glucose in glycolysis is two NADH and two ATPs

[!!!!!] CARD NUMBER 19 [/!!!!!]

[q]The net energy yield per molecule of glucose in glycolysis is two NADH and two __________

[textentry]

[a]The net energy yield per molecule of glucose in glycolysis is two NADH and two ATPs

[!!!!!] CARD NUMBER 20 [/!!!!!]

[q]Another word for __________ acid is pyruvate.

[textentry]

[a]Another word for pyruvic acid is pyruvate.

[!!!!!] CARD NUMBER 21 [/!!!!!]

[q]The anaerobic pathway that follows glycolysis is also known as __________.

[textentry]

[a]The anaerobic pathway that follows glycolysis is also known as fermentation.

[!!!!!] CARD NUMBER 22 [/!!!!!]

[q]If pyruvate is broken down aerobically, then it will proceed into the __________ cycle and be completely oxidized.

[textentry]

[a]If pyruvate is broken down aerobically, then it will proceed into the Krebs cycle and be completely oxidized.

[!!!!!] CARD NUMBER 23 [/!!!!!]

[q]Following investment, __________ is cleaved into two G3Ps.

[textentry]

[a]Following investment, Fructose 1-6 bisphosphate is cleaved into two G3Ps.

[!!!!!] CARD NUMBER 24 [/!!!!!]

[q]Glycolysis evolved before __________ had accumulated in ancient oceans.

[textentry]

[a]Glycolysis evolved before oxygen had accumulated in ancient oceans.

[x]

[restart]

[/qdeck]

 

[qdeck random = “true”]

[h]Glycolysis Flashcards Set 3

[!!!!!] CARD NUMBER 1 [/!!!!!]

[q]Glycolysis takes glucose and breaks it down in order to create __________ and ATP.

[textentry]

[a]Glycolysis takes glucose and breaks it down in order to create NADH and ATP.

[!!!!!] CARD NUMBER 2 [/!!!!!]

[q]Glycolysis occurs in the __________.

[textentry]

[a]Glycolysis occurs in the cytoplasm

[!!!!!] CARD NUMBER 3 [/!!!!!]

[q]The three phases of glycolysis are __________, cleavage, and energy harvest.

[textentry]

[a]The three phases of glycolysis are investment, cleavage, and energy harvest.

[!!!!!] CARD NUMBER 4 [/!!!!!]

[q]The three phases of glycolysis are investment, cleavage, and energy ___________.

[textentry]

[a]The three phases of glycolysis are investment, cleavage, and energy harvest.

[!!!!!] CARD NUMBER 5 [/!!!!!]

[q]During the __________ phase of glycolysis, a six carbon sugar is split into two.

[textentry]

[a]During the cleavage phase of glycolysis, a six carbon sugar is split into two.

[!!!!!] CARD NUMBER 6 [/!!!!!]

[q]During the last phase of glycolysis, energy is __________ for the cell to use.

[textentry]

[a]During the last phase of glycolysis, energy is harvested for the cell to use.

[!!!!!] CARD NUMBER 7 [/!!!!!]

[q]The __________ used during the investment phase of glycolysis act as activation energy.

[textentry]

[a]The ATPs used during the investment phase of glycolysis act as activation energy.

[!!!!!] CARD NUMBER 8 [/!!!!!]

[q]During the investment phase of glycolysis, two __________ are put onto glucose, rearranging it into Fructose 1- 6 bisphosphate

[textentry]

[a]During the investment phase of glycolysis, two ATPs are put onto glucose, rearranging it into Fructose 1- 6 bisphosphate

[!!!!!] CARD NUMBER 9 [/!!!!!]

[q]You can think of __________ as a rearranged glucose with two phosphate groups attached to it.

[textentry]

[a]You can think of Fructose 1- 6 bisphosphate as a rearranged glucose with two phosphate groups attached to it.

[!!!!!] CARD NUMBER 10 [/!!!!!]

[q]During the __________ phase of glycolysis, Fructose 1- 6 bisphosphate is split into two three carbon molecules.

[textentry]

[a]During the cleavage phase of glycolysis, Fructose 1- 6 bisphosphate is split into two three carbon molecules.

[!!!!!] CARD NUMBER 11 [/!!!!!]

[q]During the cleavage phase of glycolysis, Fructose 1- 6 bisphosphate is split into two __________ carbon molecules.

[textentry]

[a]During the cleavage phase of glycolysis, Fructose 1- 6 bisphosphate is split into two three carbon molecules.

[!!!!!] CARD NUMBER 12 [/!!!!!]

[q]”Cause glycolysis means splitting sugar, you can see
cleavage yields two molecules with carbons __________”

[textentry]

[a]”Cause glycolysis means splitting sugar, you can see
cleavage yields two molecules with carbons three

[!!!!!] CARD NUMBER 13 [/!!!!!]

[q]The main product of cleavage is glyceraldehyde-3-phosphate, also known as ___________

[textentry]

[a]The main product of cleavage is glyceraldehyde-3-phosphate, also known as G3P

[!!!!!] CARD NUMBER 14 [/!!!!!]

[q]In phase 3 of glycolysis, __________ gets rearranged and oxidized.

[textentry]

[a]In phase 3 of glycolysis, G3P gets rearranged and oxidized.

[!!!!!] CARD NUMBER 15 [/!!!!!]

[q]During the __________ phase, each G3P yields one NADH and 2 ATPs

[textentry]

[a]During the harvest phase, each G3P yields one NADH and 2 ATPs

[!!!!!] CARD NUMBER 16 [/!!!!!]

[q]During the harvest phase, each G3P yields one NADH and 2 __________

[textentry]

[a]During the harvest phase, each G3P yields one NADH and 2 ATPs

[!!!!!] CARD NUMBER 17 [/!!!!!]

[q]The gross energy yield per molecule of glucose in glycolysis is two NADH and ___________ ATPs

[textentry]

[a]The gross energy yield per molecule of glucose in glycolysis is two NADH and four ATPs

[!!!!!] CARD NUMBER 18 [/!!!!!]

[q]The net energy yield per molecule of glucose in glycolysis is two __________ and two ATPs

[textentry]

[a]The net energy yield per molecule of glucose in glycolysis is two NADH and two ATPs

[!!!!!] CARD NUMBER 19 [/!!!!!]

[q]By the end of glycolysis, glucose has been broken down into __________ molecules of pyruvic acid.

[textentry]

[a]By the end of glycolysis, glucose has been broken down into two molecules of pyruvic acid.

[!!!!!] CARD NUMBER 20 [/!!!!!]

[q]Another word for pyruvic acid is __________.

[textentry]

[a]Another word for pyruvic acid is pyruvate.

[!!!!!] CARD NUMBER 21 [/!!!!!]

[q]If __________ is broken down aerobically, then it will proceed into the Krebs cycle and be completely oxidized.

[textentry]

[a]If pyruvate is broken down aerobically, then it will proceed into the Krebs cycle and be completely oxidized.

[!!!!!] CARD NUMBER 22 [/!!!!!]

[q]If pyruvate is broken down aerobically, then it will proceed into the Krebs cycle and be completely __________.

[textentry]

[a]If pyruvate is broken down aerobically, then it will proceed into the Krebs cycle and be completely oxidized.

[!!!!!] CARD NUMBER 23 [/!!!!!]

[q]Following investment, Fructose 1-6 bisphosphate is cleaved into two __________.

[textentry]

[a]Following investment, Fructose 1-6 bisphosphate is cleaved into two G3Ps.

[!!!!!] CARD NUMBER 24 [/!!!!!]

[q]Glycolysis evolved before oxygen had accumulated in ancient __________.

[textentry]

[a]Glycolysis evolved before oxygen had accumulated in ancient oceans.

[x]

[restart]

[/qdeck]

Next steps