Glycolysis and the Krebs Cycle POGIL

what molecule from food is the primary reactant for glycolysis

glucose, C6H12O6

how many carbon atoms are in glucose

6

how many carbon atoms are in a pyruvate molecule

3

how many pyruvate molecules are made from each glucose molecule

2

does the process of glycolysis require an input of energy

yes, glucose is a high potential energy molecule. 2 ATP molecules are needed to convert glucose to two pyruvates

does pyruvate have more or less potential energy than glucose

no, 4 ATP is made as it is converted to pyruvate

what is the net production of ATP by glycolysis

2

what molecule acts as an electron acceptor in glycolysis

NADH

describe the origins of the four inorganic phosphates

two groups of inorganic phosphates are added to the glucose molecule and produces phosphoglyceraldehyde (pgal), two other inorganic phosphates are added to phal to produce 1,3 biphosphoglycerate

where does the link reaction take place

the inner matrix of the mitochondria

is the pyruvate molecule likely to move across the mitochondrial membranes by diffusion

no, pyruvate is a polar molecule and would not diffuse through the non polar lipid bilayer easily

how could a pyruvate molecule move across the mitochondrial membrane

through a protein carrier

what molecule is removed through decarboxylation

carbon dioxide

what is the name of decarboxylated pyruvic acid

acetyl

how many carbons of the pyruvate molecule remain when it is attached to Coenzyme A

2

when coenzyme A bonds to the decarboxylated pyruvic acid what molecule is produced

acetyl CoA

why is the connection between coenzyme a and the acetyl group weak

it has a double line

has any ATP been used or produced during the link reaction

no

have any other high potential energy molecules been produced during the link reaction

yes, NADH

where does the krebs cycle occur

the mitochondrial matrix

what molecule is introduced to the krebs cycle from the link reaction

acetyl coa

is oxygen needed for the krebs cycle

no

how many carbons are in oxaloacetate

4

how many carbons are in citrate

6

where did the extra carbon atoms come from to convert oxaloacetate into citrate

two carbons are in the acetyl group that enters the Krebs cycle

how many carbon atoms are in ketoglutarate

5

where did the missing carbon atom go during the conversion of citrate to ketoglutarate

a carbon dioxide molecule was produced

what are the high potential energy molecules produced in the krebs cycle and how many are produced with one turn

1 ATP, 3 NADH, 1 FADH2

which molecule in the krebs cycle has the highest potential energy

citrate, energy is released and it has the most carbon

which molecule in the krebs cycle has the lowest potential energy

oxaloacetate, it is the result of reactions where energy was released

does the acetyl group of atoms have a high potential energy or a low potential energy

they have high potential energy because it converts a low potential energy molecule to a high potential energy molecule

how many turns of the krebs cycle occur for every glucose molecule that undergoes cellular respiration

2 because there are two pyruvate

how many CO2 molecules are produced in the krebs cycle

2

how many ATP molecules are produced in the krebs cycle

2

how many NADH are produced in the krebs cycle

6

how many FADH2 are produced in the krebs cycle

2

was oxygen needed as a reactant in glycolysis, the link reaction, or the krebs cycle

no