ch 6 homework

where are the enzymes of the citric acid cycle in eukaryotic cells found?

mitochondrial matrix

A gram of fat oxidized by cellular respiration produces approximately __________ as much ATP as a gram of carbohydrate.

twice

What is one thing to check for to see if it is a anaerobic reaction?

lactic acid

What enters the Krebs cycle?

Acetyl CoA

what is not produced in the krebs cycle?

Acetyl CoA

In the absence of oxygen, cells need a way to regenerate which compound?

NAD+

Through respiration, humans breathe in O2 and breathe out CO2. However, what would happen if we did not breathe in O2?

We would not make enough ATP to meet our energy requirements

Fat is a source of

abundant high energy electrons

Many intermediates from the _________ can be siphoned off and used to generate amino acids.

citric acid cycle

Which stage of cellular respiration appears to have evolved first?

glycolysis

The electron transport chain molecules are embedded in __________

inner mitochondrial membrane

In oxidative phosphorylation, electrons are passed from one electron carrier to another. The energy released is used to __________.

pump protons (H+) across the mitochondrial membrane

A muscle cell deprived of molecular oxygen will convert glucose to lactic acid to __________.

recycle NADH through fermentation

In eukaryotes, most of the high-energy electrons released from glucose by cellular respiration __________.

reduce NAD+ to NADH, which then delivers them to the electron transport chain

In the citric acid cycle (also called the Krebs cycle), ATP molecules are produced by _____.

substrate level phosphorylation

Most NADH molecules generated during cellular respiration are produced during __________.

the citric acid cycle

The enzyme ATP synthase catalyzes the phosphorylation of ADP to form ATP. In eukaryotic cells, the energy needed for this endergonic reaction is directly derived from __________.

the movement of hydrogen ions across the mitochondrial membrane