ch6 Q bio

The Krebs cycle produces.. ?

ATP, NADH, FADH2, CO2

What first happens to the two-carbon molecule, acetyl CoA, as it enters the Krebs cycle.. ?

It is combined with a four-carbon sugar to form a six-carbon sugar.

The reactions in glycolysis are reversible; however, the conversion of pyruvate into acetyl CoA is irreversible in animal cells. Can fatty acids be converted back into carbohydrates.. ?

No, because they enter metabolism as acetyl CoA.

In cellular respiration, the energy found in the covalent bonds in glucose is used to form ATP. ?

false?

Philodendron flowers pass electrons through an electron transport chain to generate heat. What are the sources of these electrons.. ?

NADH and FADH2

Substrate-level phosphorylation occurs when protons pass through ATP synthase and combine with oxygen and electrons to make water. ?

false

Anaerobic respiration is most common in.. ?

archaeans

The products of cellular respiration are.. ?

carbon dioxide, water, and ATP

In glycolysis and the Krebs cycle, electrons are removed from glucose and taken up by molecules like NAD+. In such a reaction, glucose is being _____ and NAD+ is being ____. ?

oxidized; reduced

Philodendron flowers have to use a lot of energy to attract beetles as pollinators. This is similar to the energy used by many other flowering plants to produce ____ in order to attract pollinators. ?

nectar

The "spent" electrons from electron transport in aerobic cellular respiration are transferred to..?

oxygen, thereby reducing it to form water.

Glycolysis of a glucose molecule.. ?

produces a net gain of two molecules of ATP.

Alcoholic fermentation.. ?

produces far less ATP than aerobic respiration. produces carbon dioxide. produces ethanol. is carried out by yeasts. (all are correct)

Glycolysis and the Krebs cycle do not capture all of the energy in a glucose molecule because.. ?

some energy is always lost as heat during chemical reactions.

Aerobic respiration uses oxygen as its final electron acceptor at the end of the electron transport chain. ?

true

Proteins in your diet can be used as a reactant in cellular respiration pathways. ?

true

The Krebs cycle runs.. ?

twice, once for each acetyl CoA that was formed from the glucose molecule.

During glycolysis, ________ molecules of ____________ are required to activate glucose. ?

two; ATP