Cellular respiration

What electron carrier is used to harvest energy from glucose molecules in a series of gradual steps in the cytoplasm?

NAD+

Cellular respiration occurs in which type of organism?

all organisms

Which statement accurately reflects the process of glycolysis?

Glycolysis is most likely one of the earliest of all biochemical reaction to evolve. It does not use molecular oxygen, and all its reactions occur free in the cytoplasm.

Which process procedures carbon dioxide and water as waste products?

cellular respiration

Where do the final steps of aerobic cellular respiration occur?

inside the mitochondria

Aerobic cellular respiration

produces a net gain of 36 ATP molecules.

Cells release energy from molecules such as glucose in a process very similar to inhalation of air and exhalation of carbon dioxide by humans, a process known as cellular

respiration

Which of the following statements about metabolic pathways are true?

Each one is regulated by specific enzyme.

Muscle cells in athletes often have more mitochondria than do muscle cells in nonathletes. Based on this observation, it can be inferred that the muscle cells in athletes

Have a greater demand for energy than do the muscle cells of non-athletes.

During cellular respiration carbon skeletons are broken down and converted to other forms: I)lipids; II)polysaccharides; III)proteins. Which of these are sources of carbon skeleton?

I, II, and III

Which statement best describes cellular respiration?

It is the release of stored chemical energy in food to produce ATP.

What energy-releasing pathway are your cells using to make ATP right now?

aerobic respiration

Which end product of respiration is of the greatest benefit to organism?

ATP molecules

Which statement based describes the function of adenosine tri-phosphate (or ATP) in a cell?

ATP stored energy produced by respiration for use by proteins around the cell to do cellular work.

Which of the following describes the fate of oxygen utilized directly during cellular respiration?

Accepting electrons at the end of the electron transport chain.

Which of the following is NOT part of cellular respiration?

Calvin Cycle

ATP molecules

Can both store energy and provide it for metabolic reactions.

Electron transport systems involve 1.electron transfers. 2. All of these. 3. Ion transport 4. enzymes and cofactors. 5. cell membranes

2.All of these.

ATP is 1.the molecule all living cells rely on to do work. 2.the cells principal compound for energy transfers. 3.All of these. 4. a short-term energy-storage compound. 5.synthesized within mitochondria.

3.All of these.

Which molecules stores energy by linking charged phosphate groups together?

ATP

Which statement accurately reflects what happens to a glucose molecule during the initial 5 phases of glycolysis?

Glucose, a six-carbon sugar, enters the cell by passive transport and is primed and converted into glucose three-phosphate, which requires two ATP molecules; the remaining four steps involve splitting the six-carbon molecule into two three-carbon molecules.

Which statement best describes cellular respiration?

It converts energy in food into a more usable form.

What is the fate of an extra 15 lbs of fat, recently lost by a person after switching over on to a rigorous diet?

It was released as CO2 and H2O

When you inhale, you are taking in oxygen for aerobic respiration. During which stage of aerobic respiration is oxygen necessary?

electron transport phosphorylation

In animal cells, the energy convert ADP to ATP comes directly from

organic molecules (like sugar).

When a molecule loses hydrogen atoms (as opposed to hydrogen ions), it becomes

oxidized