Lexi Schofield
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The breaking down of glucose

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Lexi Schofield
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Cellular Respiration Final

Question 1 of 40

1

The process occurring within living cells which releases chemical energy stored in food as shown in the following reaction is called:
Glucose -> CO2 + H2O + Energy

Select one of the following:

  • Glycolysis

  • Enzymatic Breakdown

  • Cellular Respiration

  • Photosynthesis

Explanation

Question 2 of 40

1

The majority of the energy released in the breakdown of glucose is trapped by an energy transfer compound known as:

Select one of the following:

  • NADP

  • NAD

  • ATP

  • NADPH2

Explanation

Question 3 of 40

1

The energy transfer compound described in the preceding problem which traps the majority of the energy released in the breakdown of glucose:

Select one of the following:

  • is different for protists than for animals

  • is the same compound for the majority of all living organisms

  • is the same compound for all living organisms

  • is different for plants than for animals

Explanation

Question 4 of 40

1

Once formed, the energy transfer compound referred to in the preceding problem releases its stored energy needed for the maintenance of various activities within the cell by:

Select one of the following:

  • donating a high energy electron

  • donating a pair of hydrogen ions

  • losing hydrogen atoms to a cytochrome system

  • losing its terminal phosphate group

Explanation

Question 5 of 40

1

The first major set of reactions occurring in the breakdown of glucose involves the stripping away of hydrogen atoms resulting in the production of two 3-carbon molecules of pyruvic acid. This process is called:

Select one of the following:

  • Fermentation

  • Glycolysis

  • Oxidation

  • Enzymatic breakdown

Explanation

Question 6 of 40

1

Under the right conditions, the hydrogen atoms which are stripped away during the process described in the preceding problem are picked up by a carrier molecule known as:

Select one of the following:

  • NAD

  • ADP

  • NADH2

  • NADP

Explanation

Question 7 of 40

1

The carrier molecules referred to in the preceding problem transfer the hydrogen ions and their high-energy electrons to a system which moves the electrons down an energy gradient. This system is called the:

Select one of the following:

  • Hydrogen transport system

  • Cytochrome transport system

  • Electron transport chain

  • respiratory chain

  • all of the above

Explanation

Question 8 of 40

1

After the electrons have passed through the system described in the preceding problem, the hydrogen ions and their electrons are picked up by another hydrogen acceptor which is:

Select one of the following:

  • NADH2

  • ADP

  • NAD

  • O2

Explanation

Question 9 of 40

1

The compound formed from the union of the hydrogen ions, electrons, and the hydrogen acceptor molecule described in the preceding problem is:

Select one of the following:

  • NADH2

  • H2O

  • H2O2

  • NADPH2

Explanation

Question 10 of 40

1

The entire sequence of reactions described from problems 5 to 9 will occur:

Select one of the following:

  • only in the presence of oxygen

  • only in the presence of light

  • Whether or not oxygen is present

  • whether or not light is present

Explanation

Question 11 of 40

1

When no oxygen is present, the breakdown of glucose into two molecules of pyruvic acid results in the net production of ______ molecules of ATP.

Select one of the following:

  • 6

  • 8

  • 4

  • 2

Explanation

Question 12 of 40

1

When no oxygen is present, the conditions are said to be:

Select one of the following:

  • non-oxidative

  • aerobic

  • anaerobic

  • antiaerobic

Explanation

Question 13 of 40

1

Under the conditions described in the preceding problem, the pyruvic acid formed from the breakdown of glucose can be further broken down under an overall process known as:

Select one of the following:

  • cellular respiration

  • the Kreb's cycle

  • fermentation

  • glycolysis

Explanation

Question 14 of 40

1

The ultimate hydrogen acceptor molecule in the process described in the preceding problem is:

Select one of the following:

  • pyruvic acid

  • acetic acid

  • O2

  • NAD

Explanation

Question 15 of 40

1

In yeast cells the final end product(s) of the process described in problem 13 is/are:

Select one of the following:

  • Water and carbon dioxide

  • Ethyl Alcohol

  • Ethyl alcohol and carbon dioxide

  • lactic acid and carbon dioxide

Explanation

Question 16 of 40

1

In animal cells, the final end product(s) of the process described in problem 13 is/are

Select one of the following:

  • ethyl alcohol and carbon dioxide

  • lactic acid and carbon dioxide

  • lactic acid

  • water and carbon dioxide

Explanation

Question 17 of 40

1

If the conditions are aerobic the overall breakdown of glucose continues, as pyruvic acid is further broken down in a second major set of reactions called:

Select one of the following:

  • oxidative photophosphorylation

  • the Kreb's cycle

  • substrate-level phosphorylation

  • cyclic photphosphorylation

Explanation

Question 18 of 40

1

Before actually entering the process described in the preceding problem, each molecule of pyruvic acid is first broken down to form:

Select one of the following:

  • Acetyl - CoA and acetic acid

  • Coenzyme A and acetic acid

  • Acetyl - CoA and carbon dioxide

  • Coenzyme A and carbon dioxide

Explanation

Question 19 of 40

1

Which lab did you like best and why?

Select one or more of the following:

  • Sourdough bread

  • Root Beer lab

  • Enzyme potato lab

  • Jello lab

Explanation

Question 20 of 40

1

Acetyl - CoA formed in the breakdown of pyruvic acid transfers a 2-carbon acetyl group to a molecule of:

Select one of the following:

  • -ketoglutaric acid

  • citric acid

  • lactic acid

  • oxaloacetic acid

Explanation

Question 21 of 40

1

The molecule thus formed from the reaction described in the preceding problem is known as

Select one of the following:

  • lactic acid

  • citric acid

  • oxaloacetic acid

  • - ketoglutaric acid

Explanation

Question 22 of 40

1

For each molecule of glucose, _________ molecules of carbon dioxide are given off in the breakdown of citric acid to oxaloacetic acid.

Select one of the following:

  • 6

  • 4

  • 8

  • 2

Explanation

Question 23 of 40

1

In the entire sequence of reactions leading to the complete breakdown of glucose, a total of __________ molecules of ATP are formed when all processes are considered!

Select one of the following:

  • 32

  • 38

  • 36

  • 34

Explanation

Question 24 of 40

1

Dried yeast is introduced into a vacuum bottle containing a 25% molasses solution. After a period of time, a gas begins to be given off. The gas which is given off is most likely:

Select one of the following:

  • CO3

  • CO2

  • H2O

  • O2

Explanation

Question 25 of 40

1

During the first three steps of glycolysis, ________ molecules must be invested per glucose molecule in order to overcome certain endergonic steps.

Select one of the following:

  • 2 ATP

  • 2 NADH

  • 4 ATP

  • 4 NADH

  • 6 ATP

Explanation

Question 26 of 40

1

For each molecule of glucose processed by glycolysis, there is a net energy yield of:

Select one of the following:

  • 2 ATP and 2 NADH

  • 2 ATP and 4 NADH

  • 4 ATP and 2 NADH

  • 4 ATP and 4 NADH

Explanation

Question 27 of 40

1

The complete breakdown of pyruvic acid in the presence of oxygen is an:

Select one of the following:

  • anaerobic process that releases a large amount of energy

  • aerobic process that produces lactic acid or ethanol

  • anaerobic process that releases little usable energy

  • aerobic process that releases a large amount of energy

  • anaerobic process that produces lactic acid and ethanol

Explanation

Question 28 of 40

1

An oxygen debt may be accumulated in muscle cells by __________ during short bursts of intense muscular activity.

Select one of the following:

  • the carboxylation of pyruvic acid

  • glycolysis as pyruvic acid is produced under anaerobic conditions

  • the production of lactic acid under anaerobic conditions

  • electron transport as NADH is reoxidized to NAD+

  • the Kreb's cycle as acetyl CoA is completely oxidized

Explanation

Question 29 of 40

1

LActic Acid is converted to pyruvic acid in the:

Select one of the following:

  • liver

  • muscles

  • brain

  • spleen

  • stomach

Explanation

Question 30 of 40

1

In eukaryotes, the enzymes involved in the Kreb's cycle and electron transport are located in the:

Select one of the following:

  • cell membrane

  • cytoplasm

  • mitochondria

  • peroxisomes

  • lysosomes

Explanation

Question 31 of 40

1

Respiration is a 2-stage process that occurs in the _____________ and consists of ____________.

Select one of the following:

  • mitochondria; glycolysis and electron transport

  • cytoplasm; the Krebs cycle and electron transport

  • cytoplasm; the Krebs cycle and glycolysis

  • mitochondria; the Krebs cycle and electron transport

Explanation

Question 32 of 40

1

The folds of the inner membrane of mitochondria are called:

Select one of the following:

  • matrix

  • cisternae

  • grana

  • thylakoids

  • cristae

Explanation

Question 33 of 40

1

In eukaryotic cells, some of the enzymes associated with the Krebs cycle are located in the __________ and others are located in the __________.

Select one of the following:

  • matrix; cell membrane

  • peroxisomes; Golgi complexes

  • cytoplasm; inner membrane

  • thylakoids; grana

  • cristae; matrix

Explanation

Question 34 of 40

1

The enzymes of the electron transport system are located in the mitochondrial:

Select one of the following:

  • matrix

  • outer membrane

  • cristae

  • intermembrane space

  • cisternae

Explanation

Question 35 of 40

1

The dense solution within the inner compartment of the mitochondria that contains enzymes, coenzymes, water and phosphates is called the:

Select one of the following:

  • matrix

  • stroma

  • grana

  • cristae

  • cisternae

Explanation

Question 36 of 40

1

The Krebs cycle begins when the acetyl group of acetyl CoA is joined to _________.

Select one of the following:

  • citric acid

  • oxaloacetic acid

  • carbon dioxide

  • malic acid

  • succinic acid

Explanation

Question 37 of 40

1

THe final oxidation of the carbons from the original glucose molecule is completed in:

Select one of the following:

  • the Krebs cycle

  • glycolysis

  • the electron transport chain

  • pyruvic acid oxidation

  • alcoholic fermentation

Explanation

Question 38 of 40

1

The Krebs cycle is called a cycle because:

Select one of the following:

  • the enzymes involved are located around the edge of the mitochondrion.

  • it begins and ends with oxaloacetic acid

  • cyclic AMP is produced

  • the process involves cyclic phosphorylation

  • the product of one reaction is the substrate of the next reaction.

Explanation

Question 39 of 40

1

The organelle that is a major producer of ATP and is found in both heterotrophs and autotrophs is the

Select one of the following:

  • chloroplast

  • nucleus

  • ribosome

  • Golgi apparatus

  • mitchondrion

Explanation

Question 40 of 40

1

Lactic acid metabolism is important for what reason?

Select one of the following:

  • It makes 2 ATP

  • It releases 4 ATP from NADPH2

  • It provides a burst of energy to move when oxygen has run out

  • B and C

  • None of the above

Explanation

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