The endosymbiotic theory suggests that mitochondria were originally:

Chemosynthetic aerobic prokaryotes

Chemosynthetic anaerobic prokaryotes

Photosynthesis is an endergonic reaction because:

It stores energy by building a large sugar molecule.

It releases CO2 as a waste product.

It produces ATP from ADP and Pi.

It breaks down glucose into smaller molecules.

Why is the bond between the last two phosphate groups in ATP essential to its function?

Breaking this bond releases the energy needed for cellular work.

The bond absorbs water to prevent dehydration.

Breaking this bond produces CO2.

The bond carries electrons to the ETC.

Which statement best explains why plants carry out both photosynthesis and cellular respiration?

Photosynthesis makes the food (glucose), and respiration breaks the food down for ATP.

Photosynthesis provides CO2 for respiration.

Respiration only happens at night, and photosynthesis only during the day.

Respiration is needed to produce O2 for the Calvin cycle.

The light-dependent reactions convert light energy into what form of chemical energy to be used in the Calvin cycle?

ATP and the electron carrier NADPH

Glycolysis is an anaerobic stage because:

It does not require oxygen to break down glucose.

It only occurs in organisms that die in the presence of oxygen.

It only occurs in the mitochondria.

It produces a net gain of 34 ATP.

The primary role of NADH and FADH2 in the Krebs cycle and glycolysis is to:

Carry high-energy electrons (Hydrogen) to the Electron Transport Chain.

Act as a final electron acceptor.

Cellular respiration and photosynthesis are often described as complementary cycles because:

The products of one process are the reactants of the other.

Both processes produce ATP in the same organelle.

They both require light energy.

They both occur in the cytosol of the cell.

Why do muscle cells perform lactic acid fermentation during strenuous exercise?

The cells use up oxygen faster than it can be supplied, forcing them into an alternate ATP pathway.

The cells need to produce alcohol.

The function of the H+ gradient (high H+ concentration in the inner membrane space) created by the ETC in the mitochondria is to:

Power the ATP synthase enzyme to produce ATP.

Transport glucose into the matrix.

Break down Pyruvic acid into Acetyl-CoA.

The main reason organisms need to take in food (carbon-based molecules) is:

To obtain the energy needed to re-charge ADP to ATP.

To provide the water needed for the ETC.

Autotrophs are also known as producers because they:

Produce their own food (glucose).

Only perform cellular respiration.

Are always single-celled organisms.

What is the essential difference between aerobic and anaerobic respiration?

The requirement or non-requirement of oxygen.

Which process most directly explains why yeast is used in bread-making?

Alcoholic fermentation, as it produces CO2 (which causes the bread to rise).

Aerobic respiration, which produces heat.

Glycolysis, which breaks down yeast proteins.

The overall purpose of the Calvin cycle is to:

Use CO2, ATP, and NADPH to make glucose (sugar).

Transport electrons across the thylakoid membrane.

In glycolysis, 2ATP are used to break down the glucose, and 4ATP are produced. This results in a net gain of 2ATP because:

The initial 2ATP were reactants needed to start the splitting of glucose.

The two ATP are recycled back into the cycle.

2ATP are needed to fuel the Krebs cycle.

2ATP are lost to heat during the reaction.

Which of the following best describes the energy flow in a cellular ecosystem?

Light energy → Chemical energy (Glucose) → ATP → Heat energy

Chemical energy → Light energy → ATP → Heat energy

Heat energy → ATP → Glucose → Light energy

ATP → Glucose → Chemical energy (food) → Heat energy

Why is cellular respiration essential for all organisms, including plants?

All living organisms require ATP to carry out metabolic functions.

Only animals need to break down glucose.

Plants only make ATP during the day.

Plants only need to store energy, not use it.

The fact that the end products of photosynthesis (C6H12O6 and O2) are the starting reactants for cellular respiration is an example of:

Matter and energy flow through complementary cycles.

Why does the ETC and Oxidative Phosphorylation produce so much more ATP than glycolysis?

It utilizes the stored chemical energy in NADH and FADH2 to power ATP synthase.

The Krebs cycle provides a final ATP boost.

Glycolysis is only for CO2 production.

The outer membrane of the mitochondria holds all the ATP.

A scientist genetically engineers a plant to produce an enzyme that causes its chlorophyll to absorb a much higher percentage of green light. What would likely happen to the plant's photosynthetic rate?

The rate would increase, as less light would be reflected.

The rate would stay the same, as the plant only needs red and blue light.

The rate would decrease because green light is toxic.

The rate would only increase during the night.

A bacterium is classified as an obligate anaerobe (dies in the presence of oxygen). What can you conclude about its method of ATP production?

It uses anaerobic respiration and cannot perform the O2 - requiring steps of cellular respiration.

It only uses aerobic respiration.

It produces ATP through the Calvin cycle.

GB1 Q2 - Practice Test Quiz

65 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final step of aerobic cellular respiration that produces the vast majority of ATP?

Glycolysis

Krebs Cycle

Oxidative Phospholyration

Light Dependent Reaction

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In eukaryotic cells, where does the Krebs cycle (Citric Acid cycle) primarily take place?

Cytoplasm

Inner membrane of the mitochondria (cristae)

Thylakoid membrane

Mitochondrial fluid matrix

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Organisms that must take in glucose from an outside source are called:

Autotrophs

Producers

Heterotrophs

Photoautotrophs

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The immediate source of energy for all metabolic reactions in a cell is provided by which molecule?

Glucose

CO2

H2O

ATP

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the two main products of the light-dependent reactions of photosynthesis that are used in the Calvin cycle?

CO2 and Glucose

H2O and O2

ATP and NADPH

Pyruvic Acid and FADH2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The process of CO2 being attached to other molecules in the stroma during the Calvin cycle is known as:

Reduction

Oxidation

Fixation

Regeneration

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The final electron acceptor in the Electron Transport Chain (ETC) of aerobic respiration is:

CO2

O2

H2O

Glucose

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GB1 Q2 - Practice Test

What is the final step of aerobic cellular respiration that produces the vast majority of ATP?

In eukaryotic cells, where does the Krebs cycle (Citric Acid cycle) primarily take place?

Organisms that must take in glucose from an outside source are called:

The immediate source of energy for all metabolic reactions in a cell is provided by which molecule?

What are the two main products of the light-dependent reactions of photosynthesis that are used in the Calvin cycle?

The process of CO2 being attached to other molecules in the stroma during the Calvin cycle is known as:

The final electron acceptor in the Electron Transport Chain (ETC) of aerobic respiration is:

Which process in cellular respiration breaks down glucose into two molecules of pyruvic acid (pyruvate)?

Fermentation is an 'alternate route' taken when what substance is not available for aerobic organisms?

The waste product created when Hydrogen ions join Oxygen at the end of the mitochondrial ETC is:

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GB1 Q2 - Practice Test

What is the final step of aerobic cellular respiration that produces the vast majority of ATP?

In eukaryotic cells, where does the Krebs cycle (Citric Acid cycle) primarily take place?

Organisms that must take in glucose from an outside source are called:

The immediate source of energy for all metabolic reactions in a cell is provided by which molecule?

What are the two main products of the light-dependent reactions of photosynthesis that are used in the Calvin cycle?

The process of CO2​ being attached to other molecules in the stroma during the Calvin cycle is known as:

The final electron acceptor in the Electron Transport Chain (ETC) of aerobic respiration is:

Which process in cellular respiration breaks down glucose into two molecules of pyruvic acid (pyruvate)?

Fermentation is an 'alternate route' taken when what substance is not available for aerobic organisms?

The waste product created when Hydrogen ions join Oxygen at the end of the mitochondrial ETC is:

Access all questions and much more by creating a free account

Similar Resources on Wayground

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The process of CO2 being attached to other molecules in the stroma during the Calvin cycle is known as: