Question 1

Cells contain the molecule GTP (guanosine triphosphate). Would this molecule be useful as an energy carrier (similar to ATP)?

Accepted Answer

A) No, because it does not contain the adenosine necessary for storing energy. 
B) No, because it contains fewer phosphates than ATP. 
C) Yes, because it contains a nitrogenous base just like ATP. 
D) Yes, because it contains the same number of phosphates as does ATP. 
A) No, because it does not contain the adenosine necessary for storing energy. 
B) No, because it contains fewer phosphates than ATP. 
C) Yes, because it contains a nitrogenous base just like ATP. 
D) Yes, because it contains the same number of phosphates as does ATP.

Question 2

Excess carbon dioxide in the atmosphere is increasing climate change. How do photosynthesis and cellular respiration relate to this issue and how can we use this knowledge to help decrease this problem?

Accepted Answer

Photosynthesis takes in carbon

Question 3

For each characteristic below, state if it applies to photosynthesis and/or cellular respiration.
a.photosynthesis only
b.cellular respiration only
c.both photosynthesis and cellular respiration
d.neither photosynthesis nor cellular respiration
-produces light energy

Accepted Answer

The answer of For each characteristic below, state if it...

Question 4

Which step of cellular respiration occurs outside the mitochondria?

Accepted Answer

A) glycolysis 
B) Krebs cycle 
C) Calvin cycle 
D) electron transport chain 
A) glycolysis 
B) Krebs cycle 
C) Calvin cycle 
D) electron transport chain

Question 5

As an energy carrier, ATP differs from NADPH in that

Accepted Answer

A) ATP transfers energy through phosphorylation, whereas NADPH donates electrons and hydrogen ions. 
B) ATP transfers energy through redox reactions, whereas NADPH uses phosphorylation. 
C) NADPH is involved in a larger variety of chemical reactions than ATP. 
D) NADPH is made by Photosystem I, whereas ATP is made by Photosystem II. 
A) ATP transfers energy through phosphorylation, whereas NADPH donates electrons and hydrogen ions. 
B) ATP transfers energy through redox reactions, whereas NADPH uses phosphorylation. 
C) NADPH is involved in a larger variety of chemical reactions than ATP. 
D) NADPH is made by Photosystem I, whereas ATP is made by Photosystem II.

Question 6

What should the arrow in the following equation be labeled? Sugar + oxygen à carbon dioxide + water + ATP.

Accepted Answer

A) photosynthesis 
B) cellular respiration 
C) Krebs cycle 
D) Calvin cycle 
A) photosynthesis 
B) cellular respiration 
C) Krebs cycle 
D) Calvin cycle

Question 7

Photosynthesis and cellular respiration cycle the element ________ through the environment. When a plant does photosynthesis, it takes this element from the air and produces sugars. When animals conduct cellular respiration, they break down sugars and exhale a gas that contains this element.

Accepted Answer

The answer of Photosynthesis and cellular respiration cycle the element...

Question 8

The enzyme rubisco is important to the process of

Accepted Answer

A) catabolism. 
B) fermentation. 
C) glycolysis. 
D) carbon fixation. 
A) catabolism. 
B) fermentation. 
C) glycolysis. 
D) carbon fixation.

Question 9

The chemical 3-(3,4-dichloro-phenyl)-1,1-dimethylurea (DCMU) blocks the movement of electrons at the point indicated by the black, downward-pointing arrow in the figure below. Which of the following would be an immediate effect of treating a chloroplast with this drug?

Accepted Answer

A) Water molecules would be split at a faster rate than when the drug is not present. 
B) The amount of NADPH produced by the light reactions would increase. 
C) A proton gradient would not be created, so ATP could not be made. 
D) The production of water would increase. 
A) Water molecules would be split at a faster rate than when the drug is not present. 
B) The amount of NADPH produced by the light reactions would increase. 
C) A proton gradient would not be created, so ATP could not be made. 
D) The production of water would increase.

Question 10

Chemical reactions that break down lipids are

Accepted Answer

A) catabolic. 
B) anabolic. 
C) metabolic. 
D) respiration. 
A) catabolic. 
B) anabolic. 
C) metabolic. 
D) respiration.

Question 11

What would occur if the mitochondria of a cell did not produce an inner membrane?

Accepted Answer

A) The mitochondria would be unable to maintain the proton gradient required for ATP production. 
B) The mitochondria would be unable to capture ATP from the sun. 
C) The mitochondria would be unable to perform the Krebs cycle. 
D) The mitochondria would be unable to perform glycolysis. 
A) The mitochondria would be unable to maintain the proton gradient required for ATP production. 
B) The mitochondria would be unable to capture ATP from the sun. 
C) The mitochondria would be unable to perform the Krebs cycle. 
D) The mitochondria would be unable to perform glycolysis.

Question 12

A given enzyme

Accepted Answer

A) can be used for many different kinds of chemical reactions. 
B) is permanently changed during a chemical reaction. 
C) has a special site where the products bind before the reaction begins. 
D) increases the rate of a particular reaction. 
A) can be used for many different kinds of chemical reactions. 
B) is permanently changed during a chemical reaction. 
C) has a special site where the products bind before the reaction begins. 
D) increases the rate of a particular reaction.

Question 13

Glycolysis is an anaerobic process, indicating that the glycolytic reactions

Accepted Answer

A) require no oxygen. 
B) produce molecular oxygen. 
C) produce ATP. 
D) produce citric acid. 
A) require no oxygen. 
B) produce molecular oxygen. 
C) produce ATP. 
D) produce citric acid.

Question 14

For each characteristic below, state if it applies to photosynthesis and/or cellular respiration.
a.photosynthesis only
b.cellular respiration only
c.both photosynthesis and cellular respiration
d.neither photosynthesis nor cellular respiration
-used by plant cells

Accepted Answer

The answer of For each characteristic below, state if it...

Question 15

Cells would not be able to survive unless anabolic and catabolic processes occurred in linked reactions. Support or refute this statement.

Accepted Answer

This statement is true because

Question 16

Photosynthetic organisms capture energy from sunlight and convert it into chemical bonds by forming

Accepted Answer

A) sugars. 
B) enzymes. 
C) work. 
D) substrates. 
A) sugars. 
B) enzymes. 
C) work. 
D) substrates.

Question 17

Which of the following statements comparing photosynthesis and cellular respiration is accurate?

Accepted Answer

A) Photosynthesis is a catabolic pathway whereas cellular respiration is an anabolic pathway. 
B) Water is formed during photosynthesis but broken apart during cellular respiration. 
C) Both photosynthesis and cellular respiration require electron transport chains. 
D) Both photosynthesis and cellular respiration produce CO₂ as metabolic end products. 
A) Photosynthesis is a catabolic pathway whereas cellular respiration is an anabolic pathway. 
B) Water is formed during photosynthesis but broken apart during cellular respiration. 
C) Both photosynthesis and cellular respiration require electron transport chains. 
D) Both photosynthesis and cellular respiration produce CO₂ as metabolic end products.

Question 18

The first law of thermodynamics states that

Accepted Answer

A) metabolic reactions must be balanced. 
B) the flow of energy connects living things to their environments. 
C) energy cannot be created nor destroyed. 
D) systems tend to become more disorderly. 
A) metabolic reactions must be balanced. 
B) the flow of energy connects living things to their environments. 
C) energy cannot be created nor destroyed. 
D) systems tend to become more disorderly.

Question 19

A new bacterial cell is found that is able to grow without food as long as sunlight is available. This cell likely uses ________ to produce its own food.

Accepted Answer

The answer of A new bacterial cell is found that...

Question 20

A plant cell is mutated so ATP synthase no longer functions. Which process will be affected?

Accepted Answer

A) photosynthesis only 
B) respiration only 
C) both photosynthesis and respiration 
D) neither photosynthesis nor respiration 
A) photosynthesis only 
B) respiration only 
C) both photosynthesis and respiration 
D) neither photosynthesis nor respiration

Exam 4: How Cells Work

Cells contain the molecule GTP (guanosine triphosphate). Would this molecule be useful as an energy carrier (similar to ATP)?

Excess carbon dioxide in the atmosphere is increasing climate change. How do photosynthesis and cellular respiration relate to this issue and how can we use this knowledge to help decrease this problem?

For each characteristic below, state if it applies to photosynthesis and/or cellular respiration. a.photosynthesis only b.cellular respiration only c.both photosynthesis and cellular respiration d.neither photosynthesis nor cellular respiration -produces light energy

Which step of cellular respiration occurs outside the mitochondria?

As an energy carrier, ATP differs from NADPH in that

What should the arrow in the following equation be labeled? Sugar + oxygen à carbon dioxide + water + ATP.

Photosynthesis and cellular respiration cycle the element ________ through the environment. When a plant does photosynthesis, it takes this element from the air and produces sugars. When animals conduct cellular respiration, they break down sugars and exhale a gas that contains this element.

The enzyme rubisco is important to the process of

The chemical 3-(3,4-dichloro-phenyl)-1,1-dimethylurea (DCMU) blocks the movement of electrons at the point indicated by the black, downward-pointing arrow in the figure below. Which of the following would be an immediate effect of treating a chloroplast with this drug?

Chemical reactions that break down lipids are

What would occur if the mitochondria of a cell did not produce an inner membrane?

A given enzyme

Glycolysis is an anaerobic process, indicating that the glycolytic reactions

For each characteristic below, state if it applies to photosynthesis and/or cellular respiration. a.photosynthesis only b.cellular respiration only c.both photosynthesis and cellular respiration d.neither photosynthesis nor cellular respiration -used by plant cells

Cells would not be able to survive unless anabolic and catabolic processes occurred in linked reactions. Support or refute this statement.

Photosynthetic organisms capture energy from sunlight and convert it into chemical bonds by forming

Which of the following statements comparing photosynthesis and cellular respiration is accurate?

The first law of thermodynamics states that

A new bacterial cell is found that is able to grow without food as long as sunlight is available. This cell likely uses ________ to produce its own food.

A plant cell is mutated so ATP synthase no longer functions. Which process will be affected?

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