Question 1

What metabolic process below do all eukaryotic green algae and higher plants have in common?

Accepted Answer

A) glycolysis 
B) photosynthesis 
C) transcription 
D) translation 
E) All of these are correct.

Question 2

Why are plants unlikely to produce many carbohydrates at night?

Accepted Answer

A) Selected Calvin cycle enzymes are inactive in the dark because they denature at night. 
B) Selected Calvin cycle enzymes are immobilized at night. 
C) Chloroplasts shrink at night. 
D) Selected Calvin cycle enzymes are inactive in the dark because thioredoxin is oxidized and cannot reduce their disulfide linkages. 
E) Selected Calvin cycle enzymes are inactive in the dark because thioredoxin is reduced and can break their disulfide linkages.

Question 3

2-phosphoglycolate is converted into glycolate by an enzyme in the ________.

Accepted Answer

A) peroxisome 
B) glyoxysome 
C) stroma 
D) thylakoid disk 
E) thylakoid membrane

Question 4

Organisms that use the radiant energy of the sun to convert carbon dioxide to organic molecules like carbohydrates and proteins are called _____.

Accepted Answer

A) chemoautotrophs 
B) chemoheterotrophs 
C) photoautotrophs 
D) photoheterotrophs 
E) didliotrophs

Question 5

In chloroplasts,a proton gradient is established with a higher concentration of protons found in the ______ and a lower concentration in the ______.

Accepted Answer

A) thylakoid lumen,intermembrane space 
B) intermembrane space,thylakoid lumen 
C) thylakoid lumen,stroma 
D) stroma,thylakoid lumen 
E) intermembrane space,matrix

Question 6

What enzyme is the first enzyme in the C4 Hatch-Slack pathway that carries CO2 into the bundle sheath cells?

Accepted Answer

A) Rubisco 
B) phosphenolpyruvate carboxylase 
C) pyruvate carboxylase 
D) phosphoenolpyruvate decarboxylase 
E) ATP synthase

Question 7

What metal atom is part of the chlorophyll porphyrin ring?

Accepted Answer

A) magnesium 
B) manganese 
C) platinum 
D) iron 
E) aluminum

Question 8

What substance is attached to RuBP by Rubisco to make 2-phosphoglycolate?

Accepted Answer

A) ATP 
B) O2 
C) CO2 
D) NADPH 
E) glycolate

Question 9

Which of the following is not a usual component found in the stroma?

Accepted Answer

A) tRNAs 
B) prokaryote-like ribosomes 
C) circular DNA 
D) linear DNA 
E) many different polypeptides

Question 10

What enzyme is responsible for fixing CO2 out of the atmosphere in C4 plants?

Accepted Answer

A) PEP decarboxylase 
B) ATP synthase 
C) PEP carboxylase 
D) Rubisco 
E) ribulose bisphosphate carboxylase

Question 11

Photosynthetic light absorption occurs in large pigment-protein complexes called __________.

Accepted Answer

A) pigmentoses 
B) pigmentosystems 
C) antennoids 
D) photoids 
E) photosystems

Question 12

A direct advantage of using water as an electron source for photosynthesis was that _________.

Accepted Answer

A) organisms could live in fewer habitats than they could previously 
B) organisms could get larger 
C) organisms were able to live in a much more diverse array of habitats 
D) organisms could be smaller 
E) organisms could be rehydrated more readily

Question 13

Starch stored as granules in the chloroplasts serves what purpose?

Accepted Answer

A) It causes plant cells to swell. 
B) It provides plants with sugars at night when light-dependent reactions are not possible. 
C) It provides plants with cellulose during the day. 
D) It supplies plants with ribulose bisphosphate. 
E) It causes plant cells to shrink.

Question 14

Which molecule conveys protons from the chloroplast stroma into the thylakoid lumen?

Accepted Answer

A) cytochrome b6f 
B) plastocyanin 
C) phytochrome 
D) cytochrome c 
E) oxygen

Question 15

Another investigator labels CO₂ with radiolabeled ¹⁸O.After exposure of a plant adapted to a hot,dry climate to the radiolabeled CO₂,in what molecule does the radiolabeled ¹⁸O appear?

Accepted Answer

The answer of Another investigator labels CO₂ with radiolabeled ¹⁸O.After...

Question 16

To what type of molecule does pheophytin pass its photoexcited electron?

Accepted Answer

A) theophyllin 
B) plastoquinone 
C) another pheophytin 
D) xanthophylls 
E) succinate dehydrogenase

Question 17

Flattened membranous structures that connect the thylakoids of different grana are known as ______.

Accepted Answer

A) grana thylakoids 
B) stroma thylakoids 
C) grana 
D) lumen 
E) stroma

Question 18

If water is labeled with ¹⁸O,where does the radiolabeled oxygen appear?

Accepted Answer

The answer of If water is labeled with ¹⁸O,where does...

Question 19

Organisms that depend on an external source of organic compounds are called _________.

Accepted Answer

A) autotrophs 
B) heterotrophs 
C) chemotrophs 
D) phototrophs 
E) externotrophs

Question 20

Which three organelles in a leaf are found closely associated with each other and cooperate with each other in such a way that products of one organelle serve as substrates in another?

Accepted Answer

A) peroxisomes,lysosomes,mitochondria 
B) chloroplasts,mitochondria,lysosomes 
C) chloroplasts,nuclei,mitochondria 
D) mitochondria,chloroplasts,peroxisomes 
E) chloroplasts,nuclei,peroxisomes

Exam 6: Photosynthesis and the Chloroplast

What metabolic process below do all eukaryotic green algae and higher plants have in common?

Why are plants unlikely to produce many carbohydrates at night?

2-phosphoglycolate is converted into glycolate by an enzyme in the ________.

Organisms that use the radiant energy of the sun to convert carbon dioxide to organic molecules like carbohydrates and proteins are called _____.

In chloroplasts,a proton gradient is established with a higher concentration of protons found in the and a lower concentration in the .

What enzyme is the first enzyme in the C₄ Hatch-Slack pathway that carries CO₂ into the bundle sheath cells?

What metal atom is part of the chlorophyll porphyrin ring?

What substance is attached to RuBP by Rubisco to make 2-phosphoglycolate?

Which of the following is not a usual component found in the stroma?

What enzyme is responsible for fixing CO₂ out of the atmosphere in C₄ plants?

Photosynthetic light absorption occurs in large pigment-protein complexes called __________.

A direct advantage of using water as an electron source for photosynthesis was that _________.

Starch stored as granules in the chloroplasts serves what purpose?

Which molecule conveys protons from the chloroplast stroma into the thylakoid lumen?

Another investigator labels CO₂ with radiolabeled ¹⁸O.After exposure of a plant adapted to a hot,dry climate to the radiolabeled CO₂,in what molecule does the radiolabeled ¹⁸O appear?

To what type of molecule does pheophytin pass its photoexcited electron?

Flattened membranous structures that connect the thylakoids of different grana are known as ______.

If water is labeled with ¹⁸O,where does the radiolabeled oxygen appear?

Organisms that depend on an external source of organic compounds are called _________.

Which three organelles in a leaf are found closely associated with each other and cooperate with each other in such a way that products of one organelle serve as substrates in another?

Exam 6: Photosynthesis and the Chloroplast

What metabolic process below do all eukaryotic green algae and higher plants have in common?

Why are plants unlikely to produce many carbohydrates at night?

2-phosphoglycolate is converted into glycolate by an enzyme in the ________.

Organisms that use the radiant energy of the sun to convert carbon dioxide to organic molecules like carbohydrates and proteins are called _____.

In chloroplasts,a proton gradient is established with a higher concentration of protons found in the ______ and a lower concentration in the ______.

What enzyme is the first enzyme in the C4 Hatch-Slack pathway that carries CO2 into the bundle sheath cells?

What metal atom is part of the chlorophyll porphyrin ring?

What substance is attached to RuBP by Rubisco to make 2-phosphoglycolate?

Which of the following is not a usual component found in the stroma?

What enzyme is responsible for fixing CO2 out of the atmosphere in C4 plants?

Photosynthetic light absorption occurs in large pigment-protein complexes called __________.

A direct advantage of using water as an electron source for photosynthesis was that _________.

Starch stored as granules in the chloroplasts serves what purpose?

Which molecule conveys protons from the chloroplast stroma into the thylakoid lumen?

Another investigator labels CO2 with radiolabeled 18O.After exposure of a plant adapted to a hot,dry climate to the radiolabeled CO2,in what molecule does the radiolabeled 18O appear?

To what type of molecule does pheophytin pass its photoexcited electron?

Flattened membranous structures that connect the thylakoids of different grana are known as ______.

If water is labeled with 18O,where does the radiolabeled oxygen appear?

Organisms that depend on an external source of organic compounds are called _________.

Which three organelles in a leaf are found closely associated with each other and cooperate with each other in such a way that products of one organelle serve as substrates in another?

In chloroplasts,a proton gradient is established with a higher concentration of protons found in the and a lower concentration in the .

What enzyme is the first enzyme in the C₄ Hatch-Slack pathway that carries CO₂ into the bundle sheath cells?

What enzyme is responsible for fixing CO₂ out of the atmosphere in C₄ plants?

Another investigator labels CO₂ with radiolabeled ¹⁸O.After exposure of a plant adapted to a hot,dry climate to the radiolabeled CO₂,in what molecule does the radiolabeled ¹⁸O appear?

If water is labeled with ¹⁸O,where does the radiolabeled oxygen appear?