Question 1

An amyloplast is a plastid that

Accepted Answer

A)  stores starch. 
B)  stores lipid. 
C)  is arrested in chloroplast development by lack of light. 
D)  stores pigment. 
A)  stores starch. 
B)  stores lipid. 
C)  is arrested in chloroplast development by lack of light. 
D)  stores pigment. A

Question 2

The mitochondrial outer membrane contains channels composed of proteins called

Accepted Answer

A)  porins. 
B)  aquaporins. 
C)  connexins. 
D)  claudins. 
A)  porins. 
B)  aquaporins. 
C)  connexins. 
D)  claudins. A

Question 3

The proteins encoded by the human mitochondrial genome function in

Accepted Answer

A)  mitochondrial ribosomes. 
B)  mitochondrial DNA polymerases. 
C)  respiratory complexes and oxidative phosphorylation. 
D)  helicases. 
A)  mitochondrial ribosomes. 
B)  mitochondrial DNA polymerases. 
C)  respiratory complexes and oxidative phosphorylation. 
D)  helicases. C

Question 4

Which of the following is not involved in the initial transport of a protein across the mitochondrial outer membrane from the cytosol?

Accepted Answer

A)  Hsp70 
B)  Tim23 
C)  Tom 
D)  ATP 
A)  Hsp70 
B)  Tim23 
C)  Tom 
D)  ATP

Question 5

New peroxisomes form by

Accepted Answer

A)  budding from the Golgi apparatus. 
B)  budding from preexisting peroxisomes. 
C)  de novo assembly from proteins synthesized in the cytosol. 
D)  budding of vesicles from the ER and growth and division of preexisting peroxisomes. 
A)  budding from the Golgi apparatus. 
B)  budding from preexisting peroxisomes. 
C)  de novo assembly from proteins synthesized in the cytosol. 
D)  budding of vesicles from the ER and growth and division of preexisting peroxisomes.

Question 6

Chloroplasts contain their own genetic system, reflecting their evolutionary origins from photosynthetic _______.

Accepted Answer

The answer of Chloroplasts contain their own genetic system, reflecting...

Question 7

What is the major site of energy production in the form of ATP in human cells?

Accepted Answer

A)  The mitochondrial matrix 
B)  The cytoplasm 
C)  The outer mitochondrial membrane 
D)  The inner mitochondrial membrane 
A)  The mitochondrial matrix 
B)  The cytoplasm 
C)  The outer mitochondrial membrane 
D)  The inner mitochondrial membrane

Question 8

Most mitochondrial phospholipids are synthesized in the

Accepted Answer

A)  mitochondrial matrix. 
B)  mitochondrial intermembrane space. 
C)  ER. 
D)  Golgi apparatus. 
A)  mitochondrial matrix. 
B)  mitochondrial intermembrane space. 
C)  ER. 
D)  Golgi apparatus.

Question 9

The process by which mitochondria are thought to have arisen during evolution is called

Accepted Answer

A)  symbiosis. 
B)  phagocytosis. 
C)  endosymbiosis. 
D)  pinocytosis. 
A)  symbiosis. 
B)  phagocytosis. 
C)  endosymbiosis. 
D)  pinocytosis.

Question 10

Chloroplasts differ from mitochondria in that chloroplasts

Accepted Answer

A)  do not generate ATP. 
B)  do not originate by endosymbiosis. 
C)  do not replicate by division. 
D)  synthesize their own amino acids and fatty acids. 
A)  do not generate ATP. 
B)  do not originate by endosymbiosis. 
C)  do not replicate by division. 
D)  synthesize their own amino acids and fatty acids.

Question 11

Chloroplasts are similar to mitochondria in that both

Accepted Answer

A)  have a porous outer membrane. 
B)  contain light sensitive pigments. 
C)  require presequence amino acids on proteins for import. 
D)  require folded cristae as the site of electron transport. 
A)  have a porous outer membrane. 
B)  contain light sensitive pigments. 
C)  require presequence amino acids on proteins for import. 
D)  require folded cristae as the site of electron transport.

Question 12

Which of the following is not involved in targeting a protein from the intermembrane space into the inner mitochondrial membrane?

Accepted Answer

A)  Tim9 
B)  Tim10 
C)  Tim22 
D)  Tom 
A)  Tim9 
B)  Tim10 
C)  Tim22 
D)  Tom

Question 13

Explain the functions of mitochondrial matrix processing peptidase (MPP) and chloroplast stromal processing peptidase (SPP).

Accepted Answer

Peptidases cleave peptide bonds in polyp

Question 14

Most small molecules are permeable across

Accepted Answer

A)  both mitochondrial membranes. 
B)  the inner, but not the outer, mitochondrial membrane. 
C)  the outer, but not the inner, mitochondrial membrane. 
D)  neither mitochondrial membrane. 
A)  both mitochondrial membranes. 
B)  the inner, but not the outer, mitochondrial membrane. 
C)  the outer, but not the inner, mitochondrial membrane. 
D)  neither mitochondrial membrane.

Question 15

In addition to _______ from the ER, new peroxisomes can be formed by the growth and division of old peroxisomes.

Accepted Answer

The answer of In addition to _______ from the ER,...

Question 16

Mitochondrial targeting presequences usually consist of a

Accepted Answer

A)  hydrophobic $\alpha$ helix. 
B)  hydrophobic random chain. 
C)  negatively charged $\alpha$ helix. 
D)  positively charged $\alpha$ helix. 
A)  hydrophobic $\alpha$ helix. 
B)  hydrophobic random chain. 
C)  negatively charged $\alpha$ helix. 
D)  positively charged $\alpha$ helix.

Question 17

Mitochondrial inner membrane single-pass transmembrane proteins are inserted into the inner membrane

Accepted Answer

A)  through a transporter called Oxa translocase. 
B)  through Tim. 
C)  through Tim and Tom. 
D)  directly from the matrix into the lipid bilayer. 
A)  through a transporter called Oxa translocase. 
B)  through Tim. 
C)  through Tim and Tom. 
D)  directly from the matrix into the lipid bilayer.

Question 18

Mitochondrial and chloroplast proteins are synthesized on

Accepted Answer

A)  ER ribosomes. 
B)  free cytosolic ribosomes. 
C)  the Golgi apparatus. 
D)  peroxisomes. 
A)  ER ribosomes. 
B)  free cytosolic ribosomes. 
C)  the Golgi apparatus. 
D)  peroxisomes.

Question 19

Most peroxisomal proteins are synthesized on

Accepted Answer

A)  free ribosomes in the cytosol. 
B)  RER membranes in the cytoplasm. 
C)  ribosomes bound to the outer peroxisome membrane. 
D)  ribosomes inside the peroxisome. 
A)  free ribosomes in the cytosol. 
B)  RER membranes in the cytoplasm. 
C)  ribosomes bound to the outer peroxisome membrane. 
D)  ribosomes inside the peroxisome.

Question 20

In mitochondria, the pH of the matrix is higher than the pH of the intermembrane space.

Accepted Answer

A) True 
 B)False

An amyloplast is a plastid that

The mitochondrial outer membrane contains channels composed of proteins called

The proteins encoded by the human mitochondrial genome function in

Which of the following is not involved in the initial transport of a protein across the mitochondrial outer membrane from the cytosol?

New peroxisomes form by

Chloroplasts contain their own genetic system, reflecting their evolutionary origins from photosynthetic _______.

What is the major site of energy production in the form of ATP in human cells?

Most mitochondrial phospholipids are synthesized in the

The process by which mitochondria are thought to have arisen during evolution is called

Chloroplasts differ from mitochondria in that chloroplasts

Chloroplasts are similar to mitochondria in that both

Which of the following is not involved in targeting a protein from the intermembrane space into the inner mitochondrial membrane?

Explain the functions of mitochondrial matrix processing peptidase (MPP) and chloroplast stromal processing peptidase (SPP).

Most small molecules are permeable across

In addition to _______ from the ER, new peroxisomes can be formed by the growth and division of old peroxisomes.

Mitochondrial targeting presequences usually consist of a

Mitochondrial inner membrane single-pass transmembrane proteins are inserted into the inner membrane

Mitochondrial and chloroplast proteins are synthesized on

Most peroxisomal proteins are synthesized on

In mitochondria, the pH of the matrix is higher than the pH of the intermembrane space.

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Genes and Genomes

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

The Cytoskeleton and Cell Movement

The Plasma Membrane

Cell Walls, the Extracellular Matrix, and Cell Interactions

Cell Signaling

The Cell Cycle

Cell Death and Cell Renewal

Cancer

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Exam 13: Mitochondria, Chloroplasts, and Peroxisomes

An amyloplast is a plastid that

The mitochondrial outer membrane contains channels composed of proteins called

The proteins encoded by the human mitochondrial genome function in

Which of the following is not involved in the initial transport of a protein across the mitochondrial outer membrane from the cytosol?

New peroxisomes form by

Chloroplasts contain their own genetic system, reflecting their evolutionary origins from photosynthetic _______.

What is the major site of energy production in the form of ATP in human cells?

Most mitochondrial phospholipids are synthesized in the

The process by which mitochondria are thought to have arisen during evolution is called

Chloroplasts differ from mitochondria in that chloroplasts

Chloroplasts are similar to mitochondria in that both

Which of the following is not involved in targeting a protein from the intermembrane space into the inner mitochondrial membrane?

Explain the functions of mitochondrial matrix processing peptidase (MPP) and chloroplast stromal processing peptidase (SPP).

Most small molecules are permeable across

In addition to _______ from the ER, new peroxisomes can be formed by the growth and division of old peroxisomes.

Mitochondrial targeting presequences usually consist of a

Mitochondrial inner membrane single-pass transmembrane proteins are inserted into the inner membrane

Mitochondrial and chloroplast proteins are synthesized on

Most peroxisomal proteins are synthesized on

In mitochondria, the pH of the matrix is higher than the pH of the intermembrane space.

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Genes and Genomes

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

The Cytoskeleton and Cell Movement

The Plasma Membrane

Cell Walls, the Extracellular Matrix, and Cell Interactions

Cell Signaling

The Cell Cycle

Cell Death and Cell Renewal

Cancer

Filters