Question 1

Where in mitochondria does each of the following processes or events occur?
-Oxidative phosphorylation of ATP

Accepted Answer

The inner

Question 2

A mitochondrial matrix protein is maintained in its unfolded state by an Hsp70 chaperone protein before transport across the mitochondrial membrane.

Accepted Answer

A) True 
 B)False

Question 3

Translocase proteins such as Toc have channels that are just barely wider than a single amino acid. Since most mature proteins have significant secondary and tertiary structure, how do they fit through the narrow channels of these translocases?

Accepted Answer

Maturely formed proteins are much wider

Question 4

Where does the energy for phosphate transfer across the mitochondrial inner membrane to the matrix come from?

Accepted Answer

A proton g

Question 5

Which compound is a product of glycolysis that is transported into the mitochondria?

Accepted Answer

A)  Pyruvate 
B)  Acetate as acetyl CoA 
C)  Lactic acid 
D)  Citric acid 
A)  Pyruvate 
B)  Acetate as acetyl CoA 
C)  Lactic acid 
D)  Citric acid

Question 6

Zellweger syndrome is caused by defects in genes coding for peroxisomal protein import. Why are defects in such genes more likely to be lethal than a defect in a gene encoding a single enzyme present in the peroxisomal lumen?

Accepted Answer

A defect in import machinery affects the

Question 7

Carotenoids are stored in

Accepted Answer

A)  chloroplasts. 
B)  chromoplasts. 
C)  amyloplasts. 
D)  elaioplasts. 
A)  chloroplasts. 
B)  chromoplasts. 
C)  amyloplasts. 
D)  elaioplasts.

Question 8

Chloroplast tRNAs translate

Accepted Answer

A)  all mRNA codons according to the universal code. 
B)  all the amino acids according to the universal code but have different stop codons. 
C)  some codons as amino acids that differ from the universal code but use the same stop codons. 
D)  some codons as amino acids that differ from the universal code and use some different stop codons. 
A)  all mRNA codons according to the universal code. 
B)  all the amino acids according to the universal code but have different stop codons. 
C)  some codons as amino acids that differ from the universal code but use the same stop codons. 
D)  some codons as amino acids that differ from the universal code and use some different stop codons.

Question 9

Most mitochondrial genomes consist of

Accepted Answer

A)  a single linear DNA molecule. 
B)  several linear DNA molecules. 
C)  several circular DNA molecules. 
D)  a single circular DNA molecule. 
A)  a single linear DNA molecule. 
B)  several linear DNA molecules. 
C)  several circular DNA molecules. 
D)  a single circular DNA molecule.

Question 10

Once through the Toc complex in the outer membrane of the chloroplast, proteins are transferred to the _______ in the inner membrane.

Accepted Answer

The answer of Once through the Toc complex in the...

Question 11

Explain the role of endosymbiosis in the evolution of mitochondria and chloroplasts.

Accepted Answer

Because of the prokaryotic nature of the

Question 12

Zellweger syndrome is caused by a defect in

Accepted Answer

A)  mitochondrial protein import. 
B)  the electron transport system in mitochondria. 
C)  protein import into peroxisomes. 
D)  the synthesis of peroxisomal proteins. 
A)  mitochondrial protein import. 
B)  the electron transport system in mitochondria. 
C)  protein import into peroxisomes. 
D)  the synthesis of peroxisomal proteins.

Question 13

All plant plastids contain the same genome as chloroplasts. However, chromoplasts, amyloplasts, and elaioplasts are clearly different from one another. What mechanism might explain the differences between these plastids that all have the same internal genes?

Accepted Answer

Plastid development is under the coordin

Question 14

Which of the following plastids is a precursor to all other plastids?

Accepted Answer

A)  Chromoplast 
B)  Proplastid 
C)  Etioplast 
D)  Amyloplast 
A)  Chromoplast 
B)  Proplastid 
C)  Etioplast 
D)  Amyloplast

Question 15

The import of mitochondrial matrix proteins from the cytoplasm requires

Accepted Answer

A)  an electrochemical gradient across the inner membrane. 
B)  a potassium gradient across the inner membrane. 
C)  ATP and a proton gradient across the inner membrane. 
D)  ATP and a potassium gradient across the inner membrane. 
A)  an electrochemical gradient across the inner membrane. 
B)  a potassium gradient across the inner membrane. 
C)  ATP and a proton gradient across the inner membrane. 
D)  ATP and a potassium gradient across the inner membrane.

Question 16

The human mitochondrial genome encodes only 22 tRNAs. This limited array of tRNAs can read the 64 possible triplet codons through extreme wobble in base pairing at the third codon position and the use of a(n) _______ genetic code.

Accepted Answer

A)  chloroplast-mitochondrial-specific 
B)  nonuniversal mitochondrial 
C)  peroxisomal-mitochondrial-specific 
D)  universal 
A)  chloroplast-mitochondrial-specific 
B)  nonuniversal mitochondrial 
C)  peroxisomal-mitochondrial-specific 
D)  universal

Question 17

The transport of proteins across the outer and inner chloroplast membranes occurs through complexes called

Accepted Answer

A)  Tim and Tom. 
B)  Tic and Toc. 
C)  Sec and Tat. 
D)  import complexes. 
A)  Tim and Tom. 
B)  Tic and Toc. 
C)  Sec and Tat. 
D)  import complexes.

Question 18

Mitochondria contain

Accepted Answer

A)  no genes of their own. 
B)  genes for mitochondrial proteins. 
C)  genes for mitochondrial proteins and rRNAs. 
D)  genes for mitochondrial proteins, rRNAs, and tRNAs. 
A)  no genes of their own. 
B)  genes for mitochondrial proteins. 
C)  genes for mitochondrial proteins and rRNAs. 
D)  genes for mitochondrial proteins, rRNAs, and tRNAs.

Question 19

The inner compartment of mitochondria is called the

Accepted Answer

A)  stroma. 
B)  intermembrane space. 
C)  inner membrane space. 
D)  matrix. 
A)  stroma. 
B)  intermembrane space. 
C)  inner membrane space. 
D)  matrix.

Question 20

The citric acid cycle consists of the oxidation of _______ to produce _______.

Accepted Answer

A)  pyruvate; CO2, NADH, and FADH2 
B)  acetyl CoA; CO2, NADH, and FADH2 
C)  pyruvate; CO2 
D)  pyruvate; NADH and FADH2 
A)  pyruvate; CO2, NADH, and FADH2 
B)  acetyl CoA; CO2, NADH, and FADH2 
C)  pyruvate; CO2 
D)  pyruvate; NADH and FADH2

Where in mitochondria does each of the following processes or events occur? -Oxidative phosphorylation of ATP

A mitochondrial matrix protein is maintained in its unfolded state by an Hsp70 chaperone protein before transport across the mitochondrial membrane.

Translocase proteins such as Toc have channels that are just barely wider than a single amino acid. Since most mature proteins have significant secondary and tertiary structure, how do they fit through the narrow channels of these translocases?

Where does the energy for phosphate transfer across the mitochondrial inner membrane to the matrix come from?

Which compound is a product of glycolysis that is transported into the mitochondria?

Zellweger syndrome is caused by defects in genes coding for peroxisomal protein import. Why are defects in such genes more likely to be lethal than a defect in a gene encoding a single enzyme present in the peroxisomal lumen?

Carotenoids are stored in

Chloroplast tRNAs translate

Most mitochondrial genomes consist of

Once through the Toc complex in the outer membrane of the chloroplast, proteins are transferred to the _______ in the inner membrane.

Explain the role of endosymbiosis in the evolution of mitochondria and chloroplasts.

Zellweger syndrome is caused by a defect in

All plant plastids contain the same genome as chloroplasts. However, chromoplasts, amyloplasts, and elaioplasts are clearly different from one another. What mechanism might explain the differences between these plastids that all have the same internal genes?

Which of the following plastids is a precursor to all other plastids?

The import of mitochondrial matrix proteins from the cytoplasm requires

The human mitochondrial genome encodes only 22 tRNAs. This limited array of tRNAs can read the 64 possible triplet codons through extreme wobble in base pairing at the third codon position and the use of a(n) _______ genetic code.

The transport of proteins across the outer and inner chloroplast membranes occurs through complexes called

Mitochondria contain

The inner compartment of mitochondria is called the

The citric acid cycle consists of the oxidation of _ to produce _.

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

Exam 13: Mitochondria, Chloroplasts, and Peroxisomes

Where in mitochondria does each of the following processes or events occur? -Oxidative phosphorylation of ATP

A mitochondrial matrix protein is maintained in its unfolded state by an Hsp70 chaperone protein before transport across the mitochondrial membrane.

Translocase proteins such as Toc have channels that are just barely wider than a single amino acid. Since most mature proteins have significant secondary and tertiary structure, how do they fit through the narrow channels of these translocases?

Where does the energy for phosphate transfer across the mitochondrial inner membrane to the matrix come from?

Which compound is a product of glycolysis that is transported into the mitochondria?

Zellweger syndrome is caused by defects in genes coding for peroxisomal protein import. Why are defects in such genes more likely to be lethal than a defect in a gene encoding a single enzyme present in the peroxisomal lumen?

Carotenoids are stored in

Chloroplast tRNAs translate

Most mitochondrial genomes consist of

Once through the Toc complex in the outer membrane of the chloroplast, proteins are transferred to the _______ in the inner membrane.

Explain the role of endosymbiosis in the evolution of mitochondria and chloroplasts.

Zellweger syndrome is caused by a defect in

All plant plastids contain the same genome as chloroplasts. However, chromoplasts, amyloplasts, and elaioplasts are clearly different from one another. What mechanism might explain the differences between these plastids that all have the same internal genes?

Which of the following plastids is a precursor to all other plastids?

The import of mitochondrial matrix proteins from the cytoplasm requires

The human mitochondrial genome encodes only 22 tRNAs. This limited array of tRNAs can read the 64 possible triplet codons through extreme wobble in base pairing at the third codon position and the use of a(n) _______ genetic code.

The transport of proteins across the outer and inner chloroplast membranes occurs through complexes called

Mitochondria contain

The inner compartment of mitochondria is called the

The citric acid cycle consists of the oxidation of _______ to produce _______.

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

The citric acid cycle consists of the oxidation of _ to produce _.