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Based on your knowledge about eukaryotic evolution, all of these statements about the evolution of mitochondria...
Classify the statements below as to whether they describe mitochondria, chloroplasts, or both. Cannot live independently...
Classify the statements below as to whether they describe mitochondria, chloroplasts, or both. Cannot live independently because they require some proteins and RNAS encoded by nuclear genes. In some species, some codons specify a different amino acid than is specified in the universal genetic code. Translation is inhibited by chemicals known to inhibit bacterial translation, such as chloramphenicol Carry genes for some of the enzymes of photosynthetic electron transport. rRNA gene sequences are most similar to cyanobacteria. May have arisen...
5. Mitochondria and chloroplasts were once free-living bacteria that later migrated into eukaryotic cells. Mitochondria...
5. Mitochondria and chloroplasts were once free-living bacteria that later migrated into eukaryotic cells. Mitochondria make energy while chloroplasts prepare their own food. a) If Gregor Mendel were a molecular biologist and laid his hands on a free-living mitochondrion, would he have got his 3:1 ratio crossing two mitochondria? b) In its free-living condition, can a chloroplast code for proteins, and if yes, what are the two most important enzymes that aid in its survival? c) After endosymbiosis, what happenned...
Classify each statement as to whether it represents a piece of evidence that supports the endosymbiont...
Classify each statement as to whether it represents a piece of evidence that supports the endosymbiont theory of the evolution of mitochondria and chloroplasts from prokaryotes. Some organellar genes have migrated to the nucleus. Evidence for the endosymbiont theory Does not support endosymbiont theory Some organelle proteins are encoded in the nucleus. Organelles do not have flagella. Mitochondrial rRNA genes are most similar to the rRNA gene of a bacterium. Organelle translation is inhibited by antibiotics that inhibit prokaryotic translation...
4. Development of organelles Aa Aa 3 Modern eukaryotic cells are very complex and have many...
4. Development of organelles Aa Aa 3 Modern eukaryotic cells are very complex and have many features that allow them to function efficiently. These complexities took a very, very long time to evolve and likely progressed as a series of small improvements that were naturally selected. For example, modern eukaryotic cells have internal membranes surrounding their organelles and the nucleus. This arrangement likely arose when the cellular membranes of some ancient bacterial cells accidentally folded to become internal membranes. Which...
How is compartmentalization achieved in eukaryotic cells? Select one: a. Primarily by membrane-bound structures O b....
How is compartmentalization achieved in eukaryotic cells? Select one: a. Primarily by membrane-bound structures O b. Primarily by endosymbiosis O c. Primarily by cellular structures surrounded by protein O d. Primarily be the cytoskeleton, which divides the cell into different domains for different functions. A mutation to DNA polymerase III that eliminated the 3'-to-5' exonuclease activity would prevent: Select one: O a. removal of the RNA primer. O b.removal of base mismatches. O c. addition of dNTPs to a region...
24. Of all the evidence that the mitochondria of eukaryotic cells is derived from endosymbiosis which...
24. Of all the evidence that the mitochondria of eukaryotic cells is derived from endosymbiosis which it the most important? Select one: a. Their inner membrane resembles the composition of those found in many bacteria b. They have two membranes c. Single circular chromosome d. Their ribosomes are the 70S form that are found in all bacteria e. Their DNA has sequences unique to bacteria 25. Which of the following pairs is mismatched? Select one: a. 70S and 50S b....
Due to gene transfer between the organelles and the nucleus, Multiple Choice a chloroplast from one...
Due to gene transfer between the organelles and the nucleus, Multiple Choice a chloroplast from one plant species can be transferred to any other plant species. organelle genomes experience lower rates of mutation than they would if gene transfer did not occur. some proteins must be imported into organelles for their function mitochondria and chloroplasts have genes that allow them to live independently. mitochondrial genomes in all species have the same genes. What does DNA sequencing suggest about the relationship...
1. All the following statements about mitochondria are true except: A. protons are concentrated in the...
1. All the following statements about mitochondria are true except: A. protons are concentrated in the mitochondrial matrix. B. the inner membrane contains proteins for the electron transport chain. C. ATP is produced in the mitochondrial matrix. D. ATP synthase allows the proton gradient to dissipate. E. pyruvate is found in the mitochondria.
42. Which statement is NOT true about DNA? a) DNA acts like an enzyme by binding...
42. Which statement is NOT true about DNA? a) DNA acts like an enzyme by binding amino acids together using dehydration synthesis. b) Before cells divide both strands must be copied and one is provided for each new cell cm RNA is copied from a piece of DNA termed a gene. d) DNA is not always copied perfectly. Mistakes, mutations, occur and result in changed proteins, e) DNA functions as code for the synthesis of proteins. 43. A section of...
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have...
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
Classify the statements below as to whether they describe mitochondria, chloroplasts, or both. Cannot live independently because they require some proteins and RNAS encoded by nuclear genes. In some species, some codons specify a different amino acid than is specified in the universal genetic code. Translation is inhibited by chemicals known to inhibit bacterial translation, such as chloramphenicol Carry genes for some of the enzymes of photosynthetic electron transport. rRNA gene sequences are most similar to cyanobacteria. May have arisen...
Classify each statement as to whether it represents a piece of evidence that supports the endosymbiont theory of the evolution of mitochondria and chloroplasts from prokaryotes. Some organellar genes have migrated to the nucleus. Evidence for the endosymbiont theory Does not support endosymbiont theory Some organelle proteins are encoded in the nucleus. Organelles do not have flagella. Mitochondrial rRNA genes are most similar to the rRNA gene of a bacterium. Organelle translation is inhibited by antibiotics that inhibit prokaryotic translation...
4. Development of organelles Aa Aa 3 Modern eukaryotic cells are very complex and have many features that allow them to function efficiently. These complexities took a very, very long time to evolve and likely progressed as a series of small improvements that were naturally selected. For example, modern eukaryotic cells have internal membranes surrounding their organelles and the nucleus. This arrangement likely arose when the cellular membranes of some ancient bacterial cells accidentally folded to become internal membranes. Which...
How is compartmentalization achieved in eukaryotic cells? Select one: a. Primarily by membrane-bound structures O b. Primarily by endosymbiosis O c. Primarily by cellular structures surrounded by protein O d. Primarily be the cytoskeleton, which divides the cell into different domains for different functions. A mutation to DNA polymerase III that eliminated the 3'-to-5' exonuclease activity would prevent: Select one: O a. removal of the RNA primer. O b.removal of base mismatches. O c. addition of dNTPs to a region...
24. Of all the evidence that the mitochondria of eukaryotic cells is derived from endosymbiosis which it the most important? Select one: a. Their inner membrane resembles the composition of those found in many bacteria b. They have two membranes c. Single circular chromosome d. Their ribosomes are the 70S form that are found in all bacteria e. Their DNA has sequences unique to bacteria 25. Which of the following pairs is mismatched? Select one: a. 70S and 50S b....
Due to gene transfer between the organelles and the nucleus, Multiple Choice a chloroplast from one plant species can be transferred to any other plant species. organelle genomes experience lower rates of mutation than they would if gene transfer did not occur. some proteins must be imported into organelles for their function mitochondria and chloroplasts have genes that allow them to live independently. mitochondrial genomes in all species have the same genes. What does DNA sequencing suggest about the relationship...
42. Which statement is NOT true about DNA? a) DNA acts like an enzyme by binding amino acids together using dehydration synthesis. b) Before cells divide both strands must be copied and one is provided for each new cell cm RNA is copied from a piece of DNA termed a gene. d) DNA is not always copied perfectly. Mistakes, mutations, occur and result in changed proteins, e) DNA functions as code for the synthesis of proteins. 43. A section of...
Question 78 Which of the following statements about the cytoskeleton is TRUE? All eukaryotic cells have actin, microtubules, and intermediate filaments in their cytoplasm The cytoskeleton provides a rigid and unchangeable structure important for the shape of the cell. The three cytoskeletal filaments perform distinct tasks in the cell and act completely independently of one another Actin filaments and microtubules have an inherent polarity, with a plus end that grows more quickly than the minus end С. D Question 79...
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