Evidence indicating the chloroplasts were originally free-living prokaryotes that subsequently evolved a symbiotic relationship with a eukaryotic host includes all of the following except: Ability of chloroplasts to synthesize all their own proteins Presence of circular DNA in chloroplasts and in free-living prokaryotes Similarities of rRNA sequences between chloroplasts and free-living prokaryotes Similarities of structures between chloroplasts and some contemporary free-living prokaryotes O O O

Evidence indicating the chloroplasts were originally free-living prokaryotes that subsequently evolved a symbiotic relationship with a eukaryotic host includes all of the following except: Ability of chloroplasts to synthesize all their own proteins Presence of circular DNA in chloroplasts and in free-living prokaryotes Similarities of rRNA sequences between chloroplasts and free-living prokaryotes Similarities of structures between chloroplasts and some contemporary free-living prokaryotes O O O

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter13: Early Life Forms And The Viruses

Section: Chapter Questions

Problem 4CT

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The endosymbiotic hypothesis for the origin of chloroplasts from gram-negative prokaryotes is supported by all of the following lines of evidence except: the presence of enzymes for the light-dependent and the dark reactions of photosynthesis the presence of circular DNA resembling that of photosynthetic eubacteria the presence of mRNA, tRNA, and rRNA similar to that of the cyanobacteria their use of mitosis rather than binary fission during cell division the presence of 70s ribosomes, consisting of 30s and 50s ribosomal subunits
An endosymbiont is any organism that lives within the body or cells of another organism. Each would have performed mutually benefiting functions from their symbirie relationship. Why are the mitochondria considered an endosybiont in an eukaryotic cell ? They have two membranes have DNA sequences that indicate origin from the alpha- prroteobacteria has a means for using oxygen and create ATP can break down glucose for energy O They contain hydrolytic enzymes
According to the endosymbiotic theory, why did the primitive eukaryotic cell fail to digest the non-photosynthetic prokaryote that later became an energy-producing organelle? Because the engulfed cell provided the host cell with carbon dioxide. Because the host cell was able to survive anaerobic conditions with the engulfed cell alive. Because the engulfed cell allowed the host cell to metabolize glucose. Because the engulfed cell provided the host cell with adenosine triphosphate (ATP).
What features of mitochondria are similar to bacteria? Select all that apply. Independent movement Membrane-bound ribosomes Circular DNA similar to plasmids Cellular machinery for photosynthesis
prokaryote is characterized by dispersed dna and lack of membrane bound organelle abesence of nuclear envelope abesence of nucleus all of these
Which of the following are lines of evidence for endosymbiosis? Inner membranes are similar to plasma membranes of prokaryotes O DNA structure in chloroplasts and mitochondria are similar to that of prokaryotes Mitochondrial ribosomes are more similar to prokaryotic than eukaryotic ribosomes O The DNA found in the nucleus of a eukaryotic cell is very similar to that of prokaryotes.
Which of the following is a possible characteristic of prokaryotic and eukaryotic cells? O peptidoglycan O linear DNA O pseudomurein O photosynthetic membrane system O plasmids
Bacteriorhodopsin, and retinal, are part of a transmembrane complex that uses of sunlight to create a proton gradient, for synthesis of ATP from ADP, in which of the following organisms? one of the members of the Archaeobacterial kingdom one of the members of the Eubacterial kingdom (ancestral to the mitochondria) one of the members of the Animal kingdom one of the members of the Eubacterial kingdom (ancestral to the chloroplasts) one of the members of the Plant kingdom
Which of the following pieces of evidence could support the endosymbiotic theory if found to be true? Traces of peptidoglycan in the cytoplasm in eukaryotes Presence of rRNA in eukaryotes Presence of 80S ribosomes in eukaryotes The discovery of a unicellular eukaryote
After the glacial retreat at the end of the last ice age, some three-spine stickleback fish (Gasterosteus aculeatus) were isolated in small lakes. A mutation occurred in these fish that resulted in the loss of pelvic spines. Today, all freshwater sticklebacks lack pelvic spines, but are still classified as members of the same species as marine sticklebacks. Scientists collected sticklebacks from both marine and freshwater environments and placed them together in a controlled environment. Which of the following statements describes the effect of the mutation on their ability to interbreed? They should be able to interbreed and produce fertile offspring. They will not be able to interbreed and produce offspring because of hybrid breakdown. They will not be able to interbreed and produce offspring because of mechanical isolation. They should be able to interbreed and produce offspring, but the offspring may experience reduced hybrid fertility.
In cyanobacteria, nitrogen fixation takes places in specialized cells called heterocysts nitrospores Othylakoids Ochloroplasts
The non-protein component of the transmembrane complex used by the salt-loving archaeobacterium Halobacterium halobium, which uses sunlight to create a proton gradient for ATP synthesis, is called: bacteriochlorophyll chlorophyll bacteriorhodopsin retinal cytochrome c