Instruction(s Please attempt all questions 1. Which is NOT true of eukaryotic ce
ID: 162509 • Letter: I
Question
Instruction(s Please attempt all questions 1. Which is NOT true of eukaryotic cells? A. A true nucleus contains the chromosomes. B. Eukaryotic cells contain bounded compartments. c. They contain ribosomes that are smaller than those of prokaryotic cells. They all contain mitochondria. E. They contain many organelles in the cytoplasm. 2. Which of the following organisms can be considered a prokaryote? a. plants b. fungi c. bacteria. d. animals e. both B and C Which of the following is not found in a prokaryotic cell? a. DNA b. golgi apparatus c. plasma membrane d. ribosomes e, cell wall 4. Which of the following does not contain functional ribosomes? a. a otic cell b. a plant mitochondrion c. a chloroplast d. an animal mitochondrion e. a nucleolus. 5. Which of the following is NOT offered as evidence in support of the endosymbiotic theory, the belief that a eukaryotic cell has evolved as a committee" of prokaryotic cells? A. and are similar in size and structure to some species of bacteria. chloroplasts and mitochondria are similar to bacteria. cells and live B. The ribosomes of from eukaryotic c. Mitochondria and chloroplasts can actively break away on their own. DNA coding separate from the D. Mitochondria and chloroplasts have their own eukaryotic nucleus. theory. E. All of the choices offer support of the endosymbioticExplanation / Answer
.1. C .The ribosomes of eukaryotes are larger consisting of 60s subunit and smaller 40s sub unit which together form 80s particle having a mass of 4200 Kd. Where are in the prokaryotes it has 2700 kd mass.
2. C.Bacteria are prokaryotic cells Where are protozoans plants animals algae and fungi are Eukaryotic cells.
3. B Eukaryotic cells contain membrane bound organelles such as nucleus where as prokaryotic cells do not contain such organelles. Golgi apparatus is present in eukaryotes where as it is absent in prokaryotes.
4.E. Ribosomes are present in both eukaryotes and prokaryotes. All cells contain ribosomes because growth required the continued synthesis of new proteins there also found in mitochondria and chloroplast. Free ribosomes are found in cytosol but they are excluded from the cell nucleus.
5.E. Biologist margukis made this endosymbiosis in 1960. After this theory mitochondria and chloroplast have their cell membranes just like prokaryotic cells they have their own DNA just like bacteria and even multiply. Chloroplast are like green factories which can convert Solar energy into chemical energy and they also have similarities with mitochondria ,these evidences suggest that they are once free living bacteria.