1)According to the endosymbiont theory, which of the following organelles were o
ID: 204065 • Letter: 1
Question
1)According to the endosymbiont theory, which of the following organelles were once endosymbiotic prokaryotic organisms? a) Mitochondria and lysosomes b)Mitochondria and chloroplasts c)Chloroplasts and Golgi apparatus d)Golgi apparatus and ribosomes e)Ribosomes and lysosomes
2) Which of the following is not an argument for the theory that mitochondria and chloroplasts evolved from prokaryotic endosymbionts? a) Mitochondria and chloroplasts have double membranes b) Mitochondria and chloroplasts have their own ribosomes c) Mitochondria and chloroplasts have their own DNA d) The mitochondrial and chloroplast genomes are circular e) All of the above support the endosymbiotic theory
3) Taxol. a drug approved for treatment of breast cancer, prevents depolymerization of microtubules. what cellular function that affects cancer cells more than normal cells might taxol interfere with? a) maintaining cell shape b) cilia or flageila c) chromosome movements in cell division d) cell division (cleavage furrow formation) e) cytoplasmic streaming
4) The difference in the structures of animal cell extracellular matrix and plant cell walls reflects what fundamental difference(s) in their adaptive strategies? a) Animal cells must move more than plant cells. b) Animal cells have to be more responsive to changes their environment. c) Animal cells have to communicate with each other more than plant cell. d) all of the above
Explanation / Answer
1. b) Mitochondria and chloroplasts (Mitochondria and chloroplasts are about the same size as prokaryotic cells, have DNA and ribosomes, and are similar to those of bacterial ribosomes.)
2. e) All of the above support the endosymbiotic theory (Both the matrix and stromal spaces of these organelles does not contain many types of soluble proteins)
3. c) chromosome movements in cell division
4. a) Animal cells must move more than plant cells.
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