What properties must a substance possess in order to serve as the genetic material? Select all that apply.A) It must consist of many different types of subunits in order to code for the large variety of characteristics of a living organism.B) It must be able to store information that pertains to the development,structure, and metabolic activities of the cell or organism.C) It must be stable, so that it can be replicated with high accuracy during cell division and be transmitted from generation to generation.D) It must be able to catalyze chemical reactions at very high speeds in order to direct the metabolic activities of the cell.E) It must be able to undergo rare changes, called mutations, that provide the genetic variability required for evolution to occur.
What will be an ideal response?
B, C, E
In order to serve as the genetic material of a cell, the substance must be able to store information that pertains to the development, structure, and metabolic activities of the cell or organism. It must also be stable, so that it can be replicated with high accuracy during cell division and be transmitted from generation to generation. Finally, the substance must be able to undergo rare changes, called mutations, that provide the genetic variability required for evolution to occur.
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Which of the following statements about ozone depletion are true? Check all that apply.
_____ Concentrations of ozone-depleting chemicals continue to rise in the atmosphere. _____ Chlorofluorocarbons (CFCs) are the major cause of ozone depletion. _____ Free chlorine in the upper atmosphere catalyzes the conversion of O3 into O2. _____ Weather conditions also influence the size of the ozone hole in the stratosphere. _____ CFCs are acted on by conditions in the stratosphere to form diatomic chlorine (Cl2).
During this initial period of division in a zygote, there is no increase in the overall size of the embryo.
A. Mitosis B. Cleavage C. Meiosis D. Fertilization
The Golgi apparatus is responsible for the
A. replication of chromosomes. B. the assembly of ribosomes. C. packaging of materials for excretion. D. formation of mesosomes.
A faster than normal heart rate is called
a. tachycardia. b. bradycardia. c. hypocardia. d. hypercardia. e. bradykinin.