What effect does the sigma factor have on how the RNA polymerase binds to DNA?
What will be an ideal response?
Ans: Sigma factor binding gives holoenzyme a drastically reduced ability to bind random DNA sequences and confers the ability to recognize specific binding sites.
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Which of the following is NOT true of enzyme
behavior?
a. Enzyme shape may change during catalysis. b. The active site of an enzyme orients its substrate molecules, thereby promoting interaction of their reactive parts. c. All enzymes have an active site where substrates are temporarily bound. d. Each enzyme can catalyze a wide variety of different reactions. e. Enzymes make reactions occur at a faster rate.
Which of the following represents an example
of climate?
a. July 20, 1930 was the hottest day on record in Washington, DC b. April 14th, 1921 Silver Lake, Colorado received 1.7 meters of snow c. the rainfall in Seattle, Washington on July 4, 2010 was 2 centimeters d. the average summer temperature in Miami, Florida is 27 Celsius e. none of these are an example of climate
Which of the following statements is true?
a. Mosses have xylem b. Mosses have lignin. c. Mosses have true stems. d. Mosses have rhizoids. e. Mosses have independent sporophytes
An organism with a genome size of n = 23 experienced a Robertsonian translocation. How many chromosomes would you expect to see in the karyotype of a somatic cell in an affected individual?
A) 21 B) 25 C) 42 D) 44 E) 46