Which of the following sequences or molecules is LEAST relevant to the assembly of the basal transcription apparatus for transcription?
A. core promoter
B. general transcription factors
C. RNA polymerase
D. TATA box
E. enhancer
Ans: E. enhancer
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Which tissue will NOT be crushed or sloughed off
by the growing of the stem? a. vascular cambium b. epidermis c. cortex d. pith e. endodermis
Hereditary information is encoded in a single, circular DNA molecule in most prokaryotes. What is another feature of the prokaryotic hereditary information?
a. The bacterial chromosomes do not have genes that control binary fission. b. Bacterial cells cannot replicate their DNA very rapidly. c. Bacterial cells do not utilize a mitotic spindle to segregate their replicated DNA. d. The DNA of the bacterial chromosome is not replicated prior to segregation.
Salmon eggs hatch in freshwater. The fish then migrate to the ocean (a hypertonic solution) and, after several years of feeding and growing, return to freshwater to breed
How can these organisms make the transition from freshwater to ocean water and back to freshwater? A) The rectal gland functions in the ocean water, and chloride cells function in freshwater. B) Different gill cells are involved in osmoregulation in freshwater than in salt water. C) Salmon in freshwater excrete dilute urine, and salmon in salt water secrete concentrated urine. D) Their metabolism changes in salt water to degrade electrolytes.
In what stage of the cell cycle is a cell's DNA copied?