Which one of the following steps occurs during the multiplication of animal viruses, but not during the multiplication of bacteriophages?
A) assembly
B) biosynthesis
C) penetration
D) uncoating
Answer: D
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A BLAST search can be used for which of these applications?
A) to compare a nucleotide or amino acid sequence to databases from a variety of species B) to display the reading frame of a nucleotide sequence C) to determine whether a gene has an essential function in an organism D) to analyze microarray data E) to visualize the locations of all the genes on a single chromosome
Ureaplasma conserves energy and compensates for an absent electron transport chain by creating chemiosmotic energy gradients and ATP from the breakdown of ________ into ammonia/ammonium.
Fill in the blank(s) with the appropriate word(s).
The promotion of the lactose operon in
bacteria is a. activated by a repressor protein. b. independent of glucose concentration. c. activated by t lactose binding. d. regulated by RNA polymerase. e. none of these
The prebiotic soup hypothesis proposes that organic molecules formed from cracks in the ocean floor
______________ Indicate whether the statement is true or false.