Which of the following would occur from a mutation in the gene's promoter region?
A. The sequence of the mature mRNA would change.
B. The ability of pre-mRNA to be properly spliced would change.
C. The ability of mRNA to be translationally regulated would change.
D. The amino acid sequence of the translated protein would be altered.
E. The rate of transcription may increase or decrease.
E. The rate of transcription may increase or decrease.
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In a sunflower population, a mutation arises that results in vessels 4à— wider than wild-type. The mutants will have _________ water-transport capacity, but will also be more susceptible to _________
A. higher; cavitation from freezing B. higher; cavitation from air leaks C. higher; conduit collapse D. lower; cavitation from freezing
Because it has no introns, researchers prefer to use
__________ when working with eukaryotic genes. a. cDNA b. single-stranded DNA c. hybridized DNA d. bacterial DNA e. viral DNA
Speciation _____
A) occurs at such a slow pace that no one has ever observed the emergence of new species B) occurs only by the accumulation of small genetic changes over vast expanses of time C) must begin with the geographic isolation of a small, frontier population D) can involve changes to a single gene
Which physiological group of bacteria is a subset of the other?
a. Acetic acid bacteria are a subset of acetogens. b. Acetogens are a subset of acetic acid bacteria. c. Methylotrophs are a subset of methanotrophs. d. Methanotrophs are a subset of methylotrophs.