The technique of ________ is a means of determining the function of a gene by the phenotype resulting from its absence
A) gene therapy
B) gene knockout
C) probe analysis
D) expression vector cloning
E) FISH
B
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Which theory states that the universe originated with an explosion and continues to expand?
a. Plate tectonics b. Cell theory c. Global warming d. Evolution e. Big bang theory
During DNA replication in E. coli, what is the role of DnaA?
A) DnaA is a region of DNA recognized by the replisome where replication is initiated. B) DnaA bends DNA, hydrolyzing the hydrogen bonds in the 13-mer region of oriC and creating an open complex. C) DnaA is a helicase that uses ATP to hydrolyze hydrogen bonds and separate DNA strands. D) DnaA carries the helicase protein to the open region of DNA where hydrolysis and strand separation will occur. E) DnaA prevents reannealing of the separated strands so replication can proceed.
What advantages does chorionic villus sampling have over amniocentesis for fetal analysis of genetic defects?
What will be an ideal response?
What is the term used to describe relatively small areas with unusually high concentrations of species found there and nowhere else, including many species in high risk of extinction? These areas receive the focus of global conservation efforts
A) Natural wildlife reserve B) Biodiversity hot spot C) Protective wilderness refuge D) Protective conservation zone