Introns have no detectable functions.
Answer the following statement true (T) or false (F)
False
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Members of the hyperthermophilic anaerobe lineage are known to reside in marine and terrestrial geothermal habitats.
Answer the following statement true (T) or false (F)
When characterizing DNA gyrase, the Cozzarelli group added a minimal amount of ATP to the reaction tubes containing DNA and gyrase. They did this in order to:
A. confirm that ATP would cause the reaction to reverse and the relaxed DNA would revert to supercoiled form. B. view the incremental increase of supercoiling of plasmid DNA as gyrase changed the linking number by 1 C. view the incremental increase of supercoiling of plasmid DNA as gyrase changed the linking number by 2 D. view the incremental relaxation of plasmid DNA as gyrase changed the linking number by 1 E. view the incremental relaxation of plasmid DNA as gyrase changed the linking number by 2
What is meant by the "beads on a string" model of chromatin?
A) The beads are the histones, and the string is the transcriptionally active DNA loops. B) The beads are the nucleosomes, and the string is the linker DNA. C) The beads are molecules of DNA polymerase that attach to the DNA string. D) The beads are ribosomes, and the string is the mRNA that has been transcribed from active chromatin. E) The beads are the heterochromatic regions that are tightly compacted, and the strings are euchromatic regions that are being actively transcribed.
What are genetically modified organisms (GMOs) also called?
A) artificial crop plants B) artificially selected organisms C) transgenic organisms D) mutant crop plants