Prokaryotes ____
a. have a nucleus
b. are multicellular
c. always have cell walls
d. are either bacteria or archaeans
e. always have flagella
ANSWER: d
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Thin filaments and thick filaments are made of proteins. Of which of the following proteins are thin filaments composed?
a. myosin b. lectin c. actin d. keratin
Which assay allows you to identify the exact location of the protein-binding sequence within a promoter?
A) western blotting B) in situ hybridization C) pulse-chase assay D) Southern blotting E) DNA footprint protection assay
During the initiation step of transcription, which molecule binds the promoter region of a DNA molecule?
A) DNA polymerase B) Reverse transcriptase C) RNA polymerase D) DNA primase E) Topoisomerase
The activity of Rab GTPases are regulated by all of the following classes of proteins except
a. GAP (GTPase activating protein). b. GDI (GDP-dissociation inhibitor). c. GEF (Guanine nucleotide exchange factor). d. GTF (Guanine nucleotide trypolysis factor).