essay questions Flashcards
list several properties of virus
small
obligate intracellular parasites
lack enzymes
genome is DNA or RNA, but not both
active only inside hosts cells
DNA replication properties
semi conservative
bidirectional
gives rise to 2 forks
parent strands (3’-5’) serve as templates for daughter strands(5’-3’)
carried out by DNA polymerase
DNA Structure
two polynucleotide strands
two strands run in opposite directions
sugar phosphate backbone on the outside
base-pairs on the inside
bases are complementary to each other
translation definition
protein synthesis from mRNA code
steps of gram stain
crystal violent
gram iodine
decolonization
safranin
moist heat vs. dry heat
moist: heat combined with some form of water; hot water, boiling water, or steam. operates at lower temps & shorter exposure times
dry: air with low moisture content that has been heated from 160 to several thousands degrees Celsius; heat by a flame or electric heating coil