essay questions

Question 1

list several properties of virus

Answer 1

small

obligate intracellular parasites

lack enzymes

genome is DNA or RNA, but not both

active only inside hosts cells

Question 2

DNA replication properties

Answer 2

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

Question 3

DNA Structure

Answer 3

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

Question 4

translation definition

Answer 4

protein synthesis from mRNA code

Question 5

steps of gram stain

Answer 5

crystal violent
gram iodine
decolonization
safranin

Question 6

moist heat vs. dry heat

Answer 6

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