BIOS 242- CHAMBERLAIN EXAM 1 QUESTIONS AND ANSWERS GRADED A+ 2025/2026

BIOS 242- CHAMBERLAIN EXAM 1
QUESTIONS AND ANSWERS GRADED A+
2025/2026




DNA is replicated in the ___
nucleus
RNA is replicated in the ___
cytoplasm
what is the first step in viral replication?
penetration/adhesion (attaches to membrane using spikes)
what is the second step in viral replication?
uncoating
what is the third step in viral replication?
replication
what is the fourth step in viral replication?
assembly
what is the fifth step in viral replication?
maturation
what is the sixth step in viral replication?
release (release the protein that has the viral components so it infects more cells)
what are the four types of archaea?
methanogens, hyperthemophile, psychrophile, halophiles
what are characteristics of a methanogen?

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, CO2 with methane
where are methanogens found?
swamps, landfill
what are characteristics of a hyperthermophile?
loves high temperature
where are hyperthermophiles found?
volcano
what are characteristics of a psychrophile?
survives in cold temperatures
where are psychrophiles found?
ice caps
what are characteristics of a halophile?
survives in salt environments
where are halophiles found?
salt lake
This type of archaea live in swamps and marshes and produce methane, what is it?
methanogen
This type of archaea requires hot, acidic environments
hyperthemophile
during a gram stain, the presence of ____ gives a purple stain
peptidolgycan
why is gram negative bacteria pink?
outer membrane is weakened
what do gram negative bacteria have
porin proteins, lipopolysaccharide-phospholipid outer membrane surrounding a thin
peptidoglycan layer.
what do gram positive bacteria have
lipoteichoic acid with thick peptidoglycan cell wall



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