BIOS 111 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: lysozyme
Answer:
-destroys gram + cell walls, remaining cellular contents: protoplast
gram - walls not completely destroyed, whats left: spheroplast
both protoplasts and spheroplasts burst in pure water bc no cell wall
Q: 3 strategies to kill microbes
Answer:
-antibiotics, vaccines, anti-adhesin mimics
Q: attachments
Answer:
-pili:longer, fewer
fimbriae:shorter, lots of them
protein
, BIOS 111 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Capsules
Answer:
-protective device but not essential
keeps dye out which is why its negative staining
affective against: detergents, viruses, antibiotics, biofilms
sticky sugars with OH bonds
sticky polysaccharide coat
appearance of bacterial colony tells you if there is a capsule or not
Q: streptococcus pneumoniae
Answer:
-occur in lungs
when they found out DNA was composed of genes
capsule present: smooth colonies=bacteria is hiding in capsules and causes disease so
mouse
dies
no capsule: rough colonies=no bacteria hiding in capsules so mouse lives
, BIOS 111 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Phagocytes
Answer:
-ingest foreign bacteria and kill them
when capsules are present, cant kill bacteria bc they are hiding inside
Q: PAMP (pathogen associated molecular patterns): on the surface bacterium which
macrophage
Answer:
recognizes as foreign and kills it
Q: Griffins Experiment 1935
Answer:
-evidence that genes are made from DNA
heat encapsulated bacteria kept mouse alive bc heat killed the bacteria
living bacteria and heat encapulated bacteria killed mouse
later found to be DNA
Latest 2026 Update
Q: lysozyme
Answer:
-destroys gram + cell walls, remaining cellular contents: protoplast
gram - walls not completely destroyed, whats left: spheroplast
both protoplasts and spheroplasts burst in pure water bc no cell wall
Q: 3 strategies to kill microbes
Answer:
-antibiotics, vaccines, anti-adhesin mimics
Q: attachments
Answer:
-pili:longer, fewer
fimbriae:shorter, lots of them
protein
, BIOS 111 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Capsules
Answer:
-protective device but not essential
keeps dye out which is why its negative staining
affective against: detergents, viruses, antibiotics, biofilms
sticky sugars with OH bonds
sticky polysaccharide coat
appearance of bacterial colony tells you if there is a capsule or not
Q: streptococcus pneumoniae
Answer:
-occur in lungs
when they found out DNA was composed of genes
capsule present: smooth colonies=bacteria is hiding in capsules and causes disease so
mouse
dies
no capsule: rough colonies=no bacteria hiding in capsules so mouse lives
, BIOS 111 Exam 1 Questions and Answers with Verified Solutions |
Latest 2026 Update
Q: Phagocytes
Answer:
-ingest foreign bacteria and kill them
when capsules are present, cant kill bacteria bc they are hiding inside
Q: PAMP (pathogen associated molecular patterns): on the surface bacterium which
macrophage
Answer:
recognizes as foreign and kills it
Q: Griffins Experiment 1935
Answer:
-evidence that genes are made from DNA
heat encapsulated bacteria kept mouse alive bc heat killed the bacteria
living bacteria and heat encapulated bacteria killed mouse
later found to be DNA
