MICROB 3200- Exam 1 2025/2026 Exam
Questions with 100% Correct Answers |
Latest Update
3 domains of life - 🧠 ANSWER ✔✔Bacteria
Archaea
Eurkarya
Basic shapes/structures of bacterial cells - 🧠 ANSWER ✔✔cocci
bacilli
spirilli
How do you differentiate between the different domains of life? - 🧠 ANSWER
✔✔rRNA sequences
Bacterial pathogens range in size from - 🧠 ANSWER ✔✔0.2-2 microns in diameter
Binary Fission Steps - 🧠 ANSWER ✔✔1) DNA replicatoin
,2) separate DNA via cytoplasmic membrane elongation
3) cross wall forms; invagination
4) cell wall forms completely
5) daughter cells separate
Endospores - 🧠 ANSWER ✔✔-gram + Bacillus and Clostridium
-each vegetative cell transforms into one endospore
-defensive strategy against hostile or unfavorable conditions
-resistant to drying, heat, radiation, disinfectants
-potential biological weapons of mass destruction
Endospore formation steps - 🧠 ANSWER ✔✔1) DNA replicated
2) DNA aligns along cell's long axis
3) cytoplasmic membrane invagination; forms forespore
4) cytoplasmic membrane goes and engulfs forespore within a second membrane
5) vegetative cell DNA disintegrates
6) Ca++ and dipicolinic acid is deposited between the membranes
7) spore coat forms around endospore
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STATEMENT. ALL RIGHTS RESERVED
, 8) maturation of endospore
9) endospore released from original spore
Types of staining - 🧠 ANSWER ✔✔gram and acid-fast
Steps in gram staining - 🧠 ANSWER ✔✔crystal violet
gram's iodine
acetone
safranin red
Gram stain not used for - 🧠 ANSWER ✔✔mycoplasmas, mycobacterial/nocardia,
archaea
Why gram stain can't be used on mycoplasmas? - 🧠 ANSWER ✔✔lack cell walls
sterols in PM
Why gram stain can't be used on archaea - 🧠 ANSWER ✔✔wall-less or walls of
pseudomuerin
How do you stain mycobacteria/norcardia? - 🧠 ANSWER ✔✔acid fast
Why can't you gram stain mycobacteria? - 🧠 ANSWER ✔✔have waxy
hydrophobic outer layer
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
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STATEMENT. ALL RIGHTS RESERVED
Questions with 100% Correct Answers |
Latest Update
3 domains of life - 🧠 ANSWER ✔✔Bacteria
Archaea
Eurkarya
Basic shapes/structures of bacterial cells - 🧠 ANSWER ✔✔cocci
bacilli
spirilli
How do you differentiate between the different domains of life? - 🧠 ANSWER
✔✔rRNA sequences
Bacterial pathogens range in size from - 🧠 ANSWER ✔✔0.2-2 microns in diameter
Binary Fission Steps - 🧠 ANSWER ✔✔1) DNA replicatoin
,2) separate DNA via cytoplasmic membrane elongation
3) cross wall forms; invagination
4) cell wall forms completely
5) daughter cells separate
Endospores - 🧠 ANSWER ✔✔-gram + Bacillus and Clostridium
-each vegetative cell transforms into one endospore
-defensive strategy against hostile or unfavorable conditions
-resistant to drying, heat, radiation, disinfectants
-potential biological weapons of mass destruction
Endospore formation steps - 🧠 ANSWER ✔✔1) DNA replicated
2) DNA aligns along cell's long axis
3) cytoplasmic membrane invagination; forms forespore
4) cytoplasmic membrane goes and engulfs forespore within a second membrane
5) vegetative cell DNA disintegrates
6) Ca++ and dipicolinic acid is deposited between the membranes
7) spore coat forms around endospore
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, 8) maturation of endospore
9) endospore released from original spore
Types of staining - 🧠 ANSWER ✔✔gram and acid-fast
Steps in gram staining - 🧠 ANSWER ✔✔crystal violet
gram's iodine
acetone
safranin red
Gram stain not used for - 🧠 ANSWER ✔✔mycoplasmas, mycobacterial/nocardia,
archaea
Why gram stain can't be used on mycoplasmas? - 🧠 ANSWER ✔✔lack cell walls
sterols in PM
Why gram stain can't be used on archaea - 🧠 ANSWER ✔✔wall-less or walls of
pseudomuerin
How do you stain mycobacteria/norcardia? - 🧠 ANSWER ✔✔acid fast
Why can't you gram stain mycobacteria? - 🧠 ANSWER ✔✔have waxy
hydrophobic outer layer
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
