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BIOD 171/ BIOD171 Module 5 Exam (Latest 2026/2027 Update) | Complete Q&A with Verified Answers and Detailed Rationales | Essential Microbiology with Lab | A+ Graded | Portage Learning

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INSTANT PDF DOWNLOAD – This is the comprehensive Module 5 Exam study guide for BIOD 171 Essential Microbiology with Lab at Portage Learning (Latest 2026/2027 Update), featuring 30+ actual exam questions with 100% verified answers and detailed rationales . The exam requires Respondus LockDown Browser and has a 60-minute time limit . This guide covers all key topics : Universal Precautions & Sample Analysis – Treating all samples as potentially hazardous; observing size/shape, motility, Gram status, chemical reactions, and color changes; determining motility BEFORE Gram staining (heat fixation kills organisms, making motility observation impossible) . Infection Steps – The 5 steps of infection: Entry, Attachment, Invasion, Evasion, Exit & Transmission . Streptococcus & Staphylococcus – Strep is catalase negative (cannot break down peroxides), cultured on Blood Agar, Lancefield groups based on carbohydrate antigens (not hemolytic activity), untreated strep pharyngitis can lead to Rheumatic fever (beta-hemolytic) . Staphylococcus is found non-symptomatically in ~30% of the population (not 80%), is catalase positive, and can ferment mannitol (MSA agar turns yellow) . TB & Leprosy – TB requires acid-fast stain (not Gram stain); TB can spread to brain/spine/kidneys . Leprosy (Hansen's disease) is an acid-fast rod that can remain asymptomatic for up to 20 years, affects skin/nerves/respiratory tract/eyes, and is treated free by WHO . Botulism, Tetanus, & Gas Gangrene – Infant botulism occurs in children 6 months from honey; foodborne botulism requires pre-formed toxin from improperly canned low-acid foods . Tetanus has no cure (only symptom management) but is preventable by vaccination . Gas gangrene is characterized by robust carbohydrate fermentation, swelling, fever, and is caused by Clostridium perfringens alpha-toxin perfringolysin (forms pores leading to cell lysis/death) . Plague & Syphilis – Bubonic plague: painfully swollen lymph nodes; Pneumonic plague: highly virulent, targets respiratory system; Septicemic plague: most rare, targets blood . Syphilis is caused by Gram-negative spirochete . BIOD 171 Module 5 Exam Portage Universal Precautions Microbiology Infection Steps Entry Attachment Invasion Evasion Exit Streptococcus Catalase Negative Blood Agar Rheumatic Fever Beta Hemolytic Strep Pharyngitis Staphylococcus MSA Mannitol Ferment Yellow Mycobacterium Tuberculosis Acid Fast Stain Leprosy Hansen Disease WHO Free Treatment Infant Botulism Honey Clostridium Botulinum Gas Gangrene Carbohydrate Fermentation Perfringolysin Bubonic Plague Swollen Lymph Nodes Pneumonic Plague Highly Virulent Respiratory Septicemic Plague Most Rare Blood Syphilis Gram Negative Spirochete Facultative Anaerobe Aerobic Anaerobic Growth Lancefield Groups Carbohydrate Antigens A+ Grade Microbiology Study Guide Portage Learning BIOD 171 Module 5 Exam Prep

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Portage Learning




5 DOM · 171 DOIB
★ ★




P A Division of Geneva College
EST. 2012
ONLINE COURSES FOR COLLEGE CREDIT




BIOD 171 : MODULE 5
E SS E N T I A L M I C R O B I O LO G Y — PAT H O G E N I C B ACT E R I A & I N F E CT I O US D I S E A S E

INSTITUTION Portage Learning (Geneva College) PROGRAM Pre-Nursing / Health Sciences
COURSE CODE BIOD 171 COURSE TITLE Essential Microbiology
ACADEMIC YEAR EXAM TITLE BIOD 171 : MODULE 5
TOTAL QUESTIONS 36 Questions FORMAT Multiple Choice / True-False /
Matching


EXAMINATION INSTRUCTIONS
▸ Select the single best answer unless otherwise specified.
▸ Questions randomized from source material per Component 16.
▸ Topics: Universal Precautions, Streptococcus, Staphylococcus, TB, Leprosy, Clostridium, Plague, STDs.
▸ Correct answers and rationales appear below each question.

, PATHOGENIC BACTERIA & INFECTIOUS DISEASE —
Questions 1 – 36
MODULE 5

1. Define the concept of universal precautions.
A. Only known pathogens require safety measures
B. Any and all samples, whether known or unknown, are to be treated as potentially
hazardous/pathogenic materials
C. Only blood samples require precautions
D. Gloves are optional unless the sample is visibly contaminated
CORRECT ANSWER B — All samples, known or unknown, must be treated as potentially
hazardous
RATIONALE Universal precautions is a fundamental laboratory and healthcare safety
principle: treat EVERY sample as potentially infectious regardless of known status.


2. List at least 3 observations noted when assessing an unknown microbial sample.
A. Color, smell, and taste only
B. Size and shape, Gram status, any observable motility
C. Price, brand, and expiration date
D. Only the Gram status is necessary
CORRECT ANSWER B — Size/shape, Gram status, observable motility (also chemical reactions,
color changes, etc.)
RATIONALE Key observations include: size and shape, any observable motility, Gram status
(positive or negative), chemical reactions, color changes, and capturing images of
characteristics.

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