StraighterLine Microbiology BIO250 Final

StraighterLine Microbiology BIO250 Final Proctored Exam Review | / Actual Exam – 60 Verified Questions and Correct Answers​ StraighterLine | BIO250 Microbiology | Final Proctored Exam | Verified Q&A | Expert-Curated | 100% Accuracy | Graded A+

Introduction​ This focused exam review contains 60 verified multiple-choice questions and correct answers derived from the most recent / StraighterLine BIO250 Microbiology Final Proctored Exam. It covers microbial structure, metabolism, genetics, immunology, infection control, and disease mechanisms—ideal for mastering core microbiology concepts.Answer Format​ All correct answers are clearly marked in bold and green for efficient study and confident exam preparation.

BIO250 Microbiology Final Exam | / Verified Q&A | 60 Questions | Graded A+ | Study Smart, Pass with Confidence Question 1​ What is the primary component of bacterial cell walls?​

• Lipids​

B) Peptidoglycan​

• Proteins​
• Nucleic acids​

Rationale: Peptidoglycan provides structural support in bacterial cell walls.

Question 2​ Which structure is used by bacteria for motility?​

• Ribosomes​

B) Flagella​

• Capsule​
• Plasmid​

Rationale: Flagella enable bacterial movement.

Question 3​ What is the process by which bacteria convert glucose to energy without oxygen?​

• Photosynthesis​ 1 / 2

• Fermentation​
• Oxidative phosphorylation​
• Glycolysis only​

Rationale: Fermentation generates energy anaerobically.

Question 4​ Which type of microorganism lacks a nucleus?​

• Fungi​

B) Bacteria​

• Protozoa​
• Algae​

Rationale: Bacteria are prokaryotes without a nucleus.

Question 5​ What is the role of plasmids in bacteria?​

• Structural support​

B) Carry extrachromosomal DNA​

• Energy production​
• Protein synthesis​

Rationale: Plasmids contain additional genetic material.

Question 6​ Which staining technique is used to identify acid-fast bacteria?​

• Gram stain​

B) Acid-fast stain​

• Capsule stain​
• Spore stain​

Rationale: Acid-fast stain detects Mycobacterium species.

Question 7​ What is the primary source of nutrition for most bacteria?​

• Sunlight​

B) Organic compounds​

• Inorganic salts​
• Water​

Rationale: Bacteria typically use organic compounds.

Question 8​ Which process involves the transfer of genetic material between bacteria via a virus?​

• Conjugation​

B) Transduction​

• Transformation​
• Binary fission​

Rationale: Transduction uses bacteriophages.

Question 9​ What is the function of the bacterial capsule?​

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