MICR290 - MIDTERM STUDY GUIDE EXAM AND ACTUAL ANSWERS 2025.

Which of the following prokaryotic cells possesses an outer membrane? - Answer Gram-negative bacteria Free-living microorganisms characterized by the absence of a nucleus are called: - Answer Prokaryotes Using a microscope, you observe an amoeba moving toward a food source. This is an example of: - Answer Chemotaxis Which of the following is an incorrect pairing? - Answer protozoa-prokaryote The process by which parts of DNA getting copied to make messenger RNA is called: - Answer Transcription Presence of this structure in spiral shaped bacteria (spirochetes) gives them penetrating power into the tissues. - Answer Axial filament The cell walls of __________ contain peptidoglycan. - Answer Bacteria Which of the following organelles is responsible for producing most of the ATP in a eukaryotic cell? - Answer Mitochondria Which of the following bacterial cell structures plays an important role in the creation of biofilms? - Answer Slime layer In bacteria, transfer of DNA from one cell to another by way of sex pilus is called: - Answer Conjugation Which of the following structures are present in both eukaryotic and prokaryotic cells? - Answer Ribosomes MacConkey agar plates represent ________ medium. - Answer both selective and differential What is a virus that infects bacteria called? - Answer phage