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Microbiology
Chapter 3
Question | Answer |
---|---|
Which of the following have the thickest peptidoglycan layer in the cell wall? | Gram positive bacteria |
Which of the following is TRUE concerning LPS? | It is also called endotoxin |
Lysosome is an antibacterial enzyme in human tears that degrades peptidoglycan. Which type of organism would be MOST sensitive to lysozomes? | Gram-positive bacteria |
Mycoplasma have no cell wall, only membrane. What characteristic would you expect for these bacteria? | Sensitivity to osmotic lysis |
Which of the following statements BEST describes the ribosomes of eukaryotic cells? | Eukaryotic ribosomes are 80s |
Which of the following is NOT a function of the cytoskeleton in eukaryotic cells? | Helps the cells sense nutrients in its environment |
Which organelle is responsible for receiving processing and packaging large molecules that are destined to be secreted from the cell? | Golgi Body |
The ______ plays a role in lipid synthesis and transport | Smooth endoplasmic reticulum |
What structures must eukaryotic cells have in order to harvest light energy during photosynthesis? | Chloroplasts |
The lab synthesis of urea disproved what idea? | Organic chemicals could come only from living organisms |
What are two types of prokaryotic organisms? | Bacteria and archaea |
What is the typical size range for eukaryotic cells? | 10-100 microliters |
Which of the following is NOT a characteristic of all living things? | Movement |
Which of these is found ONLY in eukaryotes? | Endocytosis |
Sometimes prokaryotic cells are surrounded by a gelatinous sticky substance. What is this structure called? | Glycocalyx |
Which of the following is NOT a part of bacterial flagella? | Fimbria |
Cells use _______ to transfer DNA from one cell to another via conjugation. | Pili |
Which of the following BEST describes one of the functions of the bacterial cell wall? | Protection from osmotic forces |
Where can lipopolysaccharide be found? | In the outer membrane of Gram-negative bacteria cells. |
Which of the following is a function of the cytoplasmic membrane? | To control the passage pf substances into and out of the cell |
Which of the following is TRUE of the selectively permeable membrane? | It maintains a concentration gradient |
Which of the following statements about endospores is TRUE? | Endospores form in response to harsh environments conditions |
Which of the following is a difference between prokaryotic and archaeal flagella? | Archaeal flagella are powered by energy stores in ATP |
Which of these is found in BOTH Gram-negative and Gram-positive cell walls? | Peptidoglycan |