Microbiology Test 2 Questions 25-50
Which figure is a tetrad?
B
Bacterial smears are fixed before staining to: A. Accept stain B. Affix the cells to the slide C. Make the cells visible D. Make their walls permeable
B. Affix the cells to the slide
Which of the following places the steps of the Gram Stain in the correct order? 1. Alcohol-acetone 2. Crystal violet 3. Safranin 4. Iodine
2, 4, 1, 3: crystal violet, iodine, alcohol-acetone, safranin
Which figure possesses axial filaments?
A
Normal microbiota are typically found in and on all the following body locations except: A. Blood B. Mouth C. Colon D. Upper respiratory system E. Skin
A. Blood
A strictly fermentative bacterium produces energy by: A. Glycolysis only B. Only in the presence of oxygen C. Only in the absence of oxygen D. Fermentation or aerobic respiration E. Aerobic respiration only
A. Glycolysis only
The DNA found in most bacterial cells: A. Is circular in structure B. Is linear in structure C. Is found in multiple copies D. Is surrounded by a nuclear membrane E. Utilizes histones for chromosomal packaging
A. Is circular in structure
Oxygen crosses a plasma membrane: A. Through simple diffusion B. By osmosis C. With the help of a nonspecific transporter D. Through posing E. Through facilitated diffusion
A. Through simple diffusion
The negative stain is used to: A. Visualize capsules B. Determine Gram reaction C. Visualize endospores D. Determine cell size E. Determine flagella arrangement
A. Visualize capsules
Which of the following organelles most closely resembles a prokaryotic cell? A. Vacuole B. Mitochondrion C. Nucleus D. Golgi complex E. Cell wall
B. Mitochondrion
What do genes consist of? A. Lipids B. Nucleic acid C. Proteins D. Carbohydrates
B. Nucleic acid
Which molecule is composed of a chain of amino acids? A. Lipid B. Protein C. Nucleic acid D. Carbohydrate
B. Protein
Which of the following have a cell wall? A. Mycoplasmas B. Animal cells C. Fungi D. Protoplasts E. L forms
C. Fungi
What is the type of bond between ions in salt? A. Covalent bond B. Hydrogen bond C. Ionic bond
C. Ionic bond
Antibiotics that target cell wall synthesis ultimately cause bacterial cell death as a result of: A. Decreased synthesis of peptidoglycan B. Plasmolysis C. Osmotic lysis D. Cell shrinkage E. Inhibition of molecular transport
C. Osmotic lysis
The difference between simple diffusion and facilitated diffusion is that facilitated diffusion: A. Does not require ATP B. Moves materials from a lower to a higher concentration C. Requires transporter proteins D. Moves materials from a higher to a lower concentration E. Requires ATP
C. Requires transporter proteins
Where are phospholipids most likely found in a prokaryotic cell? A. Flagella B. Around organelles C. The plasma membrane D. Ribosomes E. The plasma membrane and around organelles
C. The plasma membrane
Structurally, ATP is most like which type of molecule? A. Protein B. Lipid C. Carbohydrate D. Nucleic acid
D. Nucleic acid
The purpose of mordant in the Gram stain is to: A. Make the flagella visible B. Make material cells larger C. Make farm-negative cells visible D. Prevent the crystal violet from leaving the cells E. Remove the simple stain
D. Prevent the crystal violet from leaving the cells
Which of the following is streptococci?
Dots in a row
Which stain is most useful in helping clinicians to decide which antibiotic to prescribe for a bacterial infection? A. Simple stain B. Negative stain C. Flagella stain D. Endospore stain E. Gram stain
E. Gram stain
T/F: An apoenzyme that loses its coenzyme subunit will be non-functional.
True
T/F: Both respiration and photosynthesis require the use of an electron transport chain.
True
T/F: Catabolic Reactions are generally degradative and hydrolytic.
True
T/F: Glycolysis is utilized by cells in both respiration and fermentation.
True
T/F: Once an enzyme has converted substrates into products, the active site reverts back to its original form.
True