Which of the following is NOT a distinguishing characteristic of prokaryotic cell?
They lack a plasma membrane
Which of the following statements about a gram-positive cell wall is false?
It protects the cell in a hypertonic environment
Which of the following statements best describes what happens when a bacterial cell is placed in a solution containing 5% NaCL?
Water will move out of the cell
The best definition of osmotic pressure is
The force with which a solvent moves across a semipermeable membrane from a higher to a lower concentration
By which of the following mechanisms can a cell transport a substance from a lower to a higher concentration?
Which of the following statements is true?
A. Endospores are for reproduction?
B. Endospores allow a cell to survive environmental changes
C. Endospores are easily stained in a Gram stain
D. A cell produces one endospore and keeps growing
E. A cell can produce many endospores
Endospores allow a cell to survive environmental changes
Which of the following pairs is mismatched?
A. Endoplasmic reticulum/internal transport
B. Gogli complex/secretion
C. Mitochondria/ATP production
D. Centrosome/food storage
E. Lysosome/digestive enzymes
Which of the following statements about prokaryotic cells is generally false?
They possess 80S ribosomes
Which of the following statements about gram-negative cells walls is false?
They are sensitive to penicillin
The difference between simple diffusion and facilitated diffusion is that facilitated diffusion
Requires transporter proteins
You have isolated a motile, gram-positive cell with no visible nucleus. You can safely assume that the cell
Has a cell wall
In Figure 4.3, which diagram of a cell wall is decolorized by acetone-alcohol
B (smaller) gram-negative
In Figure 4.3, which diagram of a cell wall is resistant to many antibiotics (e.g., penicillin)?
B (smaller) gram-negative
Where are phospholipids most likely found in a Eukaryotic cell?
Figure 4.4 shows movement across a plasma membrane. Which figure best represents a specific transporter protein?
O with o through the center partially closed
Figure 4.4 shows movement across a plasma membrane. Which figure best represents simple diffusion?
Substance passes through membrane without the aid of a protein
Figure 4.4 shows movement across a plasma membrane. Which figure best represents an aquaporin?
Water channel only (no diffusion)
What will happen if a bacterial cell is placed in a distilled water with lysozyme?
The cell will undergo osmotic lysis
What will happen if a bacterial cell is placed in 10% NaCL with penicillin?
The cell will plasmolyze
Which one of the following pairs is mismatched?
A. Metachromatic granules/phosphate storage
B. Lipid inclusions/energy reserve
C. Ribosomes/protein storage
D. Sulfur granules/energy reserve
E. Gas vacuoles/flotation