Which one of the following groups do the medical pathogensbelong to ?
A. Psychrophiles;
B. Mesophiles;
C. Thermophiles;
D. Hyperthermophiles.
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From which bacteria of the following groups was the DNA polymerase purified to be applied in PCR?
A. Psychrophiles
B. Mesophiles;
C. Thermophiles;
D. Hyperthermophiles;
Which group of molecule can not diffuse across the membrane of bacteria?
A. Oxygen;
B. glucose;
C. carbon dioxide,
D. Alcohol;
What will happen to the bacterial cells in hypertonic solution because of effect of osmosis?
A. No change to the cells;
B. The cells will be swollen;
C. The cells will shrink;
D. The water will move into the cells.
Which statement about active transport of bacteria is not right?
A. The gated channel in cytoplasmic membrane involved;
B. The processes require the energy stored in ATP molecules ;
C. The materials move against their electrochemical gradient to cross the membrane;
D. The materials move down its concentration gradient to cross the membrane.
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