CRCST CERTIFICATION EXAM
QUESTIONS AND ANSWERS
Micro-Biology - Answer-The study micro organisms (nature, life and action)
Bacteria Size - Answer-1 or 2 microns
Flagella - Answer-Enables movement (Whip like tails)
Protoplasm - Answer-All materials floating in a cell capsule
Cell Membrane - Answer-a thin semi-permeable membrane that surrounds the cell's
cytoplasm, enclosing its contents
Cocci - Answer-Round shape bacteria. Occurs in pairs, chains, or clusters. (exp.
Staphylococcus)
Bacillus - Answer-Rod shape. Small stick like rods or large brick like rods (exp.
Pseudomonas Aeruginosa)
Spirillum - Answer-Spiral shaped bacteria
Stain - Answer-Divides bacteria into two groups (gram positive purple stain and gram
Negative red stain)
Acid Fast Stain - Answer-Red- acid fast
Blue- non acid fast
Aerobic Bacteria - Answer-Needs oxygen and grows in liquids
Anaerobic Bacteria - Answer-Without oxygen
Psychrophiles - Answer-Grows best at 59degrees f-68)
Thermophiles - Answer-122-158 degrees
Mesophiles - Answer-68 to 113 degrees. (most pathogenic to humans)
Acidity - Answer-lower ph means higher acidity (4.4 ph inhibits most bacterial growth)
Normal ph - Answer-Neutral environment (7.0-7.8 ph promotes microbial growth and
pathogenic to humans)
Virus - Answer-1000 smaller than bacteria, no means of movement
QUESTIONS AND ANSWERS
Micro-Biology - Answer-The study micro organisms (nature, life and action)
Bacteria Size - Answer-1 or 2 microns
Flagella - Answer-Enables movement (Whip like tails)
Protoplasm - Answer-All materials floating in a cell capsule
Cell Membrane - Answer-a thin semi-permeable membrane that surrounds the cell's
cytoplasm, enclosing its contents
Cocci - Answer-Round shape bacteria. Occurs in pairs, chains, or clusters. (exp.
Staphylococcus)
Bacillus - Answer-Rod shape. Small stick like rods or large brick like rods (exp.
Pseudomonas Aeruginosa)
Spirillum - Answer-Spiral shaped bacteria
Stain - Answer-Divides bacteria into two groups (gram positive purple stain and gram
Negative red stain)
Acid Fast Stain - Answer-Red- acid fast
Blue- non acid fast
Aerobic Bacteria - Answer-Needs oxygen and grows in liquids
Anaerobic Bacteria - Answer-Without oxygen
Psychrophiles - Answer-Grows best at 59degrees f-68)
Thermophiles - Answer-122-158 degrees
Mesophiles - Answer-68 to 113 degrees. (most pathogenic to humans)
Acidity - Answer-lower ph means higher acidity (4.4 ph inhibits most bacterial growth)
Normal ph - Answer-Neutral environment (7.0-7.8 ph promotes microbial growth and
pathogenic to humans)
Virus - Answer-1000 smaller than bacteria, no means of movement
