MICROBIOLOGY EXAM 1 LATEST REAL EXAM 2024 COMPLETE 250+ QUESTIONS AND CORRECT ANSWERS RATED A+
function of ribosomes - -protein synthesis
-site of action for aminoglycosides, erythromycin, tetracyclines and chloramphenicol
function of nucleoid - Contains DNA
function of mesosome - cell division and secretion
Function of plasma membrane - site of oxidative and transport enzymes
function of capsule - -protects against phagocytosis
-sticks to cell
Function of pilus or fimbria - (1) sticks to cell
(2) sex pilus attaches 2 bacteria during conjugation
function of flagellum - motility
Function of spore - Provides resistance to dehydration, heat chemicals
Function of plasmid - variety of genes for antibiotic resistance and toxins
Function of granule - site of nutrients in cytoplasm
Function of glycocalyx - adherence to surfaces
Identify 3 components of both gram positive and negative bacteria. - -Cell wall
-Capsule
-Plasma cell membrane
Compare/contrast gram (+) and gram (-) bacteria - Gram (+)
1. thick peptidoglycan
2. small periplasmic space
3. Teichoic acid
Gram (-)
1. THIN peptidoglycan
2. LPS
3. Porins
4. Large periplasmic space
Plasmids carry genes for? - 1. Antibiotic resistance
2. Resistance to heavy metals (Hg, Ag)
3. Resistance to UV light
4. Pili
5. Exotoxins
Bacterial shapes: cocci - - diplococci (pair)
- streptococci
- tetrad (4)
- staphylococci
- Sarcina (cube of 8)
Bacterial shapes: Rods (Bacilli) - -chain of bacilli
-flagellate rods
-spore former
Bacterial shapes: Spirals - -Vibrios
-Spirilla
-Spirochaetes
The shape of a bacterium is determined by its _____. - rigid cell wall
Smallest and largest bacteria - Smallest:
Mycoplasma
Largest: Bacillus anthracis
Bacteria is a prokaryote with the following characteristics : ______ - -no nucleus or membrane-bound organelles
-chromosomes and plasmids freely float in cytoplasm
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