(A) Staphylococcus aureus from Staphylococcus epidermidis

(B) Staphylococcus epidermidis from Neisseria meningitidis

(C) Streptococcus pyogenes from Enterococcus faecalis

(D) Streptococcus pyogenes from Staphylococcus aureus

(A) Shigella dysenteriae

(B) Streptococcus pyogenes

(C) Clostridium difficile

(D) Salmonella enteriditis

(A) Actinomycosis

(B) Q-fever

(C) Pulmonary tuberculosis

(D) Gonorrhea

(A) Proteus mirabilis

(B) Escherichia coli

(C) Klebsiella pneumoniae

(D) Bacteroides fragilis

(A) Actinomyces

(B) Clostridium

(C) Rhizobium

(D) Clostridium, Actinomyces

(A) Vibrio cholerae

(B) Escherichia coli

(C) Clostridium perfringens

(D) Enterococcus faecalis

(A) Mycobacterium tuberculosis stains blue because of the thick lipid layer

(B) Streptococcus pyogenes stains blue because of a thick peptidoglycan layer

(C) Escherichia coli stains pink because of a thin peptidoglycan layer

(D) Mycoplasma pneumoniae is not visible in the Gram’s stain because it has no cell wall

(A) Contains metabolic enzymes

(B) Is selectively permeable

(C) Regulates the entry and exit of materials

(D) Contains proteins and phospholipids

(A) Steroids

(B) Peptidoglycan

(C) Lipopolysaccharides

(D) Polypeptide

(A) Mycoplasmas

(B) Amoeba

(C) E.coli

(D) Spheroplast