Benson's Microbiological Applications, Laboratory Manual in General Microbiology, Concise Version (14th Edition)
Verified Answer ✓
In preparing a smear, bacterial cells grown in a ... more
Verified Answer ✓
A low quantity of cells forms a thin smear. A thin... more
Verified Answer ✓
Heat fixation fixes the cells onto the slide ... more
Verified Answer ✓
Simple staining of microorganisms like ... more
Verified Answer ✓
Chromophores are positively charged molecules ... more
Verified Answer ✓
Basic dyes are cationic (positively charged), ... more
Verified Answer ✓
Acidic dyes are negatively charged and cannot bind... more
Verified Answer ✓
Crystal violet is a basic stain that carries a ... more
Verified Answer ✓
In a palisade arrangement, the rod-shaped cells ... more
Verified Answer ✓
Vibrio cholerae are comma- or curved-shaped rods, ... more
Verified Answer ✓
In the oral cavity (mouth) of humans ; The ... more
Verified Answer ✓
The microorganisms found in the oral cavity of ... more
Verified Answer ✓
Acidic dyes have negatively charged (anionic) ... more
Verified Answer ✓
Nigrosin and india ink are both negative stains. ... more
Verified Answer ✓
The heat fixing step is not included in staining ... more
Verified Answer ✓
A capsule is a polysaccharide layer that is ... more
Verified Answer ✓
A capsule appears as an unstained transparent halo... more
Verified Answer ✓
Capsules protect the bacterial cells from host's ... more
Verified Answer ✓
Capsules are made of polysaccharides. ; A capsule... more
Verified Answer ✓
The capsule helps microorganisms such as ... more
Verified Answer ✓
The capsule will either shrink or get destroyed if... more
Verified Answer ✓
The gram-staining technique was performed with ... more
Verified Answer ✓
The gram-staining technique uses more than one ... more
Verified Answer ✓
The gram-negative microorganisms have their cell ... more
Verified Answer ✓
Stains attach better to the cell wall of young ... more
Verified Answer ✓
Decolorization is the most crucial step in the ... more
Verified Answer ✓
In the Gram staining technique, Gram's iodine is ... more
Verified Answer ✓
The following are the reagents used in the Gram ... more
Verified Answer ✓
Gram-negative organisms (and not gram-positive) ... more
Verified Answer ✓
The primary stain, crystal violet, is the first ... more
Verified Answer ✓
Endospores are highly resistant structures that ... more
Verified Answer ✓
Exosporium is the outer most hydrophobic layer of ... more
Verified Answer ✓
Endospores have 10 to 30 percent less water ... more
Verified Answer ✓
Heat acts as a mordant that helps the primary ... more
Verified Answer ✓
Endospores can be destroyed by exposing them to ... more
Verified Answer ✓
In the (S-F) endospore staining, safranin is used ... more
Verified Answer ✓
Mycobacterium is an acid-fast bacilli that ... more
Verified Answer ✓
The cell wall of Mycobacterium contains a high ... more
Verified Answer ✓
Acid-fast bacteria belong to genus Mycobacterium ... more
Verified Answer ✓
Methylene blue is used as a counterstain in acid-... more
Verified Answer ✓
Heating and phenol (present in carbolfuchsin) acts... more
Verified Answer ✓
The "K" staining method is advantageous because it... more
Verified Answer ✓
Proteus vulgaris shows active motility by ... more
Verified Answer ✓
Semisolid media (SIM) that was inoculated with P. ... more
Verified Answer ✓
Flagella are thin hair-like extensions that are ... more
Verified Answer ✓
Directional motility helps in determining the true... more
Verified Answer ✓
An agar concentration of 0.4 percent is used ... more
Verified Answer ✓
Use of semisolid media is preferred while handling... more
Verified Answer ✓
The semisolid (SIM) media will become turbid (... more