Gram-positive bacteria retain the crystal violet-iodine complex and stain purple, whereas gram-negative bacteria stain pink.
Blood agar is an enriched medium which supports growth of gram-positive cocci and differentiates them on the basis of hemolysis (α, β, or γ).
Catalase test is used to distinguish among Gram-positive cocci. Staphylococci are catalase-positive but Streptococci are catalase-negative.
Bacteria can be grown in an artificial medium in the laboratory. Growth medium can be broth, agar or biphasic. Medica can be categorized based on functions.
Selective (against gram-positive bacteria) and differential culture medium (LF and NLF), commonly used for the isolation of enterics.
TSI test determines whether a gram-negative rod utilizes glucose, and lactose or sucrose fermentatively and forms hydrogen sulfide.
A stereo microscope is a microscope used for observing larger samples as it has a larger area for the stage in low power.
Calcofluor white staining uses fluorescent dye, which especially stains the chitin present in the cell wall of fungi.
N. americanus is the most common hookworm worldwide, whereas A. duodenale is more geographically restricted. Iron-deficiency anemia and protein-energy malnutrition from blood loss are the two major manifestations of hookworm infections.
The DNA has all the required information that the mRNA decodes and then converts the decoded message to amino acids by translation.
Indoor air quality testing is the way of identifying levels of indoor contaminants and restoring good air indoors.
The structure of DNA consists of deoxyribose sugar, nitrogenous bases ( purine and pyrimidine), and phosphoric acid.
