Nucleosome Model of Chromosome

Nucleosome Model of Chromosome

Nucleosome Model of Chromosome The chromosomes are the nuclear components of the special organization, individuality, and function that are capable of self-reproduction and play a vital role in heredity, mutation, variation and evolutionary development of the species. Each chromosome is made up of DNA tightly coiled many times around proteins that support its structure. The proteins that bind … Read moreNucleosome Model of Chromosome

Lysine Iron Agar (LIA)

Lysine Iron Agar (LIA)

Lysine Iron Agar (LIA) Lysine iron agar (LIA) is a differential medium used to test organisms for the ability to deaminate lysine or decarboxylate lysine.  Lysine deamination is an aerobic process which occurs on the slant of the media.  Lysine decarboxylation is an anaerobic process which occurs in the butt of the media. Edwards and Fife designed LIA in 1961 to presumptively identify Salmonella species, including lactose fermenting Salmonella … Read moreLysine Iron Agar (LIA)

Difference between active transport and passive transport

Difference between active transport and passive transport

Difference between active transport and passive transport Active and passive transport are the two main biological process which plays an important role in supplying nutrients, water, oxygen, and other essential molecules to cells and also by removing waste products. Both active and passive transport works for the same cause, but with different movement. Active transport … Read moreDifference between active transport and passive transport

Different forms of DNA- A form, B form, Z form

Different forms of DNA

Different forms of DNA- A form, B form, Z form The right-handed double-helical Watson – Crick Model for B-form DNA is the most commonly known DNA structure. In addition to this classic structure, several other forms of DNA have been observed. The helical structure of DNA is thus variable and depends on the sequence as … Read moreDifferent forms of DNA- A form, B form, Z form

Biochemical Test of Clostridium tetani

Biochemical Test of Clostridium tetani

Biochemical Test of Clostridium tetani Some of the characteristics are as follows: Basic Characteristics Properties (Clostridium tetani) Capsule Negative (-ve) Catalase Negative (-ve) Flagella Peritrichous Gas Positive (+ve) Gelatin Hydrolysis Positive (+ve) Gram Staining Gram-stain-positive, but become Gram-stain-negative after approximately 24 h incubation. Growth in 20% Bile Negative (-ve) Growth in 6.5% NaCl Negative (-ve) … Read moreBiochemical Test of Clostridium tetani

Charcoal Selective Medium

Result Interpretation on Charcoal Selective Medium

Charcoal Selective Medium In 1984, Bolton et al. stated charcoal might efficiently substitute blood in a culture medium for isolating Campylobacter spp. Endtz et al. later confirmed there is higher isolation rate for Campylobacter while using the charcoal selective medium. Composition of Charcoal Selective Medium Ingredients Gm/L Beef extract 10.0g Gelatin Peptone 10.0g Sodium Chloride … Read moreCharcoal Selective Medium

Biochemical Test of Chlamydia trachomatis

Biochemical Test of Chlamydia trachomatis

Biochemical Test of Chlamydia trachomatis Some of the characteristics are: Basic Characteristics Properties (Chlamydia trachomatis) Organism Type Obligate intracellular organism that parasitize and multiply in the cytoplasm of eukaryotic cells within membrane bound vacuoles, termed inclusions, by a unique developmental cycle. ATP/ADP Transport System Negative (-ve) Body Types Elementary and Reticulate Flagella Absent Gram Staining … Read moreBiochemical Test of Chlamydia trachomatis

Watson and Crick DNA Model

Watson and Crick DNA Model

Watson and Crick DNA Model DNA stands for Deoxyribonucleic acid which is a molecule that contains the instructions an organism needs to develop, live and reproduce. It is a type of nucleic acid and is one of the four major types of macromolecules that are known to be essential for all forms of life. DNA Model … Read moreWatson and Crick DNA Model

Biochemical Test of Enterococcus faecium

Biochemical Test of Enterococcus faecium

Biochemical Test of Enterococcus faecium Some of the characteristics are as follows: Basic Characteristics Properties (Enterococcus faecium) 40% Bile Salts Positive (+ve) Capsule Negative (-ve) Catalase Negative (-ve) Citrate Negative (-ve) Gelatin Hydrolysis Negative (-ve) Gram Staining Gram-positive H2S Negative (-ve) Hemolysis Variable 0.1% Methylene blue milk Positive (+ve) Motility Negative (-ve) 6.5% NaCl Positive … Read moreBiochemical Test of Enterococcus faecium

Biochemical Test of Clostridium botulinum

Biochemical Test of Clostridium botulinum

Biochemical Test of Clostridium botulinum (Type A and proteolytic strains of types B and F) Basic Characteristics Properties (Clostridium botulinum) Ammonia Production Positive (+ve) 20% Bile Negative (-ve) Capsule Negative (-ve) Catalase Negative (-ve) Flagella Peritrichous Gelatin Hydrolysis Positive (+ve) Gram Staining Gram-positive H2S Positive (+ve) Hemolysis Positive (+ve). β-hemolytic Indole Negative (-ve) Milk Digestion … Read moreBiochemical Test of Clostridium botulinum