Diphtheria is a highly contagious bacterial infection caused by Corynebacterium diphtheriae. It primarily affects the mucous membranes of the nose and throat, producing a thick gray pseudomembrane. The bacteria also produce a potent exotoxin that can damage the heart, kidneys, and nervous system. It is preventable by the DPT vaccine.
Explanation:
Fibrous root systems consist of a dense network of thin, branching roots originating from the stem base, typical of monocots like grasses. Taproot system has a main central root (dicots). Adventitious roots arise from stems or leaves, prop roots are supportive. Fibrous roots are effective in preventing soil erosion.
Explanation:
Adenosine triphosphate (ATP) stores and transfers energy in cells via high-energy phosphate bonds. Hydrolysis of ATP to ADP releases energy for endergonic reactions. Glucose and NADH/FADH₂ are energy sources but not direct energy carriers usable by most enzymes; ATP is the immediate energy donor.
Explanation:
Howard Temin and David Baltimore independently discovered reverse transcriptase in retroviruses in 1970, an enzyme that synthesizes DNA from RNA. Watson and Crick DNA structure, Mullis PCR.
No comments yet. Be the first to start the discussion!