EVERYDAY SCIENCE

Detailed explanation-1: -Endospore Structure The outer proteinaceous coat surrounding the spore provides much of the chemical and enzymatic resistance. Beneath the coat resides a very thick layer of specialized peptidoglycan called the cortex.

Detailed explanation-2: -Endospores are resistant to the chemical agents, e.g., triphenylmethane dyes, and can even protect the bacterial cells against ultraviolet radiation, extreme pH gradients, drought, and nutrition depletion.

Detailed explanation-3: -The structure of the spore protects the genomic DNA from intense heat, radiation, and attack by most enzymes and chemical agents. In fact, bacterial spores are so resistant to environmental factors that they can exist for centuries as viable spores.

Detailed explanation-4: -Nevertheless, endospores are formed almost exclusively by low G+C Gram-positive bacteria, including the genera Bacillus, Clostridium, Thermoactinomyces, Sporolactobacillus, and Sporosarcina.