sweet taste is elicited by many organic substances including sugar,saccharin, alcohols some amino acids, and some lead salts.
#2. sour taste is produced by acids, specifically their hydrogen ions in solution.
#3. Salty taste is produced by metal ions (inorganic salts); table salt taste the "saltiest".
#4. Bitter taste is elicited by alkaloids (such as quinine, nicotine,caffeine, morphine, and strychnine) as well as a number of non alkaloid substances such as aspirin.
#5. Umami (U-mam'e "delicious"),a subtle taste discovered by Japanese is elicited by amino acid glutamate aspartate which appear to be responsible for the"beef taste" of steak the characterisic tang of aging cheese, and the flavor of the food additive monosodium glutamate.
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The five basic taste sensations are sweet (sugars), sour (acids), salty (salts), bitter (alkaloids), and umami (amino acids such as glutamate). Additionally, some sources recognize a sixth taste sensation called "fat" or "oleogustus" associated with fatty acids.
All bacteria produce chemicals. Could you possibly be more specific?
It wouldn't taste nice
The brain is the endpoint for all conscious sensations from limbs. Signals from sensory receptors in the limbs travel through the spinal cord to the brain, where they are processed and interpreted as different sensations such as touch, pain, or temperature.
The two structures that produce chemicals that can kill bacteria are lysosomes and peroxisomes. Lysosomes contain enzymes that can break down bacterial cell walls, while peroxisomes produce hydrogen peroxide, which has antimicrobial properties.
Sweetness was previously believed to reside only at the tip, however newer research shows that taste occurs for all five sensations over the entire surface of the tongue.