Now suppose that light in the yellow range of wavelengths (approximately 577 nm to 597 nm) enters the eye and strikes the retina. Light with these wavelengths would activate both the green and the red cones of the retina.
Brewer's yeast. Uses. Brewer's yeast is traditionally used as a source of vitamin B, selenium, and chromium, especially by vegetarians. Clinical trials have evaluated yeast for a role in immunomodulation, respiratory infections, prevention of postsurgical infections (as beta-glucan), and as a source of dietary fiber to improve the lipid profile.
The difference is that wine yeast has been bred to withstand higher levels of alcohol. Bakers yeast (for example) will produce alcohol but the yeast will die off before getting much higher than 4%. Brewer's yeast is a different strain than baker's yeast, and meant, as the name implies, for brewing beer.