The pigment that gives red algae their characteristic color is: MCQ with Answer and Explanation

Explanation:
Saccharomyces cerevisiae, commonly called baker's yeast, ferments sugars to produce CO₂ and ethanol. The CO₂ causes dough to rise, giving bread its porous texture. Lactobacillus is used in yogurt and cheese making, Aspergillus niger in citric acid production, Streptococcus in some dairy ferments. Yeast is a unicellular fungus. Fermentation is an anaerobic process. Alcohol evaporates during baking.

Explanation:
Mitochondria produce ATP through oxidative phosphorylation in the inner membrane. They are double-membrane organelles with their own DNA (mtDNA) and 70S ribosomes, supporting the endosymbiotic theory. The Krebs cycle occurs in the mitochondrial matrix. Nucleus controls cell activities, ribosomes synthesize proteins, Golgi apparatus packages and modifies proteins. Mitochondria are abundant in energy-demanding cells like muscle cells.

Explanation:
Chlorophyll a and b absorb red and blue light and reflect green, giving leaves their color. Carotenoids are yellow/orange, anthocyanins red/purple.