B: used up in the process
When photosynthesis occurs the plant takes in sunlight and CO2 and converts it into (C6H12O6) or sugar and O2
The answer would be - It untwists the double helix and separates the two DNA strands. A helicase is an enzyme used to separate strands of a DNA double helix by breaking hydrogen bonds between annealed nucleotide bases.
They are involved in a chemical digestion.
Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells. It begins in the mouth when food mixes with saliva which contains enzyme salivary amylase that breaks down carbohydrates. It also occurs in the stomach where HCl and pepsin forms chyme and small intestine especially in the duodenum.
Blood born pathogens refer to contaminants in body fluids
Around 4.1 billion years ago the first single celled organism appeared
