Lactase is a protein that speeds up the chemical reaction that breakdowns lactose sugar. Lactase is an example of: 1.) antibody
2.) carbohydrate
3.) DNA
4.) enzyme

i think it is true since you can test the answer and can use observations to complete it.

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a