Explain: how do muscles work in pairs to move the body?

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

1. watermelon, papaya, oranges, bananas, and lemons are included in this food group. vitamin c 2. you need 6 or more servings of this food group each day vitamins d and a 3. found in fruit and keeps blood vessels healthy calcium 4. vitamins found in milk bread and grain 5. a mineral that strengthens bones fruit

Omg substrates with the same size and shape as the active site will bind to the enzyme. why is the key labeled the “bad” substrate?