The reactants of enzyme-catalyzed reactions are known as

The correct answer is: substrates

Enzymes are molecule catalysts (usually proteins) with the ability to speed up a chemical reaction by lowering activation energy. Enzymes don’t undergo any permanent chemical change. Reactants of an enzymatic reaction are substrates and they are being changed through the reaction, forming the product of the reaction.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

satellites are frequently used to make observations of the orbit on earth