When amino acids are used for energy, they can still be utilized for building muscle tissue. A. True
B. False

False.

Explanation:

It is false because the energy source of the body are carbohydrates and lipids. Carbohydrates and lipids supply energy to the body to perform biological activities and amino acids link to form protein and are the building blocks of the body which make up to about 75% of the body.

Amino acids can provide energy at 4Kcal/g which obtained by partial degradation of muscle protein and can not be use for building muscles at the same time because it is not stored in the body.

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.

the answer is :