$1.$ Which of the following statements is false about the properties of lipids?

A$.$ Triglycerides consist of a glycerol molecule attached to three fatty acids.

B$.$ Lipids are examples of polar molecules and dissolve in water.

C$.$ Unsaturated fatty acids contain one or more double bonds.

D$.$ Phospholipids consist of a polar head an nonpolar tail.

E$.$ Triglycerides can be liquid or solid at room temperature, depending on their saturation.

$2.$ Surface tension is a property of water best described as$...$

A$.$ The ability of water to both absorb and release a large amount of heat without dramatic changes in temperature.

B$.$ The amount of heat required to convert water from a liquid to a gas state.

C$.$ The collective force from hydrogen bonds between adjacent water molecules give water a cohesive property, enabling tiny insects to float.

D$.$ The ability of water to dissolve polar substances.

$3.$ Which of the following describes nonpolar covalent bond?

A$.$ The attraction between two oppositely charged molecules.

B$.$ The attraction between nonpolar substances when placed in water,

C$.$ The bond formed between two adjacent polar molecules.

D$.$ Equal sharing of electrons between two atoms.

E$.$ Unequal sharing of electrons between two atoms, one of which is highly electronegative.

$4.$ When the body has excess carbohydrates, it stores it in the form of $\_\_\_\_,$ the storage site of which is the liver and skeletal muscle.

A$.$ Glucose B$.$ ATP C$.$ glycogen D$.$ nucleic acids E$.$ lipids

$5.$ An isotope is a version of an element that varies in its number of:

A$.$ Atoms B$.$ molecules C$.$ Protons D$.$ Neutrons E$.$ electrons

$6.$ Noble gases, such as Helium, are chemically inert and do nor form bonds with other elements because...

A$.$ They have an unpaired electron in the outermost energy shell.

B$.$ They have a full number of valence electrons and satisfy the octet rule.

C$.$ They have a positive charge after losing an electron.

D$.$ They have a negative charge after gaining an electron.

E$.$ They emit energy as they decay and become stable.

$7.$ What type of chemical bond forms between an anion and a cation?

A$.$ Ionic bond B$.$ hydrogen bond C$.$ polar covalent bond D$.$ nonpolar covalent bond

$8.$ In a catabolic reaction, $\_\_\_\_$ substances are converted into $\_\_\_\_$ substances.

A$.$ Larger; smaller B$.$ Smaller; larger

$9.$ The second law of thermodynamics states when energy is transformed, some energy is always lost in the form of:

A$.$ Chemical energy B$.$ Kinetic energy C$.$ Potential energy D$.$ Heat