Exam 2: The Chemistry and Energy of Life

You look at the label on a container of shortening and see the words "hydrogenated vegetable oil." This means that during processing,the number of carbon-carbon double bonds in the oil was decreased.What is the result of decreasing the number of double bonds?

Oil and water do not mix easily because the fat molecules aggregate in water as a result of

Which statement about the exergonic hydrolysis of maltose to glucose is true?

All of the following molecules are examples of the octet rule except

A covalent bond is the sharing of _______ between atoms,whereas an ionic bond is the _______.

How does the second law of thermodynamics apply to organisms?

Fatty acids are molecules that

Molecules containing a large number of hydroxyl groups are

A molecule with the formula C₁₆H₃₀O₁₅ is a

Seeds contain dense aggregates of starch.What role does water play in how the seeds use the stored starch?

Which statement about condensation reactions is false?

Cholesterol is soluble in ether,an organic solvent,but it is not soluble in water.Based on this information,to which class of biological molecules does cholesterol belong?

A fat contains fatty acids and

During photosynthesis,plants use light energy to synthesize sugars from carbon dioxide.Plants do not make new energy;they merely convert it from light energy to chemical energy.This process is an illustration of

You are given a project to devise structural formulas of molecules that will create stable compounds.The most important piece of information about the atoms you will need to consider is

When exposed to extreme heat,the human body relies on _______ to absorb excess heat and maintain normal body temperature.

You have isolated an unidentified liquid from a sample of beans.You add the liquid to a beaker of water and shake vigorously.After a few minutes,the water and the other liquid separate into two layers.To which class of biological molecules does the unknown liquid most likely belong?

Which element has the same number of outer-shell (valence)electrons as oxygen?

The part of the atom that determines how the atom behaves chemically is the

A compound with the molecular formula C₂H₄ has _______ double bond(s).