Exam 3: Chemistry of Life

Using the answer choices below,match the characteristic with its macromolecule class. -used to create steroid molecules like cholesterol

In living systems,a critical component of many reactions is

A solution with a pH of 4 is ________ acidic than a solution with a pH of 5.The solution with the pH of 4 has a ________ concentration of hydrogen ions than the solution with a pH of 5.

A scientist observed a chemical that changes to bright red in the presence of organic compounds containing nitrogen and phosphorus.To test this chemical,a set of test tubes each containing a purified sample of one of the following organic compounds is prepared.The chemical is then added to each tube.The test tube containing ________ will always turn bright red.

Using the answer choices below,match the characteristic with its macromolecule class. -act as short-term energetic molecules

A disaccharide consists of two

In making her morning tea,Dorothy drops a sugar cube into the hot water.She stirs the mixture but no longer sees the sugar cube at the bottom of her mug.In this scenario,the sugar is

The most basic solution in the figure shown below is

When ammonia (NH₃)is dissolved in a solution,it accepts hydrogen ions from its surroundings.Ammonia is therefore a(n)

After adding a small amount of Solution A to Solution B,the pH of Solution B declines from 8 to 3.Solution A must contain

The most acidic solution in the figure shown below is

Based on the figure shown below,which of the following has a lower concentration of hydrogen ions?

Using the answer choices below,match the characteristic with its macromolecule class. -function energy storage and structural support

Ionic bonds ________,whereas covalent bonds ________.

Use the molecule of ethanol shown below to match the numbers with the questions they answer.Numbers may be used more than once or not at all. -How many electrons is the oxygen atom sharing?

The subatomic particles that possess a single negative charge and surround the nucleus are the

Nonpolar molecules that are repelled by water are known as ________ molecules.

Using the figure below,contrast the abundance of nitrogen,oxygen,and carbon in Earth's atmosphere and the human body.Address the reason for the difference in the abundance of carbon.

Match the type of bond associated with each description.Terms may be used more than once. -Carbon shares electrons with oxygen atoms in a carbon dioxide molecule.

Antibodies are an important class of human proteins that function in immune defense.If scientists fragmented antibodies under laboratory conditions,what chemical building blocks would they recover?