Chemistry of Life

Multiple Choice

Why is it important to understand the essential chemistry concepts such as bonding, polarity, and subatomic particles in the study of biology?

• Because they help explain how biological molecules interact and function

• Because chemistry is unrelated to biology

• Because only chemists need to know about these concepts

• Because these concepts are only important in physics

Multiple Choice

Which of the following is considered the most basic unit of life?

• Cell

• Atom

• Organ

• Tissue

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Multiple Select

Which of the following elements are necessary for life?

• Carbon

• Hydrogen

• Helium

• Sulfur

Drag and Drop

Making bonds​

Placeholder

energy and Breaking bonds​

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energy

Drag these tiles and drop them in the correct blank above

stores

releases

Multiple Choice

Which of the following best describes a polar molecule?

• It has a charge which makes it "sticky"

• It has no separation of charge.

• It does not dissolve in water.

• It is always a gas.

Multiple Choice

Attractions between water molecules are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Multiple Select

Which of the following statements about water are correct?

• Water is made of two hydrogen atoms and one oxygen atom.

• Water is a polar molecule.

• Water does not dissolve in water.

• Water is critical for life’s processes.

Multiple Choice

What type of bond forms between the negative oxygen end of one water molecule and the positive hydrogen end of another water molecule?

• Covalent bond

• Ionic bond

• Hydrogen bond

• Metallic bond

Multiple Select

Which of the following are characteristics of hydrophilic substances?

• Have an affinity for water

• Usually dissolve easily in water

• Usually nonpolar

• Example: salt and sugar

Multiple Choice

When something is 'water fearing' it is....

• Hydrophobic
• Hydrophilic 
• Hydroelectric 
• Hydrochloric

Multiple Choice

If a surface absorbs and attracts water molecules it is....

• clear

• a leaf

• hydrophobic

• hydrophilic

Multiple Choice

Which picture shows a water droplet on a hydrophobic surface?

• A

• B

• neither

• both

Multiple Choice

Which picture shows a hydrophilic surface?

• A

• B

• neither

• both

Multiple Choice

When a molecule has an opposite electrical charge on each end, it is known as what?

• cohesion
• polar molecule
• hydrogen bond
• solution