chemistry of life

Inhibitors of enzymes cause enzymes to become inactive because they block the

• substrate
• enzyme
• active site
• chemical site

Atoms in molecules share pairs of electrons when they make

• covalent bonds.
• ionic bonds.
• hydrogen bonds.
• polymers.

Tags

NGSS.HS-PS1-2

The smallest basic unit of matter is the

• molecule.
• atom.
• compound.
• cell.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Both animal fats and plant oils are made up of glycerol and

• phospholipids.
• fatty acids.
• polar molecules.
• saturated fats.

The four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, and

• starches.
• fatty acids.
• monosaccharides.
• proteins.

Tags

NGSS.MS-LS1-7

Which of the following is NOT an organic compound?

• C₆H₁₂O₆
• H₂O
• CH₄
• C₂H₄O₂

Tags

NGSS.HS-LS1-6

These three elements make up carbohydrates

• carbon, helium, oxygen
• nitrogen, oxygen, water
• carbon, hydrogen, oxygen
• nitrogen, carbon, water

Tomato juice has a pH of 4. Determine if it's an acid, base, or neutral. 

• acid
• base
• neutral 

What does  the lock-and-key model state?

• any substrate can bind an enzyme 
• only specific amino acids can build carbohydrates 
• specific substrates bind specific enzymes 
•  nucleotides must fit like a lock and a key 

Which aspect of a chemical reaction is affected by enzymes?

• direction
• rate
• equilibrium
• pH

Tags

NGSS.HS-PS1-5