Chemistry of biology Practice Test

Match the following macromolecules to their monomers:

• Fatty acids

• Lipids

• Monosaccharides

• Nucleic acids

• Nucleotides

• Carbohydrates

• Amino acids

• Proteins

Tags

HS-LS1-6

One of the functions of carbohydrates is to provide ​ (a)   term energy. On the other hand, lipids provide ​ (b)   term energy.

• short
• long

Answer explanation

I always remember because carbohydrates can be shortened into "carbs"

and Lipids starts with "L" just like "long"

Tags

HS-LS1-6

A monomer is ​ (a)   building block of a macromolecule. A polymer is made of ​ (b)   repeating units.

• one
• many

Tags

HS-LS1-6

What macromolecule is involved in nearly every function in the humans life?

• protein

• carbohydrates

• lipids

• nucleic acid

What is the monomer unit of protein?

• monosaccharide

• amino acid

• fatty acid

• nucleic acid

Biological buffers work to keep pH in your body in a range of?

• 4.5-5.5

• 5.5-6.5

• 6.5-7.5

• 7.5-8.5

What causes a molecule to be polar?

• an equal sharing of electrons between atoms

• a symmetrical molecular shape

• a lack of electrons

• an unequal sharing of electrons between atoms

An enzyme speeds up a reaction by

• lowering the activation energy.
• raising the activation energy.
• releasing energy.
• absorbing energy.

How does temperature influence enzymes activity?

• higher temperatures always increase enzyme activity

• temperature has no effect on enzymes activity

• lower temperatures lead to faster enzyme activity

• enzymes work optimally at a specific temperature, and extreme temperature can denature enzymes

The hydrogen oxygen and carbon atoms in a glucose molecule are held together by

• covalent bonds

• ionic bonds

• chemical bonds

• ions