Biochemistry P.2

Phospholipids are a type of lipid. Where would you find them in your body?

• The cell nucleus

• The cell membrane

• The mitochondria

• The ribosomes

Look at the picture. Which part of the phospholipid molecules if hydrophilic?

• phosphate group

• tail (fatty acid chain)

• Head (glycerol+phosphate group)

What term is used to describe the property of phospholipid heads being attracted to water?

• Hydrophobic

• Hydrophilic

• Lipophobic

• Lipophilic

What is the main function of nucleic acids?

• To provide energy to cells

• To code for building proteins and traits

• To assist in cell division

• To protect cells from viruses

What is the monomer unit of nucleic acids?

• Amino acid

• Nucleotide

• Fatty acid

• Monosaccharide

Which of the following is NOT a component (part) of a nucleotide?

• Pentose sugar

• Phosphate group

• Base (nitrogen molecule)

• Amino group

Proteins function to aid the health of which of the following?

• Skin, hair, and nails

• Eyesight

• Bone density

• Nerve function

What is the monomer of proteins?

• Nucleotides

• Amino acids

• Fatty acids

• Sugars

How many different amino acids do organisms use to build proteins?

• 10

• 12

• 20

• 22

How many amino acids can your body make?

• 8

• 10

• 12

• 20