Biochemistry

Which of the following are located in the nucleus of atoms?

• Protons and Neutrons

• Electrons and Protons

• Neutrons and Electrons

• Protons, Electrons, and Neutrons

All life on Earth is composed mostly of_______.

• carbohydrates

• oxygen

• proteins

• water

Elements are pure substances made up of _________ with the same number of protons.

Fats, oils, and waxes are classified as_______.

Amino acids are the building blocks of __________.

_________ are made up of chains of nucleotides.

Atoms that have more electrons than protons are_______.

• polymers

• neutral

• positively charged

• negatively charged

Which of the following consisits of a sugar, a base, and a phosphate group?

• an amino acid

• a nucleotide

• a saturated lipid

• a monosaccharide

_________ causes surface tension in water.

Organisms only need an extremely small amount of _____________.

• trace elements

• proteins

• glucose

• carbon