Biology Ch. 2 Review - Biochemistry

The space surrounding the nucleus of an atom contains

• protons

• neutrons

• electrons

• ions

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Isotopes are atoms of the same element with the same number of protons and

• a different number of electrons

• a different number of molecules

• a different number of neutrons

• the same number of neutrons

Tags

NGSS.MS-PS1-1

Which of the following makes up a molecule of water?

• one atom of hydrogen and one atom of oxygen

• one atom of sodium and one atom of chlorine

• one atom of hydrogen and two atoms of oxygen

• two atoms of hydrogen and one atom of oxygen

Tags

NGSS.MS-PS1-1

A covalent bond is formed as a result of

• transferring electrons

• sharing an electron pair

• transferring protons

• sharing a proton pair

In a water molecule, shared electrons spend more time around the oxygen atom than the hydrogen atoms. As a result, the oxygen atom is

• slightly negative

• very negative

• slightly positive

• very positive

Which role do enzymes play in cells?

• They are bio substrates that speed up chemical reactions

• They are bio substrates that decrease chemical reactions

• They are bio catalysts that decrease the activation energy in chemical reactions

• They are bio catalysts that increase and decrease the activation energy in chemical reactions

Which best explains the relationship between proteins and amino acids?

• Proteins are made of amino acids

• Amino acids are made of proteins

• Proteins contain lipids, nucleic acid, and amino acid

• Amino acids contain lipids, nucleic acid, and proteins

Which biomolecule consists of a Nitrogen-base, a phosphate group, and a 5-Carbon sugar?

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

Fats, phospholipids, and steroids are all examples of which type of biomolecule?

• Carboyhdrates

• Lipids

• Proteins

• Nucleic Acids

This is the molecular structure of cholesterol. Which biomolecule family is it a part of?

• Carbohydrates

• Lipids

• Proteins

• Amino Acids