Pre-AP:Grade 9

Which of the following is responsible for the cohesive property of water?

• Hydrogen bonds between the oxygen atoms of two adjacent water molecules

• Covalent bonds between the hydrogen atoms of two adjacent water molecules

• Hydrogen bonds between the oxygen atom of one water molecule and a hydrogen atom of another

  water molecule

• Covalent bonds between the oxygen atom of one water molecule and a hydrogen atom of another

  water molecule

• Hydrogen bonds between water molecules and other types of molecules

Which of the following is an accurate description of the process shown in Figure 1 ?

• The linking of amino acids with an ionic bond as an initial step in the protein synthesis process

• The formation of a more complex carbohydrate with the covalent bonding of two simple sugars

• The hydrolysis of amino acids with the breaking of covalent bonds with the release of water

• The formation of a covalent peptide bond in a dehydration synthesis reaction

Which of the following best describes the formation of the bond shown in Figure 1 ?

• An ionic bond is formed between a carbon atom of one amino acid and the nitrogen atom of the other amino acid.

• An ionic bond is formed when the negative charge of an OH group is balanced by the positive charge of a hydrogen ion.

• A covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H20.

• A covalent bond is formed that replaces the hydrogen bond between the OH group and the H atom.

The synthesis of protein or carbohydrate polymers always produces which of the following as a

byproduct?

• ATP

• Oxygen

• Carbon dioxide

• Water

Write the name of the bond between monosaccharides.

Define hydrolysis.

List 3 common properties of living organisms.