Day 5 Quiz

First and Last name

Which of the following is a unique property of water?

• its high surface tension
• its ability to absorb large amounts of heat
• its ability to dissolve many polar compounds
• all of the above

How does the strength of intramolecular bonds within a water molecule compare to the strength of intermolecular bonds between water molecules?

• The intermolecular bonds between water molecules are stronger than the intramolecular bonds within a water molecule.
• The intramolecular bonds within a water molecule are stronger than the intermolecular bonds between water molecules.
• While water molecules are held together by intramolecular bonds, there are no intermolecular bonds between water molecules.
• The strength of both intramolecular and intermolecular water bonds of water molecules is the same.

What gives water most of its unique properties?

• its high boiling point
• the oxygen in its molecular structure
• the polarity between the oxygen and hydrogens
• hydrogen bonding between water molecules

When table salt dissociates, it forms two charged ions. These charges are attracted to the charges in a water molecule, allowing the salt to dissolve. This attraction of charges to water can dissolve many substances. This occurs because

• salt binds to water molecules.
• salt is a polar molecule.
• water dissociates into hydrogen and hydroxide ions.
• water is a polar molecule.

The _______ charge around a hydrogen atom in a water molecule is attracted to the ________ charge around a neighboring oxygen atom.

• positive, negative
• negative, negative
• positive, positive
• negative, positive

In which part of the chloroplast does photosynthesis take place?

• Stroma
• Intermembrane space
• Cytoplasm
• Thylakoids

What is the name for the total process of turning the sun’s energy into “food”?

• chloroplasts
• photosynthesis
• calvin cycle
• light reactions

The initial role of chlorophyll is to

• capture electrons
• synthesize sugar
• fix carbon dioxide
• absorb light energy

Select all possible answers: Which is true concerning chloroplasts?

• The light reactions occur in the thylakoid membranes.
• Each chloroplast contains stacks of thylakoids called grana.
• The thylakoid membranes contain photosystems.
• The Calvin cycle occurs in the stroma.