Biochem Review Bio SS Online 2020

What refers to the binding (attraction) of 2 substances of the same type?

• adhesion

• cohesion

• solute

• solvent

What does it mean to be a good solvent, like water?

• it can get prevent things from getting dissolved

• it's a good dissolver

• it gets dissolved by other liquids

• all of the above

When two different type of molecules attract and stick together, this is what?

• adhesion

• cohesion

• solute

• solvent

Why can some insects walk on water?

• cohesion of water on the surface

• adhesion of water on the surface

• because water is a good solvent

• because ice floats

Why does ice float?

• water molecules get really close together when turning to ice

• water molecules spin quickly and cause ice to form

• water molecules spread out in a pattern when ice forms and air gets trapped in between

• ice is more dense than water

If a leaf is floating on top of the water, is the leaf more or less dense than the water?

• more dense

• less dense

True or False: Water resists temperature changes.

• true

• false

What does the white part of the water molecule in the picture represent?

• oxygen

• carbon

• phosphorus

• hydrogen

What is used by the body for quick energy?

• carbohydrates

• lipids

• proteins

• nucleic acids

What is used by the body for insulation?

• carbohydrates

• lipids

• proteins

• nucleic acids