Semi=Final exam. Exam.in BIochemisty( BIOLOGYY)

Biochemistry is define as chemistry of living organism

• True

• False

Living matter has several characteristics: It is structurally complicated yet highly organized

• True

• False

Structure of Water

• two oxygen atom and one hydrogen atom

• one oxygen atom and one hydrogen atom

• two oxygen atom and two hydrogen atom

• two hydrogen atom and one oxygen atom

Water acts as an effective modulator of climatic temperature

• False

• True

This is a substance that changes the rate of a chemical reaction.

• catalyst

• solute

• solvent

For enzymes to work, it has a spot where molecules dock in. What do we call this spot?

• active site

• substrate

• inhibitor

Water is a _________ molecule.

• nonpolar

• polar

What makes water important to life?

Check all that apply.

• The polarity of water makes it good at dissolving things.

• Water can move nutrients around.

• Water dehydrates our body.

This is the attraction of water molecules for each other.

• cohesion

• adhesion

• hydrogen bonding

Of all the elements, ________ is the most significant to life.

• carbon

• hydrogen

• nitrogen