Macromolecules, Enzymes, and Properties of Water

A molecule in which opposite ends have opposite electric charges is called .....

• cohesion

• polar molecule

• hydrogen bond

• solution

Answer explanation

It is a polar molecule because of the unequal sharing of electrons creating a slightly negative pole and a slightly positive pole in the same molecule.

The type of bond between the oxygen and hydrogen atoms in a water molecule due to the sharing of electrons

• ionic

• covalent

• hydrogen

Tags

NGSS.MS-PS1-1

A bond created by the weak attraction of a slightly positive hydrogen atom to a slightly negative portion of another molecule is called ..........

• polar molecule

• adhesion

• hydrogen bond

Answer explanation

Hydrogen bonds are due to water molecules being polar.

Which of the following elements are found in all macromolecules? (Select all that apply).

• 
• 
• 
• 

Tags

NGSS.HS-LS1-6

A monomer is ​ (a)   building block of a polymer. A polymer is made of ​ (b)   repeating monomers that can be the same or different. Large polymers that are found in living things are called ​ (c)   .

• one

• many

• macromolecules

Tags

HS-LS1-6

Enzymes are types of​ (a)   that ​ (b)   chemical reactions by​ (c)   the amount of activation energy required to start the reaction.

• proteins

• speed-up

• decreasing

• carbohydrates

• increasing

• slow-down

Label the parts of the enzyme model

a

b

c

d

Products

Active site

Substrate

Enzyme

What happens to an enzyme when it is denatured?

• Activation energy is lowered.

• It becomes stronger.

• It loses its shape.

• Activation energy is raised.

Which color line represent a reaction with an enzyme present?

• Blue

• Red

• Both

Match the following Properties of Water

• universal solvent

• 
• high heat capacity

• can dissolve many substances

• adhesion

• water molecules attracted to water molecules

• cohesion

• water molceules attracted to other molecules

• frozen water is less dense

• waters ability to retain heat

Tags

NGSS.HS-ESS2-5