Review of the Basics

An enzyme is which type of macromolecule?

• protein

• carbohydrate

• lipids

Tags

NGSS.MS-LS1-7

Why are enzymes important to biology?

• They slow down chemical reactions.

• They speed up chemical reactions.

• They keep chemical reaction from occurring.

Tags

NGSS.MS-PS1-2

What is the arrow in the image below pointing at?

• active sites that attach to enzymes

• waste products stuck to an enzyme

• substrate that is attached to the enzyme

Enzymes work by lowering the amount of energy that is needed to start a reaction. That energy is called

• solar energy

• activation energy

• nuclear energy

A physical change in matter is ____.

• a change in the type of chemical.

• a change in the size, shape, or state of matter.

• a change in atoms.

• all the above.

A chemical change in matter is when ___.

• there is a change in size, shape and state of matter.

• when a solid becomes a liquid.

• when there is a new substance formed.

• None of the above

Tags

NGSS.MS-PS1-2

What are chemical properties of matter?

• the ability to melt.

• the ability to change from one type of matter into another.

• the ability to be molded.

• All of the above.

What are some examples of chemical properties?

• Reactivity

• Flammability

• Rust

• All the above

The law of conservation of matter states ___.

• matter can be created and destroyed.

• matter can be neither created or destroyed.

• matter can be created not destroyed.

• None of the above.

Tags

NGSS.MS-PS1-5

How many electrons are in the outer valence level of this atom?

• 2 electrons

• 6 electrons

• 4 electrons

• All the above.

Tags

NGSS.MS-PS1-1