Chemistry in Biology

What is the building block of matter?

• molecule
• atom
• DNA
• enzyme

Tags

NGSS.MS-PS1-1

The tyndall effect can be seen in colloids.

• True
• False

A neutron has a _______ charge. 

• positive 
• negative
• neutral
• basic

In cells, buffers maintain a pH level of 6.5-7.5.

• True
• False

This substance speeds up chemical reactions.

• steroid
• buffer
• RNA
• enzyme

Tags

NGSS.HS-PS1-5

Particles in a suspension eventually settle to the bottom.

• True 
• False

Tags

NGSS.MS-PS2-4

This property of water describes it having two poles.

• solvent
• adhesion
• polarity
• cohesion

Why is water considered the universal solvent?

• It has the ability to dissolve many substances.
• It can form bonds with molecules in other substances. 
• It can form bonds with other water molecules.
• It has two opposite poles.

Tags

NGSS.HS-PS1-3

What is a buffer?

• A substance that reacts with acids. and bases
• A substance that speeds up reactions.
• A substance made of nucleotide.
• A substance made of amino acids.

Amino acids make up ______.

• nucleic acids
• proteins
• carbohydrates
• lipids

Tags

NGSS.HS-LS1-6