AS Biology Units 1 through 5 review

Front

What are the four levels of protein structure?

Back

1. Primary: Sequence of amino acids. 2. Secondary: Alpha helices and beta sheets. 3. Tertiary: 3D folding of a polypeptide. 4. Quaternary: Assembly of multiple polypeptide chains.

Front

How does water move in relation to water potential?

Back

Water moves from regions of more negative water potential to regions of less negative water potential.

Front

What role do channel proteins play in cellular water movement?

Back

Channel proteins facilitate the movement of water across cell membranes.

Front

Can water pass through cellulose cell walls?

Back

Yes, water can pass through cellulose cell walls.

Front

What is the significance of the active site in enzymes?

Back

The active site is where substrate molecules bind and undergo a chemical reaction.

Front

What are enzyme inhibitors?

Back

Substances that decrease enzyme activity by binding to the active site or another part of the enzyme.

Front

What is the difference between competitive and non-competitive inhibitors?

Back

Competitive inhibitors bind to the active site, while non-competitive inhibitors bind to another site, altering enzyme function.

Front

How do you calculate magnification in microscopy?

Back

Magnification = Size of image / Actual size of object.

Front

What is the actual diameter of a red blood cell in micrometers?

Back

7 μm.

Front

What is the primary structure of a protein?

Back

The primary structure is the linear sequence of amino acids in a polypeptide chain.