Semester Exam Review Unit 1

Front

What is a characteristic that prokaryotes and eukaryotes share?

Back

Cell membrane, DNA, and ribosomes are shared characteristics. The nucleus is NOT shared.

Front

What organelle directs all cell activities?

Back

The nucleus directs all cell activities through the DNA located there.

Front

What type of cell is characterized by the absence of a nucleus?

Back

Prokaryote.

Front

What is the active site of an enzyme?

Back

The active site is the region on the enzyme where the substrate binds.

Front

What is the first step in any viral infection?

Back

Attachment is the first step in any viral infection.

Front

What is the function of ribosomes?

Back

Ribosomes are responsible for protein synthesis in the cell.

Front

What is the difference between prokaryotic and eukaryotic cells?

Back

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have both.

Front

What is the role of lysosomes in a cell?

Back

Lysosomes contain enzymes that break down waste materials and cellular debris.

Front

What is the function of mitochondria?

Back

Mitochondria are the powerhouse of the cell, generating ATP through cellular respiration.

Front

What is a substrate in enzyme activity?

Back

A substrate is the reactant that an enzyme acts upon.