Biology Semester A Review

Front

What is a eukaryotic cell?

Back

A eukaryotic cell is a type of cell that has a nucleus and membrane-bound organelles, distinguishing it from prokaryotic cells.

Front

What does homeostasis mean in the context of living organisms?

Back

Homeostasis refers to the ability of living organisms to maintain a stable internal environment despite external changes.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes are proteins that speed up chemical reactions by lowering the activation energy required for the reaction to occur.

Front

What are carbohydrates and their primary function in the body?

Back

Carbohydrates are organic compounds that serve as the body's main source of energy.

Front

What is DNA and where is it found in a cell?

Back

DNA (deoxyribonucleic acid) is the molecule that contains the genetic instructions for the development and function of living things, found in the nucleus of eukaryotic cells.

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 significance of maintaining homeostasis?

Back

Maintaining homeostasis is crucial for the survival of organisms as it allows them to function optimally in varying environmental conditions.

Front

How do enzymes affect the rate of chemical reactions?

Back

Enzymes increase the rate of chemical reactions by providing an alternative pathway with a lower activation energy.

Front

What are the main types of carbohydrates?

Back

The main types of carbohydrates are sugars (simple carbohydrates), starches (complex carbohydrates), and fiber.

Front

What is the structure of DNA?

Back

DNA has a double helix structure, consisting of two strands of nucleotides twisted around each other.