Biology Semester 1 Review

Front

What is the role of actin and myosin in muscle contraction?

Back

They are proteins that interact to cause muscle fibers to contract.

Front

What is the best definition of differentiation?

Back

The process by which cells specialize for specific functions.

Front

Why is the tertiary structure of a protein important?

Back

It determines the protein’s shape and function.

Front

How do tissues and organs differ in biological organization?

Back

Tissues are made of specialized cells; organs are made of multiple tissues.

Front

Which proteins are directly responsible for muscle contraction?

Back

Actin and Myosin.

Front

What is the function of enzymes in biological systems?

Back

Enzymes are catalysts that speed up chemical reactions in the body.

Front

Define homeostasis in biological terms.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment.

Front

What is the primary function of the cell membrane?

Back

The cell membrane regulates what enters and leaves 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 them.

Front

What is the role of ribosomes in a cell?

Back

Ribosomes are responsible for protein synthesis.