stick dis in your brain pls

What is the main function of the cell membrane?

Acts as a barrier and controls what enters and leaves the cell.

What is the cell membrane made of?

Lipids, proteins, and carbohydrates.

What are microtubules?

Large tubes that move vesicles and help with cell division.

What are microfilaments?

Thin filaments that support shape and movement.

What are intermediate filaments?

Durable fibers that strengthen the cell.

What is the function of centrioles?

Form the spindle apparatus during cell division.

What is the function of microvilli?

Increase surface area for absorption.

What is the function of cilia?

Move fluid across the cell surface.

What do free ribosomes make?

Proteins used inside the cell.

What do fixed (attached) ribosomes make?

Proteins for secretion or membranes.

What is the function of rough ER?

Protein synthesis and packaging.

What is the function of smooth ER?

Lipid synthesis, detoxification, calcium storage.

What is the function of the Golgi apparatus?

Modifies, packages, and ships proteins.

What is transcription?

Copying DNA into mRNA in the nucleus.

What is translation?

Using mRNA to build a protein at the ribosome.

What happens during gene activation?

DNA uncoils and the gene is located.

What is a promoter?

A DNA sequence signaling where transcription starts.

What enzyme makes mRNA?

RNA polymerase.