The Cell: Endoplasmic Reticulum and Ribosomes

The video explains the analogy between a network of roads and the endoplasmic reticulum in cells, highlighting its role in transporting materials like proteins. It describes the structure of the endoplasmic reticulum and the function of ribosomes in protein production. The importance of proteins in speeding up chemical reactions and controlling cell growth and repair is also discussed.

What is the primary function of the endoplasmic reticulum in a cell?

• To protect the cell from damage

• To produce energy

• To transport materials like proteins

• To store genetic information

Where are ribosomes primarily located in a cell?

• Inside the nucleus

• Attached to the endoplasmic reticulum and scattered in the cytoplasm

• On the cell membrane

• Within the mitochondria

What is the main role of ribosomes in the cell?

• To break down waste materials

• To direct the production of proteins

• To transport oxygen

• To store nutrients

How do proteins affect chemical reactions in the cell?

• They have no effect on reactions

• They stop reactions completely

• They slow down reactions

• They speed up reactions

In addition to speeding up reactions, what is another function of proteins in the cell?

• They transport waste out of the cell

• They control cell growth and repair

• They produce genetic material

• They store energy