Prokaryotic Cells: Structure, Functions, and Characteristics

Professor Dave explains prokaryotic cells, their structure, and functions. He covers the plasma membrane, cell wall, cytoplasm, and genetic material. The video discusses protein synthesis, enzymatic functions, and the importance of cell size. It concludes with a comparison to eukaryotic cells.

What is the primary characteristic of the first living organisms on Earth?

• They had complex organ systems.

• They were made of a single cell.

• They were eukaryotic.

• They were multicellular.

What is the main function of the plasma membrane in prokaryotic cells?

• To regulate the movement of substances in and out of the cell.

• To store genetic information.

• To provide structural support.

• To produce energy for the cell.

What is the cell wall of most prokaryotes made of?

• Cellulose

• Lignin

• Chitin

• Peptidoglycan

Where is the genetic information of a prokaryotic cell located?

• In the nucleus

• In the nucleoid

• In the mitochondria

• In the chloroplasts

What is the role of ribosomes in prokaryotic cells?

• To transport substances

• To synthesize proteins

• To replicate DNA

• To store energy

Why do cells need a high surface area to volume ratio?

• To grow larger in size

• To store more nutrients

• To maximize exchange with the environment

• To increase genetic material

What is the approximate size of a typical prokaryotic cell?

• One hundredth of a millimeter

• One meter

• One centimeter

• One millimeter

Which of the following is a characteristic of eukaryotic cells?

• They are found in multicellular organisms.

• They have a cell wall made of peptidoglycan.

• They lack a nucleus.

• They are always unicellular.

What type of organisms are made up of prokaryotic cells?

• Fungi and algae

• Plants and animals

• Bacteria and archaea

• Viruses and prions

How do prokaryotic cells differ from eukaryotic cells in terms of cellular organization?

• Prokaryotic cells have a nucleus.

• Eukaryotic cells are always unicellular.

• Eukaryotic cells have a cell wall made of peptidoglycan.

• Prokaryotic cells lack membrane-bound organelles.