Biology: Cell Theory and Classification

The video provides an overview of cells, introducing the cell theory and its historical development. It explains the three main components of the cell theory: all living things are made of cells, cells are the basic unit of life, and all cells come from pre-existing cells. The video compares prokaryotic and eukaryotic cells, highlighting their differences in structure and function. It also discusses unicellular and multicellular organisms, and introduces the concept of organelles, which are specialized structures within cells.

Who coined the term 'cell' when observing cork under a microscope?

• Theodor Schwann

• Anton van Leeuwenhoek

• Robert Hooke

• Matthias Schleiden

What was the key invention that led to the development of cell theory?

• Centrifuge

• X-ray machine

• Microscope

• Telescope

Which of the following is NOT a component of the cell theory?

• All living things are made of one or more cells

• Cells are the basic unit of life

• All cells come from pre-existing cells

• Cells can spontaneously generate

According to the cell theory, what is the basic unit of life?

• Tissue

• Organ

• Organism

• Cell

Which type of cell lacks a nucleus?

• Prokaryotic

• Eukaryotic

• Both

• Neither

What is a characteristic of eukaryotic cells?

• Their DNA is circular

• They are always unicellular

• They lack membrane-bound organelles

• They have a true nucleus

Which of the following is an example of a prokaryotic organism?

• Bacteria

• Plants

• Animals

• Fungi

What term describes organisms made up of many cells?

• Prokaryotic

• Multicellular

• Eukaryotic

• Unicellular

Which organelle is found in both prokaryotic and eukaryotic cells?

• Nucleus

• Mitochondria

• Ribosome

• Chloroplast

Where is DNA found in eukaryotic cells?

• Ribosome

• Cell membrane

• Nucleus

• Cytoplasm