Prokaryotic and Eukaryotic Cell Concepts

Miss Lopez introduces unit two, focusing on cells as the working units of life. The video covers the cell theory, the evolution of eukaryotic cells, and the endosymbiotic theory. It explains the structure and function of cells, comparing prokaryotic and eukaryotic cells, and discusses the formation of organelles like mitochondria and chloroplasts through endosymbiosis.

What is the primary focus of the endosymbiotic theory?

• The development of the cytoskeleton

• The origin of the cell wall

• The formation of the nuclear envelope

• The acquisition of mitochondria and chloroplasts

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

• Cells can arise spontaneously

• All organisms are composed of cells

• All cells come from pre-existing cells

• Cells are the fundamental units of life

What does it mean when eukaryotes are described as monophyletic?

• They are unrelated to archaea

• They have multiple branches on the tree of life

• They share a common ancestor with bacteria

• They form a single branch on the tree of life

Which feature is NOT associated with the evolution of eukaryotic cells?

• Flexible cell surface

• Acquisition of organelles by endosymbiosis

• Development of a rigid cell wall

• Formation of the nuclear envelope

What process allows eukaryotic cells to engulf and digest other cells?

• Phagocytosis

• Mitosis

• Osmosis

• Photosynthesis

Which of the following is a key difference between prokaryotic and eukaryotic cells?

• Presence of DNA

• Presence of a membrane-bound nucleus

• Presence of a plasma membrane

• Presence of ribosomes

What type of DNA structure is found in prokaryotic cells?

• Single linear chromosome

• Single circular chromosome

• Multiple linear chromosomes

• Multiple circular chromosomes

Which molecule is the cell wall of prokaryotes primarily composed of?

• Lignin

• Cellulose

• Chitin

• Peptidoglycan

What is a common feature shared by both prokaryotic and eukaryotic cells?

• Presence of a nuclear envelope

• Presence of ribosomes

• Presence of mitochondria

• Presence of chloroplasts

What process led to the formation of chloroplasts in eukaryotic cells?

• Binary fission

• Endosymbiosis

• Mitosis

• Meiosis