18 Questions
Which scientists formally articulated the concept of cell theory in 1839?
Schleiden and Schwann
According to the seven major components of cell theory, what is the fundamental unit of structure and function in all living organisms?
Cell
What is a key limitation of the cell theory as stated in the text?
Structure of viruses
According to the cell theory, where is DNA specifically found in cells?
Chromosome
What does the cell theory propose about metabolism (energy flow) in cells?
It occurs within cells
Which statement best describes the origin of new living cells according to cell theory?
By division from pre-existing cells
Which aspect of cell theory is contradicted by the existence of prokaryotic cells?
Presence of well-defined nucleus in every cell
How do tapetal cells challenge the traditional understanding derived from the cell theory?
By being multinucleate
What is a notable characteristic of human Red Blood Cells according to the discussion about limitations of the cell theory?
They lack nuclei
According to Schleiden and Schwann, what was considered the functional unit of the body in living organisms?
A cell with a well-defined nucleus
How do viruses challenge the concept of the functional unit in living organisms proposed by Schleiden and Schwann?
Viruses only 'come alive' when hosted by other cells
What aspect of the origin of the first cell is not addressed by the cell theory?
How and where the first cell originated
What stains lightly and contains active DNA?
Euchromatin
Which structure is involved in detoxification in liver cells?
Rough endoplasmic reticulum
Where does oxidative phosphorylation occur during aerobic respiration?
Mitochondrial matrix
What cellular structure increases surface area for absorption or secretion of substances?
Microvilli
Which organelle forms polysomes or polyribosomes?
Endoplasmic reticulum
What organelle is responsible for processing enzymes and proteins to be secreted from the cell?
Golgi apparatus
Learn about eukaryotic organisms, membrane-bound organelles, and the concept of cell theory in biology. Explore the different types of eukaryotic organisms and their functions.
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