Cells Part 1
What is a cell?
A cell is the smallest functional and structural unit of all living organisms.
What is a unicellular organism? (definition)
A unicellular organism is an organism with only one cell.
Is Mitosis during asexual reproduction or sexual reproduction?
asexual reproduction
What is a cell membrane?
A protective 'shell' or barrier that protects the cell and controls how much oxygen and water enters or leaves the cell.
True or False: Cells do not have a cytoplasm.
False
What is a prokaryote?
A prokaryote is a single-celled organism that does not have a nucleus or membrane-bound organelles.
What study is the cell theory fundamental to?
the study of organisms
What are the four phases of mitosis?
Prophase, Metaphase, Anaphase, Telephase
What is a multicellular organism?
A multicellular organism is an organism with two or more cells to function with.
True or False. Prokaryotes have a nucleus.
False
What is a eukaryote?
A eukaryote is an organism made up of cells that contain their DNA in a nucleus.
Which scientists contributed to the cell theory?
Matthias Schleiden, Theodor Schwann, and Rudolf Virchow
When does the membrane of the nucleus break down?
Prophase
Name 2 parts of a eukaryotic cell.
cell membrane, organelles, cytoplasm, DNA, nucleus, ribosomes, etc.
True or False. Cytokinesis results in two new cells.
True
Why are cells small?
Cells are small because their size is limited by their outer surface area.
What are the three characteristics of the cell theory?
All organisms are made up of one or more cells. The cell is a basic unit of all organisms. All cells come from existing cells.
When do the chromatids separate?
In which process do cells come from other existing cells?
Mitosis
True or False. Meiosis results in the formation of four haploid cells.
True
Why are cells important?
Cells are important because they help function any organism with replication and reproduction.
Who wrote the first two parts of the cell theory?
Theodor Schwann
What happens after telophase?
Cytokinesis
What is the surface area to volume ratio of a cube with sides that are 5 cm long? (simplified)
6 cm^2 : 5 cm^3
True or False: The hairlike structures on some prokaryotic cells are called ribosomes.
False. They are called flagella.