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Cell Science
Celll organelles
Question | Answer |
---|---|
What is the smallest unit that can perform all the process necessary for life? | A cell |
Who was the first person to describe cells? | Robert Hooke |
Who discover single-celled organisms including bacteria? | Anton van Leeuwenhoek |
Who concluded that all plant parts were made of cells? | Scientist Matthias Schleiden |
Who concluded that all animials tissue were made of cells? | Theodor Schwann |
Who concluded that all cells came from existing cells? | Rudolf Virchow |
Why can a chicken egg grow so large? | It does not have to take in nutrients |
What limits most cells to a very small size? | The surface area-to-volume ratio of the cell |
How would you calculate the surface-to-volume ratio? | Divide the total surface area of the cell by the cells volume |
What are the three parts of the cell theory? | 1. All organisms are made of one or more cells 2. The cell is the basic unit of all living things 3. All cells come from existing cells |
What Kind of cells have cell walls? | Plants and fungi |
What is the protective layer that covers a cells surface? | Cell membrane |
What is the fluid inside a cell? | Cytoplasm |
What is the name of the structures that performs a specific function in the cells? | Organelle |
What is the genetic material that carries information needed to make new cells or new organisms? | DNA |
What organelle contains the DNA and has a role in growth, metabolism and reproduction? | Nucleus |
What parts do all cells have in common? | Cell membrane, organelles, cytoplasm and DNA |
What are the two basic kinds of cells? | Cells with a nucleus and cells without a nucleus |
What are prokaryotes? | Prokaryotes are single celled organisms that do not have a nucleus or membrane-bound organelles |
What are the most common prokaryotes (and the smalles cells)? | The most common prokaryote are bacteria |
What are ribosomes? | Ribosomes are tiny round organelles made up of protien and other materials |
What is the difference between eubacteria and archaebacteria? | Archaebacteria ribosomes are different from eubacteria ribosomes |
What are three types of archaebactera? | Salt loving, heat loving and methane making |
How do eukaryotes compare in size to prokaryotes? | Eukaryotes are about 10 times larger |
What does eukaryote have that a prokaryote does not? | Cells with a nucleus |
What word can be use to describe humans | eukaryote |
What does multicellular mean? | Mullticellular means many cells |
What is the function of a cell wall? | It is the rigid structure that gives support to the cell |
What are the cells walls of a plant and alage made of? | Cellulose and other materials |
What are the cell walls of a fungi made of? | Chitin |
What is a cell membrane? | It is a protictive barrier that encloses a cell and allows what can go in and out of the cell. |
What are three types of compounds contained in the cell membrane? | Protiens, lipids and phospholipids |
What two substances control the movement of materials into and out of the cell? | Protiens and lipids |
What is a web of protiens in the cytoplasm know as? | Cytoskeleton |
What are the two functions of the cytoskeleton? | It keeps the cell membrane from collapsing and helps move some cells. |