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Biology chapter 3
Biology study stack chapter 3, review for freshman seminar, covers 3.1 and 3.2
Question | Answer |
---|---|
What is the most basic unit of life? | cells |
Why can't most cells be seen without a microscope? | because most cells are microscopic |
What did Anton Van Leeuwenhoek call single-celled organisms? | animalcules |
Who determined that all animals are made of cells? | Schwann |
Who corrected Schwann's incorrect theory about cells? | Virchow |
What are the three components of the cell theory? | 1) all organisms are made of cells 2)all living cells are produced by other living cells 3) the cell is the most basic unit of life |
As far as the storage of DNA goes, what differs between eukaryotic and prokaryotic cells? | Prokaryotes-DNA storage in the cytoplasm Eukaryotes- DNA storage in the nucleus |
Which kind of cell has membrane-bound organelles? | Eukaryotic |
Which kind of cell has a cell wall? | Prokaryotes |
Which kind of microscopes usually have the most magnification, compound or single lens? | compound |
What is a cell's internal support system called? | cytoskeleton |
What is the cytoskeleton composed of? | small protein sub-units that form fibers that cross the cell |
What are the main types of fibers in the cytoskeleton? | microtubules, intermediate filaments, and micro filaments |
What must the nucleus be able to do? | DNA must be easily accessible, as well as protected |
Where are ribosomes assembled? | In the nucleolus |
What is the nucleolus? | a dense region in the nucleus |
What is the Endoplasmic Reticulum? | An interconnected network of folded membranes |
What is the function of the Endoplasmic Reticulum? | To produce proteins and lipids |
What is the Endoplasmic Reticulum called if it has no attached ribodomes? | smooth ER |
What is the Endoplasmic Reticulum called if it has attached ribodomes? | rough ER |