Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
What is the cell theory?
|
1. All living things are composed of cells.
2. The cell is the basic functional unit of life. 3. Cells arise only from pre-existing cells. 4. Cells carry genetic information in the form of DNA. --- page 67 |
|
|
What is the function of the diagphragms from microscopes? The course adjustment? The fine adjustment knob do?
|
controls the amount of light passing through the specimen.
-------------------- course adjustment: roughly focuses on the image ------------------- fine adjustment: sharply focuses on the image --- page 68 |
|
|
What is audioradiography? what is it used to study?
|
this technique uses radioactive molecules to trace and identify cell structures and biochemical activity. It is used to study protein synthesis
--- page 69 |
|
|
What and when is centrifugation?
|
It can be used to seperate cells or mixtures of cells without destroying them in the process?
--- page 69 |
|
|
What microscopes can be used on the living?
|
A phase contrast microscope
--- page 68 |
|
|
What organisms can be viewed using an electron microscope?
|
Can't use living specimens because they will be killed.
--- page 69 |
|
|
Are viruses considered cells? Why or why not?
|
They are not capable of living independently.
--- page 69 |
|
|
What characterizes a prokaryote?
|
Prokaryotes are unicellular organisms with a simple cell structure. They have an outer cell membrane but do not have membrane bound organelles and don't have a true nucleus.
--- page 70 |
|
|
What are the basic differences between plant and animal cells?
|
plant cells have a cell wall and chloroplasts,animal cells do not. Centriooles are found in animal cells but not plant cells.
---page 70 |
|
|
What is cytosol?
|
Cytosol is the fluid component of the cytoplasm and consists of an aqueous solution containing free proteins, nutrients, and other solutes.
---page 71 |
|
|
What is cytoskeleton?
|
It gives the cell its shape and anchors the organelles. It functions in cell maintenance and aids in intracellular transport.
|
|
|
Explain what a cell membrane's function is.
|
A cell membrane encloses the cell and exhibits selective permeability. It regulates the passage of materials into and out of the cell. According to the generally acceptped
|
