B1- Cell Biology [1] Flashcards
Name either type of cell
Eukaryotic and prokaryotic
What is a prokaryotic cell
Single celled organism
Name things plant cells have that animal cells don’t
Chloroplast, vacuole, cell wall
How is bacteria DNA stored in a cell
As a single strand
What are the other small rings of DNA in a bacteria cell called
Plasmid
Name both types of microscopes
Light microscope and electron microscope
What microscope has a higher magnification power
Electron microscope
CAN YOU DO THIS?
YES😻
How do you prepare an onion slide for a microscope
- Add drop of water onto slide
- Peel of epidermal tissue off an onion layer and add to slide
- Add a drop of iodine solution (allows you to see it clearer)
4.clover slip and avoid trapping air bubbles
How to prepare a light microscope
- Clip slide on
- Set to lowest lense
3.look down and use knob into adjust the focus
4.Eventually increase magnification and adjust focus
What is a differentiated cell
A cell that changes to fit a specific job
When does an animal cell lose its ability to differentiate
Early fetal state
Name another type of differentiated cell
A stem cell
Name examples of differentiated cells
Sperm cell, xylem, phloem, root hair cell, nerve cells and muscle cells
How many pairs of chromosomes does a nucleus contain
23
What can embryonic cells turn into
ANY CELLLLL
Where a stem cells found in adults
Bone marrow
What are the medical risk of lab stem cells
The lab could be contaminated by a virus so could make people sicker
Define diffusion
The movement of particles from a high to low concentration
Name molecules that can enter and diffuse in a cell
Oxygen, glucose,amino acids and water
The larger the surface area the..
Faster the diffusion rate
Define osmosis
The movement of particles from a high to low concentration through a PARTIALLY PERMEABLE membrane
What vegetable do you use in an osmosis experiment
Potato
What is the IV in the super starch solution
Different sugar solutions
Define active transport
The movement of particles from a low to high concentration using energy
What movement of particles requires energy
Active transport
