Cell Biology (biology) Flashcards
(23 cards)
What’s the function of the nucleus?
Contains the cells DNA. Controls activity in the cell.
What’s the function of the Cell membrane?
Controls the passage of substances moving in and out the cell.
What’s the function of the Cytoplasms ?
It’s where the chemical reactions take place.
What’s the function of the Cell wall?
Helps maintain the cell structure and protects the cell.
What’s the function of the Ribosomes?
The Ribosomes produce protein.
What’s the function of the Chloroplasts?
Help with photosynthesis
What’s the function of the Vacuole?
Stores water and helps support the structure of the cell.
What’s the function of the Mitochondria?
Respiration occurs in the mitochondria
Give example of a Eukaryotic cell:
Eukaryotic cells are all plant and animals cells. Key features: -membrane bound - large and complex - have DNA in the nucleus
Bacteria are an example of……….. cells. They are small and simple and are found almost everywhere.
Prokaryotic
What is the equation to work out magnification?
Size of image
Magnification | Real size
Basically: magnification = image size / real size
What are genes?
Sections of DNA.
The codes for characteristics
Humans have ____ pairs of chromosomes.
23
Mitosis is….
A section of the cell cycle where one set of chromosomes are pulled to the end of the cell. This forms two (identical) nuclei.
Self-renewal is when…
A cell copies itself
Differentiation is when
A cell makes other cells to do a particular job.
These are known as specialised cells.
Stem cells are
Cells that have not yet differentiated
Potency is…
The measure of how many types of specialised cell a stem cell can make
Pluripotent means…
Can make all kinds of specialised cells
Multipotent can….
Make some but not all specialised cells
Isotonic is…
When the two environments have the same concentration
Hypertonic
Concentration is greater outside the cell than inside
Hypertonic
Concentration is less outside than in the cell
