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17 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are the two types of organisms you need to know? |
Eukaryotes and Prokaryotes |
One has a nucleus, the other does not. |
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Name three subcellular structures in plant cells which are not in animal cells. |
-Cell Wall -Permanent Vacuole -Chloroplasts |
1) supports the cell and makes it stronger 2) contains cell sap 3) where photosynthesis takes place |
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What type of organism are Bacteria- prokaryotes or eukaryotes? |
Prokaryotes |
The DNA in a bacterial cell floats about in the cytoplasm- no nucleus |
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How do you calculate magnification? |
Magnification = image size real size |
If image size = magnification x real size |
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Which has a higher magnification - electron microscopes or light microscopes? |
Electron microscopes |
Which sounds cooler and more scientific? |
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What does 'resolution' mean in terms of microscopy? |
Resolution is the ability to distinguish between two points. So basically how clear the microscope's image is. |
If you increase the resolution on an image does it become sharper or more blurry? |
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What is 230000 in standard form? |
2.3 x 10 (to the power of) 5 |
wooo maths- Start with 2.3 and count how many times you'd have to multiply that by 10 before getting to 230000. Or just count the amount of numbers after the 2. |
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Why would you add iodine to a sample on a microscope slide? |
to highlight the sample by adding colour - or just to make it easier to see. |
Iodine stains the sample |
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What is differentiation? |
The process of a cell changing to become specialized. |
Think about the word - what does differentiate mean? To become different. So what is happening to the cell? |
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How are sperm cells specialized for reproduction- give 2 ways: |
- Long tail and streamlined head so it can swim faster - lots of mitochondria as they provide the energy - enzymes in it's head to digest the egg cell membrane |
this is roughly what it looks like |
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Why do xylem and phloem cells have little or no subcellular structures? |
So the stuff they are transporting can flow easily through. |
would it be more difficult to transport glucose and water through a cell with loads of stuff in the way? |
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Why do muscle cells contain a ton of mitochondria? |
Because mitochondria provide energy, which the muscle cells need in order to contract. |
muscle cells do a lot of hard work- so what could they need in order to be able to do this? |
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Where are chromosomes found within a cell? |
In the nucleus. |
most cells in your body have one of these |
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How many pairs of Chromosomes are in a human cell? |
23 pairs. 46 individual ones. |
they get two copies of each Chromosome, one from the mother, one from the father. 46 in total. |
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What is the first stage of the cell cycle? |
The cell has to grow and increase the amount of subcellular structures, like mitochondria and ribosomes. |
increasing something... |
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What do you call the new cells that the original cell creates? |
The daughter cells. |
Not the mother cells... or the son cells... but the..... |
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What are undifferentiated cells called? |
Stem cells. |
Cells which are unspecialised. |
