1) to regulate movement of substances into and out of the cell 2)to respond to chemicals like hormones.
1 of 21
Describe the function of the nucleus.
Controls the cells activities by controlling the transcription of DNA.
2 of 21
Give 1 function of a lysosome.
Digest invading cells.
3 of 21
What is the function of the smooth endoplasmic reticulum?
It synthesises and processes lipids.
4 of 21
Explain the difference between a tissue and an organ.
Tissue= similar cells grouped together Organ= different tissues are grouped together to perform a particular function.
5 of 21
What is an organ system?
Where different organs work together to carry out a particular function.
6 of 21
What is a capsid?
A protein coat that surrounds the core of genetic material in a virus.
7 of 21
Formula for calculating magnification.
Magnification= size of image/ actual size
8 of 21
What is the difference between magnification and resolution?
Magnification=how much bigger the image is than the specimen Resolution=how well a microscope can distinguish between two points that are close together.
9 of 21
How do transmission electron microscopes (TEMs) work?
Use electromagnets to focus a beam of electrons, which is then transmitted through the specimen.
10 of 21
How do scanning electron microscopes (SEMs) work?
Scan a beam of electrons across the specimen.
11 of 21
Give 1 advantage and 1 disadvantage of TEMs.
Advantage=produces high resolution images Disadvantage= can only be used on non-living specimens.
12 of 21
Give 1 advantage of SEMs over TEMs.
Can be used on thick specimens.
13 of 21
What is a temporary mount microscope slide?
A prepared microscope slide with the specimen covered in a drop of liquid (usually iodine).
14 of 21
What is an artefact?
Something you can see down the microscope that is not part of the cell or specimen you are looking at.
15 of 21
What is the cell cycle?
The process that all body cells from multicellular organisms use to grow and divide.
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During what stage of the cell cycle does DNA unravel?
Interphase.
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What happens during prophase?
Chromosomes condense and become shorter and fatter.
18 of 21
What happens during telophase?
Chromatids reach opposite poles of the spindle. They uncoil and become long and thin.
19 of 21
What is cytokenesis?
Division of the cell cytoplasm.
20 of 21
What is cancer?
A tumour that invades surrounding tissue.
21 of 21
Other cards in this set
Card 2
Front
Describe the function of the nucleus.
Back
Controls the cells activities by controlling the transcription of DNA.
Card 3
Front
Give 1 function of a lysosome.
Back
Card 4
Front
What is the function of the smooth endoplasmic reticulum?
Back
Card 5
Front
Explain the difference between a tissue and an organ.
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