Add Science: Biology - B2a

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What is the function of ribosomes?
Where proteins needed for the cell are synthesised
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Which types of cells are ribosomes found in?
Animal and Plant
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What are bacteria (in terms of cells)?
Unicellular organisms that are microorganisms
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What is the function of the vacuole?
Contains cell sap that helps to keep cell rigid to support plant
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What happens in mitochondria?
Energy is released during respiration
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What doesn't a bacteria cell have and so what does this mean?
Nucleus so the genetic material is in the cytoplasm
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What is the function of plasmids in a bacteria cell?
Small circles of DNA that also contain genes to make protein
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If a cell has many mitochondria, what does this mean?
It must need a lot of energy
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Many ribosomes?
It is making a lot of protein
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Why are cells specialised?
So that they can carry out a particular function
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What is the function of a muscle cell?
Contracts to allow movement of body parts
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How is a muscle cell adapted?
It contains long protein filaments that can lie past each other to shorten the cell
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What is the function of a guard cell?
To open and close stomata
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What does epithelial mean?
A cell that covers or lines something
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What is a tissue?
Lots of specialise cells working together
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What is diffusion?
Spreading out of particles of a gas or any substance in a solution
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What does the net movement depend on?
The concentration of particles on each side of the cell membrane
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What happens in diffusion?
Particles move randomly from an area of high concentration to an area of lower concentration
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What is the concentration gradient?
The difference between the two areas.
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The larger the concentration gradient...
the faster the rate of diffusion
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Explain cells
These differentiate during the development of organisms so that they can perform certain functions
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Tissue
Group of cells working together to perform a certain function
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What is the function of epithelial tissue?
Make up linings and cover some parts of the body
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Function of glandular tissue?
Produce substances such as enzymes or hormones and then to release them
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Function of muscular tissue?
Contact to bring about movement
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Other cards in this set

Card 2

Front

Which types of cells are ribosomes found in?

Back

Animal and Plant

Card 3

Front

What are bacteria (in terms of cells)?

Back

Preview of the front of card 3

Card 4

Front

What is the function of the vacuole?

Back

Preview of the front of card 4

Card 5

Front

What happens in mitochondria?

Back

Preview of the front of card 5
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