Biology Revision cards

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What is the structure of Gram-negative bacteria?
It consists of two membranes, the outer membrane followed by a thin cell wall and followed by a plasma membrane .
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What is the structure of Gram-positive bacteria?
It consists of a thick cell wall then followed by a plasma membrane.
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What are Prokaryotic cells?
They are made of single cells, an example is bacteria. These cells do not contain membrane bound organelles such as a nucleus and mitochondria.
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What are Eukaryotic cells?
They contain membrane bound organelles such as a nucleus and mitochondria. Examples are cells of animals, plants and fungi
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What is a Palisade cell?
These are Cylindrical shaped so they are tightly packed in the leaf
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How are Root hair cells adapted to their function?
They contain many mitochondria to help supply energy for active transport of minerals from the soil into the cell. They have a large vacuole which provides a larger surface area, to allow more absorption to take place
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Give examples of specialised cells
Gametes (sperm and egg), red blood cells and white blood cells.
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How are Sperm cells specialised to their functions?
The contain a lot of mitochondria to provide the sperm with energy so that it can swim to the egg
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How is an Egg cell specialised to their functions?
The egg has a jelly layer (zona pellucida) which only allows one sperm to fertilise the egg
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Other cards in this set

Card 2

Front

What is the structure of Gram-positive bacteria?

Back

It consists of a thick cell wall then followed by a plasma membrane.

Card 3

Front

What are Prokaryotic cells?

Back

Preview of the front of card 3

Card 4

Front

What are Eukaryotic cells?

Back

Preview of the front of card 4

Card 5

Front

What is a Palisade cell?

Back

Preview of the front of card 5
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