B3 - Molecules of Life

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What is the role of the Nucleus?
Holds chromosomes
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What is the role of the Cell Membrane?
Contains movement of substances in and out of the cell
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What is the role of the Ribosomes?
To perform protein synthesis
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What is the role of the Cytoplasm?
To perform chemical reactions
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What is the role of the Mitochondria?
The site of respiration
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True or false: Ribosomes are smaller than mitochondria.
TRUE
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What does the amount of mitochondria in a cell depend on?
The activity of the cell
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What do chromosomes in the nucleus carry?
DNA
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What is DNA made from?
A double helix consisting of bases
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What does DNA control the production of?
Proteins
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What are proteins needed for?
Growth and repair
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Whom was the structure of DNA first worked out by?
Watson and Crick
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Why is there such a delay between discovery and winning a prize?
Other scientists need to check the discovery to make sure that it's correct
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Why do the liver and muscles have large numbers of mitochondria?
They are active organs that produce energy
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What are genes?
Long, coiled molecules of DNA divided up into sections
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What do genes contain different sequences of?
DNA that codes for different proteins
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What are the complementary base pairs?
A and T or G and C
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What does the base sequence determine?
Which amino acids are created and joined to make specific proteins
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What is mRNA?
Copies the DNA code exactly to make proteins, T is changed to U
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Other cards in this set

Card 2

Front

What is the role of the Cell Membrane?

Back

Contains movement of substances in and out of the cell

Card 3

Front

What is the role of the Ribosomes?

Back

Preview of the front of card 3

Card 4

Front

What is the role of the Cytoplasm?

Back

Preview of the front of card 4

Card 5

Front

What is the role of the Mitochondria?

Back

Preview of the front of card 5
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