OCR B3a - Molecules of life.

What does a typical cell consist of?
Cell membrane, Cytoplasm, Mitochindra, Nucleus and Ribosome.
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What occurs in cytoplasm?
Chemical Reaction.
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What does the cell memorane do?
Controls movement.
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What takes place in mitochindra?
Respiration
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Where are mitchindra found the most? Why?
Liver and muscle cells. High energy requirement.
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What does nucleus contain?
Genetic information - code.
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The genetic information is carried by?
Genes on chromosomes
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What does genetic code control?
Cell activity and Characteristics.
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In which form are the genetic codes?
Chemical code made up of 4 bases.
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What do this 4 basis form?
Cross links - holds two strands.
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Which two scientis came up with DNA structure?
James Watson & Francis Crick
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Explain the structure of DNA?
Two strands coiled around each other in double helix.
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What does each gene in DNA contains?
Different SEQUENCE of bases
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Where are proteins made?
Cytoplasm
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How does DNA controls cell function?
Through Production of protein.
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The four bases are?
A-T AND C-G
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What is A-T AND C-G called?
Complimentary base pairing.
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What are proteins made up of?
Chains of amino acids.
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From where do cells use amino acids?
Foods
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What does each protein have?
Different shape and function.
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Proteins are synthesised by structures called?
Ribosomes
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What does sequence of genes represents?
The order in which cell should assemble amino acids to make protein.
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How many bases represent one amino acids in a protein chain?
Group of 3- triplets.
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How can protein produce a particular type of gene?
Cells will 'switched on' genes which are required, rest are 'switched off'.
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Step 1 of protein synthesis?
mRNA constructed from DNA template in nucleus.
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Step 2 of protein synthesis?
mRNA carries code from DNA into cytoplasm and now attached to ribosome.
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Step 3 of protein synthesis?
Ribosome translate the code & constructs a sequence of amino acids.
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Step 4?
Amino acids linked together like long chain and released to carry out its function.
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Other cards in this set

Card 2

Front

What occurs in cytoplasm?

Back

Chemical Reaction.

Card 3

Front

What does the cell memorane do?

Back

Preview of the front of card 3

Card 4

Front

What takes place in mitochindra?

Back

Preview of the front of card 4

Card 5

Front

Where are mitchindra found the most? Why?

Back

Preview of the front of card 5
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Comments

Ekekdmdmeme

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I hope these flashcards are helpful. 

Fnt1klo3

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Indeed helpful, Brilliant.

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