Science OCR Gateway B flashcards - B3, C3, P3 - Molecules of life

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What is mitochondria?
Structures in the cytoplasm of all cells where respiration takes place.
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What is respiration?
The chemical reaction that releases energy from glucose.
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Where does respiration occur?
In mitochondria.
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What tissues and organs need a lot of energy, thus needing more mitochondria?
Liver cells, muscles cells
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What is the cytoplasm?
Living substance inside the cell.
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What are ribosomes the site of?
Protein synthesis.
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What are chromosomes?
Long, coiled molecules of DNA, divided up into regions called genes.
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What does the genetic code control?
Cell activity, thus can control some characteristics of the organism.
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What does DNA control?
Production of different proteins, needed for cell growth and repair
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Which two scientists worked out the structure of DNA?
James Watson and Francis Crick.
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What are the four types of complementary base pairings?
A, T, C and G.
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What do the two strands of DNA coil together to form?
A double helix.
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What does each gene in a molecule of DNA contain? (Two points)
1. A different sequence of bases. 2. Codes for particular proteins.
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As genes cannot leave the nucleus, so what happens in order for protein to be made?
There is a copy made which is able to leave the nucleus. This then leaves the nucleus and goes to the cytoplasm in order for protein to be formed.
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How is protein coded?
By the structure of three bases.
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What is the code GGT and TCA found in?
GGT is found in glycine and TCA is found in serine.
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What is mRNA from DNA called?
Transcription.
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What is proteins from mRNA called?
Translation.
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Other cards in this set

Card 2

Front

What is respiration?

Back

The chemical reaction that releases energy from glucose.

Card 3

Front

Where does respiration occur?

Back

Preview of the front of card 3

Card 4

Front

What tissues and organs need a lot of energy, thus needing more mitochondria?

Back

Preview of the front of card 4

Card 5

Front

What is the cytoplasm?

Back

Preview of the front of card 5
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