Term
Name the three differences
between DNA and RNA. |
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Definition
- DNA has a double helix, RNA has a single strand.
- DNA has a deoxyribose sugar, RNA has a ribose sugar.
- DNA contains T, RNA contains U.
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Term
What is RNA known as in the cnetral dogma? |
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Definition
The intermediatary molecules. |
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Term
What does rRNA do along
with proteins?
And what is this the site of? |
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Definition
They make ribosomes, the site of polypeptide synthesis. |
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Term
- What are ribosomes composed of?
- What three sites does a ribosome contain?
- What are these sites important to?
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Definition
- 2 sub units - a large and a small.
- "E", "P" and "A"
- protein synthesis
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Term
What does tRNA transfer
to the ribosome and
what does it ensure
once there? |
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Definition
Transfers amino acids to the ribosome and ensures it is in it's correct position in the elongated polypeptide chain. |
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Term
Describe the structure of tRNA.
(2 things) |
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Definition
- It has three hoops. Hoops 1+2 bind to the ribsome, hoop 3 carries the anticodon.
- The free 3OH group carries an amino acid.
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Term
- What does mRNA do? (and..)
- What does transcribed mRNA do?
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Definition
- Transfers info from DNA to ribosome and uses this to direct protein synthesis.
- Determines the sequence of the amino acids incorporated in the polypeptide chain.
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