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14 Cards in this Set
- Front
- Back
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What is a gene? |
A gene is a length of DNA which codes for one or more polypeptide. |
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What type of proteins do genes code for? |
- Enzymes - Channel proteins - Structural proteins - Antibodies |
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What are the four possible nucleotide bases in a DNA? RNA? |
Adenine Thymine Guanine Cytosine (uracil in RNA) |
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How many different combination of nucleotide bases can make up a triplet code? |
4^3 = 64 |
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How many amino acids exist? |
20 |
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What is a degenerate code? |
This is when more than one triplet code codes for one amino acid. |
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What are the two main steps of protein synthesis? |
Transcription and translation. |
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Where does transcription occur? |
This process occurs inside the nucleus. |
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Where does translation occur? |
Translation occurs within the cell. |
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What does mRNA stand for? |
Messenger ribosomal nucleic acid. |
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What is a codon? |
Three adjacent bases. A triplet code. |
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What does tRNA stand for? |
Transfer ribosomal nucleic acid. |
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What is an anti-codon? |
An amino acid binding site with a sequence of three nucleotides complementary to the amino acid. |
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What is the role of tRNA? |
tRNA carries the amino acids to the ribosome during the process of translation. |
