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