Protein Synthesis ( Transcription ) Flashcards
Transcription Definition
Process of copying DNA code to create mRNA.
Purpose of transcription
Prepare instructions for protein synthesis.
DNA Code components
A, T, G, C (adenine, thymine, guanine, cytosine).
Order of nucleotides
Determines genetic information.
Genes Definition
DNA segments that code for specific traits or characteristics.
Example: Each gene provides instructions for making a particular protein.
Template Strand
The side of DNA used for copying during transcription.
Enzymes read the template to form complementary mRNA.
Codon
Set of three nucleotides in mRNA.
Represents an amino acid or a start/stop signal.
mRNA (Messenger RNA)
Result of transcription.
Carries genetic instructions from DNA to ribosome.
Base Pairing (RNA)
• A-U (adenine-uracil) replaces A-T (adenine-thymine) in DNA.
• G-C (guanine-cytosine) pairing remains the same.
Nuclear Pores
Openings in the nuclear membrane
mRNA exits nucleus through nuclear pores.
Ribosome
Protein synthesis site.
Reads mRNA codons and assembles amino acids.