DNA structure & Gene expression Flashcards
DNA
the storage molecule of genetic information
Sugars and phosphates are connected by?
Phosphodiester bonds
What connect the bases of DNA?
hydrogen bonds
How many strands between A and T
2
How many strands between C and G
3
2 stages when the gene codes for the protein that a cell needs.
Transcription, translation
What happens during transcription?
A piece of DNA that codes for a specific gene is copied into messenger RNA in the nucleus of a cell
Amino acid is connected to?
the previous one by a peptide bond, creating a polypeptide.
What is an anticodon
A trinucleotide sequence is located at the end of a transfer RNA (tRNA) molecule.
What is an amino acid?
building blocks of proteins
What are ribosomes?
cell cytoplasm, attached to RE reticulum. (the dots)
How many Codon combinations?
64 codon combinations that code for 20 amino acids and 3 stop codons.
C
G
G
C
T
A