Question | Answer |
What are the 4 nitrogen containing bases of DNA | Thymine, Cytosine, Adenine, Guanine |
What are the 4 nitrogen containing bases of RNA | Adenine, Cytosine, Guanine, Uracil |
Pentose sugar in DNA | deoxyribose |
Pentose sugar in RNA | Ribose |
What bonds hold 2 sides of DNA together | Hydrogen bonds |
2 purine bases | Adenine and Guanine |
2 pyrimidine bases | Cytosine and Thymine |
Difference between structure purine and pyrimidine | purines have two rings
pyrimidines have one ring |
Complementary base pairing | nucleotide bases linked by hydrogen bonds on opposite strands of DNA
Guanine CB is Cytosine and Adenine CB is Thymine. |
DNA form of strand | Double |
RNA form of strand | Single |
Replication occurs | nucleus of eukoryotes and cytoplasm of prokoryote |
Transcription occurs | nucleus unless mRNA is produced in cytoplasm |
Translation occurs | mRNA is produced in cytoplasm, ribosome. |
Messenger RNA function
mRNA | passes information from DNA to the ribosome, sequence of products of gene expression |
Transfer RNA function
tRNA | physical link between mRNA and amino acid sequence of protein |
Ribosomal RNA function
rRNA | The predominant material within the ribosome |
condon | 3 base sequence (3 nitrogen bases in a row) on RNA |
anticondon | 3 base sequence on tRNA |
how many amino acids are in most organisms | 20 |