Nucleic acids Flashcards
What are Purines
They are larger molecules like Adenine and Guanine
What are Pyrimidines
They are smaller molecules like Thymine and cytosine
How many hydrogen bonds to C and G have
3 bonds
How many hydrogen bond do A and T have
2 bonds
The concentration of adenine within a double helix is equal to.
The concentration of thymine
The concentration of cytosine within a double helix is equal to
The concentration of Guanine
The double helix of DNA has these features:
Watson-Crick base-pairing, A will only base-pair with T, and C with G. G-C base-pairs are more stable than A-T base-pairs.
Two polynucleotide strands wound around each other. The backbone of each consists of alternating deoxyribose and phosphate groups
What is mRNA
It is messenger RNA, carries a gene’s message out of the nucleus.
What is tRNA
Transfers genetic information from mRNA to an amino acid sequence as to build a protein, they contain an anticodon on the bottom of their clover leaf esq structure which bind to the mRNA in the ribosome to create a polypeptide chain.
What is rRNA
It is ribosomal RNA. Part of the ribosome which is involved in translation.
What are triplets? DNA
3 bases in a codon.
What is Non-overlapping? DNA
each base is included only once.
What is meant by universal in DNA
all organisms have the same DNA
What is a degenerate for DNA?
Multiple codons code for the same amino acids.
What is a gene?
It is a section of DNA that codes for a polypeptide
