DNA/RNA/Protein Synthesis - tinker
Chargaff's rule
(a)=(t) and (g)=(c)
the monomers of dna are made of...
-5-carbon sugar (deoxyribose) -phosphate group -nitrogenous base
What are three things genes can do?
-carry info from one generation to the next -determine the heritable characteristics -easily copied
Watson and Crick discovered that ____ bonds hold the nitrogenous bases together. this phenomenon is called ______
-hydrogen -base pairing
had it not been for _____'s X-ray images of DNA, Watson and Crick may not have determined the structure of dna
Rosalind Franklin
which 2 nitrogenous bases are purines?
adenine and guanine
which 2 nitrogenous bases are pyrimidines?
cytosine and thymine
how does base pairing explain Chargaff's rule?
for every adenine in a double-stranded dna molecule there had to be exactly one thymine molecule; for each cytosine molecule there is one guanine molecule
monomers of DNA are...
nucleotides
what is the difference between purines and pyrimidines?
purines have 2 rings in their structure while pyrimidines have 1 ring
the backbone of dna consists of...
sugar(deoxyribose) and phosphate
how are the 4 nucleotides similar to the letters of an alphabet?
they can be arranged in many different ways