DNA/RNA/Protein Synthesis - tinker

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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


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