DNA: Molecule of Life Crossword Puzzle

QUESTIONS LIST:

• thymine: according to base pairing rule adenine pairs with
• cytosine: according to base pairing rule guanine pairs with
• adenine: according to base pairing rule thymine pairs with
• guanine: according to base pairing rule cytosine pairs with
• purines: are large molecules with a double-ring structure
• pyrimidines: are smaller molecules with a single- ring structure
• chargaff: erwin _ discovered an important rule about dna known as chargaff's rule
• double helix: dna has a _ structure
• twisted ladder: a double helix looks like a _
• sugar phosphate: the sides of the dna ladder is made of alternating sugar and phosphate molecules called the _ backbone
• four: there are _ nitrogen bases
• two: adenine and thymine form _ hydrogen bonds
• three: cytosine and guanine form _ hydrogen bonds
• replication: dna must copy itself in a process called dna _
• helicase: an enzyme called dna _ breaks hydrogen bonds and unzips the dna molecule
• polymerase: an enzyme called dna _ reads the original dna strand and adds complementary nucleotides to form a new strand
• semiconservative: replication process in which each new dna molecule contains one original strand and one newly formed strand
• nucleus: dna is located inside the _
• dna: all living organisms contain _
• genetic: dna holds the _ code that determines many physical characteristics
• nucleotides: dna is classified as a nucleic acid, which means its made up of smaller building blocks called _
• xray: james watson and francis crick determined the shape of dna using _ diffraction