DNA STRUCTURE AND REPLICATION QUIZ

60%

Guanine residue can not be calculated

30%

15%

one new DNA molecules 1 old molecule

one new molecule of RNA

two DNA molecules such that each one contains a strand of the original

two completely new DNA molecules

Mold

Bacteria

Glass crystals

Yeast

five bases known as adenine, guanine, thymine, tryptophan and cytosine

three bases known as adenine, guanine and cytosine

four bases known as adenine, guanine, thymine and cytosine

only two bases known as adenine and cytosine

twisting number

none of these

helix frequency

linking number

Digests mRNA when it is no longer needed

Joins nicks in DNA strands

Synthesizes the lagging strand

Makes copies of mRNA from DNA

Leading strands

Lagging strand

Okazaki fragments

Primers

right-handed double helix of parallel chains (∼10 bp/turn)

left-handed zig-zag helix of antiparallel chains (10 bp/turn)

left-handed double helix of antiparallel chains (10 bp/turn)

right-handed double helix of antiparallel chains (∼10 bp/turn)

A-DNA

B-DNA

X-DNA

Z-DNA

Single stranded protein, DNAa

DNAb, gyrase

DNAb, DNA polymerase

DNAa, gyrase