13.3/13.2 quiz

Question 1

steps of DNA replication

Answer 1

1. (s phase) the two strands of the double helix are separated by enzymes
2. strands synthesized to be complimentary to each original strand
3. (DNA polymers) proof reads strands
4. strands now have complete set of genes separate during mitosis and anaphase

Question 2

what’s needed for DNA replication

Answer 2

• enzymes (break hydro bonds)
• free nucleotides
• polymers to join nucleotides onto temple of DNA strand

Question 3

prokaryotic cells

Answer 3

circle DNA molecule

replication starts in one point

Question 4

eukaryotic cells

Answer 4

DNA (chromosomes) in nucleus
Replication starts in many points
telomeres on tip of chromo
DNA and histones from nucleosomes

Question 5

DNA replication called

Answer 5

semiconservative

Question 6

nitrogenous base

Answer 6

adenine, guanine, cytosine, or thymine (A,T,C,G)

Question 7

three components of the nucleotide

Answer 7

nitrogenous base = 5-carbon sugar = phosphate group

Question 8

A strand of DNA is…

Answer 8

polymer of nucleotides

Question 9

joined by covalent bonds between the

Answer 9

deoxyribose of one monomer and phosphate group of another

Question 10

Rosalind Franklin’s photographs of the X-ray diffraction pattern of DNA

Answer 10

• The DNA strands are twisted around each other.
• There are two strands in the DNA molecule.
• The nitrogenous bases are near the center of the DNA
  molecule.