DNA Structure
DNA Replication
Cell Cycle
Mitosis
MISC.
100
What does the complementary base pairing rule state in DNA?
A always binds to T
C always binds to G
100
What is the 1st step of DNA replication?
Double-stranded DNA unwinds
100
What happens at the end of mitosis?
Cytokinesis
100
What is the purpose of Mitosis?
Mitosis produces 2 IDENTICAL daughter cells
100
What is cancer?
Uncontrolled cell division
200
What is the complimentary DNA strand for:
TACGGTACG
ATGCCATGC
200
What is the 2nd step of DNA replication?
The weak hydrogen bonds by helicase are broken, and the 2 strands separate.
200
In what part of the cell does DNA replication occur?
the nucleus
200
What should happen if a cell fails a checkpoint?
Cell should undergo APOPTOSIS (cell death). Some cells bypass the check and may become cancerous.
200
If a piece of DNA has 56 Thymines, how many Adenine would it have?
56 Adenines
300
What are each of these parts?
A: Deoxyribose Sugar
B: Phosphate
C: nitrogenous base
300
What is the 3rd step of DNA Replication?
New nitrogenous base pairs form. An enzyme called DNA polymerase helps this happen faster.
The template strand = the original nucleotides
The complementary strand = the new nucleotides
300
What part of the cell cycle do cells spend most of their time?
Interphase!! (90%)
300
What happens after the chromosomes line up in the middle?
Spindle fibers separate chromosomes and pull them to either side of the cell
300
What part of the cell cycle would cancer spend most of its time? (Interphase or Mitosis)
Mitosis -- it's constantly dividing!
400
Describe the structure of a DNA molecule.
Double stranded and twisted. Double helix.
400
What does semi-conservative mean?
DNA strands have one old strand and one new strand
400
During which phase of the cell cycle does DNA replication occur?
DNA in the cell is replicated during Interphase (S phase)
400
What happens after the chromosomes separate?
The cell pinches in the middle (cytokinesis) and 2 identical cells are produced
400
What type of bond holds the nitrogen bases together in DNA?
Hydrogen bonds
500
True/False?
DNA strands are parallel
FALSE - DNA strands are anti-parallel
500
What is the purpose of DNA Replication?
Duplicate DNA so each daughter cell after mitosis has an identical copy of the DNA
500
If a fly has 10 chromosomes in each of its body cells, how many chromosomes will be in each daughter cell after mitosis?
10
500
What structure(s) allow for chromosomes to separate and move during mitosis?
Spindle fibers
500
true or false Cancer cells exit the cell cycle and enter the G0 phase.
False Cancer cells do not exit the cell cycle and enter the G0 phase.