Cell Cycle
What does your body use to make new cells?
Existing Cells
What does DNA stand for?
Deoxyribose Nucleic Acid
What are the 5 phases of mitosis?
Prophase, Metaphase, Anaphase, Telaphase, Cytokinesis
What does it mean to be semi conservative?
Each DNA molecule contains one original strand & one new strand
Why does DNA need to change from chromatin to chromosome?
For more efficient division.
What phase do cells spend the most time in?
Interphase
mRNA, tRNA, rRNA
How chromosomes do humans have?
46 chromosomes
In RNA instead of thymine, adenine pairs with...
Uracil
In what phase of mitosis do the chromosomes uncoil back into chromatin and two nuclei are formed?
Telophase
What are the 3 phases of the cell cycle?
-G1 (First growth)
-S phase (Synthesis)
-G2 (Second growth)
Helicase
Which phase do phase to chromosomes cross over?
Metaphase
What cells are produced after cell division? And are they identical or diverse?
Daughter cells are produced. Yes they are identical.
What enzyme fuses okazaki fragments and the lagging strand back together?
Ligase!
When the cells grow what happens to the DNA?
The DNA is loosely wound and the cell carries out its normal function.
What 3 things make up a nucleotide?
What is another name for body cells?
Somatic cells
What are the fragments called that are produced from the lagging strand?
Okazaki Fragments
What is the problem with the gene p53?
it is related to more than 50% of all cancers.
Do injuries affect the rate of cell division? Is it faster or slower?
Yes. The rate becomes faster.
Who developed the first DNA model?
James Watson and Francis Crick
What is formed during Prophase?
Chromatids
Which direction does replication occur?
ONLY occurs in the 5'-3' direction!
# of A's= # of T's
# of C's= # of G's
What is Chargaffs rule?