DNA Structure
What are the building blocks of DNA?
Nucleotides
What phase involves cell growth before DNA replication?
G1
Which checkpoint checks size, nutrients and DNA damage before S phase?
G1
What does DNA replication produce?
Two DNA molecules
Which base pairs with adenine?
Thymine
What are the three parts of a nucleotide?
Sugar, phosphate, nitrogenous base
In which phase is DNA copied?
S phase
When a cell loses their ability to regulate the cell cycle, they can divide at an accelerate rate and form a mass, it is called?
tumor
What does semiconservative mean?
Each DNA molecule has one old and one new strand
Which phase checks if the DNA is ALL there?
What are the four DNA bases?
Adenine, thymine, guanine, cytosine
What phase prepares the cell for division after replication?
G2
How do cells most likely become cancerous?
A. ATP is no longer needed for cell division
B. Unregulated cell division occurs because of mutations in the DNA
C. DNA replication is omitted because of changes in the genetic code
D. Damage to DNA molecules resulted in improved responses to cell cycle checkpoint.
B
In which direction is new DNA synthesized?
5 to 3
What is a carcinogen?
An agent that can cause cancer
What is the shape of DNA called?
Helix
What divides the nucleus?
Mitosis
Mitosis
Scientist have reported 95% of the factors that lead to some types of cancers are caused random DNA copying errors. What phase would the DNA copying errors most likely occur?
S Phase
What does DNA replication produce?
Two DNA molecules
Which phase does cleavage take place?
Telophase
Complete the complementary DNA strand: A T G C C A
TACGGT
What divides the cytoplasm?
Cytokinesis
Give two examples of carcinogenic exposures.
UV radiation
tobacco
hpv
varies...
What is it called when the DNA takes its original DNA and needs to make two copies? IT _____________?
unzips
What phase in mitosis is when the nucleus disappears?
prophase