Cell Cycle and DNA Review
Flashcard
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Biology
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9th Grade
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Practice Problem
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Hard
Sierra Hernandez
FREE Resource
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50 questions
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1.
FLASHCARD QUESTION
Front
What is the correct order of the cell cycle phases?
Back
G1, S, G2, M
Answer explanation
The correct order of the cell cycle phases is G1 (cell growth), S (DNA synthesis), G2 (preparation for mitosis), and M (mitosis). Therefore, the right choice is G1, S, G2, M.
2.
FLASHCARD QUESTION
Front
What is DNA's structure shape?
Back
Double Helix
Answer explanation
DNA's structure is a Double Helix, consisting of two intertwined strands that coil around each other. This shape is crucial for its function in storing and transmitting genetic information.
3.
FLASHCARD QUESTION
Front
Which base pairs with Adenine (A) in DNA?
Back
Thymine (T)
Answer explanation
In DNA, Adenine (A) pairs with Thymine (T) through two hydrogen bonds, ensuring proper base pairing. Guanine (G) pairs with Cytosine (C), while Uracil (U) is found in RNA, not DNA.
4.
FLASHCARD QUESTION
Front
What is the main function of DNA polymerase?
Back
Adding nucleotides
Answer explanation
The main function of DNA polymerase is adding nucleotides to the growing DNA strand during replication, ensuring accurate copying of genetic information. This is crucial for cell division and maintaining genetic integrity.
5.
FLASHCARD QUESTION
Front
What enzyme unzips DNA?
Back
Helicase
Answer explanation
Helicase is the enzyme that unwinds and separates the two strands of DNA during replication, effectively 'unzipping' the DNA helix. This is essential for the replication process to occur.
6.
FLASHCARD QUESTION
Front
In which phase does DNA replication occur? Options: G1, Mitosis, S, G2
Back
S
Answer explanation
DNA replication occurs during the S phase of the cell cycle, where the cell synthesizes a complete copy of its DNA, preparing for cell division.
7.
FLASHCARD QUESTION
Front
What is the purpose of checkpoints in the cell cycle?
Back
To repair DNA damage
Answer explanation
Checkpoints in the cell cycle serve to monitor and repair DNA damage, ensuring that cells do not proceed to division with errors. This is crucial for maintaining genetic integrity.
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