24-25 Midterm Review Part 6,7,8,9 Entrance Ticket

Flashcard
•
Biology
•
9th - 12th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the G1 checkpoint in the cell cycle?
Back
The G1 checkpoint is a control mechanism in the cell cycle that checks for cell size, nutrients, growth factors, and DNA damage before the cell proceeds to DNA synthesis.
2.
FLASHCARD QUESTION
Front
What happens at the G2 checkpoint?
Back
The G2 checkpoint ensures that DNA has been replicated correctly and checks for DNA damage before the cell enters mitosis.
3.
FLASHCARD QUESTION
Front
What is the purpose of the M checkpoint?
Back
The M checkpoint, also known as the spindle checkpoint, ensures that all chromosomes are properly attached to the spindle apparatus before the cell divides.
4.
FLASHCARD QUESTION
Front
Define diffusion in biological terms.
Back
Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.
5.
FLASHCARD QUESTION
Front
What factors affect the rate of diffusion?
Back
The rate of diffusion is affected by temperature, concentration gradient, surface area, and the size of the molecules.
6.
FLASHCARD QUESTION
Front
Explain the concept of concentration gradient.
Back
A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules during diffusion.
7.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
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