Fall SE Revie 2024
Flashcard
•
Biology
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the sodium-potassium pump?
Back
The sodium-potassium pump is a type of active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients, using ATP for energy.
2.
FLASHCARD QUESTION
Front
What is facilitated diffusion?
Back
Facilitated diffusion is a passive transport process that allows substances to cross membranes with the assistance of special proteins, moving from an area of high concentration to low concentration.
3.
FLASHCARD QUESTION
Front
What is the optimum pH for enzyme activity?
Back
The optimum pH is the pH at which an enzyme's activity is highest. For many enzymes, this is around neutral pH (6.6 to 7.4), but it can vary depending on the specific enzyme.
4.
FLASHCARD QUESTION
Front
What is the main difference between prokaryotic and eukaryotic cells?
Back
The main difference is that eukaryotic cells have a nucleus and membrane-bound organelles, while prokaryotic cells do not.
5.
FLASHCARD QUESTION
Front
What are the stages of the cell cycle?
Back
The cell cycle consists of interphase (G1, S, G2 phases) and mitosis (prophase, metaphase, anaphase, telophase) followed by cytokinesis.
6.
FLASHCARD QUESTION
Front
Define active transport.
Back
Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy (ATP).
7.
FLASHCARD QUESTION
Front
What is osmosis?
Back
Osmosis is the diffusion of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.
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