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Science Baitang 10–12

Biology

Ibinahagi ni Jericoh Ramoran (RJericoh TV) 2 oras ang nakalipas 30 T Nakuha nang 0 beses 1 na laro 2 na mag-aaral ang naglaro
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1

A plant cell is placed in a concentrated salt solution. After a few minutes, its cell membrane pulls away from the cell wall. Which process most directly causes this change?

A Osmosis moves water out of the cell.
B Active transport moves salt into the vacuole.
C Facilitated diffusion moves water against its gradient.
D Endocytosis removes water from the cytoplasm.
2

A student places a red blood cell in distilled water. After several minutes, the cell swells and bursts. Which explanation best accounts for the observation?

A Water enters the cell because the surrounding solution is hypotonic.
B Solutes enter the cell and force water out through the membrane.
C Water leaves the cell because the surrounding solution has fewer solutes.
D The cell uses ATP to pump excess water into its cytoplasm.
3

Which of the following best describes the role of the cell membrane in maintaining cellular homeostasis?

A It facilitates the unrestricted movement of all molecules, ensuring equal concentrations inside and outside the cell.
B It provides structural support and is completely impermeable to all molecules.
C It acts as a rigid barrier that prevents any substances from entering or leaving the cell.
D It selectively regulates the movement of substances, allowing the cell to maintain a stable internal environment.
4

Which transport mechanism requires the cell to expend energy in the form of ATP?

A Facilitated diffusion
B Diffusion
C Active transport
D Osmosis
5

A red blood cell is placed in a hypotonic solution. What is the most likely outcome?

A The cell will remain unchanged because the solution is isotonic.
B The cell will shrink as water leaves the cell.
C The cell will actively pump water out to maintain its shape.
D The cell will swell and potentially burst as water enters.

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