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WorksheetsCELL
Total questions: 10
Worksheet time: 6mins
Which statement BEST explains why the plasma membrane is described as a phospholipid bilayer?
It is made only of proteins
Hydrophobic heads face water on both sides
Hydrophilic heads face outward while hydrophobic tails face inward
It allows all substances to pass freely
A cell is placed in a hypotonic solution. What will MOST likely happen to the cell?
Water moves out and the cell shrinks
Water moves in and the cell swells
No net movement of water
The cell dies immediately
Which transport process moves substances AGAINST their concentration gradient?
Simple diffusion
Facilitated diffusion
Osmosis
Active transport
The sodium–potassium pump transports (a) sodium ions out of the cell and two potassium ions into the cell for each ATP used.
A red blood cell is placed in a solution with a much higher solute concentration than its cytoplasm. After a few minutes, the cell becomes smaller and shriveled.
Which process BEST explains what happened to the cell?
Active transport
Facilitated diffusion
Osmosis
Endocytosis
Which organelle is responsible for modifying, packaging, and transporting proteins produced in the endoplasmic reticulum?
Ribosome
Golgi apparatus
Lysosome
Mitochondria
Which of the following substances can pass directly through the lipid bilayer by simple diffusion?
Glucose
Oxygen (O₂)
Sodium ions (Na⁺)
Starch
Receptor-mediated endocytosis differs from other types of endocytosis because it involves (a) on the cell membrane that bind to specific molecules.
Facilitated diffusion is different from simple diffusion because facilitated diffusion __________.
Requires ATP
Moves substances against the concentration gradient
Uses transport proteins
Occurs only in plant cells
A plant cell placed in a hypotonic solution becomes turgid rather than bursting. Which structure prevents the cell from bursting?
Plasma membrane
Cytoplasm
Cell wall
Vacuole
