What is the term for the movement of water through a selectively permeable membrane?
  • Simple diffusion
  • Osmosis
  • Active transport
  • Endocytosis
What is the net movement of particles from a higher concentration to a lower concentration without requiring a membrane called?
  • Osmosis
  • Plasmolysis
  • Diffusion
  • Active transport
How do plant roots primarily absorb water from the surrounding soil?
  • Active pumping
  • Capillary action
  • Osmosis
  • Facilitated diffusion
What type of solution has a solute concentration that is completely equal to the solute concentration inside the cell?
  • Hypotonic solution
  • Hypertonic solution
  • Isotonic solution
  • Saturated solution
If the solute concentration of the extracellular medium is less than the intracellular medium, the solution is:
  • Isotonic
  • Hypertonic
  • Hypotonic
  • Super-saturated
If a cell is placed in a hypertonic solution, what will be the net movement of water?
  • Water will move into the cell.
  • Water will move out of the cell.
  • There will be absolutely no movement of water.
  • Solute will move into the cell instead of water.
What is the average structural thickness of a typical cell membrane?
  • 7 to 10 micrometers (μm)
  • 7 to 10 nanometers (nm)
  • 1 to 2 millimeters (mm)
  • 100 to 200 nanometers (nm)
Which widely accepted model explains the structural arrangement of lipids and proteins in the cell membrane?
  • Lock and Key model
  • Fluid-mosaic model
  • Sandwich model
  • Unit membrane model
Structurally, the cell membrane consists of how many layers of fat molecules?
  • A single layer
  • A lipid bilayer
  • Three lipid layers
  • A protein bilayer
In a cell membrane's lipid bilayer, how are the lipid molecules oriented?
  • Water-repelling tails outward, water-attracting heads inward
  • Water-attracting heads outward, water-repelling tails inward
  • Both heads and tails face completely outward
  • Heads face left, tails face right
Why is the cell membrane considered "fluid"?
  • It is composed entirely of liquid water.
  • Molecules within it can move sideways, flip, and rotate.
  • It lacks any definite boundary.
  • It dissolves easily when heated.
Which molecules are embedded in the lipid bilayer and act like gatekeepers to help substances pass?
  • Carbohydrates
  • Proteins
  • Nucleic acids
  • Starches
Why is the fluid-mosaic model given the descriptor word "mosaic"?
  • It changes color under light.
  • Molecules are arranged like tiles in a mosaic pattern.
  • It contains crystalline stone deposits.
  • It is highly rigid and glassy.
Which gas moves across the membrane of alveoli into the blood down its concentration gradient?
  • Nitrogen
  • Carbon dioxide
  • Oxygen
  • Hydrogen
If mung bean seeds are kept in a highly concentrated salt solution after being soaked in water, they will:
  • Swell further
  • Lose water and shrink
  • Germinate instantly
  • Turn into single cells
Which group of organisms lacks a cell wall completely?
  • Plants
  • Fungi
  • Bacteria
  • Animals
What is the primary function of the cell wall in plant cells?
  • To synthesize proteins
  • To provide rigidity and withstand environmental stresses
  • To control the entry of genetic codes
  • To generate energy molecules
What is the primary carbohydrate chemical component that makes up the plant cell wall?
  • Glycogen
  • Starch
  • Cellulose
  • Chitin
What role does cellulose play when consumed in the human diet?
  • Provides instant caloric energy
  • Acts as roughage, aiding in digestion
  • Forms the base of blood plasma proteins
  • Synthesizes enzymes inside liver cells
What is the permeability nature of a typical plant cell wall?
  • Selectively permeable
  • Impermeable to all fluids
  • Completely permeable to water and some dissolved minerals
  • Only permeable to gases
When a plant cell loses water in a concentrated sugar solution, why does it maintain its overall outer shape?
  • The plasma membrane solidifies.
  • The rigid cell wall maintains the shape.
  • The nucleus expands.
  • Vacuoles take up air.
What is the phenomenon where the inner contents of a plant cell shrink away from its cell wall due to water loss?
  • Cytolysis
  • Plasmolysis
  • De-plasmolysis
  • Endosmosis
Which common dye stain is used to prepare temporary slides of onion peels in school labs?
  • Methylene blue
  • Safranin
  • Iodine crystal
  • Acetocarmine
Which dye stain is typically used for coloring human cheek cell preparations for observation?
  • Safranin
  • Methylene blue
  • Crystal violet
  • Eosin
Under a microscope, onion peel cells look regularly arranged and box-shaped, while human cheek cells appear:
  • Perfectly circular
  • Irregularly arranged
  • Long and thread-like
  • Star-shaped
What are the three basic structural components found in most eukaryotic cells?
  • Plasma membrane, cytoplasm, and a prominent nucleus
  • Cell wall, capsule, and nucleoid
  • Flagella, cilia, and ribosomes
  • Mitochondria, lysosome, and chloroplast
Which type of cell lacks a well-defined nuclear membrane and membrane-bound organelles?
  • Plant cell
  • Animal cell
  • Prokaryotic cell
  • Fungal cell
What does the term "eukaryotic" mean based on its Greek roots?
  • Without nucleus
  • True nucleus
  • Small nucleus
  • False nucleus
What is the typical diameter range of a prokaryotic cell?
  • 10 to 100 μm
  • 1 to 10 μm
  • 100 to 500 μm
  • 0.1 to 0.5 nm
What is the typical diameter range of an ordinary eukaryotic cell?
  • 1 to 10 μm
  • 10 to 100 μm
  • 1 to 10 mm
  • 200 to 500 μm
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0