Honors Biology: Unit 2 Test Questions
with Certified Solutions
What is the role of the cytoskeleton in the cell?
✔✔ The cytoskeleton provides structural support, helps maintain cell shape, and facilitates
movement of materials within the cell.
How do plant cells differ from animal cells in terms of organelles?
✔✔ Plant cells have chloroplasts and a large central vacuole, while animal cells do not. Animal
cells have lysosomes, which are less common in plant cells.
What is the function of the vacuole in a plant cell?
✔✔ The vacuole stores nutrients, waste products, and helps maintain turgor pressure within the
plant cell.
How does active transport differ from passive transport?
✔✔ Active transport requires energy to move substances against their concentration gradient,
while passive transport does not require energy and moves substances along their concentration
gradient.
1
,What is the role of the cell wall in plant cells?
✔✔ The cell wall provides additional structural support and protection to the plant cell, helping
it maintain its shape.
How do enzymes speed up chemical reactions?
✔✔ Enzymes lower the activation energy required for a reaction to occur, increasing the reaction
rate.
What is the function of the plasma membrane’s lipid bilayer?
✔✔ The lipid bilayer acts as a barrier to control the movement of substances into and out of the
cell while allowing selective permeability.
What is the significance of the fluid mosaic model?
✔✔ The fluid mosaic model describes the cell membrane as a flexible, dynamic structure with
proteins and lipids that move laterally within the bilayer.
How do cellular junctions contribute to tissue function?
2
, ✔✔ Cellular junctions connect cells to each other, allowing communication and coordination
between cells in tissues.
What is the main purpose of cellular respiration?
✔✔ The main purpose of cellular respiration is to produce ATP, which provides energy for
cellular processes.
What is the function of the cell nucleus?
✔✔ The cell nucleus houses the cell’s DNA and controls gene expression and cell activities.
How does the structure of the cell membrane contribute to its function?
✔✔ The cell membrane’s phospholipid bilayer and embedded proteins allow selective
permeability, controlling what enters and exits the cell.
What role do mitochondria play in cellular processes?
✔✔ Mitochondria produce ATP through cellular respiration, providing energy for various
cellular functions.
How do ribosomes contribute to protein synthesis?
3
with Certified Solutions
What is the role of the cytoskeleton in the cell?
✔✔ The cytoskeleton provides structural support, helps maintain cell shape, and facilitates
movement of materials within the cell.
How do plant cells differ from animal cells in terms of organelles?
✔✔ Plant cells have chloroplasts and a large central vacuole, while animal cells do not. Animal
cells have lysosomes, which are less common in plant cells.
What is the function of the vacuole in a plant cell?
✔✔ The vacuole stores nutrients, waste products, and helps maintain turgor pressure within the
plant cell.
How does active transport differ from passive transport?
✔✔ Active transport requires energy to move substances against their concentration gradient,
while passive transport does not require energy and moves substances along their concentration
gradient.
1
,What is the role of the cell wall in plant cells?
✔✔ The cell wall provides additional structural support and protection to the plant cell, helping
it maintain its shape.
How do enzymes speed up chemical reactions?
✔✔ Enzymes lower the activation energy required for a reaction to occur, increasing the reaction
rate.
What is the function of the plasma membrane’s lipid bilayer?
✔✔ The lipid bilayer acts as a barrier to control the movement of substances into and out of the
cell while allowing selective permeability.
What is the significance of the fluid mosaic model?
✔✔ The fluid mosaic model describes the cell membrane as a flexible, dynamic structure with
proteins and lipids that move laterally within the bilayer.
How do cellular junctions contribute to tissue function?
2
, ✔✔ Cellular junctions connect cells to each other, allowing communication and coordination
between cells in tissues.
What is the main purpose of cellular respiration?
✔✔ The main purpose of cellular respiration is to produce ATP, which provides energy for
cellular processes.
What is the function of the cell nucleus?
✔✔ The cell nucleus houses the cell’s DNA and controls gene expression and cell activities.
How does the structure of the cell membrane contribute to its function?
✔✔ The cell membrane’s phospholipid bilayer and embedded proteins allow selective
permeability, controlling what enters and exits the cell.
What role do mitochondria play in cellular processes?
✔✔ Mitochondria produce ATP through cellular respiration, providing energy for various
cellular functions.
How do ribosomes contribute to protein synthesis?
3
