FBISE, NCP & NBF-aligned resources for Classes 9–12
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Biology Chapter 3 : Topic 3
Cell Organelles and Their Functions
1 / 15
Which organelle is best described as the “control center” of the cell?
Reasoning: The nucleus controls all cell activities by containing genetic material (DNA).
2 / 15
The main function of mitochondria is to:
Reasoning: Mitochondria are the site of aerobic respiration and produce ATP (energy).
3 / 15
The cell membrane is important because it:
Reasoning: The cell membrane is selectively permeable and regulates transport.
4 / 15
Which organelle is directly involved in protein synthesis?
Reasoning: Ribosomes are the site where proteins are assembled from amino acids.
5 / 15
Which structure is common to both plant and animal cells and contains genetic information?
Reasoning: The nucleus contains DNA in all eukaryotic cells.
6 / 15
The shape of mitochondria is best described as:
Reasoning: Mitochondria are typically rod-shaped or oval structures.
7 / 15
Which feature increases the surface area inside mitochondria for energy production?
Reasoning: Cristae are folds in the inner membrane that increase surface area for ATP production.
8 / 15
In a labeled diagram of a cell membrane, you would expect to see:
Reasoning: The cell membrane consists of a phospholipid bilayer.
9 / 15
What is the role of the nucleolus inside the nucleus?
Reasoning: The nucleolus produces ribosomal RNA and assembles ribosomes.
10 / 15
Which organelle modifies and packages proteins for transport?
Reasoning: The Golgi apparatus processes, modifies, and packages proteins.
11 / 15
A student sketches a cell without a nucleus. What type of cell is it most likely?
Reasoning: Prokaryotic cells like bacteria do not have a true nucleus.
12 / 15
Which organelle would be most active in a muscle cell requiring high energy?
Reasoning: Muscle cells need more ATP, so they contain more mitochondria.
13 / 15
The cell membrane is mainly composed of:
Reasoning: The cell membrane is made of phospholipids and proteins.
14 / 15
Which organelle contains enzymes that digest waste materials in animal cells?
Reasoning: Lysosomes contain digestive enzymes for cellular waste breakdown.
15 / 15
In a labeled diagram, ribosomes are usually shown as:
Reasoning: Ribosomes appear as small dots attached to rough ER or floating in cytoplasm.
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