Biology test paper for 3rd Form students covering cell structure and organization levels.

Solution to the Biology Test: Cells

#### Section A: Multiple Choice
1. Which of the following organelles is not found in an Animal Cell?
- a. Mitochondria
- b. Cytoplasm
- c. Chloroplast
- d. Nucleus

Explanation: Chloroplasts are only found in plant cells, as they are responsible for photosynthesis. Animal cells do not have chloroplasts.
- Answer: c. Chloroplast

2. The mitochondria of cells functions in _______.
- a. Captures sunlight
- b. Make proteins
- c. Releases energy
- d. Protects the cell

Explanation: Mitochondria are known as the "powerhouses" of the cell because they produce energy through cellular respiration.
- Answer: c. Releases energy

3. A tissue is made of a group of _______ of the same kind.
- a. Organs
- b. Paper
- c. Cells
- d. Systems

Explanation: Tissues are groups of similar cells that work together to perform a specific function.
- Answer: c. Cells

4. The scientist that first observed dead cork cells was?
- a. Robert Hooke
- b. James Brown
- c. Carolus Linnaeus
- d. Robert Brown

Explanation: Robert Hooke was the first person to observe and describe cells using a microscope. He named them "cells" after observing the resemblance to the small rooms (cells) in a monastery.
- Answer: a. Robert Hooke

5. The organelle that contains the green pigment, chlorophyll is known as _______.
- a. Ribosome
- b. Chloroplast
- c. Mitochondria
- d. Vacuole

Explanation: Chloroplasts contain chlorophyll, which is essential for photosynthesis in plant cells.
- Answer: b. Chloroplast

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#### Section B: True and False
6. The cell membrane allows substances to enter and exit a cell.
- True

Explanation: The cell membrane is selectively permeable, allowing certain substances to enter and exit the cell while blocking others.

7. Plant cells do not have a nucleus or cell membrane.
- False

Explanation: Plant cells, like all eukaryotic cells, have both a nucleus and a cell membrane.

8. Cell membrane gives plant cells their shape and protection.
- False

Explanation: While the cell membrane does provide some protection, the primary structure that gives plant cells their shape and rigidity is the cell wall, which is located outside the cell membrane.

9. Cell specialization is when a cell becomes an adult & grows in size.
- False

Explanation: Cell specialization refers to the process where cells become specialized for specific functions (e.g., muscle cells, nerve cells). It does not necessarily involve growing in size; rather, it involves changes in structure and function.

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#### Section C: Matching
The task is to match each diagram to the correct term showing the level of organization it belongs to.

1. Diagram 1 (Green cell with chloroplasts): This is a CELL because it shows a single plant cell with organelles like chloroplasts.
2. Diagram 2 (Cat): This is an ORGANISM because it represents a complete living being.
3. Diagram 3 (Muscle tissue): This is TISSUE because it shows a group of similar cells working together (muscle fibers).
4. Diagram 4 (Heart): This is an ORGAN because it is a complex structure composed of different types of tissues working together to perform a specific function.
5. Diagram 5 (Digestive system): This is a BODY SYSTEM because it represents a group of organs working together to perform a specific function (digestion).

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Final Answers:

#### Section A: Multiple Choice
1. c. Chloroplast
2. c. Releases energy
3. c. Cells
4. a. Robert Hooke
5. b. Chloroplast

#### Section B: True and False
6. True
7. False
8. False
9. False

#### Section C: Matching
1. CELL
2. ORGANISM
3. TISSUE
4. ORGAN
5. BODY SYSTEM

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Final Answer Box:

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\text{Section A:} \\
1. \text{c. Chloroplast} \\
2. \text{c. Releases energy} \\
3. \text{c. Cells} \\
4. \text{a. Robert Hooke} \\
5. \text{b. Chloroplast} \\
\\
\text{Section B:} \\
6. \text{True} \\
7. \text{False} \\
8. \text{False} \\
9. \text{False} \\
\\
\text{Section C: Matching} \\
1. \text{CELL} \\
2. \text{ORGANISM} \\
3. \text{TISSUE} \\
4. \text{ORGAN} \\
5. \text{BODY SYSTEM} \\
\end{array}
}