Question 1

Which of the following best describes the main difference between unicellular and multicellular organisms as discussed in the study materials?

Accepted Answer

Unicellular organisms perform all life functions within a single cell, whereas multicellular organisms have specialized cells for different functions.

Question 2

In the context of plant cells, which organelle is primarily responsible for photosynthesis, and what is the main pigment involved?

Accepted Answer

Chloroplast; chlorophyll

Question 3

A student observes a plant cell under a microscope and notices a large, membrane-bound structure filled with water and dissolved substances. Which structure is this, and what is its primary function?

Accepted Answer

Central vacuole; maintaining turgor pressure

Question 4

Which of the following best explains why plant cells do not burst when placed in pure water, while animal cells do?

Accepted Answer

Plant cells have a rigid cell wall that resists the osmotic pressure, while animal cells lack this structure.

Question 5

During an experiment, a student stains an onion cell with Janus Green dye and observes small blue-green ovals moving within the cytoplasm. What are these structures, and what is their primary function?

Accepted Answer

Mitochondria; generating ATP through cellular respiration

Question 6

Which of the following best describes the function of plasmodesmata in plant cells?

Accepted Answer

They are channels that allow the movement of water, ions, and small molecules between adjacent plant cells.

Question 7

A student prepares a wet mount of Elodea and observes small green structures moving within the cell. What is this movement called, and what is its biological significance?

Accepted Answer

Cytoplasmic streaming; helps distribute nutrients and organelles within the cell

Question 8

Which of the following statements about amyloplasts is correct?

Accepted Answer

Amyloplasts are a type of plastid that stores starch in plant cells.

Question 9

If a plant cell is placed in a hypertonic solution, what will most likely happen to the cell?

Accepted Answer

The cell will lose water and the plasma membrane will pull away from the cell wall (plasmolysis).

Question 10

Which of the following best describes the role of mitochondria in plant cells?

Accepted Answer

They generate most of the cell's ATP through cellular respiration.

Question 11

A student observes a cross-section of pine wood and notes the presence of long, empty cells that conduct water. What are these cells called?

Accepted Answer

Tracheids

Question 12

Which of the following is a correct statement about fungal hyphae as described in the study materials?

Accepted Answer

Hyphae are multicellular filaments that make up the body of a fungus and can be either septate or coenocytic.

Question 13

Which of the following best explains the function of spores in fungi?

Accepted Answer

Spores are reproductive cells that allow fungi to disperse and colonize new environments.

Question 14

A student stains a section of red bell pepper and observes red organelles at the periphery of the cells. What are these organelles, and what is their function?

Accepted Answer

Chromoplasts; store pigments such as carotenoids

Question 15

Which of the following equations correctly represents the process of photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 16

Which of the following best describes the difference between septate and coenocytic hyphae in fungi?

Accepted Answer

Septate hyphae have cross-walls dividing the cells, while coenocytic hyphae lack cross-walls and have many nuclei in a continuous cytoplasm.

Question 17

A plant cell is observed to have a large number of amyloplasts. In which type of tissue is this cell most likely found?

Accepted Answer

Storage tissue such as potato tuber

Question 18

Which of the following best explains why mitochondria are considered the 'powerhouse' of the cell?

Accepted Answer

They generate ATP, the main energy currency of the cell, through cellular respiration.

Question 19

Which of the following is a correct statement about the function of the central vacuole in plant cells?

Accepted Answer

It stores water, ions, and nutrients, and helps maintain the structural integrity of the plant cell.

Question 20

A fungal colony is observed to have a mycelium composed of hyphae with no cross-walls and many nuclei. What term best describes this type of hyphae?

Accepted Answer

Coenocytic

General Biology Study Notes: Eukaryotic Plant and Fungal Cells Lab 12

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