Cell Organelles and Compartmentalization Quiz

Which of the following is considered an organelle?

• Cell wall

• Cytoskeleton

• Nucleus

• Cytoplasm

Answer explanation

An organelle is a specialized structure within a cell that performs a specific function. The Nucleus is responsible for storing the cell's genetic material and controlling cellular activities. It is distinct from the other options mentioned, such as the Cell wall, Cytoskeleton, and Cytoplasm, which have different functions within the cell.

Tags

NGSS.MS-LS1-2

Which of the following is an example of an organelle enclosed by a single membrane?

• Ribosome

• Plasma membrane

• Vesicle

• Nucleus

Answer explanation

The question asks for an example of an organelle enclosed by a single membrane. A vesicle is a small, membrane-bound sac that transports molecules within cells. It is enclosed by a single membrane and plays a role in various cellular processes. The other options, such as Ribosome, Plasma membrane, and Nucleus, do not fit the criteria of being enclosed by a single membrane.

Why are the cell wall, cytoskeleton, and cytoplasm not considered organelles?

• They are not found in all types of cells

• They do not have specific functions

• They are not enclosed by a membrane

• They are too small to be considered organelles

Answer explanation

The cell wall, cytoskeleton, and cytoplasm are not considered organelles because they are not enclosed by a membrane. Unlike other organelles, they do not have a protective membrane surrounding them. This lack of membrane distinguishes them from true organelles. The cell wall, cytoskeleton, and cytoplasm play important roles in cell structure and function, but they are not classified as organelles due to their lack of membrane enclosure.

What is the meaning of 'compartmentalization' within cells?

• The separation of incompatible biochemical processes

• The concentration of metabolites and enzymes

• The formation of organelles within the cytoplasm

• The movement of organelles within the cell

Answer explanation

The meaning of 'compartmentalization' within cells refers to the separation of incompatible biochemical processes. This process allows different cellular activities to occur simultaneously without interfering with each other. Compartmentalization ensures that specific reactions and pathways take place in specific locations within the cell, optimizing efficiency and preventing unwanted interactions. It also enables the regulation and control of cellular processes by creating distinct environments for different biochemical reactions. This concept is essential for maintaining the overall functionality and organization of cells.

Which of the following is an advantage of compartmentalization within cells?

• Increased cell size

• Enhanced cell division

• Improved cell communication

• Efficient separation of biochemical processes

Answer explanation

Compartmentalization within cells provides an efficient separation of biochemical processes. This allows different cellular activities to occur simultaneously without interfering with each other. It helps in maintaining the integrity and functionality of cellular components. Increased cell size, enhanced cell division, and improved cell communication are not advantages of compartmentalization.

_____ is an example of compartmentalization within cells.

Answer explanation

Compartmentalization within cells is a crucial process for organizing cellular activities. In this context, lysosomes, phagocytic vacuoles, ribosomes, and the plasma membrane are all examples of cellular compartments. However, lysosomes stand out as they contain enzymes that break down waste materials. This process helps maintain cellular homeostasis and ensures proper functioning. Therefore, lysosomes exemplify compartmentalization within cells.

What is the benefit of compartmentalization of lysosomes and phagocytic vacuoles in cells?

• Prevention of cell division

• Enhanced cellular respiration

• Efficient digestion of waste materials

• Increased cell membrane stability

Answer explanation

The benefit of compartmentalization of lysosomes and phagocytic vacuoles in cells is efficient digestion of waste materials. This allows cells to break down and eliminate waste products effectively. Compartmentalization ensures that the digestive enzymes and other components necessary for digestion are concentrated in specific areas, optimizing the process. By separating the digestion process from other cellular activities, cells can maintain a higher level of efficiency in waste disposal. This helps to keep the cell clean and functioning properly.

Tags

NGSS.HS-LS2-3

Which of the following is not considered an organelle?

• Nucleus

• Ribosome

• Plasma membrane

• Cytoskeleton

Answer explanation

The nucleus, ribosome, and plasma membrane are all considered organelles. The cytoskeleton, on the other hand, is a network of protein filaments that provides structural support to the cell, but it is not considered an organelle.

Which of the following is an example of an organelle enclosed by a double membrane?

• Lysosome

• Golgi apparatus

• Endoplasmic reticulum

• Mitochondrion

Answer explanation

Lysosome, Golgi apparatus, and endoplasmic reticulum, do not have a double membrane and do not play a direct role in energy production. The mitochondrion is an example of an organelle enclosed by a double membrane. It is responsible for producing energy in the form of ATP through cellular respiration. This organelle contains its own DNA and is often referred to as the powerhouse of the cell.

Why is the cytoplasm not considered an organelle?

• It is not found in all types of cells

• It does not have a specific function

• It is not enclosed by a membrane

• It is too small to be considered an organelle

Answer explanation

The cytoplasm is not considered an organelle because it is not enclosed by a membrane. Unlike other organelles, such as the nucleus or mitochondria, the cytoplasm is a gel-like substance that fills the cell and surrounds the organelles. It does not have a specific function and is found in all types of cells. However, it is not considered an organelle because it lacks a membrane boundary. Its small size is not the reason for its exclusion as an organelle.