Test: Structural Organization Of Cell - Class 9 MCQ

Cells are made of a variety of chemical substances - proteins, carbohydrates, fats or lipids and so on. Soil is not a component of  cell. 

The typical size of a prokaryotic cell is:

• Generally ranges from 1-10 micrometres.
• This size range is characteristic of bacteria and archaea.

Prokaryotic cells are smaller than eukaryotic cells, which makes them efficient in nutrient uptake and waste removal.

Eukaryotic cells generally range in size from about 5 to 100 micrometres. These cells are typically larger than prokaryotic cells, which are usually smaller (ranging from 1 to 10 micrometres).

• Option A is correct as it is within the typical size range of eukaryotic cells.
• Other options refer to measurements in nanometres, which are much smaller than the size of typical eukaryotic cells.

Therefore, the correct answer is A: 5-100 micrometre.

The term used to describe the entire content of a living cell, including the cytoplasm and the nucleus, is "protoplasm." Protoplasm is often referred to as the living substance of the cell.

Animal cells do not have cell Wall because they do not need them. Cell walls , which are found in plant cells , maintain cell shape, almost as if each cell has its own exoskeleton.

Unicellular organisms are made up of only one cell that carries out all the functions needed by the organism, while multicellular organisms use many different cells to function. Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions

Lysosomes are membrane-bound organelles that contain digestive enzymes. They play a crucial role in the cell's waste disposal system by:

• Digesting foreign materials, such as bacteria and food.
• Breaking down worn-out cell organelles.
• Transforming complex substances into simpler forms.

Lysosomes are essential for maintaining cellular cleanliness and health. They contain powerful enzymes capable of breaking down all organic material. However, if a cell is damaged, lysosomes may burst, leading to the digestion of the cell's own components. This is why lysosomes are often referred to as the 'suicide bags' of the cell.

Most prokaryotes contain one circular chromosome. DNA communicateswith the cytoplasm- so it allows direct connection to the transcription and translation. Contain only one copy of the gene. Non essential genes are stored outside of chromosome - in Plasmids.

In order for cells to function and survive, their organelles work together to carry out specific tasks and perform specific roles. Each organelle has its own role that contributes to the survival of the cell. This is called thr Division of labour. 

Chromosomes are thread-like structures located inside the nucleus of the cell. They carry genetic information in the form of DNA. Chromosomes are not found inside mitochondria, are not made only of proteins, and are present in both plant and animal cells. Therefore, option b is the correct answer.