Biology- Grade 10 Science

1. What is the primary function of the cell membrane?

To provide structure and support to the cell.

To produce energy for the cell.

To store genetic material within the cell.

The cell membrane primarily acts as a barrier to control the movement of molecules in and out of the cell, maintaining homeostasis.

Explanation

The cell membrane primarily acts as a barrier to control the movement of molecules in and out of the cell, maintaining homeostasis.

2. What is the main function of the cell wall?

Stores genetic material in the cell.

Regulates the movement of substances in and out of the cell.

Produces energy for the cell.

The cell wall is responsible for providing structural support and protection to the cell by surrounding the cell membrane and maintaining the cell's shape. It also helps regulate the osmotic pressure of the cell and prevents it from bursting or collapsing.

Explanation

The cell wall is responsible for providing structural support and protection to the cell by surrounding the cell membrane and maintaining the cell's shape. It also helps regulate the osmotic pressure of the cell and prevents it from bursting or collapsing.

3. What is the gel-like substance that fills the inside of cells?

Nucleus

Mitochondria

Ribosomes

Cytoplasm is a jelly-like substance that fills the inside of cells and surrounds the organelles. It plays a crucial role in various cellular processes such as metabolism and provides a medium for the organelles to function within the cell.

Explanation

Cytoplasm is a jelly-like substance that fills the inside of cells and surrounds the organelles. It plays a crucial role in various cellular processes such as metabolism and provides a medium for the organelles to function within the cell.

4. What is the function of the nucleus in a cell?

Aids in digestion

Regulates cell division

Commandcentre of the cellprotects the geneticinformation

Produces energy for the cell

The nucleus serves as the command centre of the cell, containing genetic information and controlling cell activities.

Explanation

The nucleus serves as the command centre of the cell, containing genetic information and controlling cell activities.

5. What is the function of the nucleolus?

The nucleolus is responsible for producing energy for the cell.

The nucleolus is responsible for breaking down waste within the cell.

The nucleolus is responsible for storing DNA.

The nucleolus is a suborganelle within the nucleus of a cell that is primarily involved in producing ribosomes, not energy production, DNA storage, or waste breakdown.

Explanation

The nucleolus is a suborganelle within the nucleus of a cell that is primarily involved in producing ribosomes, not energy production, DNA storage, or waste breakdown.

6. What are the cell parts exclusively found in plant cells?

Nucleus

Cell wall, chloroplast, vacuole

Mitochondria

Lysosome

Plant cells have unique structures like the cell wall, chloroplast, and vacuole which are not found in animal cells. The incorrect answers, nucleus, mitochondria, and lysosome, are found in both plant and animal cells.

Explanation

Plant cells have unique structures like the cell wall, chloroplast, and vacuole which are not found in animal cells. The incorrect answers, nucleus, mitochondria, and lysosome, are found in both plant and animal cells.

7. What is the cell part only found in animal cells?

Chloroplast

Vacuole

Centrosome

Cell wall

Centrosomes are only found in animal cells and play a role in cell division.

Explanation

Centrosomes are only found in animal cells and play a role in cell division.