Year 7 Biology Quiz: Understanding Cell Structure and Functions

1. What is the primary function of cytoplasm?

It serves as a barrier to protect the cell from the external environment.

MOST OF THE CHEMICAL REACTIONS HAPPEN INSIDE

It is responsible for storing genetic information.

Its main purpose is to provide structural support to the cell.

Cytoplasm is a gel-like substance that fills the cell and most of the chemical reactions necessary for life occur within it. This includes processes like protein synthesis, metabolism, and transportation of materials within the cell.

Explanation

Cytoplasm is a gel-like substance that fills the cell and most of the chemical reactions necessary for life occur within it. This includes processes like protein synthesis, metabolism, and transportation of materials within the cell.

2. What is the primary function of the nucleus in a cell?

Produces energy for the cell.

CONTROLS WHAT HAPPENS IN THE CELL.

Provides structural support to the cell.

Regulates water balance in the cell.

The nucleus primarily serves as the control center of the cell, overseeing various cellular activities and carrying genetic information.

Explanation

The nucleus primarily serves as the control center of the cell, overseeing various cellular activities and carrying genetic information.

3. What is the function of the cell membrane?

It provides structural support for the cell.

IT LET'S THINGS PASS IN AND OUT OF THE CELL

It stores genetic information.

It produces energy for the cell.

The cell membrane acts as a selective barrier that allows some substances to pass through while preventing others. It plays a crucial role in maintaining the cell's internal environment.

Explanation

The cell membrane acts as a selective barrier that allows some substances to pass through while preventing others. It plays a crucial role in maintaining the cell's internal environment.

4. What is the primary function of a chloroplast?

IT TAKES LIGHT IN TO MAKE FOOD.

It regulates the plant's temperature.

It stores water for the plant.

It helps in maintaining the plant's structure.

Chloroplasts are organelles in plant cells that carry out photosynthesis, converting light energy into chemical energy to produce food for the plant. This process is crucial for the plant's growth and survival.

Explanation

Chloroplasts are organelles in plant cells that carry out photosynthesis, converting light energy into chemical energy to produce food for the plant. This process is crucial for the plant's growth and survival.

5. What is the organelle responsible for photosynthesis in a plant cell?

Mitochondria

3

Endoplasmic Reticulum

Nucleus

Chloroplasts are the organelles in plant cells that conduct photosynthesis, converting light energy into sugars that the plant can use as food. The other organelles mentioned have different functions within the cell.

Explanation

Chloroplasts are the organelles in plant cells that conduct photosynthesis, converting light energy into sugars that the plant can use as food. The other organelles mentioned have different functions within the cell.