2.1 CELL - STRUCTURE & FUNCTION (FORM 1)

The basic unit that makes up living things is ......................

• CELL

• ATOM

• PARTICLE

• CYTOPLASM

In the year 1665, an English scientist named ______________ discovered a small box on a piece of cork that was called a cell.

• Leornado da Vinci

• Edoard Manet

• Robert Hooke

• Robin Hood

Why can cells only be observed under a microscope?

• Cells are very small

• Cells can be seen with the naked eye

• Cells are millimeter-sized

• Cells are not alive

What cell is being observed in the diagram?

• Human cheek cell

• Onion epidermal cell

• Tiger skin cell

• Sperm cell

What solution causes the cells in the diagram observed under the microscope to appear yellow?

• Methylene blue solution

• Iodine solution

• Distilled water

What solution is used to stain animal cells?

• Methylene blue solution

• Iodine solution

• Distilled water

• Blue ink

Name the structure in human cheek cells that is dark blue in colour after using the methylene blue solution.

• Cytoplasm

• Cell membrane

• Nucleus

• Vacuole

Select the structures in the onion epidermal cells that can be observed under a light microscope.

• Nucleus

• Cytoplasm

• Cell wall

• Cell membrane

• Chloroplast

Select all the similarities between plant cells and animal cells.

• Have a cell wall

• Have a nucleus and cytoplasm

• Have a cell membrane

• Have vacuoles and chloroplasts

• Have mitochondria

Label the cell components in the diagram.

a

b

c

d

Mitochondrion

Cell membrane

Nucleus

Cytoplasm