Parts Of A Cell

Question 0

Nucleus

Answer 0

The organelle that contains DNA and directs all cellular activities. The nucleus is surrounded by the nuclear envelope, which has pores to allow the transport of materials.

Question 1

Cell Membrane

Answer 1

A protective barrier for the cell. It allows the cell the transport of needed materials into the cell, and waste materials out of the cell. It is important for cell interaction an recognition of molecules.

Question 2

Cytoplasm

Answer 2

A gel-like substance inside the cell membrane: contains the nutrients required by the cell to carry on the life processes. Organelles are suspended in the cytoplasm. Allows for the movement of organelles and molecules within the cell.

Question 3

Cell Wall

Answer 3

Found in plants, bacteria and fungi. Is a rigid frame around the cell that provides strength and support.

Question 4

Chloroplasts

Answer 4

Found only in plants. They contain chlorophyll that produces a green colour. They are the sites of photosynthesis.

Question 5

Vacuoles/Vesicles

Answer 5

Membrane bound structures that serve to store nutrients, products of secretion, and fats. The central vacuole stores water for the cell. In plant cells, when the central vacuole swells, increasing the turgor pressure and causing the cell to become firm. Vesicles transport substances throughout the cell.

Question 6

Endoplasmic Reticulum

Answer 6

A series of interconnected small tubes that branch from the nuclear envelope. Materials can be transported through these tubes. Rough endoplasmic reticulum has ribosomes attached to it and is associated with protein synthesis. Smooth endoplasmic reticulum is associated with fat and oil production.

Question 7

Ribosomes

Answer 7

Dense looking granules formed of two parts. They may be attached to the endoplasmic reticulum or free in the cytoplasm. Are the sites where amino acids are assembled into proteins in the process of protein synthesis.

Question 8

Lysosomes

Answer 8

Membrane bound sacs in the cell in which digestion can go on. The various roles of lysosomes include defence against invading bacteria, destruction of damaged cell organelles, and controlled digestion of certain tissues during development.

Question 9

Golgi Apparatus

Answer 9

Composed of flat disc-shaped sacs involved in secretion. The Golgi receives substances from the endoplasmic reticulum and packages them for export.

Question 10

Mitochondria

Answer 10

Rod-like structures where reactions occur to convert chemical energy in sugars into energy the cell an use.

Question 11

Centrioles

Answer 11

Found only in animal cells. Paired structures that are important for the process of cell division.