Cells (Yr_7)

Question 1

What are the parts of a plant cell?

Answer 1

Cell wall, cell membrane, mitochondria, cytosol, chloroplast, vacuole, ribosome, rough endoplasmic reticulum, golgi body

Question 2

What is cytosol?

Answer 2

A jelly-like substance which other organelles float in.

Question 3

What is chloroplast?

Answer 3

Chloroplast is an organelle which collects sunlight and then uses it to convert water and CO2 into sugar. This process is otherwise known as photosynthesis.

Question 4

What is mitochondria?

Answer 4

Mitochondria is an organelle which converts sugar into energy packs.

Question 5

What is a vacuole?

Answer 5

A storage bubble for fluid, nutrients and waste. In plant cells, it expands and makes the plant cell stiff. It shrinks when dehydrated.

Question 6

What is a cell wall?

Answer 6

The cell wall provides protection and strength for the cell.

Question 7

What is a cell membrane?

Answer 7

The cell membrane is the thing that lets stuff in and out of the cell.

Question 8

What is a nucleus?

Answer 8

The nucleus holds the cell’s DNA which controls the cell’s activities.

Question 9

What are the parts if an animal cell?

Answer 9

Nucleus, vacuole, cell membrane, mitochondria.

Question 10

What are the parts of a bacteria cell?

Answer 10

Chromosomal DNA, cytoplasm, plasma membrane, ribosomes, cell wall, flagella

Question 11

What is a ribosome?

Answer 11

The site of protein production of a cell.

Question 12

What are specialised cells?

Answer 12

Cells that have different structures that allow them to perform different functions in the body.

Question 13

What are the features of a red blood cell?

Answer 13

• carries oxygen through the body
• red pigment called “haemoglobin” which attaches to oxygen
• no nucleus to give space for haemoglobin
• flattened disc for surface area to absorb and release oxygen
• flexibility to allow it to bend and squeeze through the smallest blood veins

Question 14

What are the features of the intestinal lining cell?

Answer 14

• absorbs liquids flowing through the intestines
• microvilli (tiny finger-like projections)
• microvilli increases surface area which allows liquids to absorbed quicker

Question 15

What are the features of a fat cell?

Answer 15

• used for storing energy for future use
• found under skin and around internal organs
• contains droplets of fat in cytosol which expand and shrink as energy is gained or used

Question 16

What is cell division?

Answer 16

It is when one parent cell splits into two daughter cells which are exact copies of the parent cell.

Question 17

Why is cell division important?

Answer 17

Around 60 billion cells are lost a day so cell division is essential to replacing the lost cells. This type of cell division is called ‘mitosis’.

Question 18

What is the difference between unicellular and multicellular organisms?

Answer 18

Unicellular organisms are made of one cell while multicellular organisms are made up of two or more cells.

Question 19

What are the differences between eukaryotes and prokaryotes?

Answer 19

Prokaryotes are always single-celled organisms and eukaryotes are mostly multicellular organisms. prokaryotes don’t have a nucleus while eukaryotes do and prokaryotes do not contain membrane bound organelles while eukaryotes do.