Cells

Question 1

What are cells?

Answer 1

Building blocks of living organisms. They are either multicellular or unicellular. Multicellular is more than one cell and unicellular is single cells

Question 2

Functions of a cell- nucleus

Answer 2

It contains generic information like DNA. It controls cell activities.

Question 3

Functions of a cell- plasmid

Answer 3

Ring of small genetic material in a bacterial cell.

Question 4

Functions of a cell- cell membrane

Answer 4

A selectively permutable membrane that controls entry and exit of substances such as CO2, O2 and glucose and waste from the cells

Question 5

Functions of the cell- cytoplasm

Answer 5

Is a watery jelly like material that contains organelles and a lot of chemical reactions occur here.

Question 6

Functions of a cell- cell wall

Answer 6

The outer layer of a cell that helps structural support.

Question 7

Functions of a cell- vacuole

Answer 7

Makes carbohydrates in green plants using light energy in the process in photosynthesis

Question 8

Functions in a cell- mitochondria

Answer 8

The main site of ATP production in arsonists respiration

Question 9

Functions of a cell- ribosome

Answer 9

This is where protein synthesis happens in the cell

Question 10

What are cell membranes made up of?

Answer 10

Phospholipid and protein. Some membranes also have pores

Question 11

Name the three transportation methods which happens within cell membranes

Answer 11

Diffusion, osmosis, active transport. This refers to the movement of molecules along a concentration gradient

Question 12

What is diffusion?

Answer 12

Diffusion is the pass of movement of molecules through a selectively permeable membrane from a high concentration to a low concentration. A good example of this is exchange of oxygen to carbon dioxide through our lungs. Another example of this is the or obsorbsion of glucose and amino acids in the small intensive in mammals.

Question 13

What is osmosis?

Answer 13

Osmosis is the movement of water. It goes from a high concentration to a low concentration. An example of this is watering plants, after rain the soil is wet and high concentrated and through diffusion the plant obsorbs the water.

Question 14

What is active transport?

Answer 14

Active transport is a movement of molecules or ions from a region from a low to a high. Active transport require energy for membrane proteins to move against the concentration gradient. An example of this is a plant called nitella. requires potassium ions to survive. The pant uses energy through a respiration process in order from a high concentration to a low concentration

Question 15

What happens to and,al cells when you place it in water? -animal cell.

Answer 15

Higher concentration- if animal cells are placed in a solution with a higher concentration, the cell takes the water through osmosis and he cell wall expands or bursts.
Lower concentration- if placed in lower concentration water will be lost by osmosis and the cell will shrink.

Question 16

Plant cells and water

Answer 16

Higher concentration- the water will move through osmosis and the vacuole swells. When the valcuole hits the cell wall it becomes turgid.
Low concentration- cells lose water through osmosis. The valcuole will eventually pull away from the cell membrane and this is called plasmolysed. In the end the whole cell tissue is flasid.

Question 17

What is a concentration gradient?

Answer 17

It’s the different concentration, solution, cells and the movement type.

Question 18

What is phosolipids

Answer 18

This is found in the membrane and is made up of fatty acids and glycerol

Question 19

Why does an Anaximander cell that is placed in salt water shrink

Answer 19

Because they is a higher concentration in the cell than sea water the valcuole would shrink