Organisition

Question 1

What are specialised cells

Answer 1

Cells that are designed to carry out a particular function

Question 2

What is differentiation ?

Answer 2

Development of a multicellular organism

Question 3

What is a tissue

Answer 3

Group of similar cells working together to carry out a particular function

Question 4

What is an organ

Answer 4

Group of different tissues working together to perform a certain function

Question 5

What is an organ system

Answer 5

Group of organs working together to perform a particular function

Question 6

Name 3 examples of tissues that are in humans?

Answer 6

• muscular tissue
• glandular tissue
• epithelial tissue

Question 7

Give 3 examples of an organ

Answer 7

Stomach
Liver
Heart

Question 8

Give 3 example of organ systems

Answer 8

Digestive system
Circulatory system
Nervous system

Question 9

What is a catalyst

Answer 9

Substance which increases the Rate of an reaction without being changed or used up in the reaction

Question 10

Give an example of a biological catalyst

Answer 10

Enzyme

Question 11

What is the enzymes optimum temperature

Answer 11

Where the enzyme is most active and works at its best

Question 12

What two things change how fast an enzyme works

Answer 12

Ph and temperature

Question 13

What breaks down proteins and what is product

Answer 13

Proteins are broken down by protease
The product is amino acids

Question 14

What breaks down starch and what is the product

Answer 14

Starch is broken down by carbohydrase/ amalayse . The product is sugars

Question 15

What breaks down lipids and what is the product

Answer 15

Lipids are broken down by lipase and the products are glycerol and fatty acids

Question 16

What is the purpose of bile

Answer 16

Bile neutralises the stomach acids and emulsifies fats

Question 17

Where is bile stored and produced and where does it work

Answer 17

Stored in the gall bladder . Produced in liver and works in the small intestine

Question 18

What is the test for sugars

Answer 18

Benedict’s test for sugars - add Benedict’s solution to tube and pace in a water bath the color will change from blue to yellow if sugar is present

Question 19

What is the test for starch

Answer 19

Iodine solution turns from orange to black

Question 20

What is the test for proteins

Answer 20

Birurets turns from blue to purple

Question 21

What is the test for lipids

Answer 21

Sudan 111 test - if fats are present the mixture will super ate into two layers and the top will go bright red

Question 22

How is the palisade mesophyll adapted for its function?

Answer 22

Tightly packed cells with lots of chloroplasts to absorb as much light as possible for photosynthesis

Question 23

How is the spongy mesophyll adapted for its function

Answer 23

Air spaces increase the surface area and allows gasses to diffuse quickly

Question 24

What is the function of guard cells

Answer 24

Control opening and closing of the stomata

Question 25

What is the function of xylem

Answer 25

Transport water and mineral ions from roots to rest of plant

Question 26

Give 3 adaptations of xylem

Answer 26

- made of dead cells - no end walls between cells - walls strengthens by lignin

Question 27

What is the function of phloem

Answer 27

Transport dissolved sugars from leaves to rest of plant

Question 28

What is the purpose of translocation

Answer 28

Transport dissolved sugars from leaves to the other parts of plant for respiration, growth and storage

Question 29

Define term transpiration

Answer 29

Movement of water from roots to the leaves through xylem

Question 30

What is the purpose of transpiration

Answer 30

- provide water to keep cells turgid - provide water to cells for photosynthesis - transport mineral ions to leaves

Question 31

Name 4 factors that effect the rate of transpiration

Answer 31

Wind speed, humidity, light intensity, temperature

Question 32

Why does increased light intensity effect transpiration

Answer 32

Stomata open wider to let more carbon dioxide into the leaf for photosynthesis

Question 33

Function of stomata

Answer 33

Allow gasses to diffuse in and out the plant

Question 34

Where are most stomata found

Answer 34

Underside of leaf

Question 35

What is the advantage of having a high number of stomata at this location

Answer 35

Reduces amount of water loss through evaporation