Biology

Question 1

What is the role of coronary arteries

Answer 1

To supply the heart muscles with glucose and oxygen to keep the heart contracting

Question 2

What is a double circulatory system

Answer 2

Blood goes in the heart oxygenated and is pumped out deoxygenated

Question 3

What is the function of a chloroplast

Answer 3

To photosynthesize, contain chlorophyll which absorbs light energy for photosynthesis

Question 4

What is the function of the vacuole

Answer 4

To store water and waste removal

Question 5

What is the function of mitochondria

Answer 5

Provides the cells with energy, breaks down sugars (e.g glucose) in aerobics respiration (provides the energy)

Question 6

What cell is a prokaryote?

Answer 6

Bacteria cell

Question 7

What does the plasmid do (bacteria)

Answer 7

Carries genes that offer antibiotic resistance

Question 8

What is water concentration

Answer 8

The amount of water compared to other solutes that are dissolved in the water, e.g sugar or salt

Question 9

What chemical is used to test for protein

Answer 9

Biurets

Question 10

What colour change does biurets undergo

Answer 10

Blue → lilac/purple

Question 11

What colour change does Benedicts solution undergo?

Answer 11

Blue→brick red (orange/green if less sugar is present)

Question 11

What chemical is used to test for sugars

Answer 11

Benedicts solution

Question 12

How do you test for simple sugars?

Answer 12

Add Benedicts solution and heat up in water bath around 75°c for 5 min6

Question 13

What chemical do you use to test for lipids

Answer 13

Ethanol & water

Question 14

What colour change does the lipid test undergo

Answer 14

Clear → cloudy/milky

Question 15

How do you test for lipids

Answer 15

Add water to ethanol and shake

Question 16

What side of the heart carries oxygenated blood?

Answer 16

Left

Question 17

Where does the pulmonary vein come from

Answer 17

The lungs (oxygenated)

Question 18

Where does the vena cava come from

Answer 18

Blood from the rest of the body (deoxygenated)

Question 19

Where does the aorta take blood to?

Answer 19

The rest of the body (oxygenated)

Question 20

What is the independent variable

Answer 20

The variable that is altered during the experiment

Question 21

What is the dependent variable

Answer 21

The variable being tested or measured

Question 22

what is the control variable

Answer 22

The variable that is kept the same during the experiment

Question 23

Where does the pulmonary artery take blood to

Answer 23

To the lungs (deoxygenated)

Question 23

What do capillaries do

Answer 23

Transport blood and nutrients to the cells in your organs

Question 23

What do the coronary arteries do

Answer 23

Supply blood to the heart

Question 23

Artery characteristics

Answer 23

Thick walls to handle high blood pressure

Question 23

Where do arteries carry blood

Answer 23

Away from the heart (oxygenated)

Question 23

Where to veins carry blood to

Answer 23

To the heart (deoxygenated)

Question 24

What goes in through the stomata

Answer 24

Carbon dioxide

Question 25

What goes out of the stomata

Answer 25

Oxygen

Question 26

Where are stomata usually found

Answer 26

On the bottom of the leaf to reduce water loss

Question 27

Why are the leaves thin

Answer 27

So the CO2 doesn't have far to travel

Question 28

What are palisade cells full of

Answer 28

Chloroplasts

Question 29

What is the upper epidermis

Answer 29

A transparent layer on the leaf so sunlight can pass through to the palisade cells for photosynthesis

Question 30

Why do the guard cells become turgid

Answer 30

To open the stomata and water vapour is lost

Question 30

What happens when the guard cells become flaccid

Answer 30

The guard cells close due to the loss of water vapour through osmosis and they close to conserve the water vapour

Question 31

Why are guard cells usually found on the bottom of the leaf

Answer 31

They are light sensitive and it is cooler on the bottom which helps reduce water loss/evaporation

Question 32

What is translocation

Answer 32

The transport of nutrients and sugars through the phloem of a plant

Question 33

What is the xylem

Answer 33

A thing that transports water and nutrients from the roots to the stem and leaves idk

Question 33

What is transpiration

Answer 33

The movement of water through a plant

Question 34

What is the phloem

Answer 34

Moves food that the plant has produced from photosynthesis

Question 35

Vein characteristics

Answer 35

They have valves

Question 36

Does diffusion/osmosis require energy

Answer 36

No

Question 37

Do all particles go through the process of osmosis?

Answer 37

No, only some as it is a partially permeable membrane