photosynthesis

Question 1

what is the chlorophyll

Answer 1

A green coloured chemical in chloroplasts that is responsible for absorbing light energy during photosynthesis.

Question 2

what is a green coloured chemical in chloroplasts that is responsible for absorbing light energy during photosynthesis.

Answer 2

the chlorophyll

Question 3

what is the chloroplasts

Answer 3

A structure in the cytoplasm of plant cells which contains chlorophyll and carries out photosynthesis

Question 4

what is a structure in the cytoplasm of plant cells which contains chlorophyll and carries out photosynthesis

Answer 4

the chloroplasts

Question 5

what is the compensation point

Answer 5

When the environmental conditions plant is growing a in (usually the levels of light) produce rates of photosynthesis and respiration that are equal i. e. there is no net gas exchange.

Question 6

what happens When the environmental conditions plant is growing a in (usually the levels of light) produce rates of photosynthesis and respiration that are equal i. e. there is no net gas exchange.

Answer 6

the compensation point

Question 7

what is the cuticle

Answer 7

The waxy layer on the outside surface of a plant epidermis that allows light through and reduces water loss.

Question 8

what is the waxy layer on the outside surface of light through and reduces water loss. a plant epidermis that allows

Answer 8

the cuticle

Question 9

what does it mean by de-starch

Answer 9

The procedure that removes starch from plant leaves

Question 10

what is the procedure that removes starch from plant leaves

Answer 10

de-starch

Question 11

what is the epidemies

Answer 11

An outer layer of cells

Question 12

what is an outer layer of cells

Answer 12

the epidemies

Question 13

what is gas exchange

Answer 13

The movement of gases between an organism and its surroundings.

Question 14

what is the movement of gases between an organism and its surroundings.

Answer 14

gas exchange

Question 15

what is the limiting factor

Answer 15

Any factor which is at a level less than its optimum which slows or limits
a process, e.g. photosynthesis.

Question 16

what do you call when any factor which is at a level less than its optimum which slows or limits
a process, e.g. photosynthesis.

Answer 16

the limiting factor

Question 17

what is the palisade

Answer 17

The upper of the two layers of mesophyll cells in the centre of a leaf. The cells are closely packed end on to the upper surface and contain many chloroplasts. They are the main site of photosynthesis.

Question 18

what is the upper of the two layers of mesophyll cells in the centre of a leaf. The cells are closely packed end on to the upper surface and contain many chloroplasts. They are the main site of photosynthesis.

Answer 18

the palisade

Question 19

what is photosynthesis

Answer 19

The chemical process in green plants which uses light energy to convert carbon dioxide and water into sugars and oxygen.

Question 20

what is the chemical process in green plants which uses light energy to convert carbon dioxide and water into sugars and oxygen.

Answer 20

photosynthesis

Question 21

what is the spongy mesophyll

Answer 21

The lower of the two layers of mesophyll cells in the centre of a leaf. The cells are loosely arranged with air spaces in between them. They are the main site of gas exchange,

Question 22

what is the lower of the two layers of mesophyll cells in the centre of a leaf. The cells are loosely arranged with air spaces in between them. They are the main site of gas exchange,

Answer 22

the spongy mesophyll

Question 23

what is a stoma

Answer 23

The small pores in the surface of plant leaves.

Question 24

what is the small pores in the surface of plant leaves.

Answer 24

a stoma

Question 25

what is the word equation for photosynthesis

Answer 25

carbon dioxide + water =sunlight= glucose + oxygen

Question 26

what is the chemical balanced equation for photosynthesis

Answer 26

6Co2 + 6H2O = C6H12O6 +6O2

Question 27

what 2 chemicals do plants take in

Answer 27

carbon dioxide and water

Question 28

what gas does plants release

Answer 28

oxygen

Question 29

How do you De-starch a Plant

Answer 29

Place it in a dark cupboard for 48 hours

Question 30

Chemical Used for starch test

Answer 30

Iodine Solution

Question 31

What type of Reaction is Photosynthesis

Answer 31

Endothermic

Question 32

What Colour will Hydrogen Carbonate Indicator turn if there is more CO2 and Why?

Answer 32

Yellow Rate of Respiration>Rate of Photosynthesis

Question 33

What Colour will Hydrogen Carbonate Indicator turn if there is less CO2 and Why?

Answer 33

Purple Rate of Respiration

Question 34

What does it mean if Hydrogen Carbonate Indicator turns Red

Answer 34

Rate of Respiration=Rate of Photosynthesis

Question 35

How is Leaf Adapted for Gas Exchange?

Answer 35

1)Stomata=Allows gases to enter and leave the leaf 2)Air Space= allows gases such as CO2 and O2 to diffuse

Question 36

How is Leaf Adapted for Light Absorption?

Answer 36

1) The cuticle is transparent which allows light to pass through 2)Has chlorophyll which absorbs/traps sunlight

Question 37

What Chemical Absorbs Carbon Dioxide from the Air?

Answer 37

Sodium Hydroxide

Question 38

What is it called when the Rate of Respiration=Rate of Photosynthesis

Answer 38

Compensation point

Question 39

explain the starch test for a plant leaf

Answer 39

1. Remove a leaf from a plant and place in boiling water for at least 30 seconds. 2. The leaf is then placed in boiling ethanol. 3. The leaf should then be dipped in water again. 4.The leaf is then spread out on a white tile or petri dish and iodine is added to 5. * If starch is present the yellow-brown iodine will turn the starch blue-black.

Question 40

what is the point of step 1 by the process to Remove a leaf from a plant and place in boiling water for at least 30 seconds.

Answer 40

soften the leaf and breaks down the membranes

Question 41

what is the point of step 2 of by placing the leaf in boiling ethanol

Answer 41

to remove the green chlorophyll - allows us to see any colour change of iodine

Question 42

what is the point of step 3 by dipping the leaf back into water again

Answer 42

to remove the ethanol

Question 43

what is the point of step 4 when the leaf is spread out on a white tile or petri dish and iodine is added to

Answer 43

iodine is an indicator

Question 44

what is the point of step 5 of checking the colour

Answer 44

if the iodine shows up as blue-black then there is starch or the leaf is photosynthesising

Question 45

what is sugars used for in a plant

Answer 45

it is used to make new cell wall, respiration, used to help the plant make proteins and fats and it is used to turn back into starch to be stored

Question 46

how can you measure the rate of photosynthesis

Answer 46

Pondweed (Elodea) is frequently used to compare photosynthesis rates in different light

Question 47

what is the key points of measuring Pondweed

Answer 47

Key points: measuring the rate of Photosynthesis by Counting the bubbles Per minute. You can change light intensitiy and measure its effect by moving the lamp Waiting are recovering.

Question 48

why is counting all the bubbles in a pondweed not a good way of measuring oxygen released

Answer 48

not all the bubbles may be pure it may also be carbon dioxide and it may be different sizes

Question 49

what is the lamp for

Answer 49

the lamp is there for the light not for the heat

Question 50

why id extra carbon dioxide added to a green house

Answer 50

maximum PSN, MAX growth

Question 51

why is carbon dioxide closed of 1 hour before night time

Answer 51

is there is no sun extra carbon dioxide won't help it photosynthesis and be a waste of money

Question 52

why is the windows opened in a green house

Answer 52

to help with ventilation

Question 53

word equation for respiration

Answer 53

glucose + oxygen = carbon dioxide + water