Photosynthesis

Question 1

equation

Answer 1

CO2 + oxygen===== glucose + oxygen

Question 2

photosynthesis

Answer 2

happens when light energy is absorbed by green pigment chlorophyll found in chloroplast
the reaction of photosynthesis is controlled by enzymes. substance produced by an organism and acts as a catalyst

Question 3

light intensity for photosynthesis test

Answer 3

look for stream for bubbles coming from cut end of pondweed
count bubbles produced in a minute.
repeat twice and calculate mean
change distance between lamp and plant
leave for 2 mins for pondweed to settle and count bubbles again in a minute and repeat and calculate

Question 4

glucose assimilation used for

Answer 4

release energy during respiration
makes cellulose. which used to build cell walls
makes proteins

Question 5

testing lead for starch

Answer 5

remove green leaf that been exposed to sunlight for few hours
half fill 250 beaker with water. heat until boils and keep at boiling point
forceps to place leaf in boiling water. boil for 2 mins
turn bunsen burner off
placed boiled lead in boiling tube with ethanol
placed tube into hot water and hear for 10 mins or until lead decolourizes
remove lead and wash with fine cold water
white tile
add iodine solution
starch present blue black