Photosynthesis quiz

Question 1

Photosynthesis equation

Answer 1

6CO2 + 6H20 + light —> C6H12012 + 602

Question 2

autotrophs

Answer 2

an organism that makes its OWN food

Question 3

heterotrophs

Answer 3

consumers- must eat organic material

Question 4

what organelle does photosynthesis occur in?

Answer 4

chloroplasts

Question 5

what part of the plant is the major site for photosynth?

Answer 5

leaves - they are greenest part of the plant meaning they contain the most chlorophyll which is in chloroplasts

Question 6

are chloroplasts double-membraned?

Answer 6

yes!

Question 7

thylakoids

Answer 7

discs that contain chlorophyll - are the site of light reactions-

Question 8

stack of thylakoids…

Answer 8

grana/granum

Question 9

stroma

Answer 9

liquid inside a chloroplast - site of calvin cycle

Question 10

names of 2nd part of photosynthesis

Answer 10

calvin cycle, dark reactions, light-independent reactions

Question 11

chlorophyll

Answer 11

green pigment in thylakoids that captures light

Question 12

palisade mesophyll

Answer 12

UPPER part of a leaf; majority of photosynth. happens here

Question 13

stomata

Answer 13

opening in leaf that allows CO2 in and O2 out (also water)

Question 14

when does a stomata close?

Answer 14

in high temperatures to avoid losing water

Question 15

what parts of the photosynthesis equation are used in dark reactions?

Answer 15

6CO2 and C6H12O6 (glucose)

Question 16

what parts of the photosynth. equation are used in the light reactions?

Answer 16

6H20 and 6O2

Question 17

Can humans see absorbed light?

Answer 17

No- we can only see reflected light

Question 18

how many chloroplast pigments are there?

Answer 18

4

Question 19

chlorophyll a

Answer 19

bright green - absorbs blue and red light and participates DIRECTLY in photosynth.

Question 20

chlorophyll b

Answer 20

dark green - absorbs blue and orange light and increases the range of light that can be absorbed

Question 21

carotenoids

Answer 21

yellow/orange - absorbs blue-green light and dissipates excess light to protect chlorophyll a

Question 22

anthocyanin

Answer 22

red, pink, blue, purple- absorbs blue-green light, absorbs light, and attracts pollinators

Question 23

photon

Answer 23

fixed quantity of light energy that excites electrons in light reactions

Question 24

photosystems

Answer 24

cluster of pigment molecules that attract photons

Question 25

what color do leaves absorb the most?

Answer 25

red and blue

Question 26

light reactions

Answer 26

absorbs solar energy to be converted to ATP and NADPH and O2 as a byproduct

Question 27

light reaction step 1

Answer 27

protons hit chlorophyll in PS2 –> excite electrons

Question 28

light reactions step 2

Answer 28

electrons travel down electron transport chain

Question 29

light reactions step 3

Answer 29

PS2 splits water to replace electrons (H+ and oxygen)

Question 30

light reactions step 4

Answer 30

4. electron’s energy is used to pump H+ to thylakoid space

Question 31

light reactions step 5

Answer 31

H+ move to stroma (high to low) via ATP synthase

Question 32

light reactions step 6

Answer 32

ATP synth. rotates and produces ATP

Question 33

light reactions step 7

Answer 33

PS1 excites electrons

Question 34

light reactions step 8

Answer 34

electrons used to reduce NADP+ to NADPH (an electron carrier)

Question 35

Calvin cycle- Carbon Fixation

Answer 35

RuBis Co (an enzyme) attaches the 5-carbon molecule RUBP to a one-carbon molecule CO2 —> forms 2 molecules of 3-phosphoglycerate

Question 36

Calvin cycle - reduction

Answer 36

each 3-phosphoglycerate is reduced to form G3P (uses energy from ATP and electrons from NADPH)

Question 37

Phase 3 - regeneration

Answer 37

one molecule of G3P will leave to form sugars and the rest will be recycled to form RUBP

Question 38

photosystem 2

Answer 38

water-splitting

Question 39

photosystem 1

Answer 39

NADPH producing