Lecture 9: Photosynthesis

Question 1

chloroplasts

Answer 1

the site of photosynthesis

Question 2

Chloroplast structure:

Answer 2

outer membrane
inner membrane 
geranium - thylakoid (thylakoid space)
stroma
DNA
ribosomes

Question 3

Chloroplast structure, three membranes:

Answer 3

outer membrane
inner membrane
thylakoid

Question 4

Three compartments:

Answer 4

inter membrane
stroma
thylakoid space

Question 5

Thylakoid

Answer 5

where light reactions take place

Question 6

Stroma

Answer 6

where carbon fixation occurs

Question 7

Photosystem (location)

Answer 7

found in thylakoid membrane

Question 8

photosystems are…

Answer 8

protein complexes that contain chlorophyll

Question 9

chlorophyll

Answer 9

absorbs light energy that produces high energy electrons

Question 10

High energy electrons…

Answer 10

travel through the photosynthetic electron transport chain

Question 11

Photosynthetic electron transport chain:

1.

Answer 11

light energy comes into photosystem II and causes two electrons from chlorophyll to leave photosystem II

Question 12

Photosynthetic electron transport chain:

2.

Answer 12

electrons move through cytochrome complex loosing some energy, which is used to pump protons through membrane

Question 13

Photosynthetic electron transport chain:

3.

Answer 13

electrons go through photosystem I, which absorbs energy that is transferred to the electrons making them high energy electron carrying molecules

Question 14

Photosynthetic electron transport chain:

4.

Answer 14

they then leave going to a high energy electron carrying molecule
NADP + H+ = NADPH

Question 15

Photosynthetic electron transport chain:

5.

Answer 15

photosystem II can draw water, and takes electrons which produces oxygen and protons

Question 16

Photosynthetic electron transport chain:

6.

Answer 16

ATP synthase is a protein through which protons move down the concentration gradient

Question 17

Photosynthetic electron transport chain:

7.

Answer 17

as protons move through ATP synthase ADP + Pi makes ATP

Question 18

ATP and NADPH produced in light reactions are used…

Answer 18

to fix carbon dioxide and produce carbohydrate in the Calvin cycle

Question 19

Calvin cycle:

fixation -

Answer 19

5 carbon molecules + carbon dioxide converted into different 3 carbon molecules

Question 20

Calvin cycle:

reduction -

Answer 20

3 carbon molecules converted into different molecules 3 carbon sugars
ATP/NADPH used to make high energy 3 carbon sugar,, one 3 carbon sugar is released

Question 21

Calvin cycle

regeneration-

Answer 21

converting the 3 carbon molecule back into the 5 carbon molecule

Question 22

Photosynthesis

inputs/outputs

Answer 22

inputs - light, water, carbon

outputs - glucose, oxygen

Question 23

glucose generation in plants/animals

Answer 23

plants produce their own - photosynthesis

animals - external source

Question 24

ATP is generated

Answer 24

in both respiration/photosynthesis

Question 25

ATP synthase

Answer 25

produces ATP

Question 26

ATP synthase require

Answer 26

a proton gradient in chloroplasts/mitochondrion

Question 27

Mitochondrion/chloroplasts content/ability:

Answer 27

DNA
ribosomes
inner/outer membrane
ability to make some proteins