Cycling of P&S, Redox reactions, Electron transport chains, Introduction to photosynthesis

Question 1

What is Phosphorous important for?

Answer 1

Nucleotides (ATP), Nucleic Acid polymers (DNA/RNA), Phospholipids (Plasma Membrane)

Question 2

What is the cycle of phosphorous?

Answer 2

1. Plants incorporate P from sediment
2. Animals eat plants
3. Plants/animals die and decomposers return P to
   sediment
4. Plants incorporate it again & the cycle begins again

Question 3

What is Sulfur important for?

Answer 3

Found in certain amino acids (proteins), critical for protein folding

Question 4

What is the cycle of sulfur?

Answer 4

1. Plants incorporate S from sediment
2. Animals eat plants
3. Plants/animals die and decomposers return S to the
   sediment
4. Plants incorporate it again & the cycle begins again

Question 5

When do Redox Reactions occur?

Answer 5

when molecules gain or lose electrons

Question 6

OIL RIG

Answer 6

Oxidation Is Loss (The loss of electrons, Reduction Is Gain (The gain of electrons)

Question 7

Reduction/Oxidation rxns are _______.

Answer 7

coupled

Question 8

Electron Transport Chain (ETC)

Answer 8

A chain of redox reactions results in a “flow” of
electrons

Question 9

Electron carriers

Answer 9

Accept electrons (become reduced) and donate electrons (become oxidized)

Question 10

irst EC in an ETC has the ________ affinity for e- ’s

Answer 10

lowest

Question 11

The last EC in an ETC has the ______ affinity for e- ’s

Answer 11

most

Question 12

What powers the production of glucose?

Answer 12

Light Energy

Question 13

What is the efficiency of the energy transfer of light energy to glucose?

Answer 13

30%

Question 14

Thylakoid membranes

Answer 14

contain the pigments (chlorophylls) that capture light energy

Question 15

Stroma

Answer 15

is where glucose is made

Question 16

Light Reactions (light dependent rxns)

Answer 16

Occur at the thylakoid membrane

Question 17

What do light reactions require?

Answer 17

Light, H2O

Question 18

What do light reactions produce?

Answer 18

ATP, NADPH, O2

Question 19

Dark Reaction (light independent rxns, also called the
Benson Cycle)

Answer 19

Occur in the storma

Question 20

What do dark reactions require?

Answer 20

CO2, ATP, NADPH

Question 21

What do dark reactions produce?

Answer 21

Glucose, ATP, NADP+