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Science > Photosynthesis > Flashcards

Photosynthesis Flashcards

0
Q

What exits the leaf?

A

Gaseous water and oxygen

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1
Q

What enters the leaf?

A

Sunlight, liquid water, and carbon dioxide

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2
Q

List the layers of the vein of a leaf

A 
Cuticle
Upper Epidermis
Palisade mesophyll
Spongy mesophyll
Lower epidermis
Stoma
Cuticle
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3
Q

What is xylem? What is phloem?

A

Xylem carries water and minerals up from the roots

Phloem carries the sugars away from the leaf

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4
Q

What is the purpose of a cuticle?

A

It prevents excess water loss, a waxy coating

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5
Q

Purpose of the upper epidermis?

A

Protection

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6
Q

Purpose of the palisade mesophyll?

A

Where photosynthesis occurs, where chloroplasts are

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7
Q

Purpose of the spongy mesophyll?

A

Exchange of gas

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8
Q

Purpose of lower epidermis?

A

Allows gas to come in and out of the lead with the guard cell

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9
Q

Purpose of the stoma/stomata?

A

Opens to let water in

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10
Q

How do the reactants enter the leaf?

A

CO2- stoma
Water- veins
Sunlight-

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11
Q

What is thylakoid?

A

Site of light dependent reaction, contains chlorophyll and is found in chloroplast
A single disk

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12
Q

What is grannam?

A

A single stack of thylakoids

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13
Q

What is granna

A

Multiple stacks of thylakoids

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14
Q

What is stroma?

A

Sight of Calvin cycle, space throughout the chloroplast

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15
Q

Steps of light dependent reaction

A

1- photosystem II
2- ETC
3- photosystem I
4- ATP Synthase

16
Q

What occurs in photosystem II

A

Excited electrons from oxidation of water moving through the electron transport chain provide the free energy needed to pump hydrogen ions into the inner thylakoid

17
Q

What occurs in photosystem I

A

Excited electrons leave chlorophyll and reduce NADP+ into NADPH

18
Q

What occurs in the ATP Synthase

A

Hydrogen ions flowing out of the thylakoid via a protein chain provide the free energy needed to concert ADP into ATP

19
Q

What does the ETC do?

A

Uses the energy from excited electrons to move hydrogen ions against the concentration gradient across the thylakoid membrane, producing a high concentration of it inside the thylakoid membrane

20
Q

Three phases of the Calvin Cycle?

A

Carbon fixation
Reduction
Regeneration

21
Q

What occurs in cabin fixation?

A

The 3 RuBP (5 carbon atoms) catch the 3 CO2 and forms 6 PGA

22
Q

What occurs in reduction?

A

Energy is used, and the PGA turns into 6 PGAL (3 carbon atoms each)

23
Q

What occurs in regeneration?

A

One PGAL is given off, which is half a glucose molecule (2 turns) and 5 continue on to go through the Calvin Cycle again

24
Q

Energy flow in photosynthesis

A

Sunlight— electrons — ATP — glucose

25
Q

Equation

A

6CO2 + 6H2O +energy — C6H12O6 + 6O2

26
Q

Cyclic pathways in light dependent reaction

A

Only makes ATP no NADPH, only utilizing photosystem I, occurs when there is enough NADPH and only ATP is needed

Science (17 decks)

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