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Bio 20 > Photosynthesis > Flashcards

Photosynthesis Flashcards

1
Q

The light-dependent reaction associated with photosynthesis occurs in the…..?

A

chloroplasts

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2
Q

The light reactions occur in

the_________,while the calvin cycle occurs in the_________.

A

Thylakiod membrane, stroma

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3
Q

What are produced during the calvin cycle?

A

Co2, glucose

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4
Q

What are the 2 photosystems called?

A

Photosystems 1 and 2

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5
Q

Photolysis refers to the____________.?

A

Splitting of water

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6
Q

What is ATP energy?

A

ATP(adenosine triphosphate) is a molecule that stores and transfers energy within the cell. also made of sugar. Consisting of (5 carbon ribose), niteogen base, (adenine) and 3 phosphate molecules.

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7
Q

Where does fermentation occur?

A

cytoplasm of the cell

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8
Q

The stacks of thylakoid disks inside a chloroplast are called___________?

A

grana

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9
Q

Photosynthesis is most effective in which colors of visible light spectrum?

A

blue and red

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10
Q

The light dependent reactions of photosynthesis occur without_________?

A

carbon dioxide

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11
Q

Electrons are transferred from weak to stronger acceptors. An example of a strong electron acceptor?

A

Oxygen

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12
Q

The liquid inside the thylakoid disk is the_________?

A

Lumen

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13
Q

The process in which ADP becomes ATP is known as…………….?

A

phosphorylation

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14
Q

The end products of photosynthesis is___________?

A

oxygen, water, and sugar

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15
Q

The correct order of steps in cellular respiration is…

  1. Hydrogen/electron Transport system
  2. Kreb cycle
  3. carbon fixation
  4. Acetyl CoA formation
  5. glycolysis
A

5412

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16
Q

The correct order of the steps of photosynthesis is…

1) NADPH is formed 2) carbon is fixed 3) water is split 4) oxygen is released

A

3412

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17
Q

Which two compounds produced during the Krebs cycle donate electrons to the electron transport chain?

A

NADH and FADH2

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18
Q

Which of the following organelles is the site of cellular respiration?

A

The mitochondrion

19
Q

Pyruvate oxidation is a transition reaction that directly links which of the following two metabolic pathways?

A

Glycolysis and the Krebs cycle

20
Q

Which of the following steps occurs in both aerobic and anaerobic respiration?

A

Glycolysis

21
Q

Photosystems are located in which of the following cellular structures?

A

thylakoids

22
Q

Which colors of visible light does chlorophyll absorb the most?

A

blue and red

23
Q

Operation of the Calvin-Benson cycle requires a constant supply of………?

A

C, H, O, and energy

24
Q

Which of the following processes occurs during non-cyclic photophosphorylation and releases oxygen?

A

Photolysis

25
Q

What is outpart of the thylakiod membrane?

A

Outermembrane

26
Q

What are the role of the photosystems?

A

To produce evergy in the stroma which will be later used to manufacture surgers.

27
Q

Light independent reactions are also referred to as_________________ ?

A

Dark reactions or the calvin cycle

28
Q

What does the Calvin cycle convert ?

A

Csrbon dioxide into a 3-carbon suger molecule that is used to make glucose for plants.

29
Q

The__________and______________required in the calvin cycle are provided by light reactions of photosynthesis.

A

ATP and NADPH

30
Q

Explain the steps of the Calvin cycle….

A

The initial step is to attach CO2 to a sugar called ribulose bisphosphate (RuBP), which is done by an enzyme called RuBisCO. This results in two molecules of 3-phosphoglycerate (3PGA), which receive a phosphate from ATP and electrons from NADPH (provided by the light reactions) to form glyceraldehyde-3-phosphate (G3P or PGAL). Some G3P is then used to produce carbohydrates such as glucose, which are important for plant growth. The rest of the G3P is converted back to RuBP by ATP so it can accept more carbon dioxide.

31
Q

Cyclic photophosphorylation also occurs during__________?

A

light reactions, and produces ATP (through the action of chemiosmosis), but not NADPH.

32
Q

In photosynthesis, energy from the sun is required to form….

A

ATP and split water.

33
Q

The light-independent reactions of photosynthesis require the presence of…

A

carbon dioxide and NADPH

34
Q

The energy that is contained in a grapefruit originates from…

A

ATP

35
Q

The molecule that is recycled in the light-independent reactions is…

A

ribulose bisphosphate

36
Q

Which of the following pigments is most important in the process of Photosynthesis?

A

Chlorophyll a

37
Q

In which part of the plant does Photosynthesis mostly occur?

A

leaves

38
Q

Light trapping units composed of pigments within the thylakoid membranes

A

Photosystems

39
Q

The least and most soluble pigments are….

A

chlorophyll B

40
Q

The conversion of CO2 and H2O into organic compounds using energy from light is called?

A

Photosynthesis

41
Q

During which of the following phases of cellular respiration does substrate-level phosphorylation take
place?

A

glycolysis

42
Q

The end products of glycolysis should include…..

A

acetyl CoA

43
Q

When an organism such as a yeast lives by fermentation, it converts the pyruvate from glycolysis into a different compound, such as alcohol. Why doesn’t it secrete the pyruvate directly?

A

The conversion is needed to regenerate the molecules needed for glycolysis.

44
Q

The oxygen released into the air as a product of photosynthesis comes from…

A

water

Bio 20 (8 decks)

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