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BIOL 1105 > 10: Photosynthesis > Flashcards

10: Photosynthesis Flashcards

Module 2, Lesson 4

1
Q

Almost all life on Earth ultimately depends on…

A

Energy from the Sun

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2
Q

A process that produces oxygen is termed…

A

Oxygenic

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3
Q

List three groups of organisms that can perform photosynthesis.

A
  1. Cyanobacteria
  2. 7 types of algae
  3. Most plants
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4
Q

During photosynthesis…

A

Carbon dioxide, water, and sunlight are converted into glucose, water, and molecular oxygen.

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5
Q

The process of photosynthesis is very similar to ____, but in reverse.

A

Aerobic respiration

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6
Q

The oxidation of water and reduction of carbon dioxide is driven by…

A

The energy from the Sun

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7
Q

The metabolic processes in chloroplasts and mitochondria form a(n)…

A

Energy cycle

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8
Q

Photosynthesis uses the products of ____ as starting substrates.

A

Respiration

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9
Q

Aerobic respiration uses the products of ____ as starting substrates.

A

Photosynthesis

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10
Q

In plants, photosynthesis occurs in the…

A

Chloroplasts

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11
Q

In leaves, cells called ____ contain a large number of chloroplasts.

A

Mesophylls

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12
Q

Chloroplasts have a ____ membrane.

A

Triple

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13
Q

The inner membrane of a chloroplasts interact with…

A

The stroma
(an interior compartment)

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14
Q

The stroma contains…

A

Thylakoid discs

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15
Q

Thylakoid discs are stacked in columns called…

A

Grana

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16
Q

The thylakoid disks are separated from the stroma by the…

A

Thylakoid membrane

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17
Q

The area enclosed by the thylakoid membrane is called the…

A

Thylakoid space or lumen

18
Q

The thylakoid space contains ____ and ____.

A

Photosynthetic pigments and protein complexes

19
Q

List the two main stages of photosynthesis.

A
  1. Light-dependent reactions
  2. Light-independent reactions
20
Q

Light-dependent reactions occur in the…

A

Thylakoids

21
Q

Processes that occur during the light-dependent phase include…

(four)

A
  1. Capturing of solar energy
  2. Generation of ATP
  3. Reduction of NADP+ to NADPH
  4. Production of oxygen from water
22
Q

Light-independent reactions take place in the…

A

Stroma

23
Q

Processes that occur during the light-independent phase include…

(three)

A
  1. Carbon fixation
  2. Calvin cycle
  3. Production of organic molecules
24
Q

____ are molecules that absorb visible light photons.

A

Pigments

25
Q

A ____ is a packet of light that acts like a discrete bundle of energy.

A

Photon

26
Q

A photon’s ____ is inversely proportional to its ____.

A

Energy ; wavelength

27
Q

The ____ describes the process by which photons can remove electrons from molecules.

A

Photoelectric effect

28
Q

What happens in a molecule if an incoming photon has precisely the right energy?

A
  1. The photon is absorbed
  2. Its energy is transfered to an electron
  3. The electron moves to a higher energy level
29
Q

____ electrons are those that have received energy from a photon.

A

Excited

30
Q

During photosynthesis, the pigments in a chloroplast act as…

A

Photoelectric devices

31
Q

Each pigment has a characteristic…

A

Absorption spectra

(can only absorb a specific wavelength of light)

32
Q

List the three main pigments found in chloroplasts.

A
  1. Chlorophyll A
  2. Chlorophyll B
  3. Carotenoids
33
Q

The main pigment in plants is…

A

Chlorophyll A

34
Q

Which wavelengths (colors) of light can chlorophyll A absorb?

A

Violet-blue and red

35
Q

True or false:

Chlorophyll A is the only pigment that can directly convert light into chemical energy.

A

True

36
Q

Chlorophyll B and carotenoids are considered…

A

Accessory pigments

37
Q

Which wavelengths (colors) of light can chlorophyll B absorb?

A

Blue and red-orange

38
Q

Which wavelengths (colors) of light can carotenoids absorb?

A

Blue and blue-green

39
Q

True or false:

Many plants appear green because they absorb green light.

A

False

Plants appear green because they reflect green light.

40
Q

Cells that contain carotenoids will often appear…

A

Orange

41
Q

In addition to their role in photosynthesis, carotenoids also function as…

A

Anti-oxidants

42
Q
A

BIOL 1105 (10 decks)

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