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MICROBIOLOGY > CH 11 > Flashcards

CH 11 Flashcards

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Biology 101 flashcards
1
Q

7 general characteristics of Algae

  • domain
  • uni or multi
  • cell wall
  • pathogenicity
  • nutrition
  • motility
  • type of pigment it contains
A
  1. eukaryotic
  2. unicellular, multicellular, colonial
  3. thin and rigid cell wall
  4. most are non-pathogenic
  5. photosynthetic
  6. contains photosynthetic pigments
  7. motile by flagella and substratum
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2
Q

Habitat of algae (3)

A
  1. light and moisture
  2. freshwater, saltwater, and soil
  3. Littoral zone (shore areas)
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3
Q

Composition of cell wall (8)

A

cellulose
mannan
galactans
alginic acid
chitin
xylan
CaCO3
flucoidin

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4
Q

a unicellular algae widely used as a model for different algae functions

A

Chlamydomonas

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5
Q

4 characteristics that makes CHLAMYDOMONAS a good algae model

A

photosynthesis
flagellar movement
phototaxis
cell-cell communication

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6
Q

Most known organelle found in algae

A

plastids

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7
Q

3 main characteristics of plastids

and which of the two are only present in SOME algae

A

2 & #3

  1. PHOTOSYNTHETIC PIGMENTS
  2. Pyrenoids (CO2 fixation and starch formation)
  3. Eyespot/Stigma (photoaxis)
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8
Q

3 pigments found in algae

A
  1. chlorophylls
  2. carotenoids
  3. phycobilins
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9
Q

2 examples of carotenoids

A

carotenes and xanthophylls

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10
Q

4 examples of phycobilins

A
  1. Phycoerythrobilin (red)
  2. Phycourobilin (orange)
  3. Phycoviolobilin (purple)
  4. Phycocyanobilin (blue)
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11
Q

Other term for “Phycocyanobilin”

A

Phycobiliverdin

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12
Q

2 types of asexual reproduction

A

Binary Fission and Fragmentation

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13
Q

3 types of sexual reproduction

A

CONJUGATION

  1. isogamy
  2. heterogamy
  3. oogamy
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14
Q

TYPES OF SEXUAL REPRODUCTION

different genotypes

A

isogamy

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15
Q

TYPES OF SEXUAL REPRODUCTION

different size

A

heterogamy

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16
Q

TYPES OF SEXUAL REPRODUCTION

different motility

A

oogamy

17
Q

How many flagella do chlamydomonas have

A

2

18
Q

Is chlamydomonas haploid or diploid

A

haploid

19
Q

CHLAMYDOMONAS - Asexual Stage (3 phases)

A
  1. Adult undergoes MITOSIS to produce zoospores
  2. Zoospores are still enclosed in a sac called ZOOSPORANGIUM
  3. The sac bursts to release the zoospores
20
Q

CHLAMYDOMONAS - Sexual Stage (5 phases)

A
  1. Adult undergoes MITOSIS to produce zoospores in zoosporangium
  2. Zoosporangium forms a ISOGAMY GAMETE PAIRING w/:
    + Gamete
    - Gamete
  3. The two gametes fuses to form a ZYGOTE through FERTILIZATION
  4. Zygote forms ZYGOSPORE
  5. Zygospore undergoes MEIOSIS to form 4 haploid spores
21
Q

What type of reproduction specifically do spirogyra undergo?

A

conjugation

22
Q

2 examples of algae that are primary producers

A

phytoplankton
seaweed

23
Q

3 examples of food based on ALGAE

A

Caulerpa
Palmaria palmata
Porphyra

24
Q

Use of algae in microbiology setting

A

Agar

25
Q

What is Kingdom Archaeplastida

A

A supergroup of protists that includes land plants and green algae

26
Q

RED ALGAE
- other term
- 3 key genera
- habitat (3)
- pigments (5)
- multicellular or unicellular
- motility
- cell wall composition (3)
- mode of reproduction (2)

A
  • Rhodophytes
  • Polysiphonia, Cyanidium, Galdiera
  • salt water, fresh water, and terrestrial
  • phycoerythrin, chlorophyll a, phycobiliproteins, phycocyanin, allophycocyanin
  • multicellular
  • non-motile
  • cellulose, pectin, carrageenan
  • asexual spores, sexual gametes
27
Q

Green Algae
- other term
- 2 key genera
- habitat (4)
- pigments (4)
- multicellular or unicellular
- storage product (1)
- cell wall composition (2)
- mode of reproduction (3)
- motility

A
  • Chlorophytes
  • Chlamydomonas and Volvox
  • fresh water, salt water, soil, tree barks (lichens)
  • cholorophyll a and b, carotenes, xantophylls
  • unicellular, filamentous, colonial, multicellular
  • starch-glucose polymer
  • cellulose and pectin
  • Asexual (fission, spores) & Sexual
  • non motile BUT reproductive structures are motile
28
Q

What type of GREEN ALGAE is the only motile organism?

A

Chlorococcales

MICROBIOLOGY (30 decks)

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