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Objective Questions

Latest OSSC Laboratory Assistant Exam Question (Objective Questions), MCQ in English

Subjects : Concerned Subject

Question Bank OSSC Laboratory Assistant Exam (Botany) - English
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Concerned Subject

Question 1Single Answer
The study of algae is called:
  1. A
    Phycology
  2. B
    Mycology
  3. C
    Bryology
  4. D
    Palynology
Question 2Single Answer
The plant body of most algae is called:
  1. A
    Rhizome
  2. B
    Sporophyte
  3. C
    Corm
  4. D
    Thallus
Question 3Single Answer
Algae are predominantly:
  1. A
    Heterotrophic
  2. B
    Parasitic
  3. C
    Photosynthetic
  4. D
    Saprophytic
Question 4Single Answer
The major photosynthetic pigment common to all algae is:
  1. A
    Chlorophyll a
  2. B
    Chlorophyll b
  3. C
    Chlorophyll c
  4. D
    Chlorophyll d
Question 5Single Answer
Chlamydomonas is a:
  1. A
    Unicellular motile alga
  2. B
    Colonial alga
  3. C
    Filamentous fungus
  4. D
    Bryophyte
Question 6Single Answer
Volvox is an example of a:
  1. A
    Moss
  2. B
    Fungus
  3. C
    Colonial alga
  4. D
    Fern
Question 7Single Answer
Spirogyra is:
  1. A
    Filamentous
  2. B
    Unicellular
  3. C
    Parasitic
  4. D
    Coenocytic fungus
Question 8Single Answer
Spiral chloroplasts occur in:
  1. A
    Volvox
  2. B
    Chara
  3. C
    Spirogyra
  4. D
    Fucus
Question 9Single Answer
Green algae are placed mainly in:
  1. A
    Phaeophyceae
  2. B
    Chlorophyceae
  3. C
    Rhodophyceae
  4. D
    Bacillariophyceae
Question 10Single Answer
Brown algae belong to:
  1. A
    Rhodophyceae
  2. B
    Chlorophyceae
  3. C
    Cyanophyceae
  4. D
    Phaeophyceae
Question 11Single Answer
Red algae belong to:
  1. A
    Rhodophyceae
  2. B
    Chlorophyceae
  3. C
    Phaeophyceae
  4. D
    Euglenophyceae
Question 12Single Answer
The brown pigment in brown algae is:
  1. A
    Fucoxanthin
  2. B
    Phycoerythrin
  3. C
    Phycocyanin
  4. D
    Anthocyanin
Question 13Single Answer
The characteristic red pigment of red algae is:
  1. A
    Fucoxanthin
  2. B
    Phycoerythrin
  3. C
    Chlorophyll b
  4. D
    Carotene only
Question 14Single Answer
Reserve food in green algae is mainly:
  1. A
    Starch
  2. B
    Laminarin
  3. C
    Glycogen
  4. D
    Floridean starch
Question 15Single Answer
Reserve food of red algae is:
  1. A
    Floridean starch
  2. B
    Glycogen
  3. C
    Laminarin
  4. D
    Inulin
Question 16Single Answer
Brown algae commonly store:
  1. A
    Starch
  2. B
    Glycogen
  3. C
    Laminarin and mannitol
  4. D
    Cellulose only
Question 17Single Answer
The cell wall of many green algae contains:
  1. A
    Chitin
  2. B
    Lignin only
  3. C
    Peptidoglycan
  4. D
    Cellulose
Question 18Single Answer
Agar is obtained mainly from:
  1. A
    Gelidium and Gracilaria
  2. B
    Chlamydomonas
  3. C
    Volvox
  4. D
    Chara
Question 19Single Answer
Carrageenan is obtained from:
  1. A
    Green algae only
  2. B
    Red algae
  3. C
    Bryophytes
  4. D
    Fungi
Question 20Single Answer
Algin is commercially obtained from:
  1. A
    Brown algae
  2. B
    Red algae
  3. C
    Green algae
  4. D
    Mosses
Question 21Single Answer
Sargassum is a:
  1. A
    Brown alga
  2. B
    Green alga
  3. C
    Red alga
  4. D
    Fungus
Question 22Single Answer
Laminaria belongs to:
  1. A
    Green algae
  2. B
    Brown algae
  3. C
    Red algae
  4. D
    Mosses
Question 23Single Answer
Polysiphonia is a:
  1. A
    Red alga
  2. B
    Brown alga
  3. C
    Green alga
  4. D
    Blue-green bacterium
Question 24Single Answer
Ulothrix is a:
  1. A
    Brown alga
  2. B
    Filamentous green alga
  3. C
    Red alga
  4. D
    Liverwort
Question 25Single Answer
Oedogonium belongs to:
  1. A
    Phaeophyceae
  2. B
    Chlorophyceae
  3. C
    Rhodophyceae
  4. D
    Fungi
Question 26Single Answer
Chara is commonly called:
  1. A
    Stonewort
  2. B
    Club moss
  3. C
    Peat moss
  4. D
    Bread mould
Question 27Single Answer
Sexual reproduction in Spirogyra occurs by:
  1. A
    Conjugation
  2. B
    Budding
  3. C
    Binary fission
  4. D
    Fragmentation only
Question 28Single Answer
Asexual reproduction in Chlamydomonas commonly occurs by:
  1. A
    Zoospores
  2. B
    Seeds
  3. C
    Gemmae
  4. D
    Basidiospores
Question 29Single Answer
Motile reproductive cells of many algae are called:
  1. A
    Zoospores
  2. B
    Conidia
  3. C
    Ascospores
  4. D
    Gemmae
Question 30Single Answer
Isogamy involves fusion of gametes that are:
  1. A
    Produced in flowers
  2. B
    Always nonmotile
  3. C
    Very unequal in size
  4. D
    Morphologically similar
Question 31Single Answer
Oogamy involves fusion of:
  1. A
    Two equal motile gametes
  2. B
    Large nonmotile egg and small male gamete
  3. C
    Two spores
  4. D
    Two vegetative cells only
Question 32Single Answer
Volvox commonly exhibits:
  1. A
    Only isogamy
  2. B
    Oogamy
  3. C
    No sexual reproduction
  4. D
    Budding
Question 33Single Answer
Fucus shows mainly:
  1. A
    Isogamy only
  2. B
    Oogamy
  3. C
    Conjugation
  4. D
    Budding
Question 34Single Answer
Fragmentation is common in:
  1. A
    Marchantia only
  2. B
    Mango
  3. C
    Mushroom
  4. D
    Spirogyra
Question 35Single Answer
Pyrenoids are associated mainly with:
  1. A
    DNA replication
  2. B
    Protein digestion
  3. C
    Carbon fixation and starch formation
  4. D
    Cell division only
Question 36Single Answer
Pyrenoids occur inside:
  1. A
    Chloroplasts
  2. B
    Nuclei
  3. C
    Mitochondria
  4. D
    Vacuoles
Question 37Single Answer
Diatoms have cell walls rich in:
  1. A
    Lignin
  2. B
    Chitin
  3. C
    Silica
  4. D
    Suberin
Question 38Single Answer
The siliceous wall of a diatom is called:
  1. A
    Sporocarp
  2. B
    Capsule
  3. C
    Peridium
  4. D
    Frustule
Question 39Single Answer
Diatomaceous earth consists mainly of deposits of:
  1. A
    Moss leaves
  2. B
    Diatom frustules
  3. C
    Fungal spores
  4. D
    Pollen grains
Question 40Single Answer
Diatoms are important components of:
  1. A
    Phytoplankton
  2. B
    Soil fungi only
  3. C
    Bryophyte mats only
  4. D
    Root nodules
Question 41Single Answer
Many marine red algae can live at considerable depth because phycoerythrin absorbs:
  1. A
    Blue-green light efficiently
  2. B
    Only infrared
  3. C
    Only ultraviolet
  4. D
    Radio waves
Question 42Single Answer
Kelps are large members of:
  1. A
    Bryophytes
  2. B
    Red algae
  3. C
    Green algae
  4. D
    Brown algae
Question 43Single Answer
The holdfast of large marine algae functions mainly in:
  1. A
    Water conduction like xylem
  2. B
    Photosynthesis only
  3. C
    Sexual reproduction
  4. D
    Attachment
Question 44Single Answer
The leaf-like part of a large seaweed is often called:
  1. A
    Sorus
  2. B
    Rhizoid
  3. C
    Capsule
  4. D
    Blade
Question 45Single Answer
The stem-like region in some seaweeds is called:
  1. A
    Internode only
  2. B
    Rhizome
  3. C
    Petiole
  4. D
    Stipe
Question 46Single Answer
The life cycle with both multicellular haploid and diploid phases is:
  1. A
    Asexual
  2. B
    Haplontic only
  3. C
    Diplontic only
  4. D
    Haplodiplontic
Question 47Single Answer
Chlamydomonas commonly has a predominantly:
  1. A
    Sporophytic life cycle only
  2. B
    Diplontic life cycle
  3. C
    Haplontic life cycle
  4. D
    Triploid cycle
Question 48Single Answer
Fucus generally exhibits a:
  1. A
    Haplontic life cycle
  2. B
    Diplontic life cycle
  3. C
    Haplodiplontic cycle with dominant gametophyte
  4. D
    Triploid cycle
Question 49Single Answer
Ectocarpus commonly shows:
  1. A
    Haplodiplontic life cycle
  2. B
    Diplontic cycle only
  3. C
    Haplontic cycle only
  4. D
    No alternation of generations
Question 50Single Answer
Algae contribute significantly to global:
  1. A
    Soil erosion only
  2. B
    Nitrogen loss only
  3. C
    Oxygen production
  4. D
    Ozone depletion
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