NEET Biology Plant Kingdom MCQs Set 16

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Multiple Choice Questions

Question 1: Which of the following is a colonial alga?
(a) Chlamydomonas
(b) Ulothrix
(c) Volvox
(d) Spirogyra
Show Answer & Explanation

Answer: (c) Volvox

Explanation:
1. Volvox forms spherical colonies
2. Chlamydomonas is unicellular and Ulothrix and Spirogyra are filamentous

Teacher's Note:
1. Recall the NCERT fact.

Question 2: Which set of characters is specific to red algae?
(a) Phycobilins, chlorophyll a and c
(b) Chlorophyll a and d, floridean starch
(c) Flagella absent, mannitol
(d) Fucoxanthin, floridean starch
Show Answer & Explanation

Answer: (b) Chlorophyll a and d, floridean starch

Explanation:
1. Red algae have chlorophyll a and d, phycoerythrin and floridean starch
2. Fucoxanthin and mannitol belong to brown algae

Teacher's Note:
1. Recall the NCERT fact.

Question 3: An alga that is a source of protein is:
(a) Chlorella
(b) Nostoc
(c) Spirogyra
(d) Ulothrix
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Answer: (a) Chlorella

Explanation:
1. Chlorella is rich in protein and is used as single cell protein, even by space travellers

Teacher's Note:
1. Recall the NCERT fact.

Question 4: Brown algae are characterised by the presence of:
(a) fucoxanthin
(b) haematochrome
(c) phycocyanin
(d) phycoerythrin
Show Answer & Explanation

Answer: (a) fucoxanthin

Explanation:
1. The brown pigment fucoxanthin gives the algae their colour

Teacher's Note:
1. Recall the NCERT fact.

Question 5: An alga that is used as a food supplement even by space travellers is:
(a) Spirogyra
(b) Dictyota
(c) Spirulina
(d) Gracilaria
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Answer: (c) Spirulina

Explanation:
1. Spirulina is rich in protein, minerals and vitamins

Teacher's Note:
1. Recall the NCERT fact.

Question 6: In red algae, food is stored in the form of:
(a) floridean starch
(b) mannitol
(c) glycogen and leucosin
(d) laminarin
Show Answer & Explanation

Answer: (a) floridean starch

Explanation:
1. Red algae store floridean starch
2. Brown algae store laminarin and mannitol

Teacher's Note:
1. Recall the NCERT fact.

Question 7: Agar is obtained from:
(a) Polysiphonia and Porphyra
(b) Chlamydomonas and Spirogyra
(c) Gelidium and Gracilaria
(d) Chara and Chlamydomonas
Show Answer & Explanation

Answer: (c) Gelidium and Gracilaria

Explanation:
1. Agar comes from the red algae Gelidium and Gracilaria

Teacher's Note:
1. Recall the NCERT fact.

Question 8: Which of the following is a brown alga?
(a) Sargassum
(b) Volvox
(c) Ulothrix
(d) Chara
Show Answer & Explanation

Answer: (a) Sargassum

Explanation:
1. Sargassum, Laminaria and Fucus are brown algae

Teacher's Note:
1. Recall the NCERT fact.

Question 9: Red algae are named so because of the predominance of:
(a) xanthophyll
(b) r-phycoerythrin
(c) carotene
(d) chlorophyll a and b
Show Answer & Explanation

Answer: (b) r-phycoerythrin

Explanation:
1. The red pigment r-phycoerythrin dominates

Teacher's Note:
1. Recall the NCERT fact.

Question 10: The cell wall of brown algae is made up of:
(a) cellulose and chitin
(b) cellulose and peptidoglycan
(c) cellulose and algin
(d) cellulose and starch
Show Answer & Explanation

Answer: (c) cellulose and algin

Explanation:
1. The cell wall has cellulose with a gelatinous coating of algin

Teacher's Note:
1. Recall the NCERT fact.

Question 11: Which of the following is responsible for peat formation?
(a) Riccia
(b) Funaria
(c) Sphagnum
(d) Marchantia
Show Answer & Explanation

Answer: (c) Sphagnum

Explanation:
1. Sphagnum moss decays slowly to form peat, which is used as fuel

Teacher's Note:
1. Recall the NCERT fact.

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