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jyoti

HomeAuthor: jyotiPage 34

Pyrenoids are characteristically found in the chloroplast of

(a)  Fungi                                  (b)  Algae (c)   Pteridophytes                   (d)  Angiosperms Ans. b (44)

Floridean starch is found in

(a)  Chlorophyceae                  (b)  Rhodophyceae (c)   Myxophyceae                    (d)  Cyanophages Ans. b (5)

A filament of an alga can be differentiated from that of a fungus by

(a)  Cells are uninucleate in algae whereas they are multinucleate in fungi (b)  Chlorophyll present in algae and absent in...

Pyrenoids are the centre of formation of

(a)  Enzymes                            (b)  Proteins (c)   Fats                                    (d)  Starch Ans. d (7)

Sporophytic generation is represented by zygote only in

(a)  Funaria                               (b)  Chlamydomonas (c)   Pinus                                  (d)  Selaginella Ans. b (10)

Rhodophyceae is red coloured due to

(a)  Xanthophyll (b)  Carotenoids (c)   g–phycoerythrin (d)  g–phycocyanin Ans.c (8)

Algae are in the same major group of plants as are the

(a)  Mosses                               (b)  Liverworts (c)   Fungi                                  (d)  Ferns Ans. c (13)

Alga rich in protein is

(a)  Chlorella                            (b)  Spirogyra (c)   Oscillatoria                         (d)  Ulothrix Ans. a (21)

Red eye spot containing haematochrome is meant for

(a)  Photosynthesis                 (b)  Respiration (c)   Photoreception                 (d)  Movements Ans. c (9)

Pyrenoids are made up of

(a)  Core of starch surrounded by sheath of protein (b)  Core of protein surrounded by fatty sheath (c)   Proteinaceous centre...

Algae are important, we should study algae because

(a)  They are good organisms to experiment with (b)  They can be grown in large tank cultures (c)   They may...

All cells of sex organs are formed gametes in

(a)  Algae                                  (b)  Bryophyta (c)   Pteridophyta                     (d)  Gymnosperm Ans.a (10)

Palmella stage is produced

(a)  In rainy season (b)  During unfavourable conditions (c)   During favourable conditions (d)  None of the above Ans. b (11)

Zygospore is

(a)  Haploid                              (b)  Polyploid (c)   Diploid                               (d)  None of the above Ans. c (46)

Thermal algae are forms which grow and survive

(a)  In tropical regions where the temperature range is high (b)  In hot water springs where the temperature remains around...

The simplest green plants are

(a)  Yeast                                  (b)  Bacteria (c)   Algae                                  (d)  Lactobacillus Ans.c (8)

Which one of the following statements concerning the algae is wrong

(a)  Most algae are photosynthetic (b)  Algae can be classified according to their pigments (c)   All algae are filamentous (d) ...

23. More than one pyrenoid are present in

(a)  Ulothrix                              (b)  Spirogyra (c)   Oedogonium                       (d)  All the above Ans. d (16)

Algae which form motile colony is

(a)  Volvax                                (b)  Nostoc (c)   Spirogyra                           (d)  Chlamydomonas Ans. b (10)

Assertion : The time of vulcanisation and temperature is increased by adding accelerators. Reason : By vulcanising, a material of high tensile strength can be obtained.

a. If both assertion and reason are true and the reason is the correct explanation of the assertion. b. If...

Which among the following do you consider as the best evidence to show that two species of algae are closely related

(a)  They both respire and release CO2 (b)  They both are found in the same habitat (c)   They both reproduce...

The non-motile, greatly thickened asexual spores are called

(a)  Hypnospores                     (b)  Aplanospores (c)   Macrozoospores                (d)  Microzoospores Ans. a (8)

22. In biotechnological studies, the alga that is exploited as a rich source of protein is

(a)  Spirogyra                           (b)  Spirulina (c)   Chlamydomonas                (d)  Scytonema Ans. b (12)

An example of agarophyte is

(a)  Dictyota                             (b)  Fucus (c)   Nostoc                                (d)  Gelidium Ans. d (10)

Algal cell wall is composed of

(a)  Chitin                                 (b)  Cutin (c)   Cellulose                            (d)  Suberin Ans. c (10)

Which one is a parasitic algae

(a)  Vaucheria (b)  Polysiphonia (c)   Cephaleuros (d)  Batrachospermum Ans. c (51)

The biodegradable polymer is

a. Buna- s b. Nylon-6, 6 c. Nylon 2-nylon 6 d. Nylon- 6 Ans. c (14)

Gametes formed by meiosis are called

(a)  Coenogametes                  (b)  Meiogametes (c)   Mitogametes                     (d)  None of these Ans. b (30)

A motile flagellated asexual cell is called

(a)  Sperm                                (b)  Zoospore (c)   Oospore                             (d)  Androspore Ans. b (24)

Fusion of mature individuals which directly act as gametes, is called

(a)  Isogamy                             (b)  Anisogamy (c)   Hologamy                          (d)  Autogamy Ans. c (14)

In physiological anisogamy

(a)  Gametes are morphologically similar but physiologically dissimilar (b)  Gametes are morphologically dissimilar but physiologicaly similar (c)   Gametes are morphologically...

Which one of the following is not a accessory pigment

(a)  Chlorophyll ‘a‘                  (b)  Chlorophyll ‘e‘ (c)   Phycocyanin                      (d)  Xanthophyll Ans. a (10)

Coenobium means

(a)  A hollow spherical colony (b)  A group of filaments (c)   Palmelloid form (d)  None of the above Ans. a...

Iodine is obtained from the members of

(a)  Green algae                       (b)  Brown algae (c)   Red algae                           (d)  Blue–green algae Ans. b (10)

Which of the following polymer is biodegradable

Ans. c (7)

Assertion : 1, 3- Butadiene is the monomer for natural rubber. Reason : Natural rubber is formed through anionic addition polymerization.

a. If both assertion and reason are true and the reason is the correct explanation of the assertion. b. If...

Assertion : Teflon has high thermal stability and chemical inerthness. Reason : Teflon is a thermoplastic

a. If both assertion and reason are true and the reason is the correct explanation of the assertion. b. If...

Assertion : In Vulcanisation of rubber, sulphur cross links are introduced. Reason : Vulcanisation is a free radical initiated chain reaction.

a. If both assertion and reason are true and the reason is the correct explanation of the assertion. b. If...

In the life cycle of which group flagellated cells are not formed

(a)  Chlorophyceae                  (b)  Phaeophyceae (c)   Rhodophyceae                  (d)  Both (b) and (c) Ans. c (13)

Example of coenocytic algae is

(a)  Vaucheria                           (b)  Chara (c)   Nostoc                                (d)  Polysiphonia Ans. a (35)
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