BOTANY PG TRB PREPARATION ONLINE TEST - 10

Botany PGTRB Online Test

1. Which of the following is the pollution indicator alga
A) Volvox
B) Stigeoclonium tenue
C) Chara
D) Coleochaete
2. The order that exhibits mainly heterotrichous habit is
A) Volvocales
B) Cladophorales
C) Ulotrichales
D) Cheatophorales
3. Alginic acid is obtained from the cell walls of members of
A) Fucaceae
B) Sargaceae
C) Ectocarpaceae
D) all above the familes
4. The symbiotic association of fungus with the root of plant is
A) Endophyte
B) Exophyte
C) Mycorhiza
D) Parasite
5. The protein cost of a virus is called
A) Capsid
B) Capsule
C) Capsomere
D) Capitulum
6. The bacterium surrounded by lateral flagella is called
A) Atrichous
B) Amphitrichous
C) Peritrichous
D) Lophotrichous
7. The nucleic acid in TMV has
A) ds DNA
B) ss DNA
C) ds RNA
D) ss RNA
8. The smallest Unit of DNA capable of coding for the synthesis of polypeptide
A) Operon
B) Cistron
C) Pronoter
D) Replicon
9. Which of the following Vitamins is the Precursor of CoA
A) Riboflavin
B) Pantothenate
C) Thiamine
D) Cobamide
10. The essence that is confectionary is got from one of the following plants
A) Vanilla fragrance
B) Coriandrum sativum
C) Cocos nucifera
D) Tectona grandia
11. The Marchantia from a single gemma germination the number of thalli formed is
A) 2
B) 4
C) 6
D) 8
12. The meristematic zone containing Bryophyte is
A) Riccia
B) Marchantia
C) Porella
D) Notothylas
13. Sometimes prothallus of a fern given rise to a fern plant. It is an example of
A) Apospory
B) Parthenogenesis
C) Parthenocarpy
D) Apogamy
14. Cellular organelles containing hydrolytic enzymes are called
A) Lysosomes
B) Microsomes
C) Ribosomes
D) Mesosomes
15. "Jumping genes" are
A) transposons
B) bacterophages
C) retroposons
D) microsatellite repeats
16. For plant tissue culture, which among the following is required
A) Trypsin
B) Kinetin
C) Caffeine
D) Coumarin
17. The activity of the cork cambium producers
A) Phelloderm
B) Secondary cortex & cork
C) Secondary cortex & phloem
D) none of these
18. The phenomenon of low temperture promotion of flowering is
A) Stratification
B) Impacion
C) Vernalisation
D) Phenology
19. Species that occur in different geographical regions separated by special barrier are
A) Allopatric
B) Autogenic
C) Sympatric
D) Allogenic
20. The technique by which the age of the plants is measured with the help of annual rings is known as
A) Dendrography
B) Autoradiography
C) Carbon dating
D) Dendrochronology
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Correct answers: