Here, we have formulated all the questions from the 2020 PhD Botany entrance exam in the form of a quiz, to help all those who will be appearing in this exam in the coming years.

The quiz is available in two parts, each comprising 50 questions. The part-1 is given below.

To solve the other parts click on the links given below- Botany Part-2

Part-1

In C₃ plants, first stable product of CO₂ fixation is:

3-PGA

OAA

Starch

Glucose

Plant succession occurring in a sandy area is :

Xerosere

Halosere

Psammosere

Hydrosere

Which class of fungi among the following have motile cells with two laterally inserted flagella, one tinsel and other whiplash ?

Chytridiomycetes

Zygomycetes

Deuteromycetes

Oomycetes

Bottle hepatics is the common name of the members of :

Marchantiales

Sphaerocarpales

Anthocerotales

Junger manniales

For breaking a DNA strand, following enzyme is used :

Ligase

Nuclease

Polymerase

Alkaline phosphatase

Which of the following is an example of ex-situ conservation?

National Park

Wildlife Sanctuary

Seed Bank

Sacred Grooves

The chemical widely used for inducing polyploidy is :

Sodium hydroxide

HCI

H₂SO₄

Colchicine

Desmotubules are related to :

Mitochondrion

Plastids

Plasmodesmata

Golgi apparatus

The type studied by founding author at the time of describing new taxon is called :

Holotype

Lectotype

Paratype

Neotype

10.

Each turn of β-oxidation spiral generates two reduced co-enzymes in the form of:

Two NADH molecules

Two FADH₂ molecules

One NADH and one FADH₂molecules

None of the above

1 out of 5

11.

Amensalism may be defined as:

In which one population is benefited but the other is not affected

In which one population is inhibited and the other is not affected

In which neither population is affected by association with the others

In which both population actively inhibit each other

12.

The infamous Bengal famine is related with :

Potato

Rice

Wheat

Maize

13.

Fern gametophyte is :

Homothallic

Heterothallic

Heteroecious

Autoecious

14.

Synthetic seeds cannot be categorised as :

Desiccated seeds

Hydrated seeds

True seeds

Artificial seeds

15.

Plants with environmentally induced variations which are not genetically fixed called :

Ecads

Ecophenes

Ecotypes

Ecotone

16.

illegitimate recombination is another name for :

Site specific recombination

Transposition

Homologous recombination

Translesion DNA synthesis

17.

The regulatory sub-unit of Maturation Promoting Factor (MPF) is called :

Cyclin

Kinase

Tetracyclin

Interleukin

18.

Pyrimidine dimers in DNA are formed when the cells are exposed to :

UV light

Cosmic rays

X-rays

Gamma rays

19.

Photolysis or water splitting complex is present in :

Grana

Stroma

Thylakoid lumen

Outer membrane

20.

In which geological period, gymnosperms were dominant ?

Jurassic and cretaceous

Triassic and Jurassic

Triassic and cretaceous

Pliocene

2 out of 5

21.

The apoptosome complex is constructed from :

Apaf-1, cytochrome C, ATP and procaspase

FasL , cytochrome C and Apaf-1

FasL,CD95 and FADD

Cytochrome C, Apaf-1 and procaspase-8

22.

Lipid bilayers of cell membranes in chill-resistant species have :

Higher proportion of saturated fatty acids

Higher proportion of unsaturated fatty acids

Only saturated fatty acid

Equal proportion of saturated and unsaturated fatty acid

23.

Which of the following symbiotic association is not useful as biofertilizer?

Rhizobium and leguminoun root

Algae and fungi

Azolla and Anabaena

Roots of higher plants and fungi

24.

In Marchantia, the archegonia are surrounded by a common involucre called :

Operculum

Perichaetium

Perigonium

Peritonium

25.

Choose the correct combination :

Somaclonal variation- Larkin and Scowcroft

Somaclonal variation- Gottlieb Haberlandt

Somaclonal variation- Miller and Skoog

Somaclonal variation- Steward

26.

In Gymnosperms, endosperm is :

Haploid

Diploid

Triploid

Tetraploid

27.

Caspases are involved in which of the following :

Atrophy

Necrosis

Apoptosis

Accidental cell death

28.

In vernalization, the cold stimulus is perceived by :

Lateral meristems

Intercalary meristems

Apical meristems

All of the above

29.

Symbiotic nitrogen fixation occurs in nonleguminous Alder tree by :

Rhizobium

Frankia

Pseudomonas

Nitrosomonas

30.

RNA viruses have genome that consists of RNA. What must a positive strand RNA virus do before it can replicate ?

Nothing, it is ready to start translating protein

It must make a positive strand RNA to be translated

It must use reverse transcriptase to convert RNA to DNA

It must become a prophage before replicating

3 out of 5

31.

Rhynia belongs to a geological period called:

Carboniferous

Permean

Devonian

Cambrian

32.

A cell suspension culture grown in a fixed volume of nutrients culture medium is :

Continuous culture

Semicontinuous culture

Batch culture

Open continuous culture

33.

First National Park established in India is :

Kaziranga National Park

Bandipur National Park

Corbett National Park

Kanha National Park

34.

Endemic species are :

Rare species

Cosmopolitan in distribution

Species unique to a defined geographical location

Critically endangered species

35.

Loss in chromosomes leading to double monosomic condition in a diploid organism would be represented as :

2n-1

2n-2

2n-1-1

2n+2

36.

Which of the following organelle is called ‘ Perinuclear dense bodies’ ?

Lysosomes

Nucleosome

Peroxisome

None of these

37.

Girdling leaf traces are the characteristic feature of the stem of :

Gnetum

Ephedra

Cylcus

Pinus

38.

Albuminous seeds store their reserve food mainly in :

Perisperm

Endosperm

Cotyledons

Hypocotyl

39.

Within habitat and within community diversity is expressed as :

Beta diversity

Alpha diversity

Gamma diversity

Simpson's index of diversity

40.

Kelp are which of the following type of algae?

Red algae

Yellow algae

Brown algae

Green algae

4 out of 5

41.

Bryophytes are indicator of :

O₃

SO₂

NO₃

42.

Chromosome number in Arabidopsis thaliana is :

2n=10

2n=5

2n=20

2n=30

43.

Which of the following is mismatched?

Tundra-Permafrost

Savannah-Acacia tree

Prairie-Epiphytes

Coniferous forest-Evergreen tree

44.

Which of the following is common to both E. coli and eukaryotic chromosome ?

The DNA is circular

The DNA is packaged into nucleosomes

The DNA is contained in the nucleus

The DNA is negatively supercoiled

45.

Mitochondrial DNA is :

Simple, single stranded, linear DNA molecule

Simple, single stranded, circular DNA molecule

Simple, double stranded, linear DNA molecule

Simple, double stranded. circular DNA molecule

46.

‘Genera Plantarum ‘was written by :

Engler and Prantl

Carl Linnaeus

A.P. De Candolle

Bentham & Hooker

47.

2, 4-D is an effective:

Rodenticide

Fungicide

Wormicide

Weedicide

48.

Succession beginning with P>R is :

Heterotrophic succession

Autogenic succession

Allogenic succession

Autotrophic succession

49.

Reindeer moss is :

Sphgnum magellanicum

Marchantia polymorpha

Cladonia rangifera

Equisetum arvense

50.

In Dryopteris the antherozoids are :

Biciliate and coiled

Biciliate and sickle shaped

Multiciliate and coiled

Multiciliate and sickle shaped

5 out of 5

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