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 four parts, each comprising 25 questions. The part-2 is given below.

To solve the other parts click on the links given below-

Click here to solve- Botany Part-1

Part-2

A shoot bud formed in the cultured explant is a :

Bipolar structure

Monopolar structure

Either of both

None of the above

None

The most diversity rich zone in India is :

Western Ghats

Gangetic Plains

Central India

Western Himalaya

None

Britten and Davidson proposed the :

Gene Battery Model of gene expression

Split gene concept

Operon Model of gene expression

None of the above

None

Polysomes are :

Multiple units of ribosomes

Attachment of many mRNAs to a common ribosome

Attachment of many ribosomes to a common mRNA

Lysosomal aggregations

None

When a specific epithet exactly repeat the generic name, it is known as :

Paraname

Tautonym

Synoname

Basioname

None

In mitochondria, proton accumulate in the :

Intermembrane space

Matrix

Outer membrane

Inner membrane

None

The fraction of the total amount of a substance in a compartment that is released in a given period of time is called :

Turnover rate

Turnover time

Residence time

Decomposition rate

None

The citrus canker lesions are characterized by the over-development of:

Parenchymatous tissue

Epidermal tissue

Ectodermis

Endodermis

None

Trabeculae in Selaginella is modification of:

Pericycle

Endodermis

Pericycle and endodermis

Cortex

None

10.

The first observation of in vitro somatic embryogenesis was made in:

Datura innoxia

Citrus spp.

Zea mays

Daucus carota

None

1 out of 5

11.

Which of the following factor is least responsible for causing threat to biodiversity?

Habitat destruction

Habitat fragmentation

Pollution

Agricultural and horticultural activities

None

12.

The concept of recon was proposed by Seymour Benzer by studying recombination between :

Lysis mutants of bacteriophage T₄

White eye mutants of D. melanogaster

Biochemical mutants of Neurospora crassa

Auxotrophic mutants of Escherichia coli

None

13.

Which of the following is an immuno diffusion test ?

Double diffusion

Gel diffusion

Ouchterloney technique

All of the above

None

14.

Most of the families of primitive angiosperms belong to the order :

Asterales

Orchidales

Magnoliales

Malvales

None

15.

G-proteins are GTP binding proteins that are involved in :

Signal transduction pathways

Biosynthesis of gibberellins

Biosynthesis of auxins

None of the above

None

16.

The term phytoremediation refers to the :

Use of plants for removing pollutants from the environment

Use of plants as remedies to cure diseases

Use of plants for restoration of degraded forests

Use of plants in the retention of soil water

None

17.

Bordeaux Mixture is made up of :

Copper sulphate

Copper sulphate and lime

Copper sulphate, lime and water

Mercury and copper sulphate

None

18.

Filmy fern is the common name of :

Matonia

Hymenophyllum

Dicksonia

Cyathea

None

19.

The inherent potentiality of a plant cell to give rise to a whole plant is described as :

Somatic embryogenesis

Cellular totipotency

Pluripotency

Callus formation

None

20.

The headquarter of IUCN is at :

New York, USA

Paris, France

Vienna, Austria

Morges, Switzerland

None

2 out of 5

21.

Holliday structure is formed during :

Homologous recombination

Site specific recombination

Transposition

None of the above

None

22.

Protein synthesis by eukaryotic ribosomes is inhibited by :

Chloramphenicol

Cycloheximide

Penicillin

Cinchonine

None

23.

Which of the following condition in the flower is considered to be primitive ?

Perigyny

Epigyny

Agyny

Hypogyny

None

24.

Photolysis of water in photosynthesis requires the presence of :

Mn⁺⁺ ions

Mn⁺⁺and Cl^-ions

Mg⁺⁺ ions

K⁺ and CI^- ions

None

25.

Net Ecosystem Production (NEP) can be expressed as:

NEP=GPP-(plant respiration + heterotrophic respiration)

NEP=NPP-(plant respiration + heterotrophic respiration)

NEP= GPP+(plant respiration -heterotrophic respiration)

NEP=NPP+(plant respiration -heterotrophic respiration)

None

26.

Carpogonia is the female sex organ in which of the algae ?

Rhodophycophyta

Xanthophycophyta

Chrysophycophyta

Chlorophyllyta

None

27.

Amphiphloeic siphonostele is found in :

Psilotum

Ophioglossum

Pteris

Marsilea

None

28.

Biofertilizers include :

Anabaena, Nostoc, DDT, Azolla

Anabaena, Nostoc, Trichoderma spp ., Azolla

Anabaena , Nostoc, Agrobacterium, Azolla

All of them

None

29.

Biodiversity term was coined by :

R.F. Oasmann

R.H. Whittaker

Thomas Lovejoy

Walter G. Rosen

None

30.

An Hfr strain of E. Coli contains :

A bacterial chromosome with a human gene inserted

A bacterial chromosome with the F factor inserted

A human chromosome with a transposable element inserted

A bacterial chromosome with a phage inserted

None

3 out of 5

31.

Levene investigated and found that the nucleic acid is composed of polynucleotides and each nucleotide is composed of one base, a sugar molecule and a phosphate. This was performed on the genome of :

Bacteria

Yeast

Fungi

WBCs

None

32.

Which of the following is not a part of graminaceous floret ?

Lemma

Lodicules

Palea

Scutellum

None

33.

Delay of senescence or Richmond Lang effect is a physiological effect of :

Indole Acetic Acid

Cytokinins

Gibberellins

Ethylene

None

34.

Which statement is true ?

Leaching never results from waterpercolation through an organic structure such as fallen trees

Biological fragmentation cannot be caused by both plants and animals

Metabolism of organic material is primarily not a microbial activity

Fragmentation is the process of pulverization or reducing into small particles

None

35.

The causal organism of wilt of cotton wilt is :

Fusarium oxysporium

Puccinea gaminis

Alternaria alternata

None of the above

None

36.

Which one of the following is the largest bryophyte?

Fontinalis

Pogonatum

Andreaea

Sphagnum

None

37.

Tannin, a secondary metabolite belongs to following class :

Alkaloid

Terpenes

Phenolics

None of the above

None

38.

'Hot Spots' term was coined by :

E.O. Wilson

Norman Myers

A.G. Tansley

C. Elton

None

39.

In polytene chromosome bundle of fibrils arises by the process of :

Amitosis

Endomitosis

Mitosis

Meiosis

None

40.

CdK₂,/cyclin E functions in phase/ transition :

G₂

G₁/S transition

G₂/M transition

None

4 out of 5

41.

The botanical name of larkspur is :

Ranunculus

Viola

Paeonia

Delphinium

None

42.

GA induced signal transduction pathway that leads to expression of α-amylase gene in cells of aleurone layer is :

Ca²⁺ - dependent

Ca²⁺ - independent

Both (A) and (B)

None of the above

None

43.

The term keystone species was proposed by :

Tilman

Chapin

Vitousek

Whittaker

None

44.

Helotism is a term used for the symbiosis between :

Algae and bacteria

Algae and bryophyte

Algae and fungi

Algae and pteridophyte

None

45.

Internally undifferentiated thallus is found in :

Marchantia

Pellia

Riccia

Plagiochasma

None

46.

Which of the following steps are catalysed by Taq polymerase in a PCR reaction ?

Denaturation of template DNA

Annealing of primers to template DNA

Extension of primer end on the template DNA

All of the above

None

47.

Earth Summit at Rio-de-Janeiro was related to :

Soil fertility

Survey of Natural resources

Conservation of environment

Prevention of afforestation

None

48.

The chromosomal proteins, histones are rich in :

Arginine but not lysine

Tryptophan and histidine

Lysine but not arginine

Lysine and arginine

None

49.

Which of the following nucleic acid has a left handed helix ?

Z-DNA

A-DNA

B-DNA

m-DNA

None

50.

Vexillary aestivation is seen in the members of family :

Cucurbitaceae

Rosaceae

Poaceae

Fabaceae

None

5 out of 5

Time's up

Kumaun University Botany PhD Entrance Questions Part-2

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