Here, we have formulated all the questions from the 2018 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 2020 Botany question paper click here.

Part-1

The movement of water from roots to leaves is best explained by

Active transport

Osmosis

Cohesion tension theory

Pressure flow theory

Hutchinson revised his own system of classification in

1934

1949

1959

1980

In gametophyte phase of bryophyta the last cell is

Gamete

Spore

Elator

Zygote

Which of the following conditions does not stimulate the activity of allosteric enzyme RUBISCO?

Increase in pH

Increase in Mg²⁺

Increase in NADPH concentration

Increase in concentration of K⁺

Which of the following plant groups dominated the vegetation of earth during Jurassic period.

Cycadales

Coniferales

Gnetales

Ranales

The cell organelle which takes part in the storage and synthesis of lipids is

Peroxisome

Glyoxysome

Aleuroplast

Sphaerosome

Which immunoglobulin participate in allergic reactions

IgA

IgM

IgD

IgE

The Earth Summit was held in

Tokyo

New York

Rio de Janeiro

Sydney

Production of leaves and flower is due to

Cortex

Apical meristem

Lateral meristem

Intercalary meristem

10.

The father of green revolution is

R.F Thorne

Norman Borlaug

R.E Schultes

P.H.A Sneath

1 out of 5

11.

Endothecium is responsible for

Protection

Passage of nutrients

Dehiscence

None of these

12.

Agent that is used to enhance the frequency of somatic fusion is

Amylase

Protease

PEG

None of the above

13.

Which of the following method of plant transformation can be most successfully used to introduce a gene into chloroplast genome?

Agrobacterium mediated

Particle delivery system

Permeabilization

Electroporation

14.

Exponential growth in population can be expressed as

Lt = L₀ + rt

Lt = L_t + rt

Nt = N₀e^rt

None of these

15.

Global agreement in specific control strategies to resolve the release of ozone depleting substances was adopted by

Kyoto protocol

Montreal protocol

Vienna convention

Rio de Janeiro conference

16.

Parasexuality was first described in

Aspergillus nidulans

Fusarium oxysporum

Albugo candida

Ustilago nuda

17.

Presence of hydrogenase enzyme in some algae may be useful for

Energy production

Sewage disposal

Antibiotic production

Biofertilizer production

18.

Which of the following is the source of litmus

Indigophora tinctoria

Rubra tinctorium

Rocella tinctoria

None of these

19.

Which of the following is not a characteristic of heterochromatin?

Usually found in centromeric region

Identifiable in at least some interphase chromosomes

Associated with active genes

Located in the dark bands of polytene chromosomes

20.

Which of the following is not an example of allopolyploid?

Raphanobrassica

Evening primrose

Triticale

Triticum aestivum

2 out of 5

21.

A metagenome refers to

A large genome of an organism

The collective genome of many organism

The genome of a metazoan

Two identical genomes in different species

22.

How many phases are represented by the seeds of gymnosperms?

23.

Heterospory and seed habit are often exhibited by a plant possessing:

Petiole

Ligule

Bract

Spathe

24.

In higher plants, the red/far red sensory photoreceptor phytochrome, is a light regulated kinase. Which of the following classes of kinases does it represent?

Two component sensor regulator (histidine kinase)

Two component sensor regulator (serine/ threonine kinase)

Leucine rich repeat (LRR) receptor kinase

Calcium dependent protein kinase

25.

Permineralized fossils are

Impressions

Incrustations

Petrifactions

Casts

26.

In which molecule would the radiolabel carbon appear the earliest when wheat
and sugarcane leaves are fed with ¹⁴CO₂ ?

Wheat→ malate ; Sugarcane→ 3-Phosphoglycerate

Wheat→ aspartate ; Sugarcane→ malate

Wheat→ 3-Phosphoglycerate ; Sugarcane→ 3-Phosphoglycerate

Wheat→ 3-Phosphoglycerate ; Sugarcane→ malate

27.

G1 phase contains which Cyclin-CDK complex?

CDK4-Cyclin D

CDK2-Cyclin A

CDK2-Cyclin E

CDK1-Cyclin B

28.

The book "Plant genetic resources conservation and management concept and approaches" is edited by

Dr. M.S. Swaminathan

Dr. R.K. Arora

Dr. R.S. Paroda and Dr. R.K. Arora

Dr. S.K. Jain and Dr. A.K. Jain

29.

The tapetum in anther originates from

Sporogenous tissue and epidermis

Parietal layer and sporogenous tissue

Cells of connective tissue and epidermis

Parietal layer and cells of connective tissue

30.

The center of origin of "Citrus spp" is

Ethopia

S.E. Asia

United states

Brazil

3 out of 5

31.

Porogamy means entry of pollen tube into the ovule through

Micropyle

Chalaza

Funiculus

Integuments

32.

Which one is non-PCR based molecular marker

RFLP

RAPD

VNTRs

SSRs

33.

A genetic marker is

A place where a restriction enzyme cuts DNA

A chart that traces the history of a genetic trait

A nucleotide sequence near a particular gene

A radioactive probe used to find a gene

34.

The climax community/mature community is recognized by which of the following expression?

P = R

P > R

P < R

R > P

35.

Frequent occurrence of water blooms in a lake indicates

Nutrient deficiency

Oxygen deficiency

Excessive nutrient availability

Absence of herbivores in the lake

36.

Which of the following is a saprophyte

Ustilago

Agaricus

Puccinia

Erysiphe

37.

The well known fungicide Bordeaux mixture consists of

Lime and calcium sulphate

Sulphur and lime

Copper sulphate and lime

Copper sulphate and sulphur

38.

Coliphage ɸ x 174 contains

Single stranded DNA

Single stranded RNA

Double stranded DNA

Double stranded RNA

39.

In which plant polytene chromosome was discovered by Strasburger in 1887?

Fritillaria imperiales

Triticum vulgare

Oenothera blandiana

Crepis capillaris

40.

Apoptosis begins when

The cell is injured

Killer enzymes tear up the cytoskeleton

Death receptor on the cell membrane receives the signal to die

Caspases become activated

4 out of 5

41.

Bar eye in Drosophilla is the genetic effect of which type of chromosomal aberration?

Deletion

Translocation

Duplication

Inversion

42.

In Ephedra microspores are liberated from male gametophyte at

2-celled stage

3-celled stage

4-celled stage

5-celled stage

43.

In Funaria the calyptra is formed by

Antheridium

Columella

Capsule

Archegonium

44.

What will be the effect on osmotic potential (OP) if more solute is dissolved in solution?

OP will decrease

OP will increase

OP will become zero

OP will be unchanged

45.

During DNA replication, events at the replication fork require different types of enzymes having specialised functions except:

DNA polymerase III

DNA gyrase

DNA ligase

DNA glycosylase

46.

Which of the following cell organelle carry extra-nuclear genes?

Golgi body

Nucleus

Mitochondria

Endoplasmic reticulum

47.

Quarantine regulation are concerned with

Spraying a diseased plant with insecticide

Prevention of entry of diseased plant in country

Growing or entry of diseased plant in country

Hybrids of sexually reproducing plants

48.

In mature Arabidopsis embryo, root apical meristem consists of cells derived from

Embryo and apical suspensor cells

Embryo

Suspensor

Hypophysis

49.

Alphonse de Candolle classified the economic plants into

8 classes

6 classes

12 classes

4 classes

50.

Embryo sac is a

Megasporangium

Megaspore

Female sporophyte

Female gametophyte

5 out of 5

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