BHU MSC BOTANY ENTRANCE EXAM

Solved previous year question paper BHU MSC BOTANY ENTRANCE EXAM
Part-2

1. BHU MSC BOTANY
SOLVED QUESTION PAPER
2020
Part-2
Lalit Paraste
M.sc BotanU
BANARAS Hindu UniversitU
Que 41.Which of the following Statement is
Correct??
1.2c-value refers to DNA content in an auto-
tetraploid cell nucleus .
2.Alien Gene transfer through chromosome
involved recombination

2. 3.inbreeding leads to Homozygosity
4.A haploid plant is always a monoploid
Ans :-3 inbreeding leads to Homozygosity.
Explanation:-inbreeding leads to
Homozygosity,which can increase the chance of
being affected by recessive traits .This usually leads
to at least temporarily decreased fitness of a
population is known as inbreeding depression.
Que 42 in a cross,the same genotypic F2 ratio as
1:2:1 represents a case of
1.Co dominance
2.monohybrid cross with complete dominance
3.Dihybrid cross
4.monohybrid cross with incomplete dominance
Ans :- 4.monohybrid cross with incomplete
dominance
Explanation:-incomplete dominance is when a
dominant allele does not completely mask the effect
of a recessive allele.Ex .in Antirrhinum sp.
Phenotypic ratio :- 1:2:1
Genotypic ratio:-1:2:1

3. Que 43 Colchicine during root tip mitosis is used for
.
1 stopping cell division
2.enlarging chromosome
3.killing cells
4.stopping cell division
Ans:-4 stopping cell division
Explanation:-Cochicum autumnale belongs to the
Liliaceae family.
:-The effect of Colchicine,which inhibits
microtubules polymerization and thus assembly of
the mitotic spindle, stopping cell division and
condensing the chromosome.
Que.44 Synaptonemal Complex is associated with ??
1.Chromosome replication
2.interchange of chromosome segments
3.Chromosome doubling
4.Chromosome Condensation
Ans :- 2. Interchange of chromosome segments

4. Explanation:-that forms between homologous
chromatids ,& interchange of chromosome segments
also.
Que. .45 When the filament runs along the back of
anther it is called??
1.versatile
2.adanate
3.corona
4.synerenesious
And:- 2 adanate
Explanation:- An anther is adanate when fixed by its
whole length to the filament.

5. Que.:- 46which one of the following is used in
purification of polluted water??
1.cyclone Collector
2.LC 50
3.Trickling filter with biofilm
4.Electrostatic precipitator
Ans:-3.Trickling filter with biofilm
Explanation:-A trickling filter is a type of wastewater
treatment system,it consist of a fixed bed of rocks ,
coke,gravel ,slage, polyurethane foam over which
sewage or other wastewater flows downward and
cause a layer of microbial slime (biofilm)to grow,
covering the bed of media .

6. Que 47.r-selection of population is characteristics of
1.Linas
2.Seasonal or Annuals
3.Shrubs
4.trees
Ans:-2 Seasonal or Annuals
Explanation:-r-selected species are those that
emphasize high growth rate , typically exploit less
crowded ecological niches and produce many
offspring,each of which has a relatively low
probability of surviving to adulthood.

7. Que .47 The isoenzyme Lactate dehydrogenase (
(LDH) is a??
1.Hexamer
2.Tetramer
3.Monomer
4.Pentamer

8. Ans:-2 Tetramer
Explanation:-Lactate dehydrogenase is composed of
fóur subunits (tetramer) the two most common
subunits are the LDH-M and LDH -H
protein,encoded by the LDH A Gene and LDH B
genes .
These two subunits can form five possible
TETRAMER (isoenzyme) 4H,4M and the three
mixed tetramers (3H1M, 2H2M ,1H3H),these five
isoform are enzymatically similar but show different
tissue distribution.
Que.48 Development of female gametophyte of
Gnetum is ?
1.Bisporic type
2.Polysporic type
3.Tetrasporic type
4 .Monosporic type
Ans:-3.Tetrasporic type
Explanation:-The Sporogenous cells function. as
megaspore mother cells which undergo meiotic
division,since no walls are laid down after meiotic
division of megaspore mother spore ,all the four

9. nuclei remain within the mother cell to form
tetranucleate coen megaspore .so female
gametophyte of Gnetum is Tetrasporic .
Que. .49 Epigynous Flower with gamopetalous
Corolla is formed in family?
1.Apiaceae
2.Asteraceae
3.Lamiaceae
4.Myrtaceae
Ans:-2.Asteraceae (gamopetalous)
Polypetalae:- apiaceae,myrtaceae
Gamopetalous:-lamiaceae ( biacarpelatae)
Que 50 The fruit of Candy fruit is ??
1.Nut
2.Silicula
3.Lomentum
4.Siliqua
Ans:-2 Silicula
Explanation:-1).dehiscent dry fruits:-silicula ,siliqua

10. 1.Silicula:-when a siliqua fruit becomes much
shorter and flattened and as broad as it is long with a
few seeds ,is known as silicula fruit .
Ex :-Capsella,. and Candyfruit (Iberis amam)
2.Siliqua:-This is a long ,narrow ,many seeded fruit
,which develops from a superior bicarpellary ovary
with two Parietal placentae.
Ex.:- Brassicaceae (cruciferae). Mustard,. Raddish ,
Eruca
3.)Nut:-(indehiscent fruits)this is a dry ,one
chambered and one seeded fruit with hard and
Woody epicarp.
Ex.:-Chestnut ,Oak , Walnut,leechi
4.)Lomentum:-(Schizocarpic fruit) is a characteristic
of the mimosaceae family.(fruit is monocarpellary,
superior, unilocular ovary ,with marginal
placentation.)
Ex.:-Acacia, mimosa putida,Tamarind

11. Que .51 Batch Fermentation is also called??
1.Fed Batch system Fermentation
2.Closed System Fermentation
3.Open System Fermentation
4.Sub- merged System Fermentation
Ans:-2. Closed System Fermentation
Explanation:-Batch culture is closed System of
fermentation,Bach culture is a process where all the
substrate and nutrients are added at zero time or
soon after inoculum take place and the vessel is
allowed under a controlled environment to proceed
until maximum end product concentration is
achieved.
Que.52 Protein are Post - Transcriptionally modified
in ??
1.Mitocondria
2.Lysosome
3.Golgi Apparatus
4.Endoplasmic reticulum
Ans :- 3. Golgi Apparatus

12. Que.53 Cisternae , Secretory Vesicles tubules are
Part of ??
1.Mitocondria
2.Lysosome
3.Golgi Complex
4.Choloroplast
Ans:- 3 Golgi Complex
Explanation:-Cisterne , secretory Vesicles present IN
Golgi Complex.
Golgi Apparatus is made up of a series of flattened
,stacked pouches is called Cisternae.the Golgi
Apparatus responsible for transporting, modifying
and packaging of protein and lipids into vesicles for
delivery to targeted destinations.
Que.54 Sulphur Containing amino acids are??
1.Cystein &Threonine
2.Cystein &Serine
3.Methionine & Serine

13. 4.Methionine & Cysteine
Ans:- 4 Methionine &Cysteine
Explanation:-both are Sulphur Containing amino
acids and Methionine is essential Amino acid &
cysteine non essential Amino acid.
Que.55 Which of the following is an Example of RNA
VIRUS??
1.T4 Phage
2.SV 40
3.Tobacco mosaic virus
4.Adenovirus

14. Ans:- 3. Tobacco mosaic virus
Explanation:- Tobacco mosaic virus is a positive
sense single stranded RNA (SSRNA)virus species in
the Tobamovirus that infect wide range of plants,
especially tobacco and other members of the
solanaceae family.the infection cause characteristics
patterns such as mosaic like mottling and
discoloration on the leaves
Que.56 Plant Synthesized AUXIN the amino acid ?
1.Cystine
2.Ornithine
3.Phenylalanine
4.Tryptophan
Ans:- 4 Tryptophan

15. Explanation:-indole 3 acetic acid is the most
important natural hormone in plants . mainly
Synthesized from the amino acid Tryptophan.
Que.57 Example of Partial Stem Parasite is ??
1.Striga
2.Viscum
3.Cuscuta
4.Orobanche
Ans:- 2.Viscum

16. Explanation:- 1)partial stem parasite:- viscum
,loranthus .
2)Total stem parasite:-Dooder ,Cuscuta
3)Partial root parasite :- Striga , Santalum album
4)Total root parasite:- Orobanche
,Rafflesia,Balanophora,Canopholis,Hydnora .
Que.58 Stomata are present in Funaria plant on ?
1.Capsule
2.Foot
3.Seta
4.None of these
Ans:- 1 Capsule
Explanation:- Stomata are present in the capsule
(apophysis) of Funaria .

17. Que.59 The two strands of DNA are held together
by?
1.S-S Bond
2.Hydrogen Bond
3.Peptide Bond
4.Phosphodiester Bond
Ans:- 2 Hydrogen Bond
Explanation:-DNA is a double helical structure and
both strands are connected or linked through
hydrogen bonds.

18. Que.60 Virus that attack O2 evolving Photosynthetic
Prokaryotes are Called??
1.Cyanophage
2.Coliphage
3 .Bacteriophage
4.Mycophage
Ans :- 1 Cyanophage
Explanation:-Cyanophage are first reported by :-
Safferman and Morris (1963)
Cyanophage are viruses that infect
cyanobacteria.and its head is icosahedral and double
standard DNA .
Que.61 The inverted Pyramid of Biomass in observed
??

19. 1.Alphine ecosystem
2.Desert ecosystem
3.Grassland ecosystem
4.Lake ecosystem
Ans:- 2 Desert ecosystem
Explanation:-desert ecosystem is inverted Pyramid
of Biomass because of lack of water , nutrients and
plants also so less Biomass and more organisms .
Que.62 Which one of the following is incorrect for
Solanaceae Family?
1.Parital Placentation
2.Carpel -2
3.Oblique Ovary
4.Persistant Sepal
Ans:- 1 Pariétal Placentation
Explanation:-in solanaceae family members have
Axile Placentation.
Que.63 There is no Chloroplast endoplasmic
reticulum membrane around the Chloroplast in
member of ?
1.Rhodophyta
2.Dinophyta

20. 3.Pheophyta
4.Cryptophyta
Ans:- 1 Rhodophyta
Explanation:- Rhodophyta lack of double layer
envelope of Endoplasmic reticulum around it.many
algae possess double layer envelope of ER.
Que.64 In a heterozygote during Pachytene ,Loop
out Configuration on the normal Chromosome
indicates??
1.Trsnslation
2.Deletion
3.Duplication
4.inversion
Ans:- 4 inversion( pericentric inversion)
Explanation:-During meiosis ,the inverted and non
inverted chromosomes pair point for point along
their length.however , because because of the
inversion,the chromosome must forms a loop to
allow for pairing in the region where their Genes are
reversed in order ,in this pairing configuration, only
one chromosome is looped,other chromosome
conform around it.
Que .65 Molybdenum is a Component of enzyme??

21. 1.Catalase
2.Uptake Hydrogenase
3.Urease
4.Nitrogenase
Ans:- 4 Nitrogenase
Explanation:- Nitrogenase contain two components
1.)HETEROTETRAMERIC :- MoFe protein
A Nitrogenase which use the electron provide to
reduce N2 to NH3
2.)HOMODIMERIC :- Fe protein
The reductase has a highly reducing power and is
responsible for the supply of electrons .
Que.66 XY Sex-Determination Mechanism in Plant
was extensively studied in?
1.Coccinia indica
2.Datura stramonium
3.Triticum aestivum
4.Cajanus cajan
Ans:- 1.Coccinia indica
Explanation:-XY sex determination in plant by
McKay &Sutaria.

22. Coccinia indica has an active XX - XY system
heterogamatic and morphologically distingusible sex
chromosome.( 2N =24)
Que.67 A lipid bilayer is held together by??
1 .The attraction of phospholipids heads to each
other
2.Hydrophobic force
3.Double bond in their fatty acid tails
4.Surface Tension
Ans:- 2 Hydrophobic force
Explanation:-lipid bilayer held together by
hydrophobic force.
Que.68 When a fungal Parasite require tissue than
one Host to Complete it's Life Cycle?
1.Autoecism
2.Heteroecism

23. 3.Heterotrophism
4.Autotrophism
Ans:- 2.Heteroecism
Explanation:- The development of different stages of
spores in different hosts .
Ex. Puccinia .
1.)Primary host wheat :- urediospore
,Teleutospore,basidiospore
2)Secondary host:- Barbery ( pycniospores and
aeciospore)
Que.69 Endotoxin Produced by Gram negative
Bacteria is Present in??
1.Inner membrane
2.Teichoic acid
3.Peptidoglycan
4.Lipopolysacharide
Ans:- 4 Lipopolysaccharide
Explanation:-lipopolysaccharides also known as
endotoxin,are large molecule consisting of a lipid
and polysaccharide composed of O-antigen ,outer
core and inner core joined by a covalent bond they

24. are found in outer membrane of the gram negative
bacteria.
Que.70 Who elaborated the Concept of Ecological
Race ??
1.Odum
2.Darwin
3.lovelock
4.Turesson
Ans:- 4. Turesson
Que.71.Locally adapted genetically distinct
population of a Species with wide geographical
distribution are called?
1.Ecophene

25. 2.Ecades
3.Habitat Forms
4.Ecotype
Ans:- 4. Ecotype
Explanation:-These different variants can occur in
the same geographic region where distinct habitats
such as forest ,swamp provide an ecological niche.
Que.72 Complete linkage is found in?
1.Female Hen
2.Male Drosophila
3.Male Peacock
4.Female Cobra
Ans:- 2 Male Drosophila
Explanation:- complete linkage means When two
loci are so close together that allele of these loci are
virtually never separated by crossing over.
Que.73 Termination of Polypeptide Chain is brought
about ?
1.UCG,GGG & ACC
2.UUG ,UGC,&UCA
3.UAA,UAG &UGA
4.UUG,UAG & UCG

26. Ans:- 3. UAA,UAG &UGA
Explanation:- non - sense codon or stop codon etc.
Que.The enzyme that join the the Okazaki fragments
is ??
1.Helicase
2.Topoisomerase
3.DNA Polymerase 1
4.DNA ligase
Ans:- DNA ligase
Explanation:-ligase used for joining the fragments.
Que.75 Resin duct in Pinus stem represent a ?
1.Schizogenous Cavity
2 Intercellular space
3.Lysogenous cavity
4.Large Vacuole
Ans:- 1 Schizogenous Cavity
Explanation:- A schizogenous cavity formed by
separation of cell wall from each other along or less
extended area of their contact forms an intercellular
space in which intercellular substance dissolves
partly and becomes large in size.
Que.76 Neuromotor apparatus is found in ??

27. 1.Pogonatum
2.Scytonema
3.Batrachospermum
4.Chlamydomonas
Ans:- 4 Chlamydomonas
Explanation:-Chlamydomonas revealed a fibrous
system, the neuromotor apparatus,which appeared
to link physically the flagellar apparatus to the cell
nucleus.
Que.77 Crossing over take place of ?
1.Diplotene
2.Zygotene
3.Pachytene
4.Diskinesis
Ans :- 3. Pachytene
Explanation:- crossing over take place in pachytene
(meiosis I ,Prophase )
Que.78 Co enzyme are ?
1.Non- protein reactants
2.Non-Protein ,organic molecule that act as Cofactor
3.Metallic side group associated with non- protein
enzyme

28. 4.Metallic side group associated with all enzyme
Ans:- 2. Non- protein ,organic molecules that act as
Cofactor.
Que .79 Chloroplast development is promoted by?
1.Cytokinin
2.Ethylene
3.Abcisic Acid
4.Auxin
Ans:- 1 Cytokinin
Explanation:- Cytokinin is a plant
Hormone.Cytokinin regulating the development and
activity of Chloroplast.
Que.80 In Escherichia Coli ,Lac operone is induced
by?
1.beta- galactosidase
2.Lactose
3.Promoter Gene
4.I- Gene
Ans:- Lactose
Explanation:- The lactose operon (Lac operon)is an
operon required for the transport and metabolism of

29. lactose in E.coli..the lac operon allow for the
effective digestion of lactose when glucose not
available through the activity of beta -galactosidase .
Lactose metabolism system was used by :-F. Jacob
and J Monod.