BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 20o,6
L IF ES C IE N C E
L S E -1 : C E L LB IOL OGY
Time : 2 hours Maximum Marks 50
Note : Answer the questions directed under Sections
as A,
B and C. Draw neot and labelleddiagramswhereuer
necessqrv.
SECTION A
Answer all questions.
Al. Fill in the bfanks: 7x5:5
(i) The cell organellethat replenishes oxygen in the
the
atmosphericair is _ .
(ii) The cytoskeletalsystem of a eukaryotic cell is made
'
of mesh of fibres, such as and
microfilamentsthat criss-cross
through cytoplasm.
LSE-1 P.T.O.
(ii1 tn meiosis ttie "chromosorriesare duplicated during
(iv) The pumping and channelling of molecules across
plasma membrane is carried out by transmembrane
(v) Increased concentration of Ca2* in the smooth
musclesstimulates activitY.
A2. Choose the correct answer in the following from the
options given for each : 7x3
(i) A molecule of ATP i. ,t*.t,rrutty O-,fu, a
(a) RNA nucleotide
(b) DNA nucleotide
(c) amino acid
(d) fatty acid
(ii) Which one of the following substances moves
regularly from nucleusto the cytoplasm?
(a) Glycogen
(b) DNA
(c) RNA
(d) Cholesterol
LSE-1
(iiil Lignin is a component of the 9e99ndqrycell walls of
(a) Epidermis
(b) Sclerenchyma
(c) Parenchyma
(d) Collenchyma
A3. Choose the correct answer from the alternativesgiven in
,
.parentheses 7x2
(i) The enzymes which catalyse the same chemical
reaction but have distinct chemical properties are
called (isoenzymes,/holoenzymes).
(ii) The enzlme (helicase,/topoisomerase) disrupts
hydrogen bonds between base pairs and thereby
createssingle strandedregions.
LSE-1 P.T.O.
SECTK)N B
Attempt any tour questions.Each question carries tiue
morks.
Bl. Compare the advantages of scanning and transmission
over light microscope.
electronmicroscopes
82. Describedifferent stagesin the evolution of eukaryotes. 5
83. Explain the formation of the following tissues in animal
development : zj+z|
(i) Epithelium
(ii) Nerve ganglion
84. Schematically outline the relationship between the catabolic
and anabolic pathways. (No description is required) 5
85. Explain genetic control of enzyme activity in bacteria as
proposed Jacob
by and Monod. 5
86. Describe Ihe events that occur before a cell can enter
mitosis.
87. Describe the operation of proton pump in oxidative
phosphorylation.
LSE-1
SECTION C
Attempt any two questions.Each question carries ten
marks.
Cl. (i) List the categories enzymes
of operatingin a cell.
(ii) Why is it necessarythat the enzymeactivity must be
regulated?
(iii) List variousmodes of their regulationand explain any
one in detail. 3+2+5
C2. (1) With the help of a suitable diagram describe the
structureof nucleus.
(ii) Give an illustrated account of the various levels of
organisationfrom DNA to chromosome a cell.
in 5+5
Ca. (i) List the varioustypes of tissuespresent in plants and
animals.
(ii) Describethe conductingtissues plants.
of 5+5
C4. (i) List the different criteria for the separation of
macromolecules from a mixed population.
(ii) Describeone techniqueeach basedon any two of the
above criteria. 4+6
LSE-1
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LSE-5 15 4,000
a
a
BACHELOR OF SCTENCE (B.Sc.)
Term-End Examination
June, ?OOG
L IF ES C IE N C E
LSE-6 : DEVELOPMENTAL
B|OLOGY
Time : 2 hours MaximumMarks: 50
Note : Answer Part I and part II in separateanswercopies.
Answer the questionsqs per instructions in esch
section. Draw labelled diagrams, whereuer
necessary.
PART I
PI.^ANTS
SECTION A
Note : Answer all questions.
Fill in the blanks.
Al. A true fruit developsfrom the
42. The age of a tree can be determined by studying its
7
LSE-6 P.T.O.
A3- An outgrowth near the micropyle that guides Pollen tube
entry into ovule is called
A4. In Mangifera indico several embryos originate from
cells.
A5. In angiospermsthe female gametophyteis representedby
LSE-6
SECTION B
Note : Answer anY fout questions-
81. List various anther wall layers and describethe function(s)
performedby each of these. 1+4=5
82. Describe any two adaptations in bisexual flowers for
preventingself-pollination. Z|+Z)=S
83. What is organogenesis Discuss role of plant hormones
? the
in this process. 1+4:5
84. Write short notes on any two oI the following : 2jx2:5
(il Quality of wood
(ii) GeotroPism
(iii) Somaticembryogenesis
85. Make labelleddiagramsof any tuo of the following : Z|"Z=S
(il Median longitudinal section of mature embryo of
Triticum.
(ii) L.S. of shoot apex showingtunica and corpus'
(iiil T.S. of modifiedroot of sweetpotato'
How do these help in
86. Describevariousseed appendages'
elfectivedispersalof seed ? 2t+Z|=S
LSE-6 P.T.O.
PART IT
AMMAIS
SECTION A
Note : Answerall questions.
41. Fill in the blanks:
|"a:s
(i) The type of growth in which different parts of the
body grow at different rates is known as
growth.
(ii) In birds, the type of blastula produced is known as
(iii) The regular replacementof RBCs in our body is an
example of -._-.--- regeneration.
(iv) - hormone is responsibleior the retention of
larval charactersin insectsand ecdysonepromotes the
process.
(v) The movement of cells influenced by the physical
surface,over which they pass is termed as _
(vi) Determination of limb type and species specificity
reside in the germ layer called
LSE-6 4
A2. Diflerentiate between any two of the following : 7x2:2
(i) Morula and Blastula
(iil Invaginationand Evagination
(iiil and Spermiogenesis
Spermatogenesis
LSE-6 P.T.O.
SECTION B
Note : Answer any four questions.
Bl. Write short notes on any two of the following : 2|x2=s
(a) Secondaryinduction
(b) Neurulationin Chick
(c) Neoteny
82. Explain any two embolic types of morphogenetic
movementsduring gastrulationand draw their diagrammatic
representations.
s
83. Explain the origin and migration of primordial germ cells
(PGC) in frog with suitablediagrams.
s
84. List any five similaritiesin the metamorphic-process
of
amphibiansand insects. s
85. Discussthe role of Iree radicalsin the processof aging.
s
86. Briefly describe any tutoof the following :
2lr2:S
-
2"-
(i) Tumour suppressorgenes
(ii) Implantation of the human embryo
(iii) Regenerationin Hydra
LSE-6
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LSE-6 P.T.O.
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LSE-6 10
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LSE-6 12 4,000
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 2006
L IF ES C IE N C E
LSE-7 : TAXONOMY AND EVOLUTION
Time: 2 hours Maximum Marks: 50
Note : This question pqper consisfsof three SectionsA,
B and C. Answer the questionsas directed under
each section. Draw neot and lobelled diagrams
whereuer necessarv.
SECTIONA
, Note : Answerall the questions.
Al. Fill in the blanks: 7x2=2
(i) All vertebrate embryos first develop a -
type of kidney.
(iil Mutations resulting from the addition or deletion of
base pairs are called mutations.
LSE-7 P.T.O.
42. Write True for correct and Folse for incorrect statemenrs:
7x2:2
(i) Darwin and Wallacewere the co-authorsof the book
"Origin of Species".
(ii) Various geographicalregions have their own typical
flora and fauna.
A3. Choose the correct alternative from the options given in
parentheses: 7x2:2
(i) Speciation which refers to speciation in populations
separated by space is called (Sympatric
speciation,/Allopatric
speciation).
(ii) The keys based on the phylogenetic relationship
betweenvarioustaxa are (Naturalkeys,/Artificialkeys).
. A4. Which tuso of the following pairs are correctly matched ?
7x21,
(i) Selection coefficient measureof selection
pressure
(ir) Normalising selection maintainsg"r,"ii.
homeostasis
(iii) Adaptive value selection acting in a
heterogenous
environment
A5. Define the following : 7x2:2
(i) Fossit
(ii) Gene pool
LSE-7 2
SECTION B
Note : Answer any four quesfions.Limit your answer to
750 wordst'or each question.
81. "Systematicbotany is an unending synthesis."Elaborate
this statement in terms of "Anatomv in relation to
Taxonomy".
B,2. Define homologousorgansand give any two examplesfrom
chordates. 7+4:5
[l3. What do you understandby genetic recombination? 5
[l4. Briefly comment on the possible
hominid phylogeny. 5
[l5. Explain co-evolutionof prey - predatorsrelationship. 5
86. How do DNA hybridisation studies help in determining
closeness distantness two species?
or of
LSE-7 P.T.O.
SECTION C
'
Note : Answer any two questions. Limit your answersto
300 words t'or each question.
Cl. Write in detail the significance Darwin's contributionwith
of
respectto organicevolution. 10
C2. What are the different pre-mating isolating mechanisms?
Discussany one of them giving examples. 2+8=70
C3. l'Tool-making and languageskills have played a significant
role in human evolution."Discuss. 10
LSE-7
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LSE-7
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LSE-7 3,000
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 2006
LIFE SCIENCE
LSE-9 : ANIMAL DIVERS|TY-I
Time : 3 hours Maximum Marks : 75
Note : This questionpaper comprisesthree sectionsA, B
snd C. Answer the questions directed under each
as
section.
SECTION A
Note : Answer all questions.
- 41. Choose the correct alternative from -those given in
.
parentheses Ix3:3
(i) Viruses are (cellular/acellular).
(ii) In prokaryotes,Mitochondria are (presentlabsent).
(iii) Flagellated cells of canal system of sponges are
(pinacocytes/choanocytes).
LSE.9 P.T.O.
A2. Fill in the blanks | 7x5=5
(i) The Cell Theory was formulated by
(ii) Trypanosoma gambiensecauses disease'
(iii) Class Calcarea is characterizedby the presence of
spiculesmade uP of - '
(M Excretion in Phylum Platyhelminthes by
is
cells.
(v) The two fused segmentsin millipedes are known as
A3. Name the following : 7x4:4
(i) Feeding on large mass of food'
(ii) Responseto stimuli by complex adaptive activity'
(iii) Class of Phylum Annelida which includesLeech'
(iv) The general category of 'chemicals secreted by
endocrine glands.
(T) or
A4. State whether the following statementsare true
-
(F):
fatse )"A:S
(i) Gastrea was the hypothetical metazoan proposed by
Haeckel.
(ii) Five Kingdom classification was proposed by
Whittaker.
(iii) Crystallinesryleof bivalves digestiveenzymes'
secretes
LSE-9
(iv) ClassArachnidaare regarded living fossils.
as
(v) Tube feet are the locomotory organs ol
Echinodermata.
(vi) Lung flukes are found in India.
LSE-9 P.T.O.
SECTION B
Note : Answer ony six questions.
81. Give the Five Kingdom classificationand assign the
following to their respectivekingdoms :
Yeast, Sponge, Moss, Blue green algae, Tapeworm,
Mushroom,Frog.
82. Name any five parasitic protozoans, and the diseases
causedby them.
83. Draw a labelleddiagram of the male reproductivesystemof
Cockroach.
84. List any five differences in the life-history stages of
Anophelineand Culicinemosquitoes.
of
85. Give any three advantagesand any two disadvantages
social organizationin insects.
86. Give one reason why asexual reproduction is. more
prevalent in lower animal phyla. Write any four ways how
asexual reproduction is advantageous to the animals. 1+4:5
87. Give the classification Phylum Platyhelminthes
of with one
representativeof each Class. Explain very briefly the type
of nervoussystemin Platyhelminthes.
88. What is coelom ? Give an account of the two types of
coelom.
LSE-9
SECTION C
Note : Attempt any three quesfions.
- Cl. List the three theories about the origin and evolution of
Metazoa.Describe briefly any two of these. 3+7:70
C2. Discussthe three common types of coral reefs. How are
patch reefs different from the others ? 9+1=70
C3. Give a detailedaccountof the adaptiveradiation pertaining
to respiration in Arthropoda. 10
C4. Discussmetamerismin non-chordates. 70
C5. Name the two kinds of molluscsthat produce pearls.
Describe how a pearlis produced. 10
with the help of diagrams
LSE-9
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LSE-9 11 3,000
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BACHELOR OF SCIENCE (B-Sc.)
Term-End Examination
June, 2006
LIFE SCIENCE
L S E - 1 0 : A N I M A L D I V E R S I T Y- l l
T i m e: 3 h o u r s Maximum Marks : 75
Note : The questionpaper consistsot' three sectionsA, B
and C. Answer the questionsas directed in each
Whereuer
section. needed,supportyour answerwith
diaqrams.
SECTION A
- Note : Answer all the questions'
. Al. Fill in the blanks : 7x5=5
(i) Protostomes are the animals in which mouth arises
from the
(ii) Dipnoi include the three surviving genera today,
and
namely Lepidosiren, Neoceratodus
I
t- LSE-10 P.T.O.
I
I
(iii) Alligators and Gharialsbelong to the Order _ .
(iv) Monotremata are the most primitive members of
(v) Scales of teleost fishes are of two types, namely,
cycloid and -- .
42. Write True (T) for correct statementsand Folse (F) for
incorrect statements. lxS:S
(i) Reptilesfeedby filter feedingmechanism.
(ii) External respiration is the utilization of oxygen for
oxidation of nutrients in cells and tissues.
(iii) Amniotes have double blood circulation pattern in
which blood passestwice through the heart.
(iv) Protonephridia, the organs of excretion in
Branchiostoma,are ectodermal origin.
in
(v) Central nervous system consistsof brain, spinal cord
and cranial nerves.
A3. Matchthe itemsgivenin ColumnI with thoseof Column II.
1,x5=5
Column I Column II
(i) Skull (a) Relaxin
(ii) Gonadal hormone (b) Craniata
(iii) Animal behaviour (c) Animalsocieties
(iv) Altruism (d) Ethology
(v) Pteridines (e) Yellow colour
LSE- O
1 2 -t
SECTION B
Note : Answer any six questions.
B1. (a) List any five points of difference between
chordates
and invertebrates.
T
(b) Draw a schematicdiagram showing
four distinctive
characters of chordata.
zlxz=s
; B.2. (a) List any five characteristics birds.
of
(b) Mention five types of featuresfound in modern birds.
zlx2:s
83. (a) Name the four successivelayers present in the
integumentof mammals.
(b) Explain the process of Keratinizationin
terrestrial
vertebrates.
84. (a) What are gills ?
(b) Mention their two types.
(c) Explainthe ways in which a giil runctions.
l+iis=s
85. Draw the labelleddiagramsof the following :
2)xZ:s
(a) Somaticsensoryneuron
(b) Somaticmotor neuron
LsE-10
P.T.O.
on the basis
86. (a) List the five types of vertebraeclassified
of the centrum'
(b) Draw a labelleddiagram of a typical vertebra "t
"Lr=U
zZ^z
87. (a) Explainthe term "Animal behaviour"'
? 2+3=5
(b) Why is it important to study animal behaviour
in animals ?
n8. (a) Wfrat is meant by social organization
2+3-5
(b) Discuss benefitsand costsof sociality'
the
following : Zlx2=5
89. Write short notes on any tuto of the
(a) SubclassElasmobranchii
(b) Digestivesystemof amphibians
parts through
(c) Structureof vertebrateeye and labelthe
which light rays pass into the retina
(No descriPtionis needed)
O
LSE-1 4
SECTION C
.
Note : Answer any three questions.
Cl. Discuss
the ancestory
and evolutionof birds. 10
^' e2. Compare the venous system of amphibians with that of
reptiles. 10
C3. With the help of suitablediagrams,describethe location,
structureand function of pituitary gland in humans. i6
C4. Write an essay on the importance of colouration in
vertebrates. 70
C5. How have mammals successfully
adapted to their life on
land ? 10
LSE-1O
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LSE.1
O 11 3,000
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BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 200,6
LIFE SCIENCE
LSE-12 : PLANT DIVERSITY-I
Time : 3 hours Maximum Mqrks : 75
Note : Answer the questions directe) in SectionA, B
as
and C. Drqw neat qnd labelleddiaqramswhereuer
necessarv.
SECTIONA
Note : AII the questions this sectionare compulsory.
in
Al. Fill in the blanks, 7x5:5
(i) A colony of Voluox with cells arranged in a specific
manner is called a
(ii) The male and female sexual reproductive bodies in
Ascomycetesare called antheridia and -
respectively.
LSE-1
2 P.T.O.
(iii) plays an essential role in bringing
about fertilizationin Bryophytes.
(iv) In Pteridophyteswhen the phloem is on both external
and internal surfacesof xylem, this type of stele is
called
(v) The Five-Kingdom classification was proposed by
A2. Indicate which of the following statementsare true or
false : 7x5:5
(i) Cyanophyta are prokaryotes.
(ii) Chlamydospores perennatingspores.
are
(iii) Red snow is causedby red algae.
(iv) The elatersare formed from sporogenouscells.
(v) The genus Equisetum is commonly known as
horsetails.
A3. In the following statements,choose the correct alternative
word given in parentheses. 1x5:5
(il The life cycle of I)lua shows
(isomorphic/heteromorphic)
alternationof generations.
(ii) Viruses infect other organisms and reproduce
themselves(outside/inside) host cells.
the
(iii) Fungi are (achlorophyllous/chlorophyllous)
organisms.
LSE-12
In Pellia the antheridia are present on the
(dorsal/ventral)surface of the thallus in antheridial
cavities.
ln Psilotum each fructificationrepresents group of
a
(two/three) fused sporangiacalledsynangium.
LSE-1
2 P.T.O.
SECTTON B
Note : Answerony six questions.All questionscarry equal
marks.
diagram describebriefly the
Bl. With the help of a well-labelled
ultrastructureof a cvanobacterialcell. 5
82. Describesexualreproduction Neurosporc.
in 5
[}3. Write briefly the economicimportanceof lichens. 5
84. Draw neat and labelled diagrams of any two of the
following ' Z1*Z=S
(i) Vegetativestructureof Ulothrix
(ii) L.S. capsuleol Funaria
(iii) V.S. leaf of wheat passingthrough uredosorus
(iv) L.S. strobilus Selaginella
oI
85. Match the following given in Column A with those given in
Column B : 1x5:5
Column A ColumnB
(a) Late blight of potato (i) Xanthophyta
(b) Ectocorpus (ii) Cyanobacteria
(c) Yellow-green
algae (iii) Pucciniatritici
(d) Black rust (iv) Phaeophyta
(e) Phycocyanin (r) Phytophthora inJestons
LSE-12 4
86. What are slime moulds? Write a note on their veqetative
phase.
87. Compare the characteristics of bryophytes with
pteridophytes.
88. Describethe strobilus Equisetum.
of
89. Discuss
the reproductive
structures Mqrchantia.
oI
LSE-1
2 P.T.O.
SECTION C
Nofe : Answer any thtee questions. AII questions carry
equal marks.
Cl. What are fossils? How are they formed ? 10
the economicimportanceof Algae'
C2. Discuss 10
c3. with the help of welllabelled'diagrams the
describe disease
cycle of late blight of potato or Puccinia graminis' Also
give the control measures' 10
C4. Give a brief account of various usesof Bryophytes' 10
C5. Illustratethe life cycle of a typical pteridophyteand describe
its featuresin detail. 70
2
LSE-1
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LSE-1
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 2006
LIFESCIENCE
LSE-13 PLANT
: DIVERSITY-II
T i m e: 3 h o u r s MaximumMarks: 75
Note : Answer the questionsas directed in SectionsA, B
and C. Drqw labelleddiagrams,whereuer necessqry.
SECTION A
Note : Answer aII questions.
Al. Fill in the blank(s)
with the appropriateword(s): 7x5:5
(i) The oil of Cedrus deodarqis usedin and
(ii) A modified stem can be recognised by the presence
of-and-.
(iii) Saffron is obtained from the of the
flower.
LSE-1
3 P.T.O.
(iv) In aquaticplants aeration and buoyancyis providedby
tissue.
(v) The botanical term for the fruit of pomegranate is
42. Explain each of the followingin one or two lines : 7x5:5
(i) Albuminouscell
(ii) Sessileleaf
(iii) Tetradynamousandroecium
(iv) Phylloclade
(v) Pseudostem
A3. Answer each of the following in a few words : 7x5=5
(il Name a gymnosperm whose pulp is used for
manufactureof superior quality paper.
(ii) Name the gymnospermwhich is referredto as "big
lree" .
(iii) Name the family which is considered be the largest
to
amongstthe dicotyledons.
(iv) What is the term usedfor the plants that rely on birds
for pollination ?
(v) Write the botanicalname the plant from which drug
of
is obtained for the treatment of malaria.
LSE-13
SECTION B
Note : Answer only six questions. AII questions cq.rry
equal marks.
B1. Enumerate the differencesbetween monocot and dicot
stems.
82. Why are the cycadsconsidered living fossils?
as s
83. With the help of labelleddiagramsonly depict the life-cycle
of Pinus. s
84. Describe the various forms of sclereids with suitable
examples of each.
85. Summarize the various theories which explain the
morphological nature of carpel.
. 816. Write a general account of the botanv of wheat or maize
plant.
87 . Differentiatebetweenany two of.the following 2|x2:5
(i) Vegetative
shoot apex and Floweringapex
(ii) Essential and Vegetable
oils oils
(iii) Sapwoodand Heartwood
88. Write short notes on any two of the following :
2|x2:s
(i) Economic uses of gymnosperms
(ii) Specialized stems
(iii) Seed appendages
LSE-13 3 p.T.O.
sEcTtoNc
Note : Answer ony three questions.AII questions carry
equal marks.
Cl. Angiosperms the most widelyspreadgroup in the plant
are
kingdom.Justifywith suitableexamples. 10
C2. Give a detailedaccountof the origin, cultivation,usesand
breedingprogrammesof rice. 10
Ca. (i) Differentiateaberry from a drupe.
(ii) Describe the botanical features, ecology and uses of
mango. 4+6=70
C4. (t List any five spicesalong with their botanicalnames,
families and plant part used.
(ii) Describecultivationand usesof any two spicesof your
choice. 5+5:70
C5. (i) Enlist the field recognitioncharactersand comment
on the morphologicaldiversity familyAsteraceae
of or
Euphorbiaceae. 6
(ii) Compare the diagnosticfeaturesof Malvaceaeand
Rutaceae. 2
(iii) Describethe structuraldiversityof family Palmae. 2
LSE-1
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