Madhyamik Life Science Question Paper 2022
Madhyamik, the Class 10 School leaving examination, is conducted by the West Bengal Board of Secondary Education (WBBSE). The examination is held in the month of March 2022. Each paper started on each day from 11.45 A.M to 3.00 P.M
Students can download the syllabus and the model question papers from the official website of West Bengal Board of Secondary Education. Here is the link is provided http://www.wbbse.org/.
Having the knowledge of previous years question papers of Madhyamik Pariksha is essential for achieving the best performance. At the Vision Success (website), you can view or even can downloaded in PDF form, the previous year question papers. This post provides you the Madhyamik Life Science Question paper 2022
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Madhyamik Question Paper 2020 | |
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Life Science 2022 |
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Life Science 2022 | |
Solved Part | |
Vision Success
West Bengal Board Secondary Education
ENGLISH
VERSION
DIRECTIONS
For
Regular candidates, the questions of Group ‘A’, ‘B', 'C' and 'D' will have to
be answered.
Special
Instruction for Sightless Candidates
In Group
'D' instead of Question No. 4.1, 4.1(A) will have to be answered.
For
External Candidates, the questions of Group “E' will also have to be answered
in addition to Group ‘A’, ‘B’, “C” and ‘D'.
Instructions regarding the number of questions to be attempted have been indicated at the beginning of each group.
GROUP_'A'
(Answer to all questions is compulsory)
1.
Write the answer in a complete sentence by
choosing the correct answer for each question with respective serial number. 1
x 15 = 15
1.1.
Select the correct pair ----
(a) Sclera-Absorbs
excess light within eyeball
(b) Choroid—Provides
definite shape of the eyeball
(c) Lens—Causes
refraction of light and accomplishes accommodation
(d)
Retina-Holds the lens with the help of the suspensory ligaments
1.2 Identify
which of the following statements is not true regarding Adrenaline —
(a) Increases
the rate of heartbeat
(b)
Helps in the production of spermatozoa during adolescence
(c) Increases
cardiac output
(d) Increases
systolic blood pressure
1.3 Select
which of the following is the feature of tropic movement -
(a) Induced
movement of curvature of particular parts of plant controlled by the direction
of the stimulus
(b) It
is one type of turgor movement
(c) Induced movement of curvature of particular
parts of plant controlled by the intensity of the stimulus
(d) Does
not occur under the influence of Auxin
1.4
Match the words of Column-A with that of Column-B and select which is the following
options is correct —
|
Column-A |
Column-B |
||
|
A |
CSF |
i |
Protects
Central Nervous System from mechanical injury |
|
B |
Meninges |
ii |
Helps
in the formation of myelin sheath |
|
C |
Neuroglia |
iii |
Acts
as shock absorber |
(a)
A-(ii) B-(iii) C-(i)
(b)
A-(iii) B-(i) C-(ii)
(c)
A-(i) B-(ii) C-(iii)
(d)
A-(i) B-(iii) C-(ii)
1.5
1.5 Decide
which of the following sequence is correct -
(a)
Receptor + Effector → Sensory Nerve → Motor Nerve → Nerve Centre
(b)
Receptor → Nerve Centre → Motor Nerve → Sensory Nerve → Effector
(c)
Receptor → Sensory Nerve → Nerve Centre → Motor Nerve → Effector
(d)
Receptor → Motor Nerve → Effector → Sensory Nerve → Nerve Centre
1.6 Select
the correct pair -
(a)
Telophase --- Movement of daughter chromosomes towards poles
(b)
Telophase --- Disappearance of Nuclear Membrane and Nucleolus
(c)
Telophase — Formation of spindle fibre
(d)
Telophase — Reappearance of Nuclear Membrane and Nucleolus
1.7 The
name of terminal parts of Chromosome is —
(a)
Centromere (b) Telomere (c) Nucleolar Organizer (d) Satellite
1.8 Identify
which of the following statements is not true regarding cross pollination —
(a)
Requires agent (b)
Origin of new hereditary features
(c)
Maintains the purity of species (d)
Rate of germination of seeds is higher
1.9 Consider
the differences between asexual and sexual reproduction and so which of the
options is/are correct
|
Asexual
Reproduction |
Sexual
Reproduction |
|
|
I |
Requires
two parental organisms of opposite sex belonging to same species. |
Offsprings
can be formed from a single parental organism. |
|
II |
This
type of reproduction is completed through cell division or through the
production of spores. |
This
type of reproduction is completed through the production of gametes and their
union. |
|
III |
Depends
on amitosis, mitosis and meiosis. |
Depends
on meiosis. |
|
IV |
Variations
are found in offsprings. |
The
offsprings become identical to their parents. |
| (a) I,
IV (b) II, III (c) III, IV (d) I, II
1.10
Select the correct pair in case of human:
(a)
Normal pattern of chromosome of ovum — 22A + XX
(b)
Normal pattern of chromosome of ovum — 22A + Y
(c)
Normal pattern of chromosome of ovum — 22A + X
(d)
Normal pattern of chromosome of ovum — 22A + XY
1.11
Determine which of the following genotypes is homozygous loci —
(a) BbRr (b) BBRr (c) BERR (d)
bbrr
1.12
Identify the genotype of guineapig having white coat colour and rough hair —
(a)
bbRR, bbrr (b) BBRR, bbrr
(c)
bbRR, bbRr (d) BbRr, BbRR
1.13
Decide which of the following two were selected by Mendel as dominant traits —
(a)
Length of stem — Long, Shape of seed — Round
(b)
Position of flower — Terminal, Colour of flower — White
(c)
Colour of cotyledon — Green, Shape of seed — Wrinkled
(d)
Length of stem — Dwarf, Shape of seed — Wrinkled
1.14
Determine the nature of pea plant germinated from the seed produced as a result
of pollination between a hybrid tall (Tt) and a pure dwarf (tt) pea plant —
(a) 100%
Tall (b) 50% Tall, 50% Dwarf
(c) 100%
Dwarf (d) 75% Tall, 25% Dwarf
1.15 Decide
which of the following diseases can be prevented by taking suggestions from
pre-marital genetic counseling ----
(a)
Goitre (b) Malaria (c) Thalassaemia (d) Tuberculosis
GROUP_'B'
2.
Answer 21 questions out of 26 questions given
below as instructed. 1 x 21 = 21
Fill in
the blanks with proper words in the following sentences (any five): 1 x 5 = 5
2.1
________ hormone is found in very high amount in the ripe seeds - of plants.
2.2 Reflex
action is fast, spontaneous and __________
2.3 In _______
cell division spindle fibres are not formed.
2.4 ___________
is an entomophilous flower.
2.5 The
gene having the power of rolling tongue is _________
2.6 As
the gene responsible for haemophilia is recessive, so the symptoms of this
disease is only manifested in _________ condition.
Decide
whether the following statements are true or false (any five): 1 x 5 = 5
2.7 The
focal length of lens increases in case of seeing distant objects.
2.8 Each
nucleoside contains nitrogenous base and phosphoric acid.
2.9.
There is no role of female in determining sex of human.
2.10 If
any pea plant contains either TT or tt trait, then the pea plane heterozygous
with respect to such alleles.
2.11 As
the flowers of pea plant are unisexual, so self-pollination and if needed, cross
pollination can be performed.
2.12 The
daughter cells are changed and modified in different ways during cell differentiation
phase to form tissue, organ and system.
Match
the words in Column-A with those which are most appropriate in Column-B and
re-write the correct pair mentioning the serial no. of both columns (any five): 1 x 5 = 5
|
Column-A |
Column-B |
||
|
2.13 |
Diabetes
insipidus |
A |
Law of
Independent Assortment |
|
2.14 |
Schwann
cell |
B |
Brittleness
of bone |
|
2.15 |
Meiosis |
C |
Exists
between neurolemma and myelin sheath of axon |
|
2.16 |
Senescence
phase |
D |
Hyposecretion
of ADH |
|
2.17 |
Genetic
disease |
E |
Spore
mother cell and germ mother cell |
|
2.18 |
The
second law of Mendel |
F |
Colour
blindness |
|
|
|
G |
Law of
Segregation |
Answer in a single word or in a single sentence
(any six): 1 x 6 = 6
2.19 Choose the odd one and write it:
Olfactory
nerve, Vagus nerve, Optic nerve, Auditory nerve
2.20 What is the fate of hormone in animal body
after its function is over?
2.21 A pair of related terms is given below. On
the basis of the relationship in the first pair write the suitable word in the
gap of the second pair.
Purine :
Adenine :: Pyrimidine : __________
2.22 What happens if the functions of
checkpoints in cell cycle get hampered?
2.23 What is hybridization?
2.24 What is dominant trait?
2.25. Among the following four terms, one
includes the other three. Find it out and write it:
Increase
in Basal Metabolic Rate, Thyroxine, Gradual maturation of Red Blood Corpuscle,
Exopthalmic Goitre
2.26 In which phase of Interphase the proteins
essential for the formation of spindle fibres is synthesized?
GROUP-'C'
3. Answer any 12 questions in 2-3 sentences out
of 17 questions given below: 2 x 12
= 24
3.1 Prepare a list of hormones which control
the following functions ----
·
Causes increase in the length of bones through mineralization
of the matrix of cartilage located at the terminal parts of long bones.
·
Transforms ruptured follicle into a temporary
endocrine gland namely Corpus luteum and provides necessary stimulation for the
secretion of Progestrone hormone from that gland.
·
Inhibits the production of glucose in liver
from protein and lipid.
·
Cause's Contraction of uterine muscles during
parturition.
3.2 Explain the causes of Myopia and Hyperopia.
3.3 Explain what phenomena happen when the
following muscles contract:
·
Flexor muscle
·
Extensor muscle
·
Abductor muscle
·
Rotator muscle
3.4. Prepare a list of functions controlled by
Auxin related with the growth of plants.
3.5 Distinguish
between the mitosis of plant cell with the mitosis of animal cell on the basis
of the following features —
·
Formation of spindle fibres
·
Process of cytokinesis
3.6 Explain how Bryophyllum undergoes
vegetative propagation with the help of adventitious bud.
3.7 Tabulate which changes occur in a
chromosome during Anaphase of Karyokinesis.
3.8 Describe how Yeast completes the process of
budding.
3.9 Prepare a list of changes which occur
during the adolescence phase of human development.
3.10 Explain the following two significances of
meiotic cell division —
·
Maintains the constant number of chromosome in
a species
·
Origin of variation in an organism
3.11 State Mendel's second law of heredity.
212. Prove the authenticity of the statement —
"The phenotypic and genotypic ratio remain identical in case of Incomplete
Dominance".
3.13 Write two causes behind Mendel's success
in conducting heredity.
3.14 "Dispersal of animals is one of the
driving force of locomotion" — Judge the statement with the help of proper
examples.
3.15 Show the chemical constituents of
chromosome with the help of a table.
3.16 Compare between DNA and RNA on the basis
of following features -
·
Nature of carbohydrate
·
Nature of pyrimidine base
3.17 "Some phenotypes may have multiple
genotypes and some other phenotypes may have a single genotype" — Justify
the statement from the results derived from the dihybrid experiment in case of
pea plant.
GROUP -
'D'
(Long
Answer Type Questions)
Write
the 6 questions or their alternatives given below. Sightless candidates have to
answer question No. 4.1(A) instead of question no. 4.1 the marks allotted for
each question is 5 (the division of marks is 3 + 2, 2+3 or 5): 5
x 6 = 30
4.1 Draw a scientific diagram of a neurone and
label the following parts: 3
+ 2 = 5
(a) Axon (b)
Node of Ranvier (c) Dendron (d) Schwann Cell
OR
Draw a scientific diagram of the morphological
structure of an eukaryotic chromosome and label the following parts —
3 + 2 = 5
(a) Chromatid (b)
Telomere (c) Centromere (d) Nucleolar Organizer
(FOR
SIGHTLESS CANDIDATES ONLY)
4.1 (A)
Write the functions of each of the following part of a neurone: 1 x 5 = 5
(a) Dendron (b)
Axon (c) Myelin Sheath (d) Schwann Cell (e) Node of Ranvier
OR
Write the functions of the following structural
parts of an eukaryotic chromosome: 1
x 5 = 5
(a) Centromere (b)
Nucleolar Organizer
(c) Chromatid (d)
Telomere (e) Kinetochore
4.2 Compare the antagonastic functions of the
following three pairs of in human body:
·
Insulin and Glucagon
·
Estrogen and Progesterone
·
FSH and LH
Explain the relationship between hind brain and
the function of contro breathing mechanism. 3 + 2 = 5
OR
The following physiological functions of a
person wounded in an accident are found hampered. Write the name of the parts of
brain attached with those functions:
·
Speech
·
Hunger, thirst and sleep
·
Posture and the equilibrium of the body
·
Movement of tongue and swallowing of food
Explain the mechanism of feedback control of
function of hormone with the help of a suitable example. 3
+ 2 = 5
4.3 Prerpare a list of role of artificial plant
hormones in agriculture and horticulture. What are the influences of Insulin
hormone on the absorption and metabolism of glucose in human body ? 2+ 3 = 5
OR
Write three differences between binocular
vision with that of monocular vision on the following three aspects :
·
Formation of image
·
Field of vision
·
Depth
Write
the differences between inborn and acquired reflex actions on any two of the
following.
·
Nature
·
Condition
·
Prior experience
·
Neural pathway 3+2=5
Show the
alternation of generation in fern with the help of a word diagram. 5
OR
Show the
process of sexual reproduction in flowering plants with the help of word
diagram. 5
4.5
Distinguish between Mitosis and Meiosis on the basis of the following three
aspects
·
Site of occurence
·
Nature of division of chromosome
·
Number of cells produced Explain the following
phenomena related with meiotic cell division
·
Separation of chromosome and chromatid
·
Crossing over 3
+ 2 = 5
OR
Distinguish
between the cytokinesis of plant cell with the cytokinesis of animal cell on
the basis of the following aspects:
·
Process
·
Time of initiation
·
Role of Golgi bodies
Establish
the interrelationships among gene, DNA and chromosome. 3 + 2 = 5
4.6
Predict what would be the hereditary results in the following cases:
·
One of the parents is thalassaemic and the
other is carrier of thalassaemic gene.
·
Both of the parents are carrier of thalassaemic
gene
What are
the symptoms of Thalassaemia? 2
+ 3 = 5
OR
Tabulate
three pairs of opposite traits regarding seed of pea plant as selected by
Mendel. Show the process of sex determination in man with the help of a checker
board. 3+2
= 5
GROUP—'E'
(For
External Candidates Only)
5.
Answer any four questions: 1
x 4 = 4
5.1
Write a feature of connective tissue.
5.2
Which cell organelle is termed as "power house" of cell?
5.3
Write a function of Collenchyma tissue.
5.4 Give example of an ornithophilous flower.
5.5 Give
example of an amylolytic enzyme.
6. Answer
any three questions 2 x 3 =
6
6.1 Name
any two structural parts of Neurone.
6.2
Write the name of two non-nitrogenous excretory products of plant. 6.3 Write
one function each of ribosome and lysosome.
6.4 Name
two endangered animals of West Bengal.