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Guess Paper – 2010
Class – X
Subject – Biology
Time Allowed – 1Hr 30 Min
M.M. 80
Section I
(Compulsory :- Attempt all
question from this section)
Q.No.
1
(a) Name the following –
(5)
(i) Type of immunity which a
child develops since birth.
(ii) Fluid Filled in the
internal ear.
(iii) Surgical removal of
testes from a male.
(iv) A disease caused due to
hyposecretion of insulin in man.
(v) Phase of photosynthesis in
which H2O is oxidized.
(b) Here are given few words,
arrange them in a proper sequence in regard to what is given
within brackets. (5)
(i) Cortex, Root hair,
Endodermis, Xylem, Soil water (Pathway of water
absorption).
(ii) Telophase, Prophase,
Cytokinesis, Anaphase, Metaphase (Stages of Cell division)
(iii) Stoma, Water Vapors,
substomatal space, Xylem (Pathway of
transpiration).
(iv) Photolysis,
Photophosphorylation, Absorption of sunlight, Reduction of
CO2, Polymerisation (Sequential events during photosynthesis).
(v) Cornea, lens, pupil,
aqueous humour, Conjunctiva, Retina (Pathway
of light).
(C) The Paragraph given below
is concerned with a reflex arc. Copy it and complete it by
filling the words given in the box. (5)
The reflex actions are
controlled by the spinal cord, In a reflex are the ________
from receptor is carried through ________ neuron, to the
spinal cord. The sensory neuron enters spinal cord through
________ root. The impulse of reflex travels through _______
neuron which leaves from spinal cord by ________ root and
reaches to effector.
(d)
The figure given here is of an endocrine gland. See it
carefully and answer these questions.
(5)
(i) Indentify the gland.
(ii) Lable the parts 1 and 2.
(iii) Name one hormone
secreted from part 1 and 2 each.
(iv) why it is known as a
gland of emergency?
(v) what will happen if it is
removed from the human body?
(e) Answer the following
questions – (5)
(i) Define Genetics
(ii) Who is father of
Genetics?
(iii) What do you understand
from gene?
(iv) What do you understand by
allele?
(v) Write one difference in
between sex chromosomes and autosomes.
(f) Give one difference in
between the following pairs on the basis of
what is given in the
brackets.
(5)
(i) Homologues – Heterololgus
Chromosome (Nature)
(ii) Brain – Spinal cord
(Position of white Matter)
(iii) Pure line – Hybrids
(Definitions)
(iv) Antibodies – Antibiotics
(Mode of Production)
(v) Natality – Mortality
(Definitions)
(g) Match the items given in
column I with these given in column II. (5)
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Column I
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Column II
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1.
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Imbibition
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a.
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Nourishment of sperms.
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2.
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Green plants
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b.
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Neurotronmitter
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3.
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Sartoli
Cells
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c.
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Lacrymal
glands.
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4.
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Lysozyme
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d.
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Autotrophs.
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5.
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Acetylcholine
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e.
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Surface attraction
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(h) Write the location and
function of following structures. (5)
Structures
Location
function
1.
Lenticels
_______ _______
2. Eustachian
Canal _______ _______
3. Inguinal
Canal. _______ _______
4. Fimbrae.
_______ _______
5.
Amnion
_______ _______
SECTION II (40 Marks)
(Attempt any four questions from
this section)
Q.No.
2
(a) Define the following terms
– (5)
(i) Diapedisis.
(ii) Insemination.
(iii) Osmosis.
(iv) Leydig Cells.
(v) Photophosphorylation.
(b) Here is given diagram of
human eye as seen from front under
Different conditions. See
it carefully and then answer the following
questions-
(5)
          
(i) Give the reason for
change occurring from A to B.
(ii) What is the reason that
choroid is thick and dark coloured?
(iii) What do you understand
by Accomodation of Eye?
(iv) Name the two special
types of cells found in retina.
(v) What is the function of
suspensory ligaments which hold the lens of
Eye?
Q.No.
3
(a) With reference to the process
of photosynthesis, answer the following-
(i) Photolysis of
H2O
(1)
(ii) Polymerisation.
(1)
(iii) Two factors which affect
the rate of photosynthesis. (1)
(iv) Draw a line diagram to
show dark reaction of photosynthesis. (2)
(b) Write short note on the
following- (5)
(i) Transpiration pull.
(ii) Guard cells.
(iii) Guttation.
(iv) Stoma.
(v) Antitranspirants.
Q.No.4
(a) Complete the following
table - (5)
Gland Secretion
Funtion
1. ___A____
Thyroxine ____B___
2. ___C____
___D____ Increases heart beat
3. Anterior pituitary
___E____ ____F___
4. ß – Cells
___G____ ____H___
5. ___I____
Oxytocin ____J___
(b) Draw a well labeled figure
of human female reproductive system
And lable the folling
parts-
(i) Site of ovum production
(2 + 3 = 5)
(ii) Site of fertilization.
(iii) Site of implantation.
Q.No.
5
(a) (i) In a certain species of
animal black fur (B) is dominant over brown fur
(b). Predict the genotype
and Phenotype of their off springs. When both
the parents are “Bb” or
heterozygous for black fur. (3)
(ii) Cat and Tiger both have 19
pairs of chromosomes but even then they are
Different from each other
why? (1)
(iii) Write two dominant and
recessive characters of Pisum sativum which
were chosen by Mendel for
his experiments. (1)
(b) Here is
given a figure to show a stage of
cell division. Recognize it
and answer the following
question.
(i) Name the type of cell
division in which it occurs. (1)
(ii) Define the process shown
in this figure. (2)
(iii) What is the significance
of this process? (1)
(iv) Differentiate in
cytokinesis of a plant cell and animal cell. (1)
Q.N0. 6
(a) Give suitable explanation
for the following statement- (5)
(i) We gargle with saline
water during throat infection.
(ii) Rate of transpiration
will be low on a calm day.
(iii) Chloroplasts are
considered as energy converters.
(iv) Fossil fuels are non
renewable resources.
(v) Human females have two
ovaries but often only one zygote in formed
at a time.
(b) Give the adaptability in
the following which facilitates a particular
Process given in the
brackets.
(5)
1.
Centriole
(for Karyokinesis)
2.
Root hair (for
absorption of H2O)
3.
Ear (for balancing
the body)
4.
Cuticle (for
photosynthesis)
5.
Testes out side the
abdomen (Spermatogenesis)
Q.No.
7
(a) Give the scientific term
for the following – (5)
(i) condition of a cell in
which it cannot accommodate any more water.
(ii) Surface of Neuron which
Lacks myelin sheath.
(iii) Part of brain which acts
as thermostat of body.
(iv) The genetic material
found in gene.
(v) Damage of photosynthetic
apparatus when light of very high intensity
falls on it.
(b)
(i)
Here
is given a symbol, name the organization to which it is
used as emblem and write two
activities of it. (2)
(ii)
Hear
is given a symbol, for which purpose it is used in
INDIA. Name two surgical methods
used by male and
female to prevent
fertilization. (2)
(iii) Differentiate in between
conditioned and simple reflexes. (1)
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