(Attempt all questions from this section)
Question 1: (15)
Select the correct answer to the questions from the given options :
(Do not copy the question, write the correct answers only)
i) The sex chromosome in human ovum is:
a) X chromosome
b) Y chromosome
c) both X and Y chromosome
d) either X or Y chromosome
ii) Which one of the following is a biodegradable waste ?
a) metal cans
b) E-waste
c) Plastic d) flowers
iii) The heart sound 'Dup' is produced when:
a) semilunar valves open
b) Atrio ventricular valves close
c) semilunar valves close
d) Atrio ventricular valves open
iv) Deplasmolysis occurs a plasmolysed cell is placed in:
a) Concentrated salt solution
b) tap water
c) concentrated sugar solution
d) hypertonic salt solution
v) Alpha cells of pancreas secrete:
a) glycogen b) glucose c) glucagon d) insulin
vi) Haploid number of chromosomes are found in:
a) nephrons b) neurons c) skin cells d) sperms
vii) The lifespan of an RBC is:
a) 120 days b) 220 days c) 20 days d) 2 weeks
viii) The statistical study of human population is called:
a) Mortality b) Demography c) Natality d) Equality
ix) The pale yellow colour of normal human urine is due to the pigment:
a) melanin b) anthocyanin c) Urochrome d) haemoglobin
x) Stimulation of nerves of the sympathetic nervous system:
a) accelerate heartbeats b) constricts pupil of eyes c) increase perstalsis d) retards heartbeat
xi) The site of the light reaction in the cells of a green leaf is:
a) nucleus b) grana of chloroplast c) Cytoplasm d) stroma of Chloroplast
xii) The paper used to demonstrate unequal transpiration in a dicot leaf is:
a) filter paper b) litmus paper c) starch paper d) Cobalt chloride paper
xiii) Vitreous humour is present between:
a) Cornea and iris b) lens ayretina c) iris and lens d) cornea and lens.
xiv) oxygenated blood to liver is supplied by:
a) hepatic artery b) hepatic vein c) inferior venacava d) hepatic portal vein
xv) During the synthesis phasr of the cell cycle, more of :
a) RNA synthesized b) RNA and proteins are synthesize c) DNA is synthesized d) glucose is synthesized
Question 2: (5)
i) Name the following:
a) The organelle that forms the aster during the cell division.
b) a genetic disorder in which the blood does not clot.
c) the permanent stoppage of mensuration in human females around the age of 45 years .
d) the openings on the barks of the trees through which transpiration occurs
e) A gaseous plant hormone which promotes ripening of fruits.
ii) Arrange and rewrite the terms in each group in correct order to be a logical sequence beginning with the term that is underlined: (5)
a) snake, rabbit, cabbage, hawk.
b) Xyler, soil water , cortical cells, root hair
c) Receptor , response, effactor, spinal cord,
d) Fovea, lens, corner, conjuctiva.
e) testis, urethra, sperm duct, Epididymis
iii) Match the items given in column I with the most appropriate ones in column II and rewrite the correct matching pairs. (5)
Column I
a) hyposecretion of thyroxine in adults
b) hyposecretion of insulin
c) hyposecretion of growth hormone in childhood
d) hyposecretion of ADH
e) hyposecretion of thyroxine
Column II
i) diabetes insipidus
ii) myxoedema
iii) dwarfism
iv) gympganatism
v) diabetes mellitus
vi) exophthalmic goitre
vii) cretinism
iv) Choose the odd one out from the following terms and the name the category to which the other belong: (5)
a) used bandages , pesticides, face masks, syringes.
b) dust, smoke, carbon monoxide, effluents.
c) uterus, urethra, urinary bladder , Ureter
d) menstrual phase, telophase , follicular phase, luteal phase
v) State the exact location of the following structures : (5)
a) Thyroid gland
b) Dura mater
c) amniotic fluid
d) papillary muscles
e) islets of langerhans
SECTION B (40 MARKS)
Attempt any four questions from this section)
Question 3
i) Write the overall chemical equation for photosynthesis. (1)
ii) Mention any two function of blood. (2)
iii) Differentiate between Karyokinesis and Cytokinesis. (2)
iv) Excessive use of fertilizers in agricultural fields reduces the yield of crops. Justify the statement. (2)
v) Study the diagram given below and answer the questions that follow: (3)
b) Which plant hormone plays an important role in the above movement ?
c) Complete and rewrite the given statement by filling in the correct terms.
Shoots show positive____ whereas, roots show positive_____
Question 4
i) Expand the abbreviation DNA. (1)
ii) What is Active transport. (2)
iii) Mention the two pairs of nitrogenous bases which pair with each other with hydrogen bonds. (2)
iv) State Mendel's Law of Segregation. (2)
v) Draw a neat labelled diagram of a human sperm. (3)
Question 5
i) Explain the term 'population density'. (1)
ii) Name the two surgical methods of population control. (2)
iii) Mention two factors responsible for the population explosion in India. (2)
iv) Name two resources which come under pressure due to rising population. (2)
v) The diagram given below depicts the climate change on the plant Earth. (3)
Answer the following questions :
a) Name the climatic phenomenon for the increase in Earth's temperature.
b) Mention one reason for this warming.
c) What measure can be taken to prevent this climate change ?
Question 6
i) Define the term transpiration. (1)
ii) State any two adaptation in plants to reduce transpiration. (2)
iii) Mention any two functions of the human foetal Placenta. (2)
iv) What is the significance of the human testis being located in scrotal secs outside the abdomen ? (2)
v) Draw a neat, labelled diagram of Malpighian Capsules. (3)
Question 7
i) What is a reflex action ? (1)
ii) Renal cortex has a dotted appearance and Renal medulla has a striped appearance. Explain . (2)
iii) What are the two functions of cerebellum ? (2)
iv) Distinguish between the semicircular canals and Utriculus based on their function. (2)
v) A potted plant with variegated leaves was kept in dark for 24 hours and then placed in bright sunlight.
Answer the following question. (3)
a) Which aspect of the photosynthesis being tested in the above diagram ?
b) Why was the plant kept in dark for 24 hours ?
c) After the starch test what will be the colour of the yellow and green parts of leaf ? Give reasons to support your answer.
Question 8
i) Define the term mutation. (1)
ii) A pure breeding red flower variety of pea plant (RR) is crossed with a pure breeding white flower variety of pea plant (rr). Draw a punnett square to find out the phenotype and genotype ratio of the progeny belonging to the F₂ generation. (2)
iii) Leaves of certain plants roll up on a hot sunny day. Explain by giving suitable reasons . (2)
iv) What is a semipermeable membrane ? Name the semipermeable membrane present in a plant cell. (2)
v) The diagram below depicts the human heart in one of its phases . Answer the questions that follow: (3)
a) which part of the heart is in the contraction phase ?
b) Give a suitable reason to justify your answer in (a).
c) Distinguish between systole and diastole.
TEST PAPER -2
SECTION -A
(Attempt all questions from this section)
Question 1. (15)
Select the correct answers to the questions from the given options .
(Do not copy the question. Write the correct answer only ):
i) Loss of water as droplets from the hydathodes is called:
a) transpiration b) bleeding c) Guttation d) evaporation
ii) Synthesis phase in the cell cycle is called so, because synthesis of more:
a) glucose b) proteins c) RNA d) DNA
iii) The prime source of chlorofluorocarbon is :
a) vesicular emmission
b) refrigeration equipment
c) sewage d) effluents
iv) oxygenated blood to heart is supplied by :
a) hepatic artery b) coronary artery c) renal artery d) pulmonary artery
v) Assertion (A): There is a frequent urination in summer than in winter.
Reason (R): In summer we lose a lot of water as sweat, so the kidneys reabsorbs more water. Hence , urine formed is less in summer than in winter.
a) both A and R are true
b) both A and R are false
c) A is true and R is false
d) A is false and R is true.
vi) The age restrictions for marriage for boys and girls by law in India is:
a) boys 18 years , girls 21 years.
b) boys 17 years , girls 16 years.
c) boys 21 years , girls 18 years.
d) boys 20 years , girls 17 years.
vii) Hari is fond of watching the fish in an aquarium. so, he set up an aquarium in his house. Along with a number of freshwater fish , he also placed a Clown fish which is a saltwater fish. After a few hours , the Clown fish was found dead and floating on water. This was due to:
a) Endosmosis b) exosmosis c) osmoregulation d) excretion.
viii) The solvent used for dissolving chlorophyll while testing a leaf for starch is:
a) Sodium hydroxide b) lime water c) water d) ethyl alcohol
ix) The structure related to storage and maturation of sperms in a human male is:
a) Epididymis b) epidermis c) epithelium d) endothelium
x) A sequence of DNA has 20 nitrogenous base pairs, of which 100 are Thymine-Adenine pairs. What is the number of Cytosine -Guanine pairs in this sequence:
a) 50 b) 200 c) 100 d) 25.
xi) The stress hormone in plants which functions during a drought is :
a) Auxin b) abscissa acid c) ethylene d) Cytokinesis.
xii) compressed natural gas(CNG ) is proposed to be a better alternative in fossil fuel. Which of the following reasons makes it a better alternative ?
P. Combustion leaves little or no residue
Q. Absence of carbon in CNG
R. easily available
a) only P b) only Q c) only P and R d) only Q and R.
xiii) The ground substance present in chloroplast is:
a) stoma b) stroma c) grana d) thylakoid
xiv) Lata wanted to cross the road. She looked on either side of the road and then walked across to the other side of the road. Which of the following is/are involved in the process described above?
1. Cerebrom 2. cerebellum 3. skeletal muscle 4. Medulla oblongota
a) Only 3 b) only 1 and 3 c) only 1, 3 and 4 d) only 1, 2 and 3
Question 2:
i) Name the following: (5)
a) the respiratory pigment in erythrocytes.
b) The tissue that transports manufactured food from leaves to all the parts of the plant.
c) The type of gene, which in the presence of a contrasting allele, is not expressed.
d) The duct which carries urine from the urinary bladder to outside the body.
e) The collective term for the protective membranes of the brain.
ii) Arrange and rewrite the terms in each group in the correct order so as to be in a logical sequence beginning with the term that is underlined . (5)
a) snake, grass , frog, grasshopper
b) fibrin, thrombin , fibrinogen, platelets
c) endodermis, cortex, xylem, epidermis
d) embryo, foetus , blastocyst, Morule
iii) Fill in the blanks with suitable words: (5)
The technical term for short sightness is (a)_____. This defect is caused because the eyeball is (b)_____ from front to back or the lens is too (c)_____. It can be corrected by using a suitable (d)_____lens. The power of the lens is mentioned in (e)____.
iv) Choose the odd one out from the following terms and name the category to which the other belong: (5)
a) Newspapers, vegetable peels, electric bulbs, animal excreta
b) renal pelvis, renal artery, renal cortex, renal medulla
c) urochrome, urea, keratin, uric acid
d) ADH, TSH, ACTH, NADP
v) Match the items given in column I with the most appropriate ones in column II and rewrite the correct matching pairs. (5)
Column I
a) spinal cord
b) adrenal medulla
c) number of autosomes in man
d) kidney
e) renal cortex
Match II
1. adrenaline
2. 44
3. nephrons
4. 46
5. Thyroxine
6. neurones
7. Cortisones
SECTION B
(Attempt any four questions from this section)
Question 3
i) The gene for red hair is recessive to the gene for black hair. What will be the hair colour of a person if he inherits a gene for red hair from his mother and a gene for black hair from his father ? (1)
ii) State Mendel's Law of Dominance. (2)
iii) What are homologous chromosomes ? (2)
iv) differentiate between phenotype and genotype. (2)
v) draw a neat , labelled diagram of a duplicated chromosome. (3)
Question 4
i) Mention the exact location of Corpus callosum . (1)
ii) What are the two harmons secreted by the Corpus luteum? (2)
iii) differentiate between menarche and the Menopause. (2)
iv) What is the significance of placenta in the growth of foetus ? (2)
v) Draw a neat labelled diagram of a human gamete that has the sex chromosome. Y. (3)
Question 5
i) Explain the term- photosynthesis. (1)
ii) Write the overall chemical equation of photosynthesis. (2)
iii) A potted plant having variegated leaves was exposed to sunlight for 3 hours. One of the leaves was plucked and tested for starch. What will be your observation after the starch test ? (2)
iv) The initial food prepared by a Green plant is A, which is later converted to food B by polymerization. Name food A and food B. (2)
v) study the diagram below and answer the questions that follow: (2)
a) Name the gas released when the setup was placed in sunlight.
b) Give an example of an aquatic plant that can be used in the above experiment.
c) What will happen if a pinch of sodium bicarbonate is added to the water ?
Question 6
i) Give the exact location of genes. (1)
ii) differentiate between Karyokinesis and cytokinisis. (2)
iii) Mention two significant features of the stage anaphase during mitosis. (2)
iv) How many daughter cells are formed at the end of mitosis and meiosis? (2)
v) study the diagram given below and answer the question that follow: (3)
a) Name the phenomenon depicted by the shoot in the above diagram.
b) which plant hormone plays an important role in the above movement?
Question 7
i) What is the scientific name for man ? (1)
ii) What are vestigial organs ? Give one example. (2)
iii) State two structural difference between an artery and vein. (2)
iv) Mention any two features of the Cro-Magnon man. (2)
v) Study the picture given below and answer the questions that follow: (3)
a) Name the category of waste that is being disposed.
b) Give an example of such a waste.
c) Are they hazardous to humans and animals
Give suitable reason to justify your answer.
Question 8
i) Define-- osmosis. (1)
ii) Name the two sensory cells in retina meant for light adaptation. (2)
iii) Mention one function each for ---cerebrum and cerebellum.
iv) State any two objectives of swachh Bharat Abhiyan. (2)
v) Given below is the diagram of human blood smear. Answer the questions that follow: (3)
a) Mention one structural difference between 1 and 2.
b) What is the function of part 3 ?
c) Name the part labelled 4.
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