{"id":2427,"date":"2025-01-16T09:41:53","date_gmt":"2025-01-16T09:41:53","guid":{"rendered":"https:\/\/topperpoint.com\/?p=2427"},"modified":"2025-01-16T09:41:53","modified_gmt":"2025-01-16T09:41:53","slug":"madhyamik-2017-life-science-question-paper-pdf","status":"publish","type":"post","link":"https:\/\/www.reilsolar.com\/ebook\/madhyamik-2017-life-science-question-paper-pdf\/","title":{"rendered":"Madhyamik 2025 Life Science Question Paper | Madhyamik 2025 Life Science Question Paper"},"content":{"rendered":"

Category- A<\/span><\/strong><\/p>\n

1) Complete the sentence by choosing the correct answer to each question and writing its serial number: 1 x 15= 15<\/span><\/strong><\/p>\n

(i) Some flowers bloom after sunrise, but wither with sunset. This is \u2013\u00a0<\/span><\/p>\n

(a) Photonasty,<\/span>
\n(b) Seismonasty,<\/span>
\n(c) Chemonasty,<\/span>
\n(d) Thermonasty.<\/span><\/p>\n

(ii) A person suffering from diabetes mellitus is unable to secrete which of the following hormones in sufficient quantity? \u2013<\/span><\/p>\n

(a) adrenaline,<\/span>
\n(b) insulin,<\/span>
\n(c) thyroxine,<\/span>
\n(d) testosterone.<\/span><\/p>\n

(iii) The part of the human brain associated with the control of ‘physical arousal’ is \u2013<\/span><\/p>\n

(a) Thalamus,<\/span>
\n(b) Cerebellum,<\/span>
\n(c) Hypothalamus,<\/span>
\n(d) Spinal cord.<\/span><\/p>\n

(iv) You see the separation of sister chromatids during a stage of mitosis cell division. The stage is \u2013<\/span><\/p>\n

(a) Prophase,<\/span>
\n(b) Telophase,<\/span>
\n(c) Anaphase,<\/span>
\n(d) Metaphase.<\/span><\/p>\n

(v) Which of the following pairs is correct? \u2013<\/span><\/p>\n

(a) Corygome \u2013 Yeast,<\/span>
\n(b) Fragmentation \u2013 Earthworm,<\/span>
\n(c) Molecular production \u2013 Amoeba,<\/span>
\n(d) Reproduction \u2013 Dryopteris.<\/span><\/p>\n

(vi) The perfection of the genitals and gonads occurs at the time of human maturation \u2014<\/span><\/p>\n

(a) In childhood,<\/span>
\n(b) In adolescence,<\/span>
\n(c) In old age,<\/span>
\n(d) In the newborn period.<\/span><\/p>\n

(vii) The latent characteristic of the pea plant is \u2013<\/span><\/p>\n

(a) Conical seeds,<\/span>
\n(b) yellow seeds,<\/span>
\n(c) purple flowers,<\/span>
\n(d) axillary flowers.<\/span><\/p>\n

(viii) How many types of gametes are produced from a pea plant with the genotype YyRr? \u2013<\/span><\/p>\n

(a) 1,
\n(b) 4,
\n(c) 2,
\n(d) 3\u0964<\/p>\n

(ix) The probability of daughters of a hemophilia carrier mother and a normal father being affected by hemophilia is \u2013<\/span><\/p>\n

(a) 75%,
\n(b) 50%,
\n(c) 100%,
\n(d) 0%\u0964<\/p>\n

(x) The gas that was absent in the atmosphere at the time of the creation of life on Earth is \u2013<\/span><\/p>\n

(a) Hydrogen,<\/span>
\n(b) Oxygen,<\/span>
\n(c) Methane,<\/span>
\n(d) Ammonia.<\/span><\/p>\n

(xi) The characteristic of symmetrical organs is \u2013<\/span><\/p>\n

(a) Different in origin and different in function,<\/span>
\n(b) Different in origin but same in function,<\/span>
\n(c) Indicates divergent evolution<\/span>
\n(d) Same in origin and structure.<\/span><\/p>\n

(xii) Which of the following absorbs gas from the bony fish’s gills? \u2013<\/span><\/p>\n

(a) Red gland,<\/span>
\n(b) Anterior chamber,<\/span>
\n(c) Gastric gland,<\/span>
\n(d) Retia mirabilia.<\/span><\/p>\n

(xiii) The bacterium Pseudomonas is associated with which of the given steps of the nitrogen cycle?<\/span><\/p>\n

(a) Nitrogen fixation,<\/span>
\n(b) Nitrification,<\/span>
\n(c) Denitrification,<\/span>
\n(d) Ammonification<\/span><\/p>\n

(xiv) An endangered species of the East-Himalayan Biodiversity Hotspot is \u2013<\/span><\/p>\n

(a) Lion-tailed macaque,<\/span>
\n(b) Orangutan,<\/span>
\n(c) Red panda,<\/span>
\n(d) Nilgiri tiger.<\/span><\/p>\n

(xv) Diseases associated with air pollution are \u2013<\/span><\/p>\n

(a) Diarrhea, typhoid, hepatitis,<\/span>
\n(b) Hepatitis, bronchitis, deafness,<\/span>
\n(c) Bronchitis, asthma, lung cancer,<\/span>
\n(d) Lung cancer, polio, malaria.<\/span><\/p>\n

Section- B<\/span><\/strong><\/p>\n

2) Write the answers to any 21 of the 26 questions below as instructed: 1\u00d721=21<\/span><\/strong><\/p>\n

Fill in the blanks in the following sentences by inserting suitable words: (Any five) 1\u00d75=5<\/span><\/em><\/strong><\/p>\n

(i) The method of adjusting the focal length of the lens of the human eye as required is called ___.<\/span><\/p>\n

(ii) Adenine is a _______ type of nitrogenous base.<\/span><\/p>\n

(iii) ______ is a disease caused by a sex-linked gene.<\/span><\/p>\n

(iv) The earliest ancestor in the evolution of horses is_____<\/span><\/p>\n

(v) A flammable greenhouse gas produced from rice fields is______.<\/span><\/p>\n

(vi) _____ is a biosphere reserve located in West Bengal.<\/span><\/p>\n

Determine whether the following sentences are true or false: (Any five) 1\u00d75=5<\/span><\/em><\/strong><\/p>\n

(vii) Gibberellin hormone prevents premature defoliation of plants.<\/span><\/p>\n

(viii) Eggs are produced only by mitosis.<\/span><\/p>\n

(ix) Pea flowers can be self-pollinated or cross-pollinated as required.<\/span><\/p>\n

(x) The process of natural selection is the main theme of Darwin’s theory of evolution.<\/span><\/p>\n

(xi) Fragile contaminants are responsible for biodegradation.<\/span><\/p>\n

(xii) Flagella are the locomotor organs of paramecium.<\/span><\/p>\n

Rewrite the correct pair of comic numbers in both columns by matching the word given in column A with the most appropriate word given in column B: (Any five) 1\u00d75=5<\/span><\/em><\/strong><\/p>\n

A level B level<\/span><\/strong><\/p>\n

(xiii) Blind spot (a) Groundwater pollution<\/span>
\n(xiv) Cytokinesis (b) Retina and optic nerve junction<\/span>
\n(xv) 44A + XY (c) Homologous organs<\/span>
\n(xvi) Wings of bats and birds (d) Structure of the oviduct<\/span>
\n(xvii) Arsenic (e) Pollen<\/span>
\n(xviii) Migration to the cervix (f) Noise pollution<\/span>
\n(g) Chromosome arrangement of male humans<\/span><\/p>\n

Answer in one word or one sentence (any six) 1\u00d76=6<\/span><\/strong><\/p>\n

(xix) Choose the opposite and write – TSH, ACTH, GTH, CSF<\/span><\/p>\n

(xx) Write a work on myelin sheath.<\/span><\/p>\n

(xx) A related pair of words is given below. Understand the relationship of the first pair and fill in the blanks of the second pair with the appropriate word – Prophase: Disappearance of the nuclear membrane and nucleolus :: Reappearance of the nuclear membrane and nucleolus.<\/span><\/p>\n

(xxi) Give an example of a variation transmitted through heredity in humans.<\/span><\/p>\n

(xxiii) Which type of chromosome in humans carries the gene responsible for thalassemia disease?<\/span><\/p>\n

(xxiv) Mention a morphological adaptation of cactus to prevent transpiration.<\/span><\/p>\n

(xxv) Out of the four given topics, three belong to one topic, find out that topic and write it: soil, dividing banana, seeds, cryopreservation.<\/span><\/p>\n

(xxvi) Name the reason for the recent environmental concern in the Sundarbans.<\/span><\/p>\n

Section-C<\/span><\/strong><\/p>\n

3) Write the answer to any 12 of the 17 questions below in two-three sentences: 2 x 12= 24<\/span><\/strong><\/p>\n

(i) Write two differences between tropic movement and nastic movement.<\/span><\/p>\n

(i) Write two roles of GTH in the secretion of hormones from the gonads in the human body.<\/span><\/p>\n

(ii) List which of the following actions are innate or acquired reflex actions.<\/span><\/p>\n

(a) The desire of a newborn to suckle;<\/span>
\n(b) Riding a bicycle;<\/span>
\n(c) Sneezing;<\/span>
\n(d) Catching the wicket-keeper’s ball with agility.<\/span><\/p>\n

(iv) Write the parts of the central nervous system and the peripheral nervous system.<\/span><\/p>\n

(v) Write two important points of the cell cycle.<\/span><\/p>\n

(vi) Determine the difference between DNA and RNA based on the given characteristics:<\/span><\/p>\n

(a) Pyrimidine bases;<\/span>
\n(b) 5-C sugars.<\/span><\/p>\n

(vii) Which vectors carry out pollination in the given plants?<\/span><\/p>\n

(a) Paddy;<\/span>
\n(b) Leafy greens;<\/span>
\n(c) Shimul;<\/span>
\n(d) Mango.<\/span><\/p>\n

(viii) Write with the help of examples how the dominant trait is revealed in the hybridization experiment.<\/span><\/p>\n

(ix) In case of incomplete dominance, what will be the ratio of phenotype to genotype in the F-gene in a cross experiment?<\/span><\/p>\n

(x) Show with the help of a cross how colour blindness is inherited.<\/span><\/p>\n

(xi) Write the name of the reactants used in Miller and Urey’s experiment on the chemical origin of life and one organic compound produced.<\/span><\/p>\n

(xii) Write four important characteristics that have changed in the evolution of horses.<\/span><\/p>\n

(xiii) How does the Sundari tree excrete excess salt from its body?<\/span><\/p>\n

(xiv) Write the names of two microorganisms that participate in the biological nitrogen fixation process.<\/span><\/p>\n

(xv) Mention two damages caused by acid rain.<\/span><\/p>\n

(xvi) Give four examples of the loss of biodiversity caused by the development of the world.<\/span><\/p>\n

(xvii) Write the main issues related to biodiversity recorded in the People’s Biodiversity Register (PBR).<\/span><\/p>\n

Section-1<\/span><\/strong><\/p>\n

4) Write the answers to the following six questions or their alternative questions: 5\u00d76=3<\/span><\/strong>\u00a00<\/span><\/p>\n

(i) Draw a neat diagram of the cross-section of the human eyeball and label the following parts. (a) Cornea, (b) Lens, (c) Vitreous humor, (d) Retina. 3+2=5<\/span><\/p>\n

Or,<\/span><\/p>\n

Draw a neat picture of the metaphase stage of mitosis cell division of a plant cell or an animal cell and label the given parts: (a) chromosomes, (b) spindle, (c) polar regions, (d) centromere. 3+2=5<\/span><\/p>\n

(ii) Explain the interrelationship between chromosomes, DNA and genes. Write the difference between euchromatin and heterochromatin on the following two points: (a) Coiling; (b) Activity.3+2=5.<\/span><\/p>\n

Or,<\/span><\/p>\n

How is micropropagation carried out? Explain the following three stages of sexual reproduction in flowering plants: (a) Gamete production; (b) Fertilization; (c) Embryo formation and formation of new plants. 2+3=5<\/span><\/p>\n

(iii) Show with the help of a checker board the types of offspring that can be produced by mating a hybrid black guinea pig with a pure white guinea pig. State Mendel’s law of segregation. 3+2=5<\/span><\/p>\n

Or,<\/span><\/p>\n

Mention the symptoms of thalassemia. In many families, the mother is blamed for the birth of a girl child. Show with the help of a cross that this idea is not correct. 2+3=5<\/span><\/p>\n

(iv) Mention the two structural features on the basis of which the ‘whale flipper’ and the ‘bird wing’ are considered as homologous organs. How does a worker bee in a hive find and inform other worker bees about the location of food sources? 2+3=5<\/span><\/p>\n

Or,<\/span><\/p>\n

Show the main events of expression or evolution through a time series diagram.<\/span><\/p>\n

(iv) What are the causes of asthma? What is the role of Joint Forest Management in biodiversity conservation? 2+3=5<\/span><\/p>\n

Or,<\/span><\/p>\n

Determine the reasons for the decline in biodiversity with the help of correct examples.<\/span><\/p>\n

(vi) Suggest two conservation measures to increase the population of Indian one-horned rhinoceros. Give your opinion on the ways in which freshwater sources are polluted \u2013 based on your experience. 2+3=5<\/span><\/p>\n

Or,<\/span><\/p>\n

What conditions would you consider if you wanted to declare one of the two areas as a biodiversity hotspot? Give two examples of ex situ conservation. 3+2=5<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

Category- A 1) Complete the sentence by choosing the correct answer to each question and writing its serial number: 1 x 15= 15 (i) Some flowers bloom after sunrise, but wither with sunset. This is \u2013\u00a0 (a) Photonasty, (b) Seismonasty, (c) Chemonasty, (d) Thermonasty. (ii) A person suffering from diabetes mellitus is unable to secrete […]<\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[470],"tags":[],"class_list":["post-2427","post","type-post","status-publish","format-standard","hentry","category-bengla-madhyamik-pdf"],"_links":{"self":[{"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/posts\/2427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/comments?post=2427"}],"version-history":[{"count":0,"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/posts\/2427\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/media?parent=2427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/categories?post=2427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.reilsolar.com\/ebook\/wp-json\/wp\/v2\/tags?post=2427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}