Saturday, 20 November 2021

MODEL/GUESS PAPER : 10+2 BIOLOGY MODEL QUESTION PAPER( WITH ANSWER)

MODEL TEST PAPER CLASS XII BIOLOGY (TERM -1) ( FOR PSEB/ CBSE) 
NOTE: THERE WILL BE  35 multiple choice questions in the paper.
All questions are compulsory 


Q1 . Identity the given organism and find its maximum life span

  • (a) Sparrow, 25 years 
  • (b) Crow,  30 years 
  • (c) Crow, 15 Years 
  • (d) Eagle, 40Years 
  • (c) Crow, 15 Years

Q2. In which of the following mammal oestrans cycle is absent

  • (a) Cow
  • (b) horse
  • (c) monkey
  • (d) rabbit

  • (c)  monkey


Q3. Meiosis is best seen in

  • (a) gamete
  • (b) microsporangium
  • (c) Pollen grain
  • (d) anther wall

  • (b) microsporangium


Q4. In xenia, pollen affects

  • (a)endospern 
  • (b) testa
  • (c) tagmen
  • (d) nucellus

  • (a) endospern

Q5. The concept of plant test tube fertillization was first reported from the laboratory of 

  • (a) P. Maheshwari 
  • (b) Skoog
  • (c) Shimakuran
  • (d) Nitsch

  • (a) P. Maheshwari 


Q6. Identify the diagram.



  • (a) Pollen tetrad
  • (b) Pollen mother cell
  • (c) Mature pollengrain
  • (d) Mega spore mother cell

  • (c)  Mature pollengrain


Q7. The 'ubisch bodies' are present in 

  • (a) pollentube 
  • (b) P.M.C
  • (c) pollen grain
  • (d) taperal cells

  • (b)  P.M.C


Q8. GIFT involves 

  • (a) transfer of zygote into the fallopian tube 
  • (b) transfer of embryo into the uterus 
  • (c) transfer of a mixture of sperms and ova into the fallopian tube  
  • (d) transfer of a mixture of sperms and ova into the uterus 

  • (c) transfer of a mixture of sperms and ova into the fallopian tube


Q9. Capacitation occurs in:

  • (a) Rete Testis
  • (b) Epididymis
  • (c) Vas deferns
  • (d) Female Reproductive Tract

  • (d) Female Reproductive Tract

Q10.Amphimixis is 

  • (a) reaction of antifertilizin and fertilizin
  • (b) fusion of male and female pronuclei
  • (c) formation of reception cone by ovum
  • (d) penetration of sperm into ovum 

  • (b) fusion of male and female pronuclei


Q11 .  The given figure is of human female reproductive system. identify the parts labelled A,B,C and D select the correct option 



  • (a) A - Oviduct , B- Uterus, C- Ovarian Ligament, D- Ovary 
  • (b) A - Cervix , B- Uterus, C- Ovary, D - Tumour
  • (c) A- Uterus, B-Uterus cavity,  C- Oviducal funnel, D- Ovary 
  • (d) A- Cervix, B-Uterus cavity,  C- Fallopian Tube, D- Ovary 
  • (d) A- Cervix, B-Uterus cavity,  C- Fallopian Tube, D- Ovary 

Q12. Menstrual cycle occurs in 

  • (a)Female primates 
  • (b) human primates 
  • (c) mammalian females
  • (d) rabbit

  • (b)  human primates


Q13. How many condoms per year may be needed to protect a couple from increasing the population of India 

  • (a) 3
  • (b) 52
  • (c) 72
  • (d) 92 only

  • (c)72


Q14. Amniocentensis is 

  • a) Intrauternie diagnosis 
  • (b) analysis of viral diseases 
  • (c) obtaining amniotic cells to study congential disorders 
  • (d)all above 

  • (c) obtaining amniotic cells to study congential disorders

Q15. In India, the population policy was announced in which year? 

  • (a) 1971
  • (b) 1976
  • (c) 1978
  • (d)1981

Q16.XO type of sex determination is seen in

  • (a) Man
  • (b) Grasshopper
  • (c) Horses
  • (d) Drosophilia 

  • (b) Grasshopper


Q17. Karytyping is based on 

  • (a) Number of centromeres 
  • (b) Number and size of chromosomes 
  • (c) Number of genes
  • (d) number of silent genes

  • (b) Number and size of chromosomes


PHYSICS/CHEMISTRY GUESS PAPER FOR PSEB/CBSE FIRST TERM EXAM 2021



Q18. Person who are color blind cannot distinguish 

  • (a) red and green
  • (b) yellow and white 
  • (c) black and white
  • (d) yellow and blue

  • (a) red and green


Q19. A couple whose sons are colourblind with AB blood group, identify the parents from the following

  •  (a) mother colourblind with A good group and father normal with blood group B 
  •  (b) mother normal with blood group A and father colourblind with blood group B 
  •  (c) mother colourblind with blood group B and father normal with blood group B 
  •  (d) mother normal with blood group A and father colourblind with blood group B 

  • (a)  mother colourblind with A good group and father normal with blood group B

Q20. Mendel studied seven  contrasting characters for his breeding experiment with pes. which of the following characters he did not use. 

  • a) Pod shape
  • (b) Leaf Shape 
  • (c) Plant height
  • (d)  Pod color

  • (b) Leaf Shape

For all exam, read the gk of today



Q21 . The thinnest DNA form is 

  • (a) A 
  • (b) B 
  • (c) Z
  • (d) none above  
  • (c) Z

Q22. Genetic code is 

  • (a) degenerate, overlapping, ambigous 
  • (b) degenerate, non overlapping, unambigous 
  • (c) universal, overlapping, ambigous 
  • (d)  degenerate, non overlapping, ambigous

  • (b)   degenerate, non overlapping, unambigous 


Q23. Out of 64 codons, the number of codons with GGG is 

  • (a) 1
  • (b) 2
  • (c) 4
  • (d) 6

  • (a)1

Q24. The correct sequence according to the molecular weight is 

  • (a) rRNA, tRNA, DNA 
  • (b) tRNA, DNA, rRNA
  • (c) rRNA, DNA, tRNA 
  • (d) DNA, rRNA, tRNA

  • (a) rRNA, tRNA, DNA

PHYSICS/CHEMISTRY GUESS PAPER FOR PSEB/CBSE FIRST TERM EXAM 2021



Q25. AUG codes for 

  • (a) methionine 
  • (b) phenylalanine 
  • (c) Shimakuran
  • (d) Nitsch

  • (a) methionine


Q26. In Hardy Weinberg equation, the frequency of heterozygous individual is represented by 

  • (a) `p^{2}`
  • (b) 2pq
  • (c) pq
  • (d) `q^{2}`

  • (c)  pq

Q27. Which of the following evidences does not favour  the Lamarckian concept of inheritance 

  • (a) Lack of pigment in cave- dwelling animals
  • (b) melanization in peppered moth of acquired characters
  • (c) absence of limbs in snakes 
  • (d) presence of webbed toes in aquatic birds.

  • (b) melanization in peppered moth of acquired characters


Q28. At a particular locus, frequency of A allele is 0.6 and that of a is 0.4. What would be the frequency of heterozygotes in a random mating population at equilibrium? 

  • (a) 0.36
  • (b) 0.16
  • (c) 0.24
  • (d) 0.48 

  • (d) 0.48 


Q29. The wings of a bird and the wings of an insect are 

  • (a) Homologous structure and represent divergent evolution 
  • (b) Analogous structure and represent  convergent evolution 
  • (c) Phylogenic  structure and represent divergent evolution 
  • (d) Homologous structure and represent conergent evolution 

  • (b) Analogous structure and represent  convergent evolution 

Q30. Genetic drift operates in 

  • (a) small isolated population
  • (b) large isolated population
  • (c) non- reproductive population
  • (d) slow reproductive population 

  • (a)  small isolated population


Q31 .  Which immunoglobulin is the largest in size

  • (a) IgA
  • (b) IgD
  • (c) IgE
  • (d) IgM
  • (d) IgM

Q32. Brown Sugar is 

  • (a) diacetyl morphine hydrochloride
  • (b) Theophylline
  • (c) Lorazepam
  • (d)Methedrine 

  • (d) Methedrine 


Q33. In which disease does mosquito transmit pathogen to lymphatic vessels?

  • (a) Ringworm disease 
  • (b) Elephantiasis 
  • (c) Ascariasis 
  • (d) Amoebiasis 

  • (b) Elephantiasis 


Q34. HIV mainly affects  

  • a) Cytotoxic T-lymphocytes 
  • (b) Helper lymphocytes 
  • (c) Cell-mediated  T-lymphocytes  
  • (d) None of the above 

  • (b) Helper lymphocytes 

Q35. A toxic substance responsible for the chills and high fever recurring every three to four days in malarial fever, is  

  • (a) interferon 
  • (b) haemozoin
  • (c) hirudin
  • (d)colostrum

  • (b)  haemozoin


PHYSICS/CHEMISTRY GUESS PAPER FOR PSEB/CBSE FIRST TERM EXAM 2021



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