Thursday, 25 November 2021

GUESS PAPER BIOLOGY-2 : CLASS XII BIOLOGY TERM-1

 

 

GUESS PAPER BIOLOGY-2 : CLASS XII BIOLOGY TERM-1 FOR PSEB/ CBSE) 
NOTE: THERE WILL BE  35 multiple choice questions in the paper.
All questions are compulsory 






Q1 . The number of chromosomes in the shoot tip cells of a maize plant is 20.The number of chromosomes in the microspore mother cells of the same plant shall be

  • (a) 20

  • (b) 10
  • (c) 40
  • (d) 15

  • (a) 20

Q2. What is indicated by 'a' in the figure ..? 



  • (a) Chlorophyll
  • (b) Pyrenoid
  • (c)  Tentacles
  • (d) Nuclous

  • (b) Pyrenoid


Q3. In a flowering plant, archesporium gives rise to  

  • (a) only tapetum and sporogenous cells
  • (b) only the wall of the sporangium 
  • (c) Both wall and  sporogenous cells
  • (d) Wall and the tapeturn 

  • (c) Both wall and  sporogenous cells


Q4. Cotyledon of maize grain is called

  • (a) Plumule
  • (b) Coleorhiza 
  • (c) Coleoptile
  • (d) Scutellum

  • (d) Scutellum 

Q5. The 'ubisch bodies' are present in 

  • (a) pollentube
  • (b) P.M.C
  • (c) pollengrain 
  • (d) tapetal cells 

  • (b) P.M.C

Q6. Identify P-V in the given figure and select the collect option  



  • a) P-Petal, Q-Sepal, R-Filament, S-Anther, T-Style, U-Stigma, V-Ovary
  • (b) P-Petal, Q-Sepal, R-Anther, S-Filament, T-Stigma, U-Style, V-Ovary
  • (c) P-Sepal, Q-Petal, R-Anther, S-Filament, T-Stigma U-Style, V-Ovary
  • (d)) P-Ovary, Q-Petal, R-Anther, S-Filament, T-Stigma, U-Style, V-Sepal

  • (c) P-Sepal, Q-Petal, R-Anther, S-Filament, T-Stigma U-Style, V-Ovary

Q7. The Phenomenon of polyembryony was first observed by 

  • (a) Mangifera 
  • (b) Lillium
  • (c) Citrus
  • (d)  Euphoria

  • (c) Citrus


Q8. Sperms undergoing maturation are stored till ejaculation in 

  • (a) epidymis
  • (b) seminal vesicle
  • (c) rete testis
  • (d) seminiferous tubule

  • (b) seminal vesicle


Q9. Ureters are lined by  

  • (a) squamous epithelium
  • (b) Cuboidal epithelium
  • (c) simple Columnar  epithelium
  • (d) urothelium  

  • (d) urothelium   

Q10.Relaxin is released from 

  • (a) pituitary 
  • (b) ovary
  • (c) testis  
  • (d) adrenals 

  • (b) ovary


Q11 .  Match each function below with the associated part or parts of the human male reproductive system shown in the figure 




  • (i) Produces sperm
  • (ii) Conducts the sperm through the penis to the outside of the body
  • (iii) Produces seminal fluid
  • (iv) Connects the epididymis with the urethra
  • (a) (i)-G, (ii)-E, (iii)-A, C, D, (iv)-B 
  • (b) (i)-A, B-(ii)-E, (iii)-C, D, (iv)-G
  • (c) (i)-G, (ii)-F, (iii)-A, B, C (iv)-E 
  • (d) (1)-F, (ii)-E, (iii)-A B, D, (iv)-C
  • (a) (i)-G, (ii)-E, (iii)-A, C, D, (iv)-B 

Q12. In spermatogenesis which of the following is produced after the first meiotic division of spermatogonia

  • (a) Primary spermatocytes 
  • (b) Secondary spermatocytes 
  • (c) Spermatids 
  • (d) all of these  

  • (b) Secondary spermatocytes


Q13. Average ratio of man and woman in human population in India

  • (a) 3 : 4 
  • (b) 1: 1
  • (c) 3: 5  
  • (d) 1: 2 

  • (b) 1: 1


Q14. GIFT is 

  • (a) embryo implantation in vivo fertilization
  • (b) egg implantation for in vivo fertilization
  • (c) embryo implantation  after in vitro fertilization
  • (d) egg implantation after in vivo fertilization

  • (c) embryo implantation  after in vitro fertilization

Q15. The Cu²⁺ released from IUDs help in contraception by

  • (a) Inhibiting ovulation
  • (b)  suppressing sperm motility  
  • (c) making uterine endometrium unsuitable for implantation 
  • (d)  Solid in liquid

  • (b)  suppressing sperm motility




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


GK OF TODAY

For all competition read important general knowledge questions


Q16.To determine the genotype of a tall plant of F₂ generation, Mendel crossed this plant with a dwarf plant. This process represents a 

  • (a) Test Cross
  • (b) mono hybrid cross 
  • (c) reciprocal cross
  • (d) dihybrid cross 

  • (a) Test Cross

Q17. Drosophila with 2A + XO are 

  • (a) fertile female 
  • (b) infertile female 
  • (c) sterite male 
  • (d) intersexes

  • (c) sterite male 


Q18. Monosomy and trisomy can be represented as 

  • (a) 2n + 1, 2n +3
  • (b) 2n -1, 2n -2
  • (c) 2n , 2n +1 
  • (d) 2n-1, 2n+1 

  • (d) 2n-1, 2n+1 


Q19. Haemophlia  is more commonly seen in human males than in human females because 

  • (a) This disease is due to an X-linked dominant mutation.
  • (b) a greater proportion of girls die in infancy.
  • (c)This disease is due to an X-linked recessive  mutation.
  • (d) This disease is due to an Y-linked recessive  mutation.

  • (c)This disease is due to an X-linked recessive  mutation.

Q20. In Melandrium, plants  presence of 2 pairs of autosomes and an allosomal composition of XYZ would make them 

  • (a) Males 
  • (b) Female
  • (c) Sterile 
  • (d) Intersexex

  • (a) Males 



For all exam, read the gk of today

Q21 . The total number of amino acids involved in protein synthesis are 

  • (a)  20
  • (b)  120
  • (c)  110
  • (d)  64
  • (a)  20

Q22.  HIV RNA replication is helped in our body by 

  • (a) RNA polymerase
  • (b) DNA polymerase
  • (c) Primase
  • (d)reverse transcriptase 

  • (d)reverse transcriptase 


Q23. When DNA is formed from RNA it is called 

  • (a) D DNA
  • (b) ZDNA
  • (c) cDNA
  • (d) A DNA

  • (c) cDNA

Q24. The coden AUG is 

  • a) Ochre
  • (b) Amber
  • (c) Initiation codon 
  • (d) Termination codon 

  • (c) Initiation codon 

Q25. Open reading frame ORF starts with

  • (a) AUG
  • (b) UAC
  • (c) AUC
  • (d) GUC

  • (a) AUG


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

  • (a)
  • (b) 2pq 
  • (c) pq
  • (d) 

  • (b) 2pq 

Q27. The Presence of gill slits, in the embryos  of all vertebrates, supports the theory of 

  • (a) metamorphosis
  • (b) biogenesis
  • (c) organic evolution 
  • (d) recapitulation

  • (d) recapitulation


Q28.  Age of fossils in the past was generally determined by radio-carbon method and other methods involve radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms, includes

  • (a) study of carbohydrates/proteins in fossils
  • (b) study of the conditions of fossilization
  • (c) electron spin resonance (ESR) and fossil DNA
  • (d) study of carbohydrates / proteins in rocks.

  • (c) electron spin resonance (ESR) and fossil DNA


Q29.  According to Darwin, the organic evolution is due to

  • (a) Competition within closely related species
  • (b) Reduced feeding efficiency in one species due to the presence of interfering species
  • (c) Intraspecific competition
  • (d) Interspecific competition
  •   

  • (d) Interspecific competition

Q30. The tendency of population to remain in genetic equilibrium may be distributed by.....

  • (a) Random mating
  • (b) lack of migration 
  • (c) lack of mutation 
  • (d) lack of random mating 

  • (d) lack of random mating 


Q31 . Ergot is a drug derived from fungus 

  • (a) Aspergillus 
  • (b) Phytophora
  • (c) Claviceps
  • (d) Peronospora
  • (c) Claviceps

Q32. A young drug addict used to show symptoms of depressed brain activity, feeling calmness, relaxation, drowsiness. Possibly he was taking 

  • (a) Amphetamine
  • (b) Marijuana
  • (c) Pethidine 
  • (d) Valium

  • (d) Valium


Q33. The blood cancer is known as 

  • (a) Haemolysis 
  • (b) haemophilia
  • (c) leukaemia
  • (d) thrombosis

  • (c) leukaemia


Q34. HIV causes AIDS by attacking a type of white blood cell called 

  • (a) CD4
  • (b) CD3
  • (c) CD8
  • (d) None of the above 

  • (a) CD4

Q35.  Antivenom infection  contains performed antibodies while polio drops that are administered into the body contain 

  • (a) Attenuated pathogens 
  • (b) Activated pathogens 
  • (c) Harvested antibodies 
  • (d) Gamma globulin

  • (a) Attenuated pathogens 



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