GOA Board HSSC Model Question Papers 2020 – 2021 | goa board prelims paper
Section – A
1. Gel electrophoresis is used in DNA profiling. which of the following is in incorrect statement regarding gel electrophoresis ?
(a) An Electric current is passed through the gel matrix to separate DNA molecules.
(b) DNA Molecules move towards the -ve electrode.
(c) different size DNA molecules form distinct bands on the gel.
(d) Larger DNA molecules move through the gel more slowly than the smaller DNA molecules.
2. ‘ Saheli’ is a non steroidal preferred Female Contraceptive because it can be taken:
(a) once a month
(b) once a week
(c) once in a fortnight
(d) continuously only for 7 days in a month.
GOA Board HSSC Model Question Papers 2020 – 2021 | goa board prelims paper
3. the figure depicts the proportionate number of species major taxa of vertebrates at the global level.
‘A’In the given diagram represent
(a) mammals
(b) Birds
© fish
(d) Amphibiansllinat
4. for the lac-operon to be operational in E.coil, lactose in its culture medium acts as
(a) a regulator
(b) an operator
(c) an inducer
(d) repressor
5. name the breeding process that helped In developing resistance in mung beans to yellow mosaic virus and powdery mildew.
6. right to ways in which meiosis contributes to genetic variation during gametogenesis.
7. In organism exhibiting internal fretilization the male gametes are motile. how was the non motile male gametes in seed plants reached to the female gametes ?
8. draw a labeled diagram of nucleosome.
Section- B
9. write the differences in the replicating strands in a replicating fork.
10. why do majority of flowering plants producting harmaphrodite flowers prefer cross pollination to self pollination ? Give a Reason. maintain any two devices developed by them To encourage cross pollination Pollination.
11. genetic variability is the root of any breeding programme. explain the importance of genetic variability in the breeding programme.
12. you are asking to prepare a plan of an artificial cloning vector for a biotechnology experiment. Name the different essential components that you will suggest for the required cloning vector and why ?
13. name and state the functions of the two factors RNA polymerases is associated with, to carry transcription in bacteria.
14. How do cry genes when incorporated in cotton plants make it bol bollworm resistant ? explain.
15. A cut his foot on a rusty metal while Playing football and had to go to the doctor to have stitches. the doctor also give him an injection to prevent him from contracting a certain disease.
(a) name the disease the doctor feared the boy might contact.
(b) what did the doctor inject and why was n immediate need for such an injection ?
(c) state the kind of immunity the boy could gain from the injection.
16. (a) can apomictic hybrid seeds BR solution to the above situation ? give reason in support of your answer.
(b) why do the seed produced by the hybrid plants, when sown, fail to give the crop the same character which were observed in the previous crop ?
18. write the usefulness of molecular scissors and polymerase chain reaction in biotechnology
Or
A group of Bacteria are referred to as ‘ methanogens’ why are they so called ? explain.
GOA Board HSSC Model Question Papers 2020 – 2021 | goa board prelims paper
Section- C
19. A Couple with normal vision has two children, one of them is colourblind. explain with the help of a cross how it is possible. mention the sex all the affected child .
Or
mention the genotypes of the following plants giving reason in support of your answer.
(a)Snapdragon plant bearing red flowers.
(b) A pea plant bearing violet Flowers in the axial position.
20. draw a labelled diagram of blastocyst. describe the process of implantation of blastocyst in the human uterus.
21. the population of the world suffers from ‘ hidden hunger’ what does ‘ hidden hunger’ refer to ? explain with the help of suitable example anyone with that can help in overcoming this problem.
22. how was the American company Eli Lilly successful in producing human insulin by using Recombinant DNA technology ? why is this insulin very much preferred to the ones produced
by the conventional methods ?
23. in your class the teacher has assigned the topic for discussion on impact of human activities on :
(a) carbon cycle and
(b) biodiversity
How convincingly will you present the impact of the mentioned topic ? explain giving reason.
24. where would you find xerarchsuccession in progress ? Xerarch succession from a pioneer species to the climix community.
25. explain with the help of an example that homology is based on divergent evolution.
26. explain why is there a time long of few months too many years between the infection and symptoms of ‘ AIDS’ to appear.
27.Your mother is unknowingly Using macrobes in her kitchen inspite Of her never being a Biology student. example with the help of three example how she is making use of beneficial microbes.
GOA Board HSSC Model Question Papers 2020 – 2021 | goa board prelims paper
Section- D
Political Science Annual Exam Question Paper for Class 11th
28.(a) Construct a food chain representing the correct. order of biomagnification in an equatic eco system.
(b) state the cause of biomagnification .
(c) mention the effect of biomagnification on the organisation occupying the highest trophic level.
Or
(a) construct pyramid of Biomass and pyramind of number for the following food chain.
(b) Explain giving reason the difference observed between the two pyramids drawn by you.
© Name the type of pyramid that is always upright and why .
29.(a)Write the events that taken place in ribosome during translation in bacteria.
(b) state what is eminoacylation and write its importance in Translation.
© Why is a t- RNA molecule referred t o as an adaptor molecule ?
(d) what is an m- RNA translation unit ?
Or
(a) Darwin observed a variety of finches with different type of beaks on his visit to Galap agos islands. Write the explanation he gave and the conclusion he arrived it it.
(b) write The difference in the mechanism of evolution of explained by Darwin a nd de-vries.
30.(a) Where is a microsporangium located in and angiosperm? mention the ploidy and the function of tapeetum.
(b) name the tissue that undergoes microprorgenesis . draw the diagram of its bicelled end product and label its different parts.
GOA Board HSSC Model Question Papers 2020 – 2021 | goa board prelims paper
(c) write any two specific characteristics of the two cells tablet in the above diagram.
Or
(a) differentiate between the process of spermatogenesis and oogenesis on the basis of the following :
(i) time of its initiation
(ii) site of its completion
(iii) nature of meiotic division undergone by the gamelet mother cells.
(b) draw the sectional view of human ovary and label the following.
(i) Follicle Containing primary oocyte
(ii) follicle containing secondary oocyte
(iii) follicle that undergoes ovulation
(iv) structure that release large amount of progesteron.
GOA Board HSSC Model Question Papers 2020 – 2021 | goa board prelims paper
