(i) There are a total of 26 questions and five sections in the question paper, All questions are compulsory.
(ii) Section A contains question number 1 to 5, Very Short Answer type questions of one mark each.
(iii) Section B contains question number 6 to 10, Short Answer type I questions of two marks each.
(iv) Section C contains question number 11 to 22, Short Answer type II questions of three marks each.
(v) Section D contains question number 23, Value Based Question of four marks.
(vi) Section E contains question number 24 to 26, Long Answer type questions of five marks each.
(vii) There is no overall choice in the question paper, however, an internal choice is provided in one question of two marks, one question of three marks and all three questions of five marks. An examinee is to attempt any one of the questions out of the two given in the question paper with the same question number.
- Q1VIEW SOLUTION
- Q2VIEW SOLUTION
- Q3VIEW SOLUTION
- Q4VIEW SOLUTION
- Q5VIEW SOLUTION
What is mutualism? Mention any two examples where the organisms involved are commercially exploited in agriculture.
List any four techniques where the principle of ex-situ conservation of biodiversity has been employed. VIEW SOLUTION
- Q7VIEW SOLUTION
- Q8VIEW SOLUTION
(a) Select the analogous structures from the combinations given below :
(i) Forelimbs of whales and bats
(ii) Eyes of octopus and mammals
(iii) Tuber of sweet potato and potato
(iv) Thorns of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent.VIEW SOLUTION
- Q10VIEW SOLUTION
A heavily bleeding and bruised road accident victim was brought to a nursing home. The doctor immediately gave him an injection to protect him against a deadly disease.VIEW SOLUTION
(a) Write what did the doctor inject into the patient's body.
(b) How do you think this injection would protect the patient against the disease?
(c) Name the disease against which this injection was given and the kind of immunity it provides.
- Q12VIEW SOLUTION
- Q13VIEW SOLUTION
Two independent monohybrid crosses were carried out involving a tall pea plant with a dwarf pea plant. In the first cross, the offspring population had equal number of tall and dwarf plants, whereas in the second cross it was different. Work out the crosses, and explain giving reasons for the difference in the offspring populations.VIEW SOLUTION
- Q15VIEW SOLUTION
State the medicinal value and the bioactive molecules produced by Streptococcus, Monascus and Trichoderma.
What are methanogens ? How do they help to generate biogas ? VIEW SOLUTION
- Q17VIEW SOLUTION
- Q18VIEW SOLUTION
- Q19VIEW SOLUTION
Rearrange the following in the current sequences to accomplish an important biotechnological reaction :VIEW SOLUTION
(a) In vitro synthesis of region of DNA of interest
(b) Chemically synthesised oligonucleotides
(c) Enzyme DNA-polymerase
(d) Complementary region of DNA
(e) Genomic DNA template
(f) Nucleotides provided
(h) Thermostable DNA-polymerase (from Thermus aquaticus)
(i) Denaturation of ds-DNA
- Q21VIEW SOLUTION
- Q22VIEW SOLUTION
Your school has been selected by the Department of Education to organize and host an interschool seminar on "Reproductive Health – Problems and Practices". However, many parents are reluctant to permit their wards to attend it. Their argument is that the topic is "too embarrassing."VIEW SOLUTION
Put forth four arguments with appropriate reasons and explanation to justify the topic to be very essential and timely.
(a) List the different attributes that a population has and not an individual organism.
(b) What is population density ? Explain any three different ways the population density can be measured, with the help of an example each.OR"It is often said that the pyramid of energy is always upright. On the other hand, the pyramid of biomass can be both upright and inverted." Explain with the help of examples and sketches. VIEW SOLUTION
(a) Plan an experiment and prepare a flow chart of the steps that you would follow to ensure that the seeds are formed only from the desired sets of pollen grains. Name the type of experiment that you carried out.
(b) Write the importance of such experiments.OR
Describe the roles of pituitary and ovarian hormones during the menstrual cycle in a human female. VIEW SOLUTION
(a) Why are colour blindness and thalassemia categorised as Mendelian disorders ? Write the symptoms of these diseases seen in people suffering from them.
(b) About 8% of human male population suffers from colour blindness whereas only about 0.4% of human female population suffers from this disease. Write an explanation to show how it is possible.ORExplain the process of transcription in prokaryotes. How is the process different in eukaryotes ? VIEW SOLUTION
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