Biology:2005:CBSE:[All India ]:Set-I
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Q1
Name the heaviest and longest bone in the human body. Marks:1View AnswerAnswer:
Femur is the heaviest and the longest bone in the human body.
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Q2
Which type of UV radiations can be lethal to organisms? Marks:1View AnswerAnswer:
UV-B is the most harmful type of ultra-violet ray for organisms. -
Q3
Why does thinning of bones usually start occurring in human females at about 50 years of age? Marks:1View AnswerAnswer:
Thinning of bones usually start occuring in human females at about 50 years of age due to the decreased levels of estrogen in the female body. Decreased bone mass and increased chances of fracture are the prominent symptoms of osteoporosis. -
Q4
What is polyethylene glycol used for in somatic hybridization? Marks:1View AnswerAnswer:
To induce the fusion of protoplasts. -
Q5
Drosera carries out photosynthesis and still traps insects why? Marks:1View AnswerAnswer:
Drosera grows in nitrogen deficient soil. To fulfill it's requirement the plant traps the insects . -
Q6
What is oxidative decarboxylation? What happens to pyruvate immediately after this reaction? Name the enzyme involed in this reaction. Marks:2View AnswerAnswer:
Out of syllabus -
Q7
Which animals suffer from Rinderpest? Give its two early symptoms and explain how it spreads. Marks:2View AnswerAnswer:
Out of syllabus -
Q8
Explain symbiotic nitrogen fixation in leguminous plants. Marks:2View AnswerAnswer:
Out of syllabus -
Q9
What is cretinism? Give its any two causes. Marks:2View AnswerAnswer:
Out of syllabus -
Q10
What is auxetic growth? Give two examples of organisms showing this kind of growth. Marks:2View AnswerAnswer:
Out of syllabus
