Class 12th Biology 2011 Set1 Delhi Board Paper Solution
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Q1 Name the type of cell division that takes place in the zygote o...
Q2 Write the scientific name of the microbe used for fermenting ma...
Q3 Write the unit used for measuring ozone thickness.
Q4 Name the event during cell division cycle that results in the g...
Q5 How can bacterial DNA be released from the bacterial cell for b...
Q6 Write the importance of cryopreservation ín conservation of bio...
Q7 Mention the role of the codons AUG and UGA during protein synth...
Q8 Normally one embryo develops in one seed but when an orange see...
Q9 How do histones acquire positive charge?
Q10 Why is CuT considered a good contraceptive device to space c...
Q11 Differentiate between albuminous and non-alburninous seeds, giv...
Q12 Explain the process of RNA interference.
Q13 List the key tools used in recombinant DNA technology.
Q14 Name the two types of immune systems in a human body. Why are c...
Q15 Justify with the help of an example where a deliberate attempt ...
Q16 Identify A, D, E and F in the diagram of an antibody molecule g...
Q17 Study the graph given below. Explain how is oxygen concentratio...
Q18 Explain how a hereditary disease can be corrected. Give an exam...
Q19 Draw a diagram of a male gametophyte of an angiosperm. Label an...
Q20 How are dominance, codominance and incomplete dominance pattern...
Q21 The base sequence in one of the strands of DNA is TAGCATGAT.
Q22 (a) Sickle celled anaemia in humans is a result of point mutati...
Q23 What is inbreeding depression and how is it caused in organisms...
Q24 (a) Identify A and B illustrations in the following: ...
Q25 The diagram above is that of a typical biogas plant. Explain th...
Q26 How can crop varieties be made disease resistant to overcome fo...
Q27 Name the type of interaction seen in each of the following exam...
Q28 (a) Draw a labelled diagram of the human female reproductive sy...
Q29 Explain the salient features of Hugo de Vries theory of mutatio...
Q30 (a) Explain primary productivity and the factors that influence...
Question 12
Explain the process of RNA interference.
Answer
RNA interference or RNAi, it is present in all eukaryotic organisms as a part of their cellular defense. It undergo the process of silencing of mRNA by dsRNA. Complementary RNA can be isolated from infected virus with RNA genome.
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