Let P = and   be two matrices.  Then the rank of P + Q is 

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#Question id: 12691

#General Aptitude

If the area of a rectangle be (x^2 +7x + 10) sq. cm, then one of the possible perimeter of it is

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#Question id: 12725

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Match the following

DNA form	Helix Direction	Number of bases per helix turn
1. B	a. Left Handed	i. 10
2.  A	b. Right Handed	ii. 12
3.  C	c. Left Handed	iii. 14
4. Z	d. Right Handed	iv. 9

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#Question id: 12726

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Name the forms of DNA which have been derived under laboratory conditions.

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#Question id: 12727

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Name the form of DNA which may be produced with a DNA sequence made up from alternating purine and pyrimidine nucleotides.

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#Question id: 12728

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Name the type of RNA which folds up to give a cloverleaf secondary structure.

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#Question id: 12729

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

When the two antiparallel strands of DNA are held together partly by the weak forces between complementary bases and partly by hydrophobic interaction between adjacent , stacked base pairs termed as_____