GATE –XL Previous Papers - 2009

GATE Previous Papers - 2009
XL-Life Sciences

Chemistry (Compulsory) -- 2009
Biochemistry -------------- 2009
Biotechnology ------------- 2009
Botany -------------------- 2009
Microbiology -------------- 2009
Zoology ------------------- 2009

Life Science Tutorial Animations

Chemistry animation

http://www.chem.lsu.edu/htdocs/people/jchogan/CHEM_1201/animation_links.html

 

Biology lectures videos

http://ocw.mit.edu/OcwWeb/Biology/7-012Fall-2004/VideoLectures/index.htm

 

PCR Mutagenesis

http://www.sciencemedia.com/website/demos/biochem/PCRMutagenesis.html

 

Genetic Engineering of Insulin

http://www.abpischools.org.uk/res/coResourceImport/modules/hormones/en-flash/geneticeng.cfm

 

Gel Filtration Chromatography

http://www.wiley.com/college/fob/quiz/quiz05/5-6.html

 

Ion-exchange Chromatography

http://www.wiley.com/college/fob/quiz/quiz05/5-5.html

 

Enzyme-linked Immunosorbent Assay

http://www.wiley.com/college/fob/quiz/quiz05/5-3.html

 

The Mechanism of the RuBP Carboxylase Reaction

http://www.wiley.com/college/fob/quiz/quiz18/18-22.html

 

PHOTOSYNTHESIS & ETC

 http://highered.mcgraw-hill.com/olc/dl/120072/bio13.swf

CSIR UGC NET life sciences June 2007 paper

CSIR UGC NET life sciences previous papers (All are based on memory only)

CSIR syllabus  DOWNLOAD

CSIR UGC NET paper I  JUNE 2007        DOWNLOAD

CSIR UGC NET life sciences December 2007 paper

CSIR UGC NET life sciences previous papers (All are based on memory only)

CSIR syllabus  DOWNLOAD

CSIR UGC NET paper I  DECEMBER 2007         DOWNLOAD

CSIR UGC NET life science June 2008 paper

CSIR UGC NET life sciences previous papers (All are based on memory only)

CSIR syllabus  DOWNLOAD

CSIR UGC NET paper I  June 2008          DOWNLOAD

CSIR UGC NET December 2008 paper

CSIR UGC NET life sciences previous papers

CSIR syllabus  DOWNLOAD

CSIR UGC NET paper I  December 2008          DOWNLOAD

CSIR NET Life sciences previous papers

CSIR UGC NET life sciences previous papers

CSIR syllabus  DOWNLOAD

CSIR UGC NET paper I  JUNE 2009          DOWNLOAD

Historical Aspects of nucleic acids

• Frederick meischer (1868) first identified phosphate rich substances in hospital bandages puss cells. He had considered phosphate rich substances are called “Nuclein”.
• Alberecht Kossel (Nobel prize, 1910) differentiated RNA and DNA in 1882.
• In 1906, Kossel described the 4 bases in nucleic acids.
• The term “Nucleic acid” was first coined by the scientist “Altmann”. The name given based on two characters one is based on the location (Nucleous-“Nucleic”) and nature (Acidic nature-“Acid”). The literal meaning is “the acidic phosphate rich substances present in Nucleous”, so the name was given as NUCLEIC ACID.
• In 1931, Barbara McClintock showed the rearrangement of genes or mobile genes in chromosomes in corn (Nobel prize, 1983).
• X-ray crystallographic studies on DNA by Maurice wilkins (Nobel prize, 1962) showed he details of structure of DNA.
• Rosalind Franklin worked out the helical structure of DNA.
• James Watson and Francis Crick in 1953 deduced the double helical structure of DNA (Nobel prize 1962).

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