The snoRNAs are 60 to 300 nucleotides long. Many are encoded within the introns of other genes and cotranscribed with those genes. Each snoRNA includes a 10 to 21 nucleotide sequence that is perfectly complementary to some site on an rRNA.

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#Id: 1834

#Unit 11. Evolution and Behavior

Permian- Major mass extinctions, amphibians decline

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#Id: 7210

#Unit 5. Developmental Biology

Class II MHC transcriptional activator called CIITA and another transcription factor called RFX, have both been shown to activate the promoter of class II MHC genes. Defects in these transcription factors cause one form of bare lymphocyte syndrome.

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#Id: 4916

#Unit 1. Molecules and their Interaction Relevant to Biology

Lineweaver-Burk plot showing the effect of competitive inhibition; (b) the same, showing plots for several inhibitor concentrations at fixed enzyme concentrations.

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#Id: 845

#Unit 2. Cellular Organization

Difference between necrotrophy, biotrophy and hemibiotrophy

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#Id: 6949

#Unit 8. Inheritance Biology

Recombination is also reduced within a pericentric inversion. No dicentric bridges or acentric fragments are produced.