The absorption of UV light by nucleic acids arises from n!p* and p!p* transitions of the purine (adenine, guanine) and pyrimidine (cytosine, thymine, uracil) bases that occur between 260 nm and 275 nm. 

TLS Online TPP Program

#Id: 8583

#Unit 2. Cellular Organization

Lamins 

contribute to genome organization as well as to the rigidity of the nucleus through linkages to the

cytoskeleton involving proteins with SUN and KASH domains

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#Id: 9828

#Unit 6. System Physiology – Plant

phyC, phyD, and phyE appear to play roles that are for the most part redundant with those of phyA and phyB. Whereas phyB appears to be involved in regulating all stages of development

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#Id: 6097

#Unit 3. Fundamental Processes

The shifts of hydrogen atoms between the number 3 and number 4 positions of the pyrimidines and between the number 1 and number 6 positions of the purines change their base-pairing potential due to Tautomeris

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#Id: 6741

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 9842

#Unit 6. System Physiology – Plant

Cryptochromes under blue light causes

1.Suppression of hypocotyl elongation

2.Promotion of cotyledon expansion

3.Membrane depolarization

4.Inhibition of petiole elongation

5.Anthocyanin production

6.Circadian clock entrainment