Following are certain statements regarding furanocoumarins;

 a) furanocoumarins have an attached furan ring

 b) These compounds are toxic until they are activated by sunlight in the ultraviolet A (UV-A) region (320–400 nm)  

 c) Light activated furanocoumarins can insert themselves into the double helix of DNA and bind to the pyrimidine bases, thus blocking transcription and repair and leading eventually to cell death   

 d) Phototoxic furanocoumarins are especially abundant in members of the Umbelliferae family, including celery, parsnip, and parsley.

 Which of the following combination from the above statements is correct?

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#Question id: 10391

#SCPH06 I Botany

Several of the structural domains in phytochrome, the N-terminal half of phytochrome contains;

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#Question id: 3688

#SCPH05 I Biotechnology

Which of the following enzyme has a unique ability to introduce positive and negative supercoiling of the DNA and it is the target for antibacterial agents such as ciprofloxacin/quinolones?

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#Question id: 4951

#SCPH06 I Botany

The synthesis of new DNA requires the prior existence of oligonucleotides to serve as primers. On Earth, these primers are small RNA molecules. This latter observation is evidence in support of the hypothesized existence of

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#Question id: 17212

#SCPH05 I Biotechnology

In the equation Q = UAΔt; Δt is

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#Question id: 2272

#I Life Science/ Life Sciences Group – I-V

Bacteria may be propelled by