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: 6996

#Unit 5. Developmental Biology

During metamorphosis, a tadpole's tail is reduced in size by the process of ________.

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#Question id: 31270

#Unit 4. Cell Communication and Cell Signaling

Gain-of-function mutation in which gene will bypass restriction point controls?

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#Question id: 12433

#Unit 10. Ecological Principles

The Hubbard Brook watershed deforestation experiment yielded all of the following results except that

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#Question id: 4695

#Unit 3. Fundamental Processes

snRNAs undergo specific post-transcriptional modifications, such as pseudouridinylylation and the addition of methyl groups. These modifications occur in__A__,  where they are directed by__B_.

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#Question id: 12429

#Unit 10. Ecological Principles

Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.

Which of the following organisms is incorrectly paired with its trophic level?