Antigen processing for presentation by MHC class II molecules involves:

#Question id: 6998

#SCPH01 Biochemistry

Which of the following is an adult organism that has fewer than 1,000 cells?

#Question id: 15267

#SCPH28 | Zoology

#Question id: 2607

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

The precursor amino acid + enzyme of trp is ;

#Question id: 5259

#SCPH28 | Zoology

Genetic variation in bacterial populations cannot result from

#Question id: 10791

#SCPH05 I Biotechnology

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?