Which of the following is characteristic of the events occurring at an excitatory synapse?

#Question id: 10359

#SCPH05 I Biotechnology

Nitrate reductases of higher plants are composed of two identical subunits, each containing three prosthetic groups. Which of the following is not the prosthetic group of nitrate reductase;

#Question id: 10791

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

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?

#Question id: 9577

#SCPH06 I Botany

#Question id: 2749

#SCPH05 I Biotechnology

Approximately what proportion of the human genome is made up of repetitive DNA sequences?

#Question id: 15139

#SCPH05 I Biotechnology