Which of the following statement is correct about PAM matrix? 

#Question id: 12915

#SCPH05 I Biotechnology

#Question id: 2084

#SCPH05 I Biotechnology

Which two organelles are responsible for producing phospholipids and sphingolipids?

#Question id: 7701

#SCPH05 I Biotechnology

The various taxonomic levels (for example, phyla, genera, classes) of the hierarchical classification system differ from each other on the basis of ________

#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: 1107

#SCPH01 Biochemistry

Viagra causes dilation of blood vessels and increased blood flow to the penis, facilitating erection. Viagra acts by inhibiting which of the following events?