When the two antiparallel strands of DNA are held together partly by the weak forces between complementary bases and partly by hydrophobic interaction between adjacent , stacked base pairs termed as_____

#Question id: 18679

#SCPH01 Biochemistry

#Question id: 53

#SCPH05 I Biotechnology

Calculate the number of times the DNA of a modern E. coli cell has been copied accurately since its earliest bacterial precursor cell arose about 3.5 billion years ago. Assume for simplicity that over this time period, E. coli has undergone, on average, one cell division every 12 hours (this is an overestimate for modern bacteria, but probably an underestimate for ancient bacteria).

#Question id: 2664

#SCPH06 I Botany

Which of the following is an example of positive gene regulation?

#Question id: 831

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

Lysosomes therefore also have a selective pathway, which is activated that imports and degrades cytosolic proteins containing the pentapeptide sequences such as;

#Question id: 4765

#SCPH01 Biochemistry

The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?