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: 2086

#SCPH01 Biochemistry

Which of the following is (are) not present in biomembranes?

#Question id: 1037

#SCPH06 I Botany

In a rapidly multiplying bacterial population, cell numbers increase

#Question id: 11536

#SCPH06 I Botany

IAA has been found to be conjugated to both high- and low-molecular-weight compounds such as,

a) Low-molecular-weight conjugated auxins include esters of IAA with glucose or myo-inositol and amide conjugates such as IAA-N-aspartate

b) High-molecular-weight IAA conjugates include IAAglucan and IAA-glycoproteins found in cereal seeds

c) High-molecular-weight conjugated auxins include esters of IAA with glucose or myo-inositol and amide conjugates such as IAA-N-aspartate

d) Low-molecular-weight IAA conjugates include IAAglucan and IAA-glycoproteins found in cereal seeds

Which of the following is the correct prediction about low-and high-molecular weight ?

#Question id: 6951

#SCPH06 I Botany

In chick development, the cell movement during gastrulation is called:

#Question id: 86

#SCPH05 I Biotechnology

Examine the cyclic D-monosaccharide shown below. The ring structure is the ________ and the linear form of this monosaccharide must be a/an ________.