The DNA binding motif for many prokaryotic regulatory proteins, such as the lac repressor, is:

#Question id: 10900

#SCPH06 I Botany

companion cells in minor veins of mature leaves. All three cell types have dense cytoplasm and abundant mitochondria, there are three types companion cells  present in column A while its characteristics given in column B;

             COLUMN A                                                               COLUMN B

A) Ordinary companion cells             i) appear well suited for taking up solutes via cytoplasmic connections numerous plasmodesmata connecting them to bundle sheath cells. Its having numerous small vacuoles, as well as poorly developed thylakoids.

B) Transfer cells                                 ii) have chloroplasts with well-developed thylakoids     and a cell wall with a smooth inner surface. The number of plasmodesmata connecting ordinary companion cells to surrounding cells.

 C) Intermediary cells                          iii) the development of fingerlike wall in growths, particularly on the cell Walls. These wall ingrowths greatly increase the surface area of the transfer cell’s  plasma membrane, few plasmodesmata connect this type of companion cell to any of the surrounding cells except its own sieve element.

Which of the following correct combination;

#Question id: 2717

#SCPH05 I Biotechnology

To reseal the DNA backbone where does topoisomerase gets the energy from?

#Question id: 8901

#SCPH28 | Zoology

#Question id: 17815

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

#Question id: 12933

#SCPH01 Biochemistry