Correct statement about two striking structural changes are seen in the enzyme upon isomerization from the closed to the open complex;

A. First, the pincers at the front of the enzyme clamp down tightly on the downstream DNA.

B. Second, there is a major shift in the position of the amino-terminal region of s. When not bound to DNA, s region 3.2 lies within the active center cleft of the holoenzyme, blocking the path that, in the open complex, is followed by the template DNA strand.

C. In the open complex, region 1.1 shifts some 50 A˚ and is now found on the outside of the enzyme, allowing the DNA access to the cleft.

D. Region 1.1 of s is highly negatively charged ( just like DNA).

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#Question id: 10346

#Unit 6. System Physiology – Plant

Nitrite reductase will convert nitrite to ammonium. There are two types of nitrite reductase characteristics given below;

a) Both nitrite reductase consist of a single 63kD polypeptide

b) In leaf chloroplasts and root plastids contain different forms of the nitrite reductase enzyme

c) In shoot nitrite reductase directly dependent on the light reaction by the ferredoxin, it activates nitrite reductase in choloroplast

d) NADPH in the roots is provided by pentose phosphate pathway, it also activate nitrite reductase in the plastids

Which of the correct statement about nitrite reductase characteristics?

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#Question id: 2395

#Unit 2. Cellular Organization

Which structure is not part of the endomembrane system?

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#Question id: 27064

#Unit 1. Molecules and their Interaction Relevant to Biology

These are three amino structure acid given below choose the correct option regarding the stereochemistry of these fig. 

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#Question id: 7468

#General Aptitude

At what time after 2 o’ clock, the hour and the minute hands will lie coincide?

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#Question id: 28180

#Unit 5. Developmental Biology

Prospective potency is greater than prospective fate is determined by___