Structural domains in phytochrome are dimeric chromoproteins. The two sub‐units of phytochromes are linked with

#Question id: 13057

#SCPH05 I Biotechnology

#Question id: 10284

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

Allosteric regulation of enzyme multisubunit or multiactive site shows cooperativity with the sigmoidal graph between substerate conc. v/s Activity,

a) Cell contain NADH, FADH2 and ATP, that inhibits the allosteric enzyme activity by lowering the affinity with its substate, graph shifts towards B from control

 b) A- shows low ATP, the Km for fructose 6-phosphate is relatively low, the affinity of the enzyme with its substate is relatively high

 c) Haemoglobin, Phosphofructokinase, Phosphate dehydrogenase complex, α-ketoglutarate dehydrogenase complex, these all enzymes shows characteristics of sigmoidal graph

 d) When ATP is high, Km for fructose 6-phosphate is greatly increased- this activity shown by B in the graph

 e) fructose 2,6-bisphosphate binds to its allosteric site on PFK-1, it increases the enzyme’s affinity for its substrate fructose 6-phosphate and reduces its affinity for the allosteric inhibitors ATP and citrate- shown in graph by A

 Which of the following  combination of the enzyme activity with its substate correctly shown;

#Question id: 2634

#SCPH05 I Biotechnology

Tryptophan, the end-product of the enzymes encoded by the trp operon, therefore acts as a co-repressor and inhibits its own synthesis through:

#Question id: 4600

#SCPH28 | Zoology

Scientific theories ________.

#Question id: 8694

#SCPH28 | Zoology

Which of the following is (are) problematic when the goal is to construct phylogenies that accurately reflect evolutionary history?