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TLS Online TPP Program

#Question id: 10344

Some of the following caracteristics of Nitrite reductase, which one of the is incorrect?

#SCPH05 I Biotechnology
  1. Nitrite is converted into ammonium by NADPH dependent nitrite reductase
  2. It contain two prosthetic groups: an iron–sulfur cluster (Fe4S4) and a specialized heme.
  3. Nitrite (NO2 – ) is a highly reactive, potentially toxic ion immediately transport from the cytosol into chloroplasts in leaves and plastids in roots
  4. Leaf chloroplasts and root plastids contain same type of the nitrite reductase
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TLS Online TPP Program

#Question id: 10564

#SCPH05 I Biotechnology

The term Ys , called the solute potential or the osmotic potential, represents the effect of dissolved solutes on water potential,

a) The mixing of solutes and water reduces the disorder of the system and thereby lowers free energy

b) Solutes reduce the free energy of water by diluting the water

c) The mixing of solutes and water increases the disorder of the system and thereby lowers free energy

d) Solutes increases the free energy of water by diluting the water

 Which one of the following statements are INCORRECT?
TLS Online TPP Program

#Question id: 13048

#SCPH06 I Botany

In HAT selection surviving cells synthesise nucleotides by means of:
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#Question id: 10797

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

The colored pigments of plants are of two principal types: carotenoids and flavonoids. Given below some statements of about these pigments;

 a) Anthocyanins are colored flavonoids that attract animals

b) Flavonoids are phenolic compounds that include a wide range of colored substances

c) Carotenoids are coloured terpenoid compounds that also serve as accessory pigments in photosynthesis

d) most widespread group of pigmented carotenoids is the anthocyanins, these are glycosides that have sugars. Without their sugars, anthocyanins are known as anthocyanidins

Which of the following is incorrect statements of these pigments;
TLS Online TPP Program

#Question id: 15638

#SCPH28 | Zoology

You have isolated two mutations that show decreased expression of the Lac operon. However, unlike like the promoter mutations, these mutations don’t respond to the inducer IPTG. These mutations, designated Lac3– and Lac4–, are evaluated for the quantity of ß-galactosidase and permease activity expressed with or without IPTG:
 
Mapping experiments reveal that Lac3– and Lac4– are different short deletions located in the region before the start of the LacZ gene. Given the data shown above suggest which genetic element(s) in addition to part of the promoter has been deleted in each mutant. 
TLS Online TPP Program

#Question id: 16104

#SCPH28 | Zoology

The most potent mechanism for increasing heat production is