a. HbS (sickle-cell Hb): substitutes a Val for a Glu on the surface

b. Hb Cowtown: eliminates an ion pair involved in T-state stabilization

c. Hb Memphis: substitutes one uncharged polar residue for another of similar size on the surface

d. Hb Bibba: substitutes a Pro for a Leu involved in an α helix

Which Hb variant least likely to cause pathological symptoms

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#Question id: 11148

#Unit 7. System Physiology – Animal

Which of the following ions is most likely to cross the plasma membrane of a resting neuron?

TLS Online TPP Program

#Question id: 19294

#Unit 13. Methods in Biology

The various steps for construction of libraries are ___________

i) Fragmentation of DNA

ii) Isolation of genomic DNA

iii) Amplification

iv) Ligation and introduction to the host

v) Vector preparation

The correct order of construction of libraries is (In the order of starting to ending).

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#Question id: 14950

#Unit 6. System Physiology – Plant

NMR studies of the pectin molecules not indicate that,

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#Question id: 19036

#Unit 13. Methods in Biology

Which of the following is used as a spraying reagent in paper chromatography? 

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#Question id: 4466

#Unit 3. Fundamental Processes

As well as synthesizing the transcript, RNA polymerase performs two proofreading functions on that growing transcript;

i. Pyrophosphorolytic editing

ii. Hydrolytic editing

Choose correct processes accordingly,

A. The polymerase backtracks by one or more nucleotides and cleaves the RNA product, removing the error-containing sequence.

B. In this, the enzyme uses its active site, in a simple back-reaction,

C. Catalyze the removal of an incorrectly inserted ribonucleotide, by reincorporation of PPi

D. The enzyme can then incorporate another ribonucleotide in its place in the growing RNA chain.