Practice Questions

TLS Online TPP Program

#Question id: 58

A covalent chemical bond is one in which ________.

#Section C (Domain-Specific Knowledge)

electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged
protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms
outer-shell electrons of two atoms are shared so as to satisfactorily fill their respective orbitals
outer-shell electrons of one atom are transferred to fill the inner electron shell of another atom

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TLS Online TPP Program

#Question id: 27066

#Section C (Domain-Specific Knowledge)

Determine R and S Configurations On A Fischer Projection given below

TLS Online TPP Program

#Question id: 27067

#Section C (Domain-Specific Knowledge)

Choose the correct statement regarding the stereochemistry of amino acid

1. 16 amino acid except (Thr, Ile, Cys, Gly) L Fischer projection is equal to S and D is equal to R configuration

2. Thr, Ile is special case because of two chiral center exist in L – Ile/Thr – 2S,3R and D-Ile/Thr–2R,3S configuration

3. Cys exiest in L- Cys – R & D- Cys – S configuration

4. Gly is optically inactive

TLS Online TPP Program

#Question id: 27068

#Section C (Domain-Specific Knowledge)

Isoleucine and Threonine have two chiral carbons so exists in multiple RS configuration, choose the correct option regarding the given fig.

1. a is D-threonine is (2S, 3S) threonine

2. b is L-threonine is (2R,3S) threonine

3. a is L-threonine is (2S, 3R) threonine

4. b is D-threonine is (2R,3S) threonine

TLS Online TPP Program

#Question id: 27069

#Section C (Domain-Specific Knowledge)

Choose the correct option regarding the stereochemistry of given compound

TLS Online TPP Program

#Question id: 27070

#Section C (Domain-Specific Knowledge)

Which of the following statements is correct regarding the stereochemistry of Thr, Ile

1. Thr, Ile is special case because of two chiral center exist in L-Ile in 2R,3S and L-Thr in 2R,3S configuration

2. Thr, Ile is special case because of two chiral center exist in D-Ile in 2R,3S and D-Thr in 2R,3S configuration

3. Thr, Ile is special case because of two chiral center exist in L–Ile in 2S,3R and L–Thr in 2S,3R

4. Thr, Ile is special case because of two chiral center exist in D–Ile in 2S,3R and D–Thr in 2S,3R

TLS Online TPP Program

#Question id: 1232

#Section C (Domain-Specific Knowledge)

Which of the following mutations might confer a competitive advantage to an athlete by raising his or her hematocrit?

a. excess production of erythropoietin

b. decreased production of erythropoietin

c. EpoR that cannot bind STAT5

d. EpoR that cannot bind SHP1

e. EpoR that cannot bind JAK2