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TLS Online TPP Program

#Question id: 3842

Which of the following statements correctly describes the difference between the leading strand and the lagging strand in DNA replication?

#Unit 3. Fundamental Processes

  1. The leading strand is synthesized in the 3' → 5' direction in a discontinuous fashion, while the lagging strand is synthesized in the 5' → 3' direction in a continuous fashion.

  2. The leading strand is synthesized continuously in the 5' → 3' direction, while the lagging strand is synthesized discontinuously in the 5' → 3' direction.

  3. The leading strand requires an RNA primer, whereas the lagging strand does not.

  4. There are different DNA polymerases involved in elongation of the leading strand and the lagging strand.

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TLS Online TPP Program

#Question id: 12990

#Unit 1. Structure and Function of Biomolecules

Choose the incorrect statement related to ionic interactions
a. Ionic interactions takes place between positively and negatively charged amino acids side chain.
b. Ionic interactions takes place between positively and positively charged amino acids side chain.
c. ionic interaction has almost 20 kj/mol of bond energy.
d. ionic interaction is weak interaction that have lowest 20kj/mol of bond energy.
e. strength of ionic bond within protein chain calculated by
 
TLS Online TPP Program

#Question id: 12991

#Unit 1. Structure and Function of Biomolecules

Choose the correct statements
a. Secondary structures are stabilized by hydrogen bonds.
b. Hydrogen bond always formed between non bonded atoms.
c. the folded length of an amino acid in α-helix reduced almost 3 times than linear structure.
d. Only dihedral angle changes during the formation of secondary structure while bond length remains unchanged
TLS Online TPP Program

#Question id: 12992

#Unit 1. Structure and Function of Biomolecules

α-helix changes its configurations according to the environment then
a. membrane encompassing α-helix have nonpolar residue oriented toward the membrane lipid.
b. if α-helix is found in plasm then polar residue will be oriented toward the outside.
c. if α-helix is found in plasm then nonpolar residue will be present inside the core.
d.  membrane encompassing α-helix have polar residue oriented towards the membrane lipid.
Choose incorrect statement
TLS Online TPP Program

#Question id: 12993

#Unit 1. Structure and Function of Biomolecules

Out of these which of the following is true regarding the propensity of α-helix.
a. any amino acid which can take up desirable ϕ and ψ angle close to -57 and -47 will favour the formation of a α-helix
b. amino acid such a proline and glycine have lowest propensity will favour formation of α-helix.
c. if the resultant change in the value ΔΔG0 is positive then it will favour the formation of α-helix.
d. if the resultant change in the value ΔΔG0 is zero or close to zero then it will favour the formation of α-helix.
TLS Online TPP Program

#Question id: 12994

#Unit 1. Structure and Function of Biomolecules

α-helix changes their configurations according to the environment then
a. when found in aqueous or plasm environment 
b. when found in membrane or hydrophobic environment
in the given condition interaction will be 
TLS Online TPP Program

#Question id: 12995

#Unit 1. Structure and Function of Biomolecules

Which of the following constraints affect the stability α-helix, 
a) the intrinsic propensity of an amino acid residue to form an α-helix.
b) the interactions between R groups.
c) the bulkiness of adjacent R groups.
d) the occurrence of Pro and Gly residues.