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TLS Online TPP Program

#Question id: 10144

Choose the incorrect statements about photosynthesis dark reaction ?

#Section 2: General Biology
  1. The light dependent enzymes which are activated by Ferredoxin–thioredoxin system, contain oxidised di-sulfide bonds (—S—S—) in its active form
  2. C3 cycle or Calvin–Benson cycle is regulated by Photosystem I
  3. The activation of enzymes of the Calvin– Benson cycle starts in the light with the reduction of ferredoxin by the photosynthetic electron transport chain (Chl)
  4. The series of Ferredoxin–thioredoxin system in presence of light is,  2 Ferredoxin (oxidized) to 2 Ferredoxin (reduced)→ Trx(s−s) to Trx(SH) → Ferredoxin– thioredoxin reductase (s−s) to Ferredoxin– thioredoxin reductase(SH)→ Enzyme (inactive)(s−s) to Enzyme (active)(SH)
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TLS Online TPP Program

#Question id: 12999

#Section 2: General Biology

Proline and glycine both disturb the symmetry of α-helix which of the following are true regarding to these two amino acids
a) proline changes the orientation of hetropolymeric α-helix hence proline can be placed only as 1st amino acid residue near to C-terminus 
b) proline changes the orientation of polymeric α-helix hence proline can be placed only as 1st amino acid residue near to N-terminus
c) glycine disrupts the heteropolymeric α-helix by changing the helicity.
d) homopolymer of proline and glycine can form stable helix. 
TLS Online TPP Program

#Question id: 13000

#Section 2: General Biology

Identify the correct statement regarding the structure
TLS Online TPP Program

#Question id: 13001

#Section 2: General Biology

Which of the following is incorrect 
a) antiparallel β sheets are frequently found and they are quite more stable because of more no. hydrogen bond presence and linear H bonding pattern.
b) antiparallel β sheets are frequently found and they are quite more stable because of more no. hydrogen bond presence and having distorted H bonding pattern.
c) parallel β sheets are relatively less stable and mostly found in core of protein.
d) parallel β sheets are relatively more stable and mostly found in core of protein.
TLS Online TPP Program

#Question id: 13023

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Which of the following enzymes are required for end labelling?
TLS Online TPP Program

#Question id: 13024

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Inset and the vector can be ligated if they are digested by a pair of –
TLS Online TPP Program

#Question id: 13025

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Which enzyme is used for homopolymer tailing?