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TLS Online TPP Program

#Question id: 4140

Which of the following statements about bacterial mRNA is true?

#Section 3: Genetics, Cellular and Molecular Biology

  1. A ribosome usually initiates translation near the end of the mRNA that is synthesized last.

  2. An mRNA is never degraded but is passed on to the daughter cells at cell division.

  3. During polypeptide synthesis, ribosomes move along the mRNA in the direction 5'  3'.

  4. Ribosomes cannot initiate internally in a polycistronic transcript.

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TLS Online TPP Program

#Question id: 12998

#Section 2: General Biology

Match with appropriate bonding pattern

Helix typeHydrogen bonding
a. α-helix1. n, n+3
b. 310 helix2. n, n+5
c. π helix3. n, n+4
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 –