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TLS Online TPP Program

#Question id: 4132

In E. coli, aminoacyl-tRNA synthetases:

#XL - T Zoology

  1. activate amino acids in 12 steps

  2. are amino acid–specific; there is at least one enzyme specific for each amino acid.

  3. fall into two classes, each of which attaches amino acids to different ends of the tRNA.

  4. have no proofreading activities.

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TLS Online TPP Program

#Question id: 15527

#XL - S Microbiology

CD4 and CD8 T cells leave the thymus and enter the circulation as resting cells in which stage of the cell cycle?
TLS Online TPP Program

#Question id: 12725

#XL - S Microbiology

Match the following

DNA form

Helix Direction

Number of bases per helix turn

1. B

a. Left Handed

i. 10

2.  A

b. Right Handed

ii. 12

3.  C

c. Left Handed

iii. 14

4. Z

d. Right Handed

iv. 9
TLS Online TPP Program

#Question id: 19864

#XL - P Chemistry

If the energy of electron in H atom is given by expression, − 1312/n2 kJ mol-1, then the energy required to excite the electron from ground state to second orbit is
TLS Online TPP Program

#Question id: 10769

#XL - T Zoology

In merabilis jalapa plant red plant RR Cross with white plant rr. In F1 generation the phenotype obtained was Rr Pink. Which type of cross it is
TLS Online TPP Program

#Question id: 4932

#XL - T Zoology

Which of the following is the best hypothesis regarding origins of nucleic acids?