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TLS Online TPP Program

#Question id: 11655

succession as proceeding to a distinct end point, each phase of succession shown in given diagram (A → D)

#Unit 10. Ecological Principles
  1. Pioneer stage,  B-Pioneer seral stage,  C-Mosses stage,  D-Climax
  2. A-Crustose lichen stage, B-Seral stage,  C- Mosses stage, D- Forest stage
  3. A-Bare ground,  B-Pioneer seral stage,  C-Seral stages,  D-Climax
  4. A-Foliose lichen stage, B- Crustose lichen stage, C-woodland stage, D- Forest stage.
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TLS Online TPP Program

#Question id: 382

#Unit 1. Molecules and their Interaction Relevant to Biology

The molar ratio of sodium acetate to acetic acid in a buffer solution with a pH OF 5.76 is 10:1. Assuming the total buffer concentration is 2.2 X 10-2 mol/L, how many grams of sodium acetate (m.w. 82) and how many grams of acetic acid (m.w. 60) should be used in preparing a litre of the solution?
TLS Online TPP Program

#Question id: 12712

#Unit 6. System Physiology – Plant

ROS using respiratory burst oxidase homolog (RBOH) or NADPH  oxidase for Self- generation mechanism by some other processes , which are involved in ROS generation such as,
A) The amino-terminal cytoplasmic domain of RBOH proteins contains four serines (Ser) that can be phosphorylated by CDPKs and two EF hands that can bind calcium directly 
B) As ROS generation such as  H2O2,  by putting electron for oxidising  oxygen into the free radicals, these electron generation by oxidising NADPH and FADH2 in the cytosolic carboxy terminal of RBOH protein
C) The elevation of calcium and ROS levels during the early stages of the stress response activates protein kinases and phosphatases
D) ROS activated Ca2+ channel leads to Ca2+  influx from apoplastic space  to cytosol
Arrange the correct order of  following steps involve in ROS generation;
TLS Online TPP Program

#Question id: 12909

#Unit 13. Methods in Biology

According to the diagram, arrange the steps in correct order: 


1. DNA is then digested by the Cas9 nuclease at specific points on both DNA strands. 
2. Homologous recombination to repair the break and incorporate the new DNA sequence then follows. 
3.The nuclease Cas9 is targeted to DNA by a guide RNA consisting of a specific 20 nucleotide spacer/targeting sequence (crRNA).
 4. That identifies the DNA to be modified, linked to a trans-activating (tracrRNA) sequence necessary for the recruitment and stability of Cas9 nuclease.
TLS Online TPP Program

#Question id: 12542

#Unit 10. Ecological Principles

Use Figure to answer the following questions. Examine this food web for a particular terrestrial ecosystem. Each letter is a species. The arrows represent energy flow.

Which species is autotrophic?
TLS Online TPP Program

#Question id: 2419

#Unit 2. Cellular Organization

During treadmilling, actin subunits add: