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TLS Online TPP Program

#Question id: 601

In a ping-pong reaction which does not occur?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. One product is released before a second substrate is bound.

  2. The enzyme covalently binds a portion of the first substrate.

  3. The enzyme is permanently converted to an altered form by the first substrate.

  4. A group is transferred from one substrate to another.

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TLS Online TPP Program

#Question id: 18903

#Unit 13. Methods in Biology

For imaging purpose, a specialized gamma camera is used to detect the radiation throughout the body. Most used techniques in nuclear imaging are 
TLS Online TPP Program

#Question id: 11279

#Unit 10. Ecological Principles

Ecosystem A: Actual link 10, number of species 15  

Ecosystem B: Actual link 10, number of species 20   

Connectance of ecosystem A and B
TLS Online TPP Program

#Question id: 12905

#Unit 13. Methods in Biology

Some gene/protein is used to identify the Disorder in humans
Match them correctly:
1. Tyrosine Kinase(TK)                        i. Atherosclerosis
2. HIV transactivator                          ii. Hypertension
3. Angiotensinogen                            iii. Kaposis Sarcoma
4. CET protein                                      iv. Cardiac Hypertrophy
TLS Online TPP Program

#Question id: 29030

#Unit 11. Evolution and Behavior

Some animas have ability that  extend to reasoning, problem solving, tool used, and symbolic  communication is called___
TLS Online TPP Program

#Question id: 1257

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to protein kinase A which phosphorylates multiple intracellular target proteins expressed in different cell types.

A. Inactive PKA is a tetramer consisting of two regulatory (R) subunits and two catalytic (C) subunits.

B. Each R subunit contains a pseudo-substrate domain whose sequence resembles that of a peptide substrate and binds to the active site in the catalytic domain but is not phosphorylated; thus the pseudo-substrate domain inhibits the activity of the catalytic subunits.

C. active PKA is turned off by binding of cAMP Each R subunit has two distinct cAMP-binding sites, called CNB-A and CNB-B.

D. Binding of cAMP by an R subunit of PKA occurs in a cooperative fashion; that is, binding of the first cAMP molecule to CNB-B increases the Kd for binding of the second cAMP to CNB-A. Thus small changes in the level of cytosolic cAMP can cause proportionately large changes in the number of dissociated C subunits and, hence, in cellular kinase activity.

Which of the following statements are incorrect?