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TLS Online TPP Program

#Question id: 16957

the immune system can be summarized as follows. Which is not correct for immune system?

#Unit 4. Cell Communication and Cell Signaling
  1. A cell can become more or less susceptible to the actions of a ligand by increasing (up-regulating) or decreasing (down[1]regulating) the expression of the receptor for that li
  2. Ligand binding to the receptor induces a molecular change in the receptor. This change may be in the form of a conformational alteration in the receptor, receptor dimerization or clustering, a change in the receptor’s location in the membrane, or a covalent modification.
  3. a cell must not receive more than one signal through more than one receptor in order to effect a particular outcome.
  4. Integration of all the signals received by a cell occurs at the molecular level inside the recipient cell.
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TLS Online TPP Program

#Question id: 27210

#Unit 1. Molecules and their Interaction Relevant to Biology

Charge on one mol of electron is approximately equal to
TLS Online TPP Program

#Question id: 27211

#Unit 1. Molecules and their Interaction Relevant to Biology

 A biological redox reaction always involves
TLS Online TPP Program

#Question id: 27226

#Unit 1. Molecules and their Interaction Relevant to Biology

The Protein Components of the Mitochondrial Electron-Transfer Chain match them correctly with their prosthetic groups 
TLS Online TPP Program

#Question id: 27357

#Unit 6. System Physiology – Plant

Chlorophyll can exist in three state in many state which state have no unpaired electron are found
TLS Online TPP Program

#Question id: 27358

#Unit 6. System Physiology – Plant

Choose the correct statement regarding singlet and triplet state
1. singlet state is short lived, net angular momentum and spin quantum number, s is zero
2. singlet state is long lived, net angular momentum and spin quantum number, s is one
3. Triplet state is long lived , net angular momentum and spin quantum number, s is one
4. Triplet state is short lived net angular momentum and spin quantum number, s is zero
TLS Online TPP Program

#Question id: 27374

#Unit 13. Methods in Biology

An aqueous solution contains two compounds X and Y. This solution gave absorbance values of 1.0 and 0.4 at 220 and 280 nm, respectively, in a 1 cm path length cell. Molar absorption coefficients (ε) of the compounds X and Y are as shown in the table below.

The concentration of Y in the solution is___________ mM.