Practice Questions

TLS Online TPP Program

#Question id: 2726

Which property is shared by the five histone proteins?

#Unit 2. Cellular Organization

They are acidic proteins with relatively large molecular weights.
They are multimeric proteins with high levels of Arg and Lys.
They are fibrous proteins with high amounts of α-helix.
They are globular proteins with a positive charge.

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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.

TLS Online TPP Program

#Question id: 27375

#Unit 1. Molecules and their Interaction Relevant to Biology

An atom of sodium has an atomic number of 11 and a mass number of 23. Which of the following statements is correct?

TLS Online TPP Program

#Question id: 27376

#Unit 1. Molecules and their Interaction Relevant to Biology

The number of neutrons is equal to

TLS Online TPP Program

#Question id: 27377

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the number of electrons, protons and neutrons in 1 mole of 16O⁻² ions.