In the holoenzyme, which sigma region acts as a molecular mimic of DNA?

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#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

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#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

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#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.

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#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?

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#Question id: 27376

#Unit 1. Molecules and their Interaction Relevant to Biology

The number of neutrons is equal to

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#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.