Practice Questions

TLS Online TPP Program

#Question id: 27349

Why do bacteria have CRISPR? Check all that apply.

#XL - T Zoology

To be able to remember which viruses they have been infected with
To be able to edit virus DNA
To cut apart virus DNA thereby stopping the virus infection
To be able to edit their own DNA

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TLS Online TPP Program

#Question id: 20142

#XL - P Chemistry

Energy equivalent of 10.00 cm^–1 is

TLS Online TPP Program

#Question id: 20143

#XL - P Chemistry

The ratio of energy of the electron in ground state of hydrogen to the electron in first excited state of Be⁺³ is

TLS Online TPP Program

#Question id: 20144

#XL - P Chemistry

The shortest wavelength of H-atom in Lyman series is x, then longest wavelength in Balmer series of He⁺ is

TLS Online TPP Program

#Question id: 20145

#XL - P Chemistry

The radius of first Bohr orbit is , then de-Broglie wavelength of electron in 3rd orbit is nearly

TLS Online TPP Program

#Question id: 20146

#XL - P Chemistry

With increasing principle quantum number, the energy difference between adjacent energy levels in H atom

TLS Online TPP Program

#Question id: 20147

#XL - P Chemistry

The electrons present in K-shell of the atom will differ in