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TLS Online TPP Program

#Question id: 19759

Which of the following sentence is incorrect for covalent bond ?

#XL - P Chemistry
  1. Strenght of covalent bond depenas upon overlapping at atomic orbitals.
  2. Covalent bond is not directional.
  3. There is sharing of electrons between atoms bonded by covalent bond
  4. Covalent bond is formed between atoms having less difference in their electronegativity.
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TLS Online TPP Program

#Question id: 2659

#XL - T Zoology

The correct option regarding the lac operon in E.coli from the following is
TLS Online TPP Program

#Question id: 2660

#XL - T Zoology

In the lactose operon, the molecule that causes the repressor to fall off the promoter is which of the following?
TLS Online TPP Program

#Question id: 2661

#XL - T Zoology

In the histidine operon, if the codons coding for histidine were removed, which of the following would you predict would happen?
TLS Online TPP Program

#Question id: 2662

#XL - T Zoology

In the tryptophan operon, tryptophan serves as ________________.
TLS Online TPP Program

#Question id: 2663

#XL - T Zoology

A ______________ is a collection of clones that, among themselves, contain all the DNA sequences of the organism.
TLS Online TPP Program

#Question id: 2664

#XL - T Zoology

Which of the following is an example of positive gene regulation?