TLS Online TPP Program

#Question id: 4002


Which statement is false about operons that have the feature of catabolic repression?

#Unit 3. Fundamental Processes
  1. Several different multisubunit repressors can block the transcription of such an operon.

  2. Operons with catabolic repression have characteristically weak promoters.

  3. Their transcription is lowered in the presence of glucose.

  4. Transcription of such an operon is increased as the concentration of cAMP increases.

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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.

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