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TLS Online TPP Program

#Question id: 7127

The immunoglobulin genes are expressed in B-cells, and the b-globin gene is expressed in red blood cells. What manipulations might be carried out to get the b-globin gene to be expressed in B-cells?

#Unit 5. Developmental Biology
  1. The coding region of an immunoglobulin gene could be combined with the cis-regulatory region of the b-globin genes, and this artificial gene would then express b-globin in B-cells.
  2. The cis-regulatory region of the b-globin gene could be inserted into B-cells, which would then express their own version of the b-globin gene.
  3. The cis-regulatory region of an immunoglobulin gene could be combined with the coding region of the b-globin genes, and this artificial gene would then express b-globin in B-cells.

  4. The transcription factors GATA-1 and GATA-2 (which activate the b-globin gene in erythrocytes) could be introduced into B-cells, which would then express their own copy of the b-globin gene.

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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.