TLS Online TPP Program

#Question id: 2063


In what way do the membranes of a eukaryotic cell vary?

#Unit 2. Cellular Organization
  1. Phospholipids are found only in certain membranes.

  2. Certain proteins are unique to each membrane.

  3. Only certain membranes of the cell are selectively permeable.

  4. Some membranes have hydrophobic surfaces exposed to the cytoplasm while others have hydrophilic surfaces facing the cytoplasm.
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TLS Online TPP Program

#Question id: 27067

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement regarding the stereochemistry of amino acid
1. 16 amino acid except (Thr, Ile, Cys, Gly) L Fischer projection is equal to S and D is equal to R configuration 
2. Thr, Ile is special case because of two chiral center exist in L – Ile/Thr – 2S,3R and D-Ile/Thr–2R,3S configuration  
3. Cys exiest in L- Cys – R & D- Cys – S configuration 
4. Gly is optically inactive 

TLS Online TPP Program

#Question id: 744

#Unit 1. Molecules and their Interaction Relevant to Biology

In a DNA molecule, deoxyribonucleotides are joined into a polymer by the covalent linkage of a phosphate group. The covalent link termed as:

TLS Online TPP Program

#Question id: 745

#Unit 1. Molecules and their Interaction Relevant to Biology

The structure of RNA differs from that of DNA, as RNA contains:

TLS Online TPP Program

#Question id: 746

#Unit 1. Molecules and their Interaction Relevant to Biology

Two separate chains of DNA are wound around each other, each following a helical (coiling) path, resulting in:

TLS Online TPP Program

#Question id: 747

#Unit 1. Molecules and their Interaction Relevant to Biology

In nucleic acids, the bases are covalently attached to the 1-position of a pentose sugar ring, to form a:

TLS Online TPP Program

#Question id: 748

#Unit 1. Molecules and their Interaction Relevant to Biology

The bond between the bases and the sugars in DNA referred as: