Practice Questions

TLS Online TPP Program

#Question id: 12324

According to the nonequilibrium model,

#Unit 10. Ecological Principles

Communities will remain in a mature state if there are no human disturbances.
Community structure remains constant in the absence of interspecific competition.
Communities are assemblages of closely linked species that are irreparably changed by disturbance.
Communities are constantly changing after being influenced by disturbances.

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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: