When lichens grow on bare rock, they may eventually accumulate enough organic material around them to supply the foothold for later rooted vegetation. These early pioneering lichens can be said to do what to the later arrivals?

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#Question id: 2091

#Unit 2. Cellular Organization

Proteins can be attached to the phospholipid bilayer plasma membrane by covalently linked hydrocarbon groups. Which of the following mechanisms are not employed in this anchoring?

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#Question id: 23545

#General Aptitude

Deemed Universities declared by UGC under Section 3 of the UGC Act 1956, are not permitted to

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#Question id: 945

#Unit 1. Molecules and their Interaction Relevant to Biology

A key precursor in the synthesis of aromatic amino acids (tryptophan, tyrosine and phenylalanine) is ________.

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#Question id: 16120

#Unit 7. System Physiology – Animal

Following statements are regarding to the regulation of body temperature.

A. The temperature-regulating center is located in the anterior hypothalamus. This center receives information about environmental temperature from thermoreceptors in the skin and about core temperature from thermoreceptors in the anterior hypothalamus itself.

B. The temperature-regulating center is located in the posterior hypothalamus. This center receives information about environmental temperature from thermoreceptors in the posterior hypothalamus itself and about core temperature from thermoreceptors in the skin.

C. If core temperature is below the set-point temperature, then heat-generating and heat-retaining mechanisms are activated.

D. If core temperature is above the set-point temperature, then heat-dissipating mechanisms are activated.

E. If core temperature is below the set-point temperature, then heat-dissipating mechanisms are activated.

F. If core temperature is above the set-point temperature, then heat-generating and heat-retaining mechanisms are activated.

Which of the following combination is correct?

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#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: