Companion cells transport of photosynthetic products from producing cells in mature leaves to the sieve elements in the minor veins of the leaf. There are at least three different types of companion cells in the minor veins of mature, exporting leaves, All three cell types have dense cytoplasm and abundant mitochondria;

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#Question id: 319

#Unit 1. Molecules and their Interaction Relevant to Biology

London dispersion forces are attractive forces that arise due to

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#Question id: 4322

#Unit 3. Fundamental Processes

If a particular operon encodes enzymes for making an essential amino acid and is regulated like the trp operon, then

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#Question id: 11705

#Unit 7. System Physiology – Animal

Osmoregulatory adjustment via the atrial natriuretic peptide system can be triggered by:

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#Question id: 1270

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a major extracellular molecule in mammals containing no protein portion?

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#Question id: 23383

#General Aptitude

DKY, F J W, HIU, J HS, .....