Genome size (the length of DNA associated with one haploid complement of chromosomes) varies substantially between different organisms. Because more genes are required to direct the formation of more complex organisms, it is not surprising that genome size is roughly correlated with an organism’s apparent complexity. Which of the following statements is/are correct in reference to this rough correlation?

I. Many organisms of apparently similar complexities have very different genome sizes.

II. The number of genes, rather than genome size, is more closely related to organism complexity.

III. There is a roughly inverse correlation between organism complexity and gene density—the less complex the organism, the higher the gene density.

IV. Gene density in eukaryotic organisms is consistently higher and more variable than in their prokaryotic counterparts.

#Question id: 12337

#Unit 10. Ecological Principles

#Question id: 5171

#General Aptitude

Which of the following is the largest ? 

#Question id: 983

#Unit 1. Molecules and their Interaction Relevant to Biology

The pyrimidine ring system is shown below. What is the source of the C-2 during the de novo biosynthesis of pyrimidines?

#Question id: 11809

#Unit 6. System Physiology – Plant

Shortly after the discovery of kinetin, it was observed that the differentiation of cultured callus tissue derived from tobacco pith segments into either roots or shoots depends on the ratio of auxin to cytokinin in the culture medium. Whereas

a) high auxin:cytokinin ratios stimulated the formation of roots

b) high auxin:cytokinin ratios stimulated the formation of shoots

c) low auxin:cytokinin ratios led to the formation of shoots

d) low auxin:cytokinin ratios stimulated the formation of roots

which of the following combination is correct about the ratio of auxin to cytokinin

#Question id: 4450

#Unit 3. Fundamental Processes

According to the correlation between promoter strength and sequence, in all these promoters which one is seems like very weak promoter or non-existing in any organism