Mutations occur at the same rate in both exons and introns, but 

a) If unwanted mutations occur at exons they are conserved more effectively by selection

b) Exons are negatively selected when undergo mutation

c) Introns may more freely accumulate point substitutions and other changes due to no selection pressure. 

d) exon mutations are eliminated more effectively by selection.

Which of the above is true regarding introns and exons 

#Question id: 11487

#Unit 1. Molecules and their Interaction Relevant to Biology

Glycosidic bonds have Ф, Ψ and w angles due to

#Question id: 523

#Unit 1. Molecules and their Interaction Relevant to Biology

Compared to pyruvate, the carbon atoms in lactate ________.

#Question id: 1890

#Unit 4. Cell Communication and Cell Signaling

Anaphylaxis can be triggerred by cross-linking of IgE receptors on:

#Question id: 1537

#Unit 4. Cell Communication and Cell Signaling

Transformation of mature cells may also occur due to aberrant expression of stemness genes, resulting in cell clones with a dedifferentiated phenotype and self-renewing capacity resembling stem cells. Recent experimental evidence supporting this proposal has been provided with the induction of adult somatic cells into pluripotent stem (iPS) cells through ectopic expression of four genes encoding the pluripotency factors Oct4 and Sox2, the transcription factor Klf4, and the oncoprotein c-Myc in mouse or human fibroblasts. However, along with pluripotency comes the capability of generating teratomas. On the basis of the above information which of the following outcome is most appropriate?

#Question id: 18591

#Unit 11. Evolution and Behavior