Two transesterification reactions takes place for 2 exon -1 intron configuration. Choose the correct  statement 

a. First transesterification is always caused by exon 1 -3’OH

b. second transesterification is catalysed variably either by external G or branch point while .

c. First transesterification is catalysed variably either by external G or branch point while 

d. second transesterification is always caused by exon 1 -3’OH.

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#Question id: 2321

#Unit 2. Cellular Organization

The endosymbiont theory proposes that chloroplasts and mitochondria evolved from ________ and were engulfed by larger ________.

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#Question id: 28675

#Unit 2. Cellular Organization

What will be the result of combination of two positive feedback loops? 

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#Question id: 3945

#Unit 3. Fundamental Processes

About 30% of point mutations (substitutions) that occur in coding regions of DNA are harmless. Why?

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#Question id: 10478

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the following amino acids with their structure?

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#Question id: 33432

#Unit 1. Molecules and their Interaction Relevant to Biology

Complete oxidation of 17C fatty acids generates