4. You propose a set of experiments to test whether present-day chloroplasts ori

Question

4. You propose a set of experiments to test whether present-day chloroplasts originated from a single or multiple endosymbiotic events. Which set of experiments below would provide the most detailed test of the hypothesis? a. Testing whether both plants and algae are similarly pigmented at the 200 nm resolution of light microscopy b. Testing whether both plants and algae have chloroplasts that look the same at the 4 nm resolution of electron microscopy c. Using an instrumental test to determine if the wavelengths of light absorption by chloroplast pigments are the same in both plants and algae d. Using structural chemistry to test if the light absorbing group of the photopigments in both plants and algae are the same e. Compa full range of genome-encoded molecules ring the genome of plant and algal chloroplasts to determine how related are the production

Explanation / Answer

The correct option is e) Comparing the genome of plant and algal chloroplasts to determine how related are the full range of genome-encoded molecules.

Because most cells contain thousands of ribosomes, rRNA is the most abundant form of RNA in living cells and
is suitable for comparing even distantly related species. For example- 16S rRNA gene which codes for 16S rRNA (a component of the 30S small subunit of a prokaryotic ribosome that binds to the Shine-Dalgarno sequence) is used in reconstructing phylogenies, due to the slow rates of evolution of this region of the gene.

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