Processing of pre-rRNA transcripts (30S)  in bacteria, after the modification and cleavage produces mature RNAs is

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#Question id: 19299

#Unit 12. Applied Biology

A new patented technology that permits a rapid and effective elucidation of functions of unknown genes/DNA sequences. 

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#Question id: 15768

#Unit 5. Developmental Biology

A stem cell has the power to produce many different types of differentiated cells. This phenomenon is known as

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#Question id: 4941

#Unit 11. Evolution and Behavior

Which of the factors below weaken the hypothesis of abiotic synthesis of organic monomers in early Earthʹs atmosphere?

1.  the relatively short time between intense meteor bombardment and appearance of the first life forms

2.  the lack of experimental evidence that organic monomers can form by abiotic synthesis

3.  Uncertainty about which gases comprised early Earthʹs atmosphere

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#Question id: 15523

#Unit 4. Cell Communication and Cell Signaling

The appearance of ϒδ thymocytes and αβ thymocytes during mouse fetal development. Fetal animals generate

a) more αβ T-cells than ϒδ T-cells

b) the proportion of ϒδ T-cells generated drops off dramatically after birth

c) the proportion of αβ T-cells generated drops off dramatically after birth

d) more ϒδ T-cells than αβ T cells

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#Question id: 19228

#Unit 12. Applied Biology

A physical gene transformation method that can be used only with plant cell protoplasts that can be regenerated into viable plants