What is true of the amino acids that might have been delivered to Earth within carbonaceous chondrites?

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#Question id: 15757

#Unit 12. Applied Biology

Which of the following growth hormones produces apical dominance?

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#Question id: 2946

#Unit 2. Cellular Organization

Which of the following occurs during anaphase A?

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#Question id: 12180

#Unit 2. Cellular Organization

Following statements are regarding to cotransport.

A. The two forces constituting the electrochemical gradient—the membrane electric potential and the ion concentration gradient—may act in the same or opposite directions.

B. Cotransporters use the energy released by movement of an ion (usually H+ or Na+) down its electrochemical gradient to power the import or export of a small molecule or different ion against its concentration gradient.

C. Cotransporters use the energy released by movement of an ion (usually H+ or Na+) down its electrochemical gradient to power the import or export of a small molecule or different ion down its concentration gradient.

D. The cells lining the small intestine and kidney tubules contain symporters that couple the energetically favorable entry of Na+ to the import of glucose against its concentration gradient.

Which of the following is incorrect?

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#Question id: 12754

#Unit 13. Methods in Biology

A restriction enzyme cuts 1000bp away from the recognition site the restriction enzyme is most likely to be

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#Question id: 4665

#Unit 3. Fundamental Processes

Mode of activation of rifampicin in E.coli is through