As the two strands of the double helix are separated, the positive supercoiling interferes with the further unwinding of DNA. Which of the following enzyme makes a break in a strand of DNA to release the supercoiling and facilitate the replication to occur?

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#Question id: 11084

#I Life Science/ Life Sciences Group – I-V

The next diagram shows two lung units (S and T) with their blood supplies. Lung unit S has an ideal relationship between blood flow and ventilation. Lung unit T has a comprised blood flow. What is the relationship between alveolar dead space (DALV), physiologic dead space (DPHY) and anatomic dead space (DANAT) for these lung units?

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#Question id: 4577

#I Life Science/ Life Sciences Group – I-V

Which of these is a statement that Darwin would have rejected?

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#Question id: 4311

#SCPH28 | Zoology

At the beginning of this century, there was a general announcement regarding the sequencing of the human genome and the genomes of many other multicellular eukaryotes. Many people were surprised that the number of protein-coding sequences was much smaller than they had expected. Which of the following types of DNA make up the rest of the human genome?

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#Question id: 12727

#SCPH06 I Botany

Name the form of DNA which may be produced with a DNA sequence made up from alternating purine and pyrimidine nucleotides.

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#Question id: 12675

#SCPH06 I Botany

Use the incomplete diagram below, illustrating some of the steps involved in eutrophication to answer the following questions

What would be a likely entry for box A?