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: 220

#Section 2: General Biology

Which structure is not a part of folate?

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#Question id: 221

#Section 2: General Biology

Which statement is false about 5,6,7,8-tetrahydrobiopterin?

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#Question id: 223

#Section 2: General Biology

Which coenzyme links to a lysine residue in a proteinʹs active site?

A) biotin

B) lipoic acid (lipoamide)

C) pyridoxal phosphate

D) biotin and pyridoxal phosphate only

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#Question id: 224

#Section 2: General Biology

Which type of atom is involved in the reactive center of lipoamide?

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#Question id: 225

#Section 2: General Biology

What kind of reaction is most important for the reactive center of lipoamide?

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#Question id: 226

#Section 2: General Biology

Which in not a lipid-soluble vitamin?