The 3' -OH of the sugar group forms a bond with one of the negatively charged oxygens of the phosphate group attached to the 5' carbon of another sugar. When many of these nucleotide subunits combine, the result is the large single-stranded polynucleotide or nucleic acid, DNA ().
The length of the exam depends on the type of study being performed. 1  MRI of the Brain â¦ 20-45 minute scan time. 2  MRI of the Orbits â¦ 20-35 minute scan time.3  MRI of the TMJ â¦ 45-60 minute scan time.4  MRI of the Soft Tissue Neck â¦ 25-35 minute scan time.5  MRI of the Cervical Spine â¦ 20-35 minute scan time. MRI of the Brain â¦ 20-45 minute scan time. 2  MRI of the Orbits â¦ 20-35 minute scan time. 3  MRI of the TMJ â¦ 45-60 minute scan time. 4  MRI of the Soft Tissue Neck â¦ 25-35 minute scan time.
How an MRI scan is performed. A magnetic resonance imaging (MRI) scan is a painless procedure that lasts 15 to 90 minutes, depending on the size of the area being scanned and the number of images being taken.epending on the size of the area being scanned and how many images are taken, the whole procedure will take 15 to 90 minutes. The MRI scanner will make loud tapping noises at certain times during the procedure.