Molecular Biology-מעבדה רפואית
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Is there a naturally occurring DNA polymerase that does not require a template?
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This question is just nasty - but it does make you think.
The enzyme TdT (Terminal deoxynucleotidyl Transferase) catalyses the addition of nucleotides onto 3' DNA ends without any template. It is therefore considered a DNA polymerase. It is found largely in B- and T-cells. Remember it as you learn about lymphocytes in Immunology.
Then there is the whole issue of Translesional DNA polymerases. It's a bit of a stretch to consider the contiguous strand sitting under the active site a 'template' if there is no base there.
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In a double-stranded polynucleotide, which of the following can base-pair with U?
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In a piece of double-stranded DNA, a is the number of As, c is the number of Cs, g is the number of Gs and t is the number of Ts. Which of the following must be true?
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Which circled element makes the dinucleotide CC shown acidic? איזה מבין האזורים המוקפים באיור, גורם לדי-נוקלאוטיד CC להיות חומצי?
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Under physiological conditions, DNA in a cell is: בתנאים פיזיולוגים, DNA בתא יהיה לרוב:
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Which of these is a legal double-stranded oligonucleotide?
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Double-stranded oligonucleotides A,B,C,D,and E are sitting in a hot tub discussing 5'-UUUUUUUUUUUUUUU-3', who isn't there. The thermostat breaks and the water starts heating without control. Who is the last to dissociate?
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