Discuss, Learn and be Happy דיון בשאלות

help brightness_4 brightness_7 format_textdirection_r_to_l format_textdirection_l_to_r

During DNA polymerase activity, the entry of deoxyribonucleoside triphosphates to the enzyme active site

1
sentiment_very_satisfied
by
מיין לפי

Some bases in DNA are occasionally methylated, typically C in eukaryotes and A in prokaryotes. This provides an additional ‘code’ to the information stored in DNA. How is this code maintained during DNA replication?

1
mood
by
מיין לפי

Which of the following activities is/are never associated with a DNA polymerase?

1
done
done
done
by
מיין לפי

Is there a naturally occurring DNA polymerase that does not require a template? YES OR NO

1
done
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. The correct answer is: Yes.
by
מיין לפי

Given the reactants shown, which of the images underneath is the most likely reaction product?

1
done
by
מיין לפי

(USMLoid) During genome replication, hydrogen-bonding between the two DNA strands is broken and the strands separated from each other. Which of the following is responsible?

1
done
by
מיין לפי

The picture shown is an electron micrograph of a naturally occurring DNA structure. It is most likely:

1
mood
by
מיין לפי

In the diagram of a replication fork shown, the circled strand

1
done
by
מיין לפי

(USMLoid) In human chromosomes, which of the following elements or properties works to ensure that information is not lost from the chromosome ends during cell proliferation?

1
done
by
מיין לפי

During DNA replication the first nucleotides added are

1
mood
by
מיין לפי