Indicate Whether Each of the Following Mobile Elements in Drosophila

question 32

Short Answer

Indicate whether each of the following mobile elements in Drosophila is a DNA-only transposon (D), a retroviral-like retrotransposon (R), or a nonretroviral retrotransposon (N). Your answer would be a four-letter string composed of letters D, R, and N only, e.g. RRRR.
( ) P elements; these have inverted terminal repeats and move with the help of a transposase enzyme.
( ) Copia elements; these have directly repeated long terminal repeats and move with the help of a reverse transcriptase and an integrase.
( ) F elements; these are long interspersed nuclear elements (LINEs).
( ) Mariner elements; these move via a DNA intermediate.

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Definitions:

Estrogen

A group of steroid hormones that play an essential role in regulating female reproductive physiology, including the menstrual cycle and reproductive system development.

Progesterone

A hormone produced by the corpus luteum, known as a steroid, that encourages the uterus to get ready for pregnancy.

Umbilical Cord

A flexible cord-like structure containing blood vessels and attaching a mammal fetus to the placenta during gestation.

Extraembryonic Membrane

Membranes outside the embryo that contribute to the developing embryo's life support system in various ways, such as gas exchange and waste management.