Which of these transposable elements do not carry genes for functions other than those needed for transposition?

A. Retrotransposons
B. Conjugal transposons
C. Composite transposons
D. Insertion sequences


Answer: D

Biology & Microbiology

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The genetic material (DNA) of eukaryotes is organized into

(a) centrioles. (b) spindles. (c) chromosomes. (d) microtubules.

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Which vessel type regulates the amount of blood a particular area receives?

a. arteries b. arterioles c. capillaries d. venules e. veins

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All of the following characteristics are necessary for a structure to be classified as a primitive cell except 

A. a boundary separating the cell from its watery surroundings. B. DNA. C. an ability to obtain energy from its surroundings. D. macromolecules.

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Glycoproteins in the plasma membrane that identify self and help the body defend itself against pathogens.

What will be an ideal response?

Biology & Microbiology