Proteins that interact with DNA often interact with the phosphates that are part of this molecule. Which of the following types of amino acids would you predict to be present in the DNA binding sites of these proteins?

a. acidic amino acids
b. nonpolar amino acids
c. uncharged polar amino acids
d. basic amino acids

Option D) basic amino acids

Explanation:

Since the phosphates occupying the 5' end of DNA bear negative charge due to the previous dissociation of hydrogen atoms, ONLY portions of the interacting protein bearing positive charge serve as binding sites.

These portions of proteins with positive charge is made up of basic amino acids like lysine and arginine, as they have an extra amino acid in their side chain, and are attracted to phosphate molecules with negative charges.

Thus, basic amino acids will serve as binding sites

atp is used for energy.

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle