The two strands of a dna double helix are held together by:
a. ionic bonds.
b. hydrogen bonds.
c. nonpolar covalent bonds.
d. polar covalent bonds.
e. hydrophobic exclusions.

What is one energy transformation that is taking place in the photo? radiant energy to thermal energy thermal energy to nuclear energy chemical energy to thermal energy radiant energy to chemical energy

Abody cell has been growing and at synthesis proteins.in the nucleus of this body cell,dna replication is taking place. and a copy of the cells genetic material is copied.which of the following is the best conclusion you can make about the life cycle of this cell ? a) the cell is ready to undergo mitosis.and a chemical signal will send the cell to prophase b)the cell is undergoing meiosis and will cross over the genetic material next c)the cell is in the s phase of interphase and will move next to the g2 phase d) the cell is in the g2 phase of the interphase and is ready to begin diving

Genetic orders can result when sister chromatids fail to separate properly during which phase is this problem most likely to occur