hooo

Separates the two strands of DNA so that replication can start

DNA helicases

Adds the DNA nucleotides

DNA polymerase

What would happen if a cell divides before DNA replication is completed?

Daughter cells would receive incomplete genetic information and never regain it, and they may not survive.

The area in the red box represents one...

Phosphate group

Griffith investigated how certain types of bacteria produce pneumonia in mice. The diagram outlines his experiments.

The heat-killed S type bacteria transformed the harmless R type bacteria into disease-causing cells.

What part of a DNA molecule makes up the "steps or rungs" of the ladder?

What part of a DNA molecule makes up the "steps or rungs" of the ladder?

Stem cells are able to specialize into the unique cell types seen throughout the body, a process called

differentiation

DNA replication results in two DNA molecules

each with one new strand and one original strand.

"Seals" or "glues" the DNA together

ligase

can develop into most, but not all, of the body's cell types. Adult stem cells, such as the cells found in bone marrow, are considered ______ stem cells because they can differentiate into a limited set of different cell types.

multipotent

Regions of DNA called _______ can be turned on and off through a process called ______ mitosis .

nucleotides and mitosis

After the first couple of cell divisions these cells begin to differentiate these new cells, such as the embryonic stem cells, are ________

pluripotent

A fertilized egg cell is considered a _____ stem cell because it can differentiate into any other cell type.

totipotent