Chapter 3 Homework Mastering A&P

Interphase Correct DNA replicates during interphase. This process provides each new daughter cell with a full complement of genetic material.

Chromatids Correct Each new daughter cell receives one of the sister chromatids. After the chromatids separate, each is considered a new chromosome. At the end of cell division, each new cell contains 23 pairs of chromosomes.

Metaphase Correct Spindle microtubules from both poles of the cell attach to the sister chromatids and pull them in both directions. During metaphase, the sister chromatids are forced to the center of the cell.

Anaphase Correct During anaphase, the centromeres split and the spindle microtubules pull the sister chromatids to opposite poles of the cell. The single chromatids are now considered chromosomes.

Telophase Correct Telophase begins when the chromosomes stop moving. Nuclear envelopes form, and nucleoli reappear. Ultimately, the cell divides in two by a process known as cytokinesis.

Prophase Correct Prophase is the first phase of mitosis. During this phase, the sister chromatids condense, the nuclear envelope and nucleoli disappear, and the spindle apparatus forms.

Cytokinesis Correct During cytokinesis, a ring of actin and myosin filaments contract to form a cleavage furrow and the cell divides in two.

DNA polymerase

The leading strand is built continuously, and the lagging strand is built in pieces.

T During DNA replication, A only binds with T and T only binds with A.

DNA ligase DNA ligase joins the Okazaki fragments in the lagging strand, turning it into a continuous strand.

DNA ligase adds nucleotides to the lagging strand.

G1, S, G2

prophase, metaphase, anaphase, telophase

synthesis, s phase of interphase

prophase

molecules move through transport proteins that have been activated by ATP

facilitated diffusion

facilitated diffusion

primary active transport

exocytosis The term exocytosis literally means "out of the cell."