Science FlashCaRds (cell cycle)

Why do cells need to reproduce?

because of injury, normal growth, weight gain, or fertilized egg

How much of the cell cycle is spent in interphase?

70-90%

How do bacteria reproduce?

binary fission

How much time does a single cell cycle take?

usually 24 hours

What stimulates a cell to reproduce?

injury, weight gain, normal growth, fertilized egg

Centrioles move to the poles?

prophase

nuclear envelope reform around the cell?

telophase

Centromeres separate and chromosomes begin to move towards the poles?

anaphase

Chromosomes replicate during this specific time?

synthesis

About 70% of the cell cycle is spent in this general phase?

interphase

Division of the cytoplasm is called what?

cytokinesis

Nucleolus dissolves..?

prophase

Paired chromatids meet at the equator of the cell?

metaphase

Term referring to the division of the nucleus?

mitosis

Specific time when a cell is preparing to undergo mitosis?

G2 (gap 2)

Young cell that is growing and making more organelles is in this phase (be specific)?

G1 (gap 1)

Cell elongates and cleavage furrow deepens?

telophase

Why did scientist believe that nothing happened in interphase?

because the uncoiled DNA could not be seen, and it was invisible when the DNA was replicating

The M phase is known as

mitosis

Each pair of chromatids are attached to at an area called

centromere

The three phases of___are known as G1, S, and G2

interphase

What is the fanlike microtubule structures that help separate chromosomes known as

Spindle fibers

The division of the cytoplasm in the M phase is called

cytokinesis

What protein regulates the timing of the cell cycle in eukaryotes

cyclin

What is the rod-like structure that forms when a single DNA molecule and its associated proteins coil tightly before cell division is called

gene

The number of chromosomes found in the human body is

46

The repeating sequence of growth and cell division through many which many eukaryotic cells pass

the cell cycle

The start of mitosis is characterized by

nuclear envelope breaking down

When do autosomes (body chromosomes) have diploid cells (twice the normal amount) of chromosomes

at the beginning of mitosis

“Scenes of a play” is most likely referring to

the stages of mitosis

“Pair of shoes” is most likely to be

Homologous chromosomes

Specific time in the cell cycle when it prepares to undergo mitosis

G2

Specific time in the cell cycle when the cell replicates DNA

synthesis

Specific time in the cell cycle when the new daughter cell makes more organelles and increases in size

G1