in what phase of the cell cycle do the organelles double in one cell course hero

Full Answer

How many organelles are present in the cell at end of phase?

Key process: the cell grows Time interval (hours): 11 Sets of DNA present in each cell at end of phase: 1 Number of organelles in each cell at end of phase: 560 Synthesis Key process: DNA replication

What organelles are replicated during the cell cycle?

A. The only organelles which replicate during the cell's cycle are the nucleus, mitochondria and chloroplasts (plants). During S-phase, the nucleus is replicated and completed by the start of G2.

What are the two major phases of the cell cycle?

The cell cycle has two major phases: interphase and the mitotic phase (Figure 1). During interphase, the cell grows and DNA is replicated. During the mitotic phase, the replicated DNA and cytoplasmic contents are separated, and the cell divides. Figure 1. The cell cycle consists of interphase and the mitotic phase.

When are cell organelles formed during interphase?

Cell organelles are formed throughout interphase, mostly in G1 phase, which is primary growth and development.

In what phase of the cell cycle do the organelles double in one cell?

Mitotic Phase Its organelles are also duplicated. This happens in the interphase. Then, when the cell divides (mitotic phase), it occurs in two major steps, called mitosis and cytokinesis, both of which are described in greater detail in the concept Mitotic Phase: Mitosis and Cytokinesis.

During which stage of the cell cycle does the cell double its organelles and accumulate the materials needed for DNA synthesis?

interphaseDuring interphase, the cell grows, accumulating nutrients needed for mitosis, and replicates its DNA and some of its organelles.

What is the phase of the cell cycle when the cell is trying to be two cells the chromosomes have moved to the opposite sides of the cell and it is developing two nuclei?

Metaphase leads to anaphase, during which each chromosome's sister chromatids separate and move to opposite poles of the cell.

Do organelles duplicate in G1?

G1 and G2 are both growth phases, during which cellular organelles are replicated and the cell grows in size.

What occurs in G1 S and G2 phases?

Initially in G1 phase, the cell grows physically and increases the volume of both protein and organelles. In S phase, the cell copies its DNA to produce two sister chromatids and replicates its nucleosomes. Finally, G2 phase involves further cell growth and organisation of cellular contents.

What happens in G2 phase?

During the G2 phase, extra protein is often synthesized, and the organelles multiply until there are enough for two cells. Other cell materials such as lipids for the membrane may also be produced. With all this activity, the cell often grows substantially during G2.

What happens in the S phase?

S phase. In S phase, the cell synthesizes a complete copy of the DNA in its nucleus. It also duplicates a microtubule-organizing structure called the centrosome. The centrosomes help separate DNA during M phase.

What happens during the S phase of the cell cycle?

S phase is the period of wholesale DNA synthesis during which the cell replicates its genetic content; a normal diploid somatic cell with a 2N complement of DNA at the beginning of S phase acquires a 4N complement of DNA at its end.

What is the life cycle of a cell?

Other organisms, from humans to plants to bacteria, also have a life cycle: a series of developmental steps that an individual goes through from the time it is born until the time it reproduces. The cell cycle can be thought of as the life cycle of a cell.

How long does it take for a cell to divide?

A typical human cell might take about 24 hours to divide, but fast-cycling mammalian cells, like the ones that line the intestine, can complete a cycle every 9-10 hours when they're grown in culture. Different types of cells also split their time between cell cycle phases in different ways.

What is the M phase?

M phase involves two distinct division-related processes: mitosis and cytokinesis. In mitosis, the nuclear DNA of the cell condenses into visible chromosomes and is pulled apart by the mitotic spindle, a specialized structure made out of microtubules.

How many stages of mitosis are there?

Mitosis takes place in four stages: prophase (sometimes divided into early prophase and prometaphase), metaphase, anaphase, and telophase. You can learn more about these stages in the video on mitosis. In cytokinesis, the cytoplasm of the cell is split in two, making two new cells.

How many steps does mitosis go through?

The cell goes through 4 steps (prophase, metaphase, anaphase, and telophase.) The cells at the end of the process also have the same amount of chromosomes as the parent cell. At the end, 2 cells are produced. Mitosis is used to make body cells, and occurs in the body.

Where does cytokinesis take place?

Importantly, cytokinesis takes place differently in animal and plant cells. Cytokinesis in animal and plant cells. In an animal cell, a contractile ring of cytoskeletal fibers forms at the middle of the cell and contracts inward, producing an indentation called the cleavage furrow. Eventually, the contractile ring pinches the mother cell in two, ...

How do plant cells divide?

Because of this, plant cells divide in two by building a new structure down the middle of the cell. This structure, known as the cell plate, is made up of plasma membrane and cell wall components delivered in vesicles, and it partitions the cell in two.