Cell Life Cycle: Interphase

Questions and Answers

What is the result of genetic material replicating in the S-phase?

Two copies of the genetic material (correct)

Three copies of the genetic material

Four copies of the genetic material

One copy of the genetic material

What is the term for the phase of the life cycle where the genetic information is duplicating?

G1 phase

M-phase

S-phase (correct)

G2 phase

What is the result of the centrosome duplicating?

Two duplicated centrosomes (correct)

Three duplicated centrosomes

One duplicated centrosome

Four duplicated centrosomes

What happens to the DNA during the S-phase?

It is replicated Signup and view all the answers

What is the term for the phase of the life cycle where the cell grows and prepares for mitosis?

G2 phase Signup and view all the answers

What is the primary function of mitosis in the life cycle of a cell?

To enable the cell to replicate and divide into two nuclei Signup and view all the answers

During which stage of the cell cycle does the cell spend most of its life?

Interphase Signup and view all the answers

What is the result of the cell growing during the G2 phase?

The cell grows even more Signup and view all the answers

What is the relationship between the sister chromatids?

They are connected at the centromere Signup and view all the answers

What is the structure that defines the nucleus of a cell?

Nuclear membrane Signup and view all the answers

What is the state of chromosomes during interphase?

Completely unwound Signup and view all the answers

What is the result of the process of the genetic material duplicating and the cell growing?

The cell is ready for mitosis Signup and view all the answers

What is the term for the process by which the nucleus divides into two nuclei?

Mitosis Signup and view all the answers

What is the primary function of the cell membrane?

To regulate the flow of molecules in and out of the cell Signup and view all the answers

What is the state of the cell during interphase?

Growing and producing proteins Signup and view all the answers

What is the purpose of the cytosol in a cell?

To facilitate the movement of molecules within the cell Signup and view all the answers

What is the form of the chromosomes in the cell?

Unwound and tangled together with proteins and DNA Signup and view all the answers

Why is the centrosome drawn in the cell?

Because it is going to be important for mitosis Signup and view all the answers

How many chromosomes does the cell have in this example?

2 Signup and view all the answers

What is the phase of the cell cycle where the cell grows and takes in nutrients?

G1 phase Signup and view all the answers

What happens to the DNA in the nucleus during the replication process?

It increases by a factor of 2 Signup and view all the answers

What are the two copies of the DNA called after replication?

Chromatids Signup and view all the answers

What is the term for the place where the two sister chromatids are connected?

Centromere Signup and view all the answers

What happens to the sister chromatids during mitosis?

They are split apart Signup and view all the answers

What is the term for each individual DNA molecule after the sister chromatids are split apart?

Chromosome Signup and view all the answers

Why is the cell drawn with only two chromosomes?

For the sake of simplicity Signup and view all the answers

Study Notes

Interphase: The Life Cycle of a Cell

Interphase is the longest stage of a cell's life cycle, where a cell grows, lives, and performs its functions.
At some point, the cell will be ready to divide and undergo mitosis, which is the process by which the nucleus turns into two nuclei.

Cell Structure

A cell consists of a cell membrane, cytosol, and a nucleus.
The nucleus has a nuclear membrane and contains DNA.
During interphase, the chromosomes are not tightly bound and are in their chromatin form, making it difficult to see with a simple microscope.

Centrosome

A centrosome is an important organelle that will be crucial for mitosis.
It is not to be confused with the centromere, which is the point where sister chromatids are connected.

G1 Phase

The G1 phase is the first growth phase of interphase, where the cell grows and takes in nutrients from its environment.
The length of the G1 phase varies depending on the cell type.

DNA Replication

Before mitosis, the cell needs to replicate its DNA.
During DNA replication, the genetic material is duplicated, but the number of chromosomes remains the same.
The replicated chromosomes are called sister chromatids, connected at a centromere.

S-Phase (Synthesis Phase)

The S-phase is the stage of interphase where DNA replication occurs.
The genetic material is duplicated, but the number of chromosomes remains the same.

G2 Phase

The G2 phase is the second growth phase of interphase, where the cell grows and prepares for mitosis.
The cell has grown and the DNA has replicated, and the cell is now ready to enter mitosis.

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Description

Learn about the interphase stage of a cell's life cycle, where a cell spends most of its life. Understand the timeline of a cell's growth and its preparation for division.