Untitled Flashcards Set

At this moment millions of cells are dividing, which is the process of the cell cycle.

The cell sequence is the regular sequence of growth & division that cells go through.

The two purposes of the cell cycle are groth & repair.

The 3 main stages of the cell cycle are

Stage 1: Interphase. Interphase is the stage that cells are in the longest. Interphase is the period of growth, making copies of DNA ,& preparing to divide.

Stage 2: Mitosis. Mitosis is where the cell’s nucleus divides into a nuclei. The are 4 phases of Mitosis: 1. Prophase. 2. Metaphase. 3. Anaphase. 4: Telephase.

Stage 3: Cytokenesis. Cytokenesis is the final stage where the cytoplasm divides & all organelles go into new cells. In an animal cell during cytokenesis, the cell membrane squeezes around the cytoplasm “piniching” it into new cells. In a plant cell during cytokenesis, a cell “plate” forms across the middle of the cell grudually becoming a new cell membrane.

The 4 phases of Mitosis are

1. Prophase: Prophase is the longest stage of Mitosis where the chromosones form in the nucleus.

2. Metaphase: Metaphase is when the chromosones line up in the middle of the cell.

3. Anaphase: Anaphase is when the “x” of the chromosone is pilled away to seperates sides of the cell.

4. Telephase: Telephase is when a new nucleus is formed.

DNA: DNA is Deoxyrivonucleic Acid-genetic material that carries information from one generation to the next located in the chromatin in the nucleus.

A DNA molecule looks like a twisted ladder. Nucleotide is the base steps of the DNA ladder. Each nucleotide has 2 components- sugar, phosphate, & nitrogen base. There are 4 types of nitrogen bases- adenine, thymine, guanine, & cytosine. Guanine & cytosine always pair together, & vice versa.