Cell theory
What is the basic unit of life?
The cell
What is mitosis?
The process of nuclear division
What does DNA stand for?
Deoxyribonucleic acid
What is the name of the stage when a cell grows and performs its normal functions?
Interphase
Fill in the blank:
DNA replicates in a _________________________ fashion.
Semi-conservative
According to cell theory, where do all new cells come from?
Pre-existing cells
Fill in the blank: Sister chromatids are attached by the __________________ and then pulled apart during anaphase.
Centromere
Sister chromatids are attached by what structure until anaphase?
Centromere
During which stage does DNA get copied?
Interphase - S phase (synthesis)
What occurs BEFORE and AFTER mitosis?
Interphase; cytokinesis
True or False: The cell wall is present in plant cells but absent in animal cells
True
Are the daughter cells genetically identical or different?
Genetically identical
What are the four nitrogen bases found in DNA?
Adenine, Thymine, Cytosine, Guanine
What is the difference between CHROMATIN and CHROMOSOME?
Chromatin - loose and thread-like structure
Chromosome - tightly packed structure
Adenine pairs with which nitrogenous base?
Thymine
What is an example of a single celled organism and a multicellular organism?
Single cell: Bacteria
Multicellular: humans
During which phase do chromosomes line up in the middle of the cell?
Metaphase
Which DNA base pairs with Adenine?
Thymine
During which phase do chromosomes become visible and the nuclear membrane begins to break down?
Prophase
True or false: A plant cell contains a central vacuole that takes up 90% of space while animal cells have smaller vacuoles spread throughout.
True
Name one of the three main principles of cell theory.
All living things are made of cells; cells are the basic unit of life; all cells come from pre-existing cells.
During which phase do sister chromatids separate and move to opposite poles?
Anaphase
Where is DNA primarily found in a eukaryotic cell?
The nucleus
If the parent cell has 8 chromosomes, how many chromosomes will each daughter cell have after mitosis and cytokinesis is complete?
8 chromosomes
List the phases of mitosis in order
Prophase, Metaphase, Anaphase, Telophase