Structure of Chromosomes
These are long molecules made of double-stranded DNA that contains the genetic information of the cell.
what is Chromosomes
Prokaryotes divide by this process.
What is binary fission.
What happens in G1
Cells grow and prepare for DNA replication.
In this Phase of Mitosis: centrioles produce microtubules (spindle fibers), and these fibers stretch across the cell. These fibers attach to kinetochore of the chromatids. Fibers pull the chromosomes and they line up at the center of the cell.
What is Metaphase.
What is prevent uncontrolled growth.
These are attached to the DNA. Hint: the monomer is amino acids.
What is protein.
Eukaryotes divide by this process.
What is mitosis.
What happens in G2?
Cells continue to grow and prepare for the separation of chromosomes.
During this phase: centriole divide and move to the opposite sides of the cell. Chromosomes condense, and are now called chromatids. Nuclear membrane dissolves. Proteins build up on the centromere, forming kinetochore.
What is Prophase.
When cells divide rapidly and uncontrollably this forms.
What is cancer.
Chromosomes wind up and around other proteins. This allows them to fit inside the nucleus. When chromosomes are in this state, they are called what?
What is a chromatid.
The Cell Cycle had 4 phases, name those phases.
What is G1, S, G2, M
What happens in G-Zero?
Cells perform normal cell functions, but will not prepare for division.
During this phase: chromatids of each chromosome are being pulled apart and going to the opposite ends (poles).
What is Anaphase.
Exposure to certain mutagens, toxins and UV Ray can cause what?
What is cancer.
In Eukaryotes, human cells contain 46 individual chromosomes or ____ pairs of chromosomes.
What is 23.
What happens in S phase.
DNA replication occurs.
The first 3 phases are known as what?
What is Interphase.
During this phase: daughter chromosomes arrive at the poles of the cell. At each new end, nuclear membranes form around daughter chromosomes. Chromosomes decondense, no longer visible as individual chromosomes. Spindle fibers disperse and cells start to divide.
What is Telophase.
True or false: do cancer cells need specific nutrient signals and temperature to controls in order to divide?
What is false.
Prokaryotes have smaller circular DNA molecules called plasmids. Plasmids are not ____.
What is chromatids.
What happens in M phase.
Cell division occurs
The last phase of the cell cycle is know as what?
This is not part of Mitosis. When animal cells go through this phase, you can see an indentation on the cells. This happens before it officially breaks away and forms 2 identical new daughter cells.
What is Cytokinesis.
Telomerase, is an enzyme that protect Eukaryotic chromosomes from
What is losing information during cell division.