This is a protein-controlled passage that permits the cell membrane to be permeable as needed
What is a gated channel?
100
Movement of molecules from an area of high concentration to a low concentration.
What is diffusion?
100
Molecules comprised of DNA and found inside the nucleus.
What are chromosomes?
100
A protein that seems to regulate cell cycle
What is cyclin?
200
Period in the cell cycle when the cell grows and the DNA is replicated.
What is interphase?
200
The process by which cells engulf substances that are too large to enter the cell through cell membrane
What is endocytosis?
200
Diffusion of water through a semipermeable membrane.
What is osmosis?
200
each chromosome consists of two identical “sister” parts
What are chromatids?
200
A disorder in which some of the body’s own cells lose the ability to control Growth
What is cancer?
300
an organelle near the nucleus that travels to opposite side of the nucleus during prophase.
What is a centriole?
300
Cell eating
What is phagocytosis?
300
The difference in concentrations of a substance across space is called a
What is a concentrated gradient?
300
The two members of each pair of chromosomes.
What homologous chromosomes?
300
A tumor that may cause death.
What is a malignant tumor?
400
During this phase the nucleolus and nuclear membrane disappears and chromosomes and spindle fibers appear.
What is prophase?
400
chemical mechanism that moves Na+ ions out of cell and forces K+ in
What is sodium potassium pump?
400
The state when the concentration of the molecules of a substance is the same throughout a space
What is equilibrium?
400
The point at which sister chromatids are attached.
What is the centromere?
400
Radiation, tobacco smoking, asbestos, viruses, some food additives
What are some causes of cancer?
500
The chromosomes line up at the equator of the nucleus.
What is metaphase?
500
Is the passage of large molecules out of a cell
What is exocytosis?
500
If the concentration of solute molecules in the environment outside the cell is lower than in the cell, the solution outside is ___________________relative to its environment
What is hypotonic
500
a cell that contains both chromosomes of a homologous pair is called ________
Found in body cells – somatic cells
What is a diploid cell.
500
The two types of regulatory proteins that control cell growth.
What are internal regulators and internal regulators?