A membrane that allows certain substances to pass in and out but not others.
What is selectively permeable?
100
The process when substances move from a place of high concentration to a place of low concentration.
What is diffusion?
100
The process of a cell coping the DNA that makes up the chromosomes.
What is DNA replication?
100
A change in a gene that causes the gene to produce a different protein.
What is a mutation?
100
The cell process that creates two identical cells as the original cell.
What is mitosis?
200
The condition when there is an equal concentration of water molecules on each side of a membrane and there is no net movement of molecules.
What is equilibrium?
200
Process that requires transport proteins and energy to move molecules against a diffusion gradient.
What is active transport?
200
The complementary strand of DNA for A - T - C - C - G - T?
What is T - A - G - G - C - A?
200
The order of the nitrogen bases in DNA determines the order of ________ in proteins.
What is amino acids?
200
All of the following happens during interphase, EXCEPT
*copies of DNA are made
*all normal metabolic activities
*the nucleus divides
*cell growth and more organelles are made
What is the nucleus divides?
300
Required for active transport, but not needed for passive transport.
What is energy?
300
A fresh water frog is placed in ocean water. The cells of the frog will... (gain water or lose water)
What is lose water?
300
A sequence of nucleotides that controls the production of one protein.
What is a gene?
300
The cell uses information from messenger RNA to produce proteins.
What is translation?
300
A cell starts out with 68 chromosomes. After mitosis is complete there will be ___ cells that each have ____ chromosomes.
What is 2 and 68?
400
Blood cells are placed in distilled water. Osmosis will occur causing the blood cells to...
What is gain water and burst?
400
Two carrots have the same mass. Carrot A is placed in salt water and carrot B is placed in pure water. One day later, the expected change in mass of the carrots would be ...
What is carrot A would have less mass, and carrot B would have more mass?
400
Determines the actual genetic code of genes.
What is the sequence of nitrogen bases (or nucleotides) in DNA?
400
All living things have the same ________ to code for the same ________.
What is codons and amino acids?
400
When cells grow and divide without control.
What is cancer?
500
As a cell continues to grow, the surface area to volume ratio _________, making diffusion _________ efficient at moving substances in and out of the cells.
What is decreases and less?
500
A cell membrane consisting of two layers of phospholipids with proteins imbedded.
What is a phospholipid bylayer?
500
DNA is extracted from 1,000 human sperm cells and 1,000 human skin cells. More DNA would be extracted from _____ cells, because the cells are _________ (haploid or diploid).
What is skin and diploid cells?
500
In all living things, there are ____ amino acids that can combine to form ______ of different proteins.
What is 20 and thousands?
500
This happens before cell division, so that each new cell has a complete set of chromosomes when the cell divides.