Tonicity Applied






Eukaryotic Organelles Membrane Transport It's all about the Cell Cycle, Nucleus and DNA... Fingerprinting and Electrophoresis Random
What is the mitochondrion (mitochondria)?
This organelle is responsible for converting sugar into ATP, which provides the cell with usable energy. It is the "power house" of the cell.

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What is active transport?

EC: What type of transport doesn't require energy?
This form of transport requires the use of ATP (energy), because it is moving molecules against the concentration gradient (up the hill).
What is the nucleus?
This is like the brain of the cell in that it controls the activities of the cell, like mitosis.
What is negative?
DNA has this type of charge.
What is S-phase?

EC: Why does the cell need to duplicate its DNA?
During this phase of the cell cycle DNA is duplicated.
What is the Golgi apparatus (body/complex)?
This organelle packages proteins from the ER, usually making them more complex. It is like the UPS of the cell because it can send materials out of the cell.
What is diffusion?

EC: What is the diffusion of water?
Molecules capable of this type of passive transport do not require carrier proteins to help them pass through the membrane.
What are proteins?

EC: What molecule acts as a middle man, carrying the message between DNA and protein?
Genes are segments of DNA that code for this kind of molecule.
What is turn the volume adjusting dial above or below its intended range?
You should never hold a micropipette sideways when the tip is on, let the plunger snap back, or do this.
What is "not move", or remain stationary?
If a molecule is completely neutral, we would expect it do this during gel electrophoresis.
What is the lysosome?
This organelle is just a membrane surrounding digestive enzymes. Its function is to break down cell parts for removal.

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What is hypertonic?

EC: What is the term for what this plant cell is experiencing?
For this to happen, the tonicity of the solution OUTSIDE the cell has to be this.

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What is the M phase?

EC: What is checked during this phase's checkpoint?
This phase of the cell cycle is where the cell divides into to two daughter cells.
What are restriction enzymes?

EC: Why do we use them in the first place, and not just take whole DNA and compare it?
These molecules are used to cut DNA at specific sequences, no matter where they occur.
What are centrioles?

EC: Which Eukarytic organelle is where lipids are synthesized?
These Eukaryotic organelles are found in animals and some plants, and their primary job is to move chromosomes around during mitosis.
What is the rough ER?
This organelle is a concentrated site for protein production and transport within the cell. It is closely associated with the nucleus, and is covered with ribosomes.
What is pinocytosis?
When cells need to take in large quantities of liquid in a short amount of time, they will use this rather than rely on passive transport. Essentially, they will break part of their membrane off into a vesicle to "swallow" the liquid.
What is grow?
During the G1 and G2 phases of the cell cycle the cell does its normal activities (make proteins, etc.) and this, which is essential for the cell to divide.
What is small?

EC: Why?
This size of molecule should travel the furthest in a gel electrophoresis.
What is G1, G2, and M?
Because of these 3 phases, the Cell Cycle is said to control the growth of both the cell and the organism.
What is the nucleolus?
This organelle is where the sub-units for ribosomes are made. It is essentially a bunch of ribosomal RNA (rRNA) organized into a ball in the nucleus.
What is [dynamic] equilibrium?

EC: Why is it called "dynamic"?
When two differently concentrated solutions are separated by a semi-permeable membrane, there will be a net gain or loss of molecules for the two sides until what is reached?
What is damage to DNA and proper cell size?
While DNA is duplicated in the S phase of the cell cycle, the cell doesn't check if it did this correctly until the G2 phase. The cell also checks for these two things during the G2 checkpoint.
Who are Bob, Sue, and Lisa?

EC: What can we say about John's guilt in committing the crime?
Based on the results of the gel electrophoresis, these suspect(s) should no longer be considered as committing the crime.

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What is 1) hypertonic, 2) isotonic, and 3) hypotonic?

EC: Why does the middle one have an arrow going each way?
In the diagram, this is the tonicity for each of the solutions OUTSIDE the red blood cells (from left to right).

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What is they will dehydrate you because they are heavily hypertonic?
It's because of this that drinking saltwater, as well as sugary drinks is bad for your body.

A&P Unit 1 Review - Cell to Organism

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