First Semester Biology Final Flashcards
What are the three parts of the cell theory?
- All living things are composed of cells.
- Cells are the basic unit of structure and function in all living things.
- All cells come from pre-existing cells
How would you be able to recognize a prokaryotic cell under a microscope?
There is no nuclei or membrane-bound organelles in a prokaryotic cell.
What cells enclose their DNA in a nucleus?
Eukaryotes
What does the nucleus do?
Contains and stores DNA
What is the relationship between the nucleus and the cytoplasm?
The cytoplasm surround and suspends the nucleus.
What organelles breaks down other organelles and other cells?
Lysosomes
What plant organelle stores salt and water?
Vacuole
What structure makes proteins and where are these made?
Ribosomes make protein. They are made in the nucleus.
What organelle modifies and sorts and packages protein?
Golgi Apparatus
What organelle converts chemical energy in food to compounds that the cell can use to make energy?
Mitochondria
Which two organelles are involved in energy conversion?
Mitochondria and Chloroplasts
How is the cell wall different from the cell membrane?
The cell membrane is flexible while the cell wall is rigid.
What is the primary function of the cell membrane?
The cell membrane regulates what enters and leaves the cell.
Where are protein synthesizers made and where are most of them located?
Ribosomes are made in the nucleolus. Most of the are located in the rough endoplasmic reticulum.
What is the largest structure in a plant cell?
Vacuole
The movement of materials across the cell membrane WITHOUT using cellular energy
passive transport
the process by which molecules of a substance move from areas of high concentration of that substance to areas of low concentration
diffusion
molecules that cannot directly diffuse across the membrane pass through special protein channels (carrier molecules).
facilitated diffusion
the diffusion of water through a selectively permeable membrane from an area of high to low concentration
osmosis
the concentration of solute molecules is the same inside the cell and in the solution
isotonic solution
the solution has a higher solute concentration than solute concentration inside the cell
hypertonic solution
the solution has a lower solute concentration than solute concentration inside the cell
hypotonic solution
the movement of molecules against a concentration difference from an area of low to high concentration. REQUIRES ENERGY
active transport
a vesicle forms that large molecules, clumps of food, or complete cells can be surrounded by, and then forms a vacuole to pull the item into the cell (Bulk Transport)
Endocytosis
the forcing out of substances from the cell membrane using vacuoles and vesicles
Exocytosis
large solids are taken into the cell
Phagocytosis
large liquids are taken into the cell
Pinocytosis
group of similar cells that perform a similar function
tissue
group of tissues that work together
organ
group of organs that work together to complete the system
organ system
to respond, a cell must have ________ that the signal binds to.
receptor
what must be true for diffusion to occur?
- Equilibrium must be reached
- Permeability - molecules can pass through