Microscopes
What microscopes can see in fine detail, use electrons, and use a computer and vacuum to see their image?
SEM and TEM
What are the 3 parts of the cell theory?
Cells are the basic unit of life
All cells come from pre-existing cells
All living things are made of one or more cells
Which type of cell has a nucleus: prokaryotic or eukaryotic?
Eukaryotic cells have a nucleus; prokaryotic cells do not.
Which type of cell, plant or animal, contains chloroplasts, and what is its function?
Plant cells contain chloroplasts, which are responsible for photosynthesis (converting sunlight into energy).
Which macromolecule makes up the majority of the cell membrane and is responsible for its structure?
Lipids, specifically phospholipids, make up the majority of the cell membrane and form the lipid bilayer structure.
What microscopes can see living organisms?
Light and dissecting microscopes
What is a theory?
A theory is an explanation of something in nature that scientists develop after many years of studying evidence and making observations. It can change or improve as new technology helps us learn more.
Which type of cells have membrane-bound organelles, like mitochondria or chloroplasts?
Eukaryotic cells
What structure is found in plant cells but not animal cells, and provides support and protection?
Plant cells have a cell wall, which provides structure, support, and protection.
What is the key difference between passive transport and active transport?
Passive transport does not require energy, as substances move from high to low concentration, while active transport requires energy (ATP) to move substances from low to high concentration.
What two microscopes can see internal structures?
Light microscopes and TEM
What part of the cell theory describes why we can see plant, animal, and even tiny bacteria cells under a microscope?
All living things are made of cells
Which type of cell is usually unicellular?
Prokaryotic cells
Which type of cell, plant or animal, has large central vacuoles, and what is their function?.
Plant cells have a large central vacuole that stores water, nutrients, and waste, and helps maintain cell structure
What role do proteins play in the cell membrane?
Proteins in the cell membrane help with transporting molecules in and out of the cell, acting as channels or pumps, and some also serve as receptors for signaling.
What two microscopes can see external structures?
Dissecting and SEM?
What part of the cell theory explains why your body is made of many different kinds of tiny cells that work together to keep you alive?
Cells are the basic unit of life.
In which type of cell is the genetic material found floating freely in the cytoplasm?
In prokaryotic cells, the genetic material floats freely in the cytoplasm (they lack a nucleus).
What is osmosis, and which type of transport is it an example of?
Osmosis is the movement of water across a semi-permeable membrane from an area of low solute concentration to high solute concentration, and it is an example of passive transport.
This microscope can see images in 3D, see external structures, and has a very high magnification. Who am I?
SEM
What part of the cell theory explains cell division and reproduction?
Cells come from pre-existing cells.
Which type of cell has ribosomes, DNA, cytoplasm, and cell membranes?
Both prokaryotic and eukaryotic cells have a cell membrane that controls what enters and leaves the cell, and ribosomes that make proteins. Even though eukaryotic cells are more complex, these structures are essential for all cells to survive.
Question: Do both plant and animal cells have mitochondria, and what is their function?
Yes, both plant and animal cells have mitochondria, which produce energy (ATP) for the cell through cellular respiration.
What is a semipermeable membrane?
A semi-permeable membrane is a thin barrier that lets some things, like water, pass through but stops other things, like bigger particles, from getting through. It helps control what goes in and out of the cell.