Cell Overview
The Endomembrane System
Organelles
The Cytoskeleton and Cell Junctions
Labs 6 and 7
100
What are 3 structures that every cell will have?
Cell membrane, cytoplasm, DNA
100
What are the two types of vesicles in the endomembrane system and what do they do?
Transport vesicle (transport between organelles) and secretory vesicles (transport to the cell membrane for export)
100
What is the main function of the cell membrane? What is it made of?
It controls exchanges between the cell and the environment. It’s made of phospholipids.
100
Name the cytoskeletal elements from smallest to largest:
Microfilaments Intermediate filaments Microtubules
100
When using a microscope, will the field of view increase or decrease with increased magnification?
Decrease
200
What are cells that store DNA within a nucleus called?
Eukaryotic
200
Name 3 organelles that function in the endomembrane system?
The Golgi Body, the endoplasmic reticulum, vesicles
200
What organelle is primarily involved with inactivating toxins?
The peroxisome
200
Which is the smallest cytoskeleton element that is involved in changing the cell’s shape? Which provide tracks for organelles to follow as they move about inside the cell?
Microfilaments Microtubules
200
What would the total magnification be when using an eyepiece with the power of 10x magnification and an objective with 40x magnification?
400x
300
What limits the size of a cell?
The cell's surface to volume ratio
300
What is the role of the Golgi Body in the endomembrane system?
Finishes, sorts, and ships lipids and proteins.
300
What is the function of lysosomes?
Intracellular digestion
300
What are the 3 kinds of cell junctions?
Tight Adhering Gap
300
The iodine test detects the presence of what molecule?
Starch
400
What type of microscope would you use to see an image of internal cell structures? To study living cells? To study the surface of cells?
Transmission electron microscope (TEM). Light microscope. Scanning electron microscope (SEM).
400
What is the main function of the rough endoplasmic reticulum? The smooth endoplasmic reticulum?
Rough: Modifies proteins made by the ribosomes attached to it. Smooth: Makes lipids.
400
What is the function of ribosomes? Where are their subunits produced?
They are sites of protein synthesis. Their subunits are produced in the nucleolus.
400
Which cell junction bind cells together to form a leak-proof barrier?
Tight junctions
400
An orange result on a Benedict’s test would mean what?
There are reducing sugars/monosaccharides present
500
What are 2 structures that prokaryotic cells may have that eukaryotic cells don’t have?
1. Nucleoid (where DNA is located) 2. Capsule 3. Pili
500
Place the following components of the endomembrane system in their correct order. Plasma membrane Endoplasmic reticulum Golgi Body Secretory vesicle Transport vesicle
Endoplasmic reticulum Transport vesicle Golgi Body Secretory vesicle Plasma membrane
500
What organelle makes ATP by breaking down glucose?
The mitochondria
500
Which cell junctions contain channels allowing materials to flow freely between cells?
Gap junctions
500
Which test would you use to test for the presence of proteins in a substance?
The Biuret test
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