BIOL 1001 Crousillac Exam 2 LSU Practice Questions with Correct Answers
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Course
BIOL 1001
Institution
BIOL 1001
Eukaryotic Cell -Nucleus -Internal membranes (Organelles)
Prokaryote Nucleiod region
What is the nucleiod? Dense region in a prokaryotic cell where DNA is found
Where is the nucleiod found? Prokaryotic cell
What is the function of the nucleus? Contains DNA in eukaryotic cell
What is the functi...
BIOL 1001 Crousillac Exam 2 LSU Practice Questions with Correct Answers Eukaryotic Cell ✅-Nucleus -Internal membranes (Organelles) Prokaryote ✅Nucleiod region What is the nucleiod? ✅Dense region in a prokaryotic cell where DNA is found Where is the nucleiod found? ✅Prokaryotic cell What is the function of the nucleus? ✅Contains DNA in eukaryotic cell What is the function of the smooth endoplasmic reticulum? ✅Makes lipids, smooth surface What is the function of the rough endoplasmic reticulum? ✅Makes proteins, contains ribosomes on the surface What is the function of the golgi complex? ✅Fedex of the cell, shipping and receiving center of the cell What is the function of the lysosome? ✅Destroys old organelles, large molecules into smaller molecules (monomers) to be used to make other large molecules. Also used for digesting the food for the cell What is the function of the ribosomes? ✅Protein synthesis machines. Found stuck to the rough ER membrane or free floating in the cytoplasm. The two types are interchangeable What is the function of the vesicles? ✅Made of phospholipids, just like plasma membrane. Used to ship things around the cell and across the plasma membrane. Like a little pouch made of phospholipids. What is the function of the chloroplast? ✅Site of photosynthesis in plants and some bacteria. Contains 2 outer membranes and a series of internal membranes called thylakoids. What is the function of the mitochondria? ✅Site of cellular respiration. Powerhouse of the cell. The food you eat gets broken down in the presence of oxygen, and the energy released is used to make ATP. What is the function of the nucleolus? ✅Found in the center of the nucleus. Site of ribosome assembly. So, cells that make a lot of proteins, sometimes have an enlarged nucleolus so that they can make ribosomes more quickly. What is the structure of the nuclear membrane/envelope? ✅Plasma membrane is a phospholipid bi -layer (only 2 layers). Nuclear membrane is a double bi -layer (contains 4 layers oh phospholipids). What are chromosomes made of? ✅Chromatin, which is a mixture of DNA and proteins Which organelles are part of the endomembrane system? ✅Endoplasmic reticulum, gogli apparatus, vesicles, lysosome What is the pathway of a secretory protein? ✅-Digestive enzymes made in the ribosome and travel into the rough ER -Enzymes are packaged in vesicles and shipped to the golgi apparatus -Golgi modifies the enzymes as they pass through its compartments -Enzymes are packaged into lysosomes which bud from the golgi apparatus -Lysosome fuses with the food vacuole and the enzymes digest the food How are the mitochondria and chloroplasts similar to prokaryotic cells? ✅They have their own DNA, make some of their own proteins, can move around, can grow, can reproduce What are the 4 functions of the cell membrane? ✅Isolate the cell environment, communicate, exchange, and identify What 2 lines of evidence suggest that the cell membrane is a phospholipid bilayer with proteins associated with it? ✅-Phospholipid content of a red blood cells has just enough to cover the cell with 2 layers. Since these cells do not have any internal membranes, then all of the phospholipids have to make up the plasma membrane. -Membranes collected from red blood cells contain proteins in addition to lipids Why is the cell membrane described as a fluid -mosaic? ✅Fluid: Because it behaves a lot like a liquid. These phospholipids move around a good bit, similar to the way molecules move within a liquid. Mosaic: There are numerous different proteins, and glycoproteins associated with the membrane. It is composed of several different ingredients.
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