Biology 121 Exam 2 Study Guide Exam Questions And All Correct Answers.
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Course
BIO 121
Institution
BIO 121
Exergonic Reaction - Answer Ends with the release of free energy. Takes organic compounds and breaks it up into smaller molecules
Endergonic Reaction - Answer Requires the input of free energy. Builds organic compounds from smaller molecules.
Exergonic reaction - Answer Breaking down...
Biology 121 Exam 2 Study Guide Exam
Questions And All Correct Answers.
Exergonic Reaction - Answer Ends with the release of free energy. Takes organic compounds and breaks
it up into smaller molecules
Endergonic Reaction - Answer Requires the input of free energy. Builds organic compounds from
smaller molecules.
Exergonic reaction - Answer Breaking down glucose to make ATP is an overall ____ reaction
DNA, Plasma membrane, cytoplasm, and ribosomes - Answer What structure components are present
in ALL cells
Cytoplasm - Answer semifluid substance enclosed by a cell's plasma membrane
Compare and contrast prokaryotic cells and eukaryotic cells - Answer SIMILARITIES:
1. They both have DNA as their genetic material.
2. They are both membrane bound.
3. They both have ribosomes .
4. They have similar basic metabolism .
5. They are both amazingly diverse in forms.
DIFERENCES:
1. eukaryotes have a nucleus, while prokaryotes do not
2. eukaryotes have membrane-bound organelles, while prokaryotes do not. The organelles of eukaryotes
allow them to exhibit much higher levels of intracellular division of labor than is possible in prokaryotic
cells.
3. Eukaryotic cells are, on average, ten times the size of prokaryotic cells.
4. The DNA of eukaryotes is much more complex and therefore much more extnsive than the DNA of
prokaryotes.
, 5. Prokaryotes have a cell wall composed of peptidoglycan, a single large polymer of amino acids and
sugar . Many types of eukaryotic cells also have cell walls, but none made of peptidoglycan.
6. The DNA of prokaryotes floats freely around the cell; the DNA of eukaryotes is held within its nucleus
and associated with histones (proteins)
What is the main function of the nucleus - Answer to hold a eukaryotic cell's DNA
What is the main function of the rough endoplasmic reticulum (ER) - Answer Modifies proteins made
by ribosomes attached to it
What is the main function of the smooth ER - Answer to make lipids, break down carbohydrates and
fats, and to inactivate toxins.
What is the main function of the golgi complex/apparatus - Answer to finish, sort, and ship lipids,
enyzmes, and proteins.
What is the main function of the mitochondria - Answer Energy powerhouse of the cell. Produces ATP
by aerobic respiration
What is the main function of the chloroplasts - Answer Specializes in photosynthesis
What is the main function of the central vacuole - Answer increases cell surface area; stores metabolic
wastes
What is the main function of the cell wall - Answer to structurally protect and support the cell
What is the main function of the cytoskeleton - Answer structurally supports and imparts shape to the
cell. Moves cell and its components
What is the main function of the plasmodesma - Answer communication junction between adjoining
cells
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