Exam (elaborations)
Bio 161 Psu Exam 1 Questions And Answers With Verified Solutions Already Passed!!!
- Course
- Institution
Bio 161 Psu Exam 1 Questions And Answers With Verified Solutions Already Passed!!!
[Show more]
Content preview
Bio 161 Psu Exam 1 Questions AndAnswers With Verified Solutions Already
Passed!!!
Monomer
A monomer is a single molecular unit of a polymer.
Polymer
A polymer is a molecule containing many repeating monomers.
Three Main Types of Lipids
The three main types of lipids are:
o Triglycerides
o Phospholipids
o Steroids
Function of Phospholipids
Phospholipids are essential components of cell and organelle membranes.
Composition of Phospholipids
Phospholipids are composed of:
o Fatty acids
o Phosphate group
o Glycerol
Function of Triglycerides
Triglycerides function in energy storage and insulation.
Composition of Triglycerides
Triglycerides consist of:
o 1 glycerol
o 3 fatty acids
Protein
Proteins are polymers of amino acid monomers.
Nucleic Acids
Nucleic acids have functions in:
o Hereditary information (DNA)
o Protein synthesis (RNA)
Gene Expression
Gene expression is the process of making proteins from the information
encoded in DNA.
Transcription
Transcription is the process of making a working copy of a gene, which is
RNA.
Translation
, Translation is the process of translating nucleotides in RNA into amino
acids to form proteins.
Cytoplasm
Cytoplasm is the fluid inside the cell where many cellular reactions,
including some involved in cellular respiration, occur.
Nucleus
The nucleus is the location of DNA and is surrounded by a nuclear
membrane that helps regulate the transport of molecules in and out of the
nucleus.
Endoplasmic Reticulum (ER)
The ER is made of lipids and is the location of translation (protein
synthesis) via ribosomes.
Ribosomes
Ribosomes are organelles made of protein and RNA that direct protein
synthesis in the cytoplasm.
Golgi Bodies
Golgi bodies are stacks of membranes that package proteins for transport
in the membrane.
Vesicles
Vesicles are small membrane sacs that specialize in moving products into,
out of, and within a cell.
Mitochondria
Mitochondria are responsible for ATP production (cellular respiration).
They have small, circular DNA inherited from the mother and mutations can
lead to diseases.
Cytoskeleton
The cytoskeleton is a network of proteins in the cytoplasm that provides:
o Structural support
o Tracks for the transport of organelles or vesicles
o Important roles in muscle function
Plasma Membrane
The plasma membrane is made of:
o Phospholipids
o Cholesterol
o Membrane proteins
Selective Permeability of Plasma Membrane
The plasma membrane is selectively permeable due to the hydrophobic
chains (tails) and hydrophilic heads of phospholipids.
Factors that Affect Diffusion Across Membranes
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller classhub. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
50064 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now