SJSU Biol 30 Exam 3 questions and
answers
Which cytoskeleton component can be assembled and disassembled
quickly?Actin Filaments and Microtubules
Which organelles participate in protein folding?Golgi Complex and rough
endoplasmic reticulum
Which shape will have the lowest surface ...
SJSU Biol 30 Exam 3 questions and
answers
Which cytoskeleton component can be assembled and disassembled
quickly?✔✔Actin Filaments and Microtubules
Which organelles participate in protein folding?✔✔Golgi Complex and rough
endoplasmic reticulum
Which shape will have the lowest surface area to volume ratio?✔✔Sphere
Which of the following is true about cells that specialize in nutrient
absorption?✔✔They have a high surface area to volume to ratio.
Which type of lipid composition would require the greatest amount of energy to pull
into microvili?✔✔Membrane with a high concentration of cholestrerol
To make microvili, which of the following is not necessary?✔✔Intermediate
Filaments
True of False: The cell membrane and the endoplasmic Reticulum.✔✔False
If you wanted the smallest diameter tube with which types of lipids should you
use?✔✔Rigid Lipids
What is the difference between saturated fat and unsaturated fat?✔✔Saturated fatty
acids: (hard) fat, fatty acids with single bonds between all carbon pairs, lack double
bonds between the individual carbon atoms
Saturated fats tend to be solid at room temperature and from animal sources
Unsaturated fatty acids: (oil) fatty acids that contain double bonds between one or
more pairs of carbon atoms
Unsaturated fats are usually liquid and from plant sources
What functions do lipids play in the cell?✔✔Cell structure
Separate cell from environment (permeability barriers)
Localization of proteins/reactions
Membrane-bound organelles (Eukaryotes)
Signaling molecules (steroid hormones)
Signal transduction
The plasma membrane of an organism who lives in extreme hot temperatures is
likely to contain (saturated or unsaturated) fatty acid. What about for the organisms
that live in extreme cold temperatures?✔✔Hot environments= saturated fats
Cold environments= unsaturated fats
What are the 3 types of lipids?✔✔Triglycerides, Steroids, phospholipids
, Define Triglycerides✔✔Common type of lipid, 3 fatty acids and a clycerol molecule
are linked by an ester bond formed during dehydration synthesis
Defines phospholipids✔✔One fatty acid is phophate group. P group is polar and
hydrophilic.
Hydrophilic head. Hydrophobic tail.
Steroids✔✔4 carbon chain ring with side chains
Define cytoskeleton✔✔provides internal structure that determines cell shape
What type of biomolecule(s) make up the cytoskeleton?✔✔proteins
Can cells alter their surface area to volume ratio by making membrane out of
different lipids?✔✔Yes, using microvilli
List 3 homologs of cytoskeleton discovered in bacterial cells✔✔Actin, Intermediate
Fibers, Microtubules
Define Actin✔✔Serves as a track for myosin, a motor protein:
Muscle contraction
Cytokinesis after mitosis
Highways for cargo transport
Assemble and disassemble quickly and involved in cell movement/motility
Provides cell structure
Define Intermediate Fibers✔✔More permanent than actin
One type is made of keratin and found in hair, nails, & skin
Play mainly a structural role for cells and organelles
Maintains cell shape
anchors nucleus
Define microtubules✔✔Largest diameter
Grow and Shrink quickly
Provide track for kinesin and dynein motor proteins
Function in vesicle and protein trafficking
Play a structural role & help cells resist compression
{Also form cilia, flagella, and centrosomes (Eukaryotes)}
Does cholesterol make the cell membrane more rigid or more flexible?✔✔More rigid
and less permeable to other molecules or ions in high temperature
Define Sympathetic Nervous System✔✔Fight or Flight
Increase Glucose
Increase Blood oxygen
Shuts off every other system
Increase respiration
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 WorkAce. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
