UCI Bio 93 Midterm 1 Exam Questions and Answers |Complete Solutions Graded A+ |100%
Correct
What are the 2 types of fats? Saturated and unsaturated
Amino acids form ____________, which then form_____________ Polypeptides, Proteins
What 2 structures occur in secondary structure? Beta plated sheets and alpha helix
What is the chemical known as the "kiss of death" Ubiquitin
What happens to the proteins that are tagged with ubiquitin? They are sent to the
proteosomes.
What do protesomes do? Chop proteins for easier recycling.
What are the 2 types of nucleic acid? DNA and RNA
Where are phospholipids made? The Smooth ER
Most abundant glycoprotein in the ECM Collagen
What does collagen do for the cell? Forms strong fibers outside the cell.
What part of the ECM transmits signals between the ECM and the cytoskeleton? The
integrin
What does glyco mean? Presence of Carbohydrates
,What is the role of cholesterol on the plasma membrane? Maintain membrane fluidity
3 types of lipids Fats, phospholipids, and steroids
What does the endomembrane system do? Regulates protein traffic and metabolic
functions
What parts of the cell are on the endomembrane system? Nuclear envelope, GA, ER,
vesicles, lysosomes, plasma membrane
What is a ligand? A molecule that specifically binds to another, often larger, one
Where are disulfide bridges found? Tertiary structures
What weak bonds are found in tertiary structures? H, ionic, hydrophobic, and Van der Waals
interactions
What are van der waal interactions? Individually weak, but powerful when many occur
together.
What are the purines? Adenine and Guanine
What is a polymer of nucleic acids? A polynucleotide
What are the three steps in cell signaling? Reception, transduction, and response
How many rings do purines have? 2
, What are the 2 signals that act locally Paracrine signaling and synaptic signaling
Cell signals that travel to distant sites Hormones through the blood stream
Cell surface signals Antibodies
GPCR
What are Kinases? Enzymes that catalyze transfer of phosphate groups
What are the ligands of ligand-gated ion channels? Neurotransmitters
What are some of the ligands that can directly cross the membrane bilayer? Steroid
hormones, thyroid hormones, and NO
True or false:
Some ligand receptors can be in the cytosol or the nucleus True
What part of the cytoskeleton is responsible for the extension of pseudopodia.?
Microfilaments
What is the structure of a nucleotide? A phospate group, a nitrogen base, and a pentose
sugar
Where are Peptide bonds formed? Between AA
Correct
What are the 2 types of fats? Saturated and unsaturated
Amino acids form ____________, which then form_____________ Polypeptides, Proteins
What 2 structures occur in secondary structure? Beta plated sheets and alpha helix
What is the chemical known as the "kiss of death" Ubiquitin
What happens to the proteins that are tagged with ubiquitin? They are sent to the
proteosomes.
What do protesomes do? Chop proteins for easier recycling.
What are the 2 types of nucleic acid? DNA and RNA
Where are phospholipids made? The Smooth ER
Most abundant glycoprotein in the ECM Collagen
What does collagen do for the cell? Forms strong fibers outside the cell.
What part of the ECM transmits signals between the ECM and the cytoskeleton? The
integrin
What does glyco mean? Presence of Carbohydrates
,What is the role of cholesterol on the plasma membrane? Maintain membrane fluidity
3 types of lipids Fats, phospholipids, and steroids
What does the endomembrane system do? Regulates protein traffic and metabolic
functions
What parts of the cell are on the endomembrane system? Nuclear envelope, GA, ER,
vesicles, lysosomes, plasma membrane
What is a ligand? A molecule that specifically binds to another, often larger, one
Where are disulfide bridges found? Tertiary structures
What weak bonds are found in tertiary structures? H, ionic, hydrophobic, and Van der Waals
interactions
What are van der waal interactions? Individually weak, but powerful when many occur
together.
What are the purines? Adenine and Guanine
What is a polymer of nucleic acids? A polynucleotide
What are the three steps in cell signaling? Reception, transduction, and response
How many rings do purines have? 2
, What are the 2 signals that act locally Paracrine signaling and synaptic signaling
Cell signals that travel to distant sites Hormones through the blood stream
Cell surface signals Antibodies
GPCR
What are Kinases? Enzymes that catalyze transfer of phosphate groups
What are the ligands of ligand-gated ion channels? Neurotransmitters
What are some of the ligands that can directly cross the membrane bilayer? Steroid
hormones, thyroid hormones, and NO
True or false:
Some ligand receptors can be in the cytosol or the nucleus True
What part of the cytoskeleton is responsible for the extension of pseudopodia.?
Microfilaments
What is the structure of a nucleotide? A phospate group, a nitrogen base, and a pentose
sugar
Where are Peptide bonds formed? Between AA
