Quiz Submissions - Exam 1- Chapters 1-6 Attempt Score: - 100
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Attempt 1
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Question 1 2..5 point
If an integrin protein is mutated what cell function might be affected?
communication between cytoskeleton and proteglycan
fluidity of
phospholipids
cellular motility
cytoplasmic
communication See Q
Question 2 2..5 point
# 1 feedback
You and your roommate are grocery shopping. “I don’t get it,” she says. “My doctor said I should buy this
special milk because I don’t digest it well. But this brand says ‘lactose-free’ and this brand says ‘lactase
added’ – which do I want?”
You reply: “The
is a sugar in milk that you have trouble digesting, and
is an enzyme that will digest it for you.
lactase, lactose
lactose,lactase
See Q # 2 feedback
Question 3 2..5 point
What is the first step in Na+-K+ pump?
The carrier protein has a reduced affinity for Na+
shape change increases the carrier's affinity for K+ ions
Carrier protein binds to 3 Na+
ATP is hydrolyzed by a protein carrier
Phosphate group is removed and K+
attach See Q # 3 feedback
Question 4 2..5 point
, What examples describe the second law of thermodynamics? Select all that apply.
A penny will fall when you pick it up and let it drop.
A frying pan is on a hot stove. When removed it will cool.
Ice cubes will melt in a warm room.
Question 5 2..5 point
In biological macromolecules like proteins, the hydrophobic residues tend to clump together in the interior
of the folded structure. What is the best explanation for why this occurs?
Hydrophobic residues bind each other, while polar residues cannot bind each other. Therefore the
hydrophobic ones end up stuck to each other in the core of the protein.
Polar residues tend to bind to water in the cytoplasm as well as to each other. The water and polar residues cannot bind to the hydrophobic ones, so i
Protein folding machinery interprets the amino acid code to pack hydrophobic residues into the center of
proteins. This process must be important, because the cell expends large amounts of ATP to precisely
coordinate protein folding.
Hydrophobic residues bind to each other in specific ways. For instance, Ala forms di-methyl bonds, and
phenylalanine binds isoleucine. This creates a tightly bound hydrophobic inner core.
Question 6 2..5 point
Cardiac muscle requires junctions that allow electrical signals through. Cardiac muscle also relies on
calcium to contract. What junction is involved and what organelle stores calcium?
desmosomes, smooth ER
plasmodesmata, rough ER
gap, smooth ER
See Q # 6 feedback
Question 7 2..5 point
Before the battery in the car is jumped, the individuals notice the hook-ups on the battery are corroded by
acid. What substance can be used to clean the acid?
orange juice
baking soda
black
coffee
lemons
See Q # 7 feedback
Question 8 2..5 point
are used for energy storage.
%
Attempt 1
Submission View
Your quiz has been submitted successfully.
Question 1 2..5 point
If an integrin protein is mutated what cell function might be affected?
communication between cytoskeleton and proteglycan
fluidity of
phospholipids
cellular motility
cytoplasmic
communication See Q
Question 2 2..5 point
# 1 feedback
You and your roommate are grocery shopping. “I don’t get it,” she says. “My doctor said I should buy this
special milk because I don’t digest it well. But this brand says ‘lactose-free’ and this brand says ‘lactase
added’ – which do I want?”
You reply: “The
is a sugar in milk that you have trouble digesting, and
is an enzyme that will digest it for you.
lactase, lactose
lactose,lactase
See Q # 2 feedback
Question 3 2..5 point
What is the first step in Na+-K+ pump?
The carrier protein has a reduced affinity for Na+
shape change increases the carrier's affinity for K+ ions
Carrier protein binds to 3 Na+
ATP is hydrolyzed by a protein carrier
Phosphate group is removed and K+
attach See Q # 3 feedback
Question 4 2..5 point
, What examples describe the second law of thermodynamics? Select all that apply.
A penny will fall when you pick it up and let it drop.
A frying pan is on a hot stove. When removed it will cool.
Ice cubes will melt in a warm room.
Question 5 2..5 point
In biological macromolecules like proteins, the hydrophobic residues tend to clump together in the interior
of the folded structure. What is the best explanation for why this occurs?
Hydrophobic residues bind each other, while polar residues cannot bind each other. Therefore the
hydrophobic ones end up stuck to each other in the core of the protein.
Polar residues tend to bind to water in the cytoplasm as well as to each other. The water and polar residues cannot bind to the hydrophobic ones, so i
Protein folding machinery interprets the amino acid code to pack hydrophobic residues into the center of
proteins. This process must be important, because the cell expends large amounts of ATP to precisely
coordinate protein folding.
Hydrophobic residues bind to each other in specific ways. For instance, Ala forms di-methyl bonds, and
phenylalanine binds isoleucine. This creates a tightly bound hydrophobic inner core.
Question 6 2..5 point
Cardiac muscle requires junctions that allow electrical signals through. Cardiac muscle also relies on
calcium to contract. What junction is involved and what organelle stores calcium?
desmosomes, smooth ER
plasmodesmata, rough ER
gap, smooth ER
See Q # 6 feedback
Question 7 2..5 point
Before the battery in the car is jumped, the individuals notice the hook-ups on the battery are corroded by
acid. What substance can be used to clean the acid?
orange juice
baking soda
black
coffee
lemons
See Q # 7 feedback
Question 8 2..5 point
are used for energy storage.
