Question 1

Proteins which are passed from one Golgi compartment to the next in a successive fashion do so via a mechanism called____.

Accepted Answer

Proteins which are passed from one Golgi compartment to the next in a successive fashion do so via a mechanism called anterograde transport.

Question 2

Which of the following correctly describes the usefulness of SNAREs?
(I)They are essential for proper post-translation processing.
(II)They are a critical element in the function of the secretory pathway.
(III)They are effective at overcoming electrostatic repulsion between vesicle membranes.
(IV)They facilitate anchoring between vesicle membranes.

Accepted Answer

The answer of Which of the following correctly describes the...

Question 3

A researcher is developing a new drug for the treatment of influenza.Based on the information presented in the text about the influenza virus,which of the following drug reactions describes the action of this new drug?

Accepted Answer

The answer of A researcher is developing a new drug...

Question 4

Lipid bilayers with high concentrations of gangliosides are rare.Which of the following explanations is correct?

Accepted Answer

Gangliosides have large headgroups, which can hinder the close packing of lipid molecules in the bilayer.

Question 5

Which of the following lipids would NOT likely be found in a lipid raft?
(I)glycosphingolipids
(II)glycerophospholipids
(III)cholesterol
(IV)palmitoleic acid

Accepted Answer

The answer of Which of the following lipids would NOT...

Question 6

A researcher has designed a new drug that will block the release of certain neurotransmitters from the synaptic cleft.Which of the following reactions must be blocked by this new drug?

Accepted Answer

The drug should block the activity of SNARE proteins, which are essential for the fusion of synaptic vesicles with the presynaptic membrane, thereby preventing neurotransmitter release.

Question 7

Considering the characteristics of common fatty acids found in animals described in the text,which of the structures shown below would you consider the most rare fatty acid if found in animals?

Accepted Answer

The answer of Considering the characteristics of common fatty acids...

Question 8

Use the diagram below to answer the following question.The enzyme flipase would catalyze which of the following types of reactions?

Accepted Answer

Flipase catalyzes the flip-flop movement of lipids from one leaflet of the membrane to the other. Therefore, the most likely reaction that flipase would catalyze is the exchange of a lipid in position A for a lipid in position B.

Question 9

I-cell disease results in psychomotor retardation,skeletal deformities and death.Which of the following is true regarding this disease?

Accepted Answer

I-cell disease, also known as mucolipidosis II, is caused by the absence of a carbohydrate marker that normally directs lysosomal hydrolases to the lysosome. As a result, these enzymes end up secreted into the extracellular space instead of being delivered to the lysosome, leading to the inclusion of undigested glycosaminoglycans and glycolipids in the cytoplasm of affected cells. This accumulation leads to the symptoms of the disease, which include psychomotor retardation, skeletal deformities, and early death. B, C, and D are incorrect because they do not accurately describe the underlying mechanism of I-cell disease.

Question 10

Identify the compound below:

Accepted Answer

The answer of Identify the compound below: 
...

Question 11

Botox is used cosmetically to reduce wrinkles for a limited time interval.The function of Botox is described by which of the following?

Accepted Answer

Botox functions by inhibiting function of the SNARE protein, which is responsible for the release of acetylcholine in nerve terminals, thereby preventing muscle contraction and reducing the appearance of wrinkles.

Question 12

Which of the structures below is an example of an $\omega$-3 polyunsaturated fatty acid?

Accepted Answer

The answer of Which of the structures below is an...

Question 13

Which of the following structures correctly represents a glycerophospholipid?

Accepted Answer

The answer of Which of the following structures correctly represents...

Question 14

Which of the following processes presented in this chapter is (are)readily reversible with the help of enzymes known as thioesterases?

Accepted Answer

Thioesterases can cleave the thioester linkage between the fatty acid and cysteine residue during palmitoylation, making this process readily reversible. Myristoylation and glycosylphosphotidylinositalation are not reversible by thioesterases.

Question 15

Coated vesicles are used to ensure that the enclosed protein maintains its proper orientation.Clathrin is one type of protein used to coat vesicles.Which of the following is true regarding clathrin vesicles?

Accepted Answer

Clathrin vesicles are involved in transporting transmembrane proteins and GPI-linked proteins from the Golgi to the plasma membrane. They are not involved in transporting proteins between successive components of the Golgi compartments or from the ER to the Golgi. Clathrin forms a lattice-like structure, which helps in the formation of coated vesicles that protect protein structure and orientation during the transport from hydrophobic to hydrophilic environments.

Question 16

Which of the following statements describes one reason that plant oils are generally healthier for human consumption than animal fats?

Accepted Answer

Plant oils usually contain higher amounts of unsaturated fatty acids, which tend to be healthier for humans than saturated fatty acids found in animal fats. Unsaturated fatty acids are typically liquid at room temperature and can help reduce the risk of heart disease and stroke. Additionally, trans fatty acids, which are typically found in processed foods and some animal products, have been linked to numerous negative health effects. The higher degree of saturation in animal fats may also make them more difficult for the human body to digest and metabolize.

Question 17

Which of the following points to the correct location of attachment for a fatty acid which would yield a ceramide?

Accepted Answer

The answer of Which of the following points to the...

Question 18

Lung surfactants function to decrease the likelihood of collapse of the alveoli when air is expired.Based on your knowledge of lipids and amphipathic molecules,which of the following explains the mechanism by which the dipalmitoyl phosphatidylcholine (DPPC)can accomplish this task?

Accepted Answer

The inclusion of saturated fatty acids on the glycerophospholipid allows for close packing of the tail groups, which are fully extended and prevent collapse upon expiration. This stabilizes the alveoli and decreases the likelihood of their collapse.

Quiz 9: Lipids and Biological Membranes

Proteins which are passed from one Golgi compartment to the next in a successive fashion do so via a mechanism called____.

A researcher is developing a new drug for the treatment of influenza.Based on the information presented in the text about the influenza virus,which of the following drug reactions describes the action of this new drug?

Lipid bilayers with high concentrations of gangliosides are rare.Which of the following explanations is correct?

Which of the following lipids would NOT likely be found in a lipid raft? (I) glycosphingolipids (II) glycerophospholipids (III) cholesterol (IV) palmitoleic acid

A researcher has designed a new drug that will block the release of certain neurotransmitters from the synaptic cleft.Which of the following reactions must be blocked by this new drug?

Considering the characteristics of common fatty acids found in animals described in the text,which of the structures shown below would you consider the most rare fatty acid if found in animals?

Use the diagram below to answer the following question.The enzyme flipase would catalyze which of the following types of reactions?

I-cell disease results in psychomotor retardation,skeletal deformities and death.Which of the following is true regarding this disease?

Identify the compound below:

Botox is used cosmetically to reduce wrinkles for a limited time interval.The function of Botox is described by which of the following?

Which of the structures below is an example of an $\omega$ -3 polyunsaturated fatty acid? $Which of the structures below is an example of an \omega -3 polyunsaturated fatty acid? A) Structure A B) Structure B C) Structure C D) Structure D E) None of the above$

Which of the following structures correctly represents a glycerophospholipid?

Which of the following processes presented in this chapter is (are) readily reversible with the help of enzymes known as thioesterases?

Coated vesicles are used to ensure that the enclosed protein maintains its proper orientation.Clathrin is one type of protein used to coat vesicles.Which of the following is true regarding clathrin vesicles?

Which of the following statements describes one reason that plant oils are generally healthier for human consumption than animal fats?

Which of the following points to the correct location of attachment for a fatty acid which would yield a ceramide?

Lung surfactants function to decrease the likelihood of collapse of the alveoli when air is expired.Based on your knowledge of lipids and amphipathic molecules,which of the following explains the mechanism by which the dipalmitoyl phosphatidylcholine (DPPC) can accomplish this task?

Quiz 9: Lipids and Biological Membranes

Proteins which are passed from one Golgi compartment to the next in a successive fashion do so via a mechanism called____.

A researcher is developing a new drug for the treatment of influenza.Based on the information presented in the text about the influenza virus,which of the following drug reactions describes the action of this new drug?

Lipid bilayers with high concentrations of gangliosides are rare.Which of the following explanations is correct?

Which of the following lipids would NOT likely be found in a lipid raft? (I) glycosphingolipids (II) glycerophospholipids (III) cholesterol (IV) palmitoleic acid

A researcher has designed a new drug that will block the release of certain neurotransmitters from the synaptic cleft.Which of the following reactions must be blocked by this new drug?

Considering the characteristics of common fatty acids found in animals described in the text,which of the structures shown below would you consider the most rare fatty acid if found in animals?

Use the diagram below to answer the following question.The enzyme flipase would catalyze which of the following types of reactions?

I-cell disease results in psychomotor retardation,skeletal deformities and death.Which of the following is true regarding this disease?

Identify the compound below:

Botox is used cosmetically to reduce wrinkles for a limited time interval.The function of Botox is described by which of the following?

Which of the structures below is an example of an ω\omegaω -3 polyunsaturated fatty acid?

Which of the following structures correctly represents a glycerophospholipid?

Which of the following processes presented in this chapter is (are) readily reversible with the help of enzymes known as thioesterases?

Coated vesicles are used to ensure that the enclosed protein maintains its proper orientation.Clathrin is one type of protein used to coat vesicles.Which of the following is true regarding clathrin vesicles?

Which of the following statements describes one reason that plant oils are generally healthier for human consumption than animal fats?

Which of the following points to the correct location of attachment for a fatty acid which would yield a ceramide?

Lung surfactants function to decrease the likelihood of collapse of the alveoli when air is expired.Based on your knowledge of lipids and amphipathic molecules,which of the following explains the mechanism by which the dipalmitoyl phosphatidylcholine (DPPC) can accomplish this task?

Which of the structures below is an example of an $\omega$ -3 polyunsaturated fatty acid? $Which of the structures below is an example of an \omega -3 polyunsaturated fatty acid? A) Structure A B) Structure B C) Structure C D) Structure D E) None of the above$