Which of the following statements is incorrect? The rigidity of a saturated fatty acid is based on the strong bonding between sp3-hybridized carbon chains. Glycerophospholipids are the most abundant lipids in cellular membranes. In delta notation of fatty acid nomenclature, the numbering starts at the α-carbon from the carboxylic acid end. Hormones, such as testosterone, estradiol and progesterone are examples of steroidal lipids.

Which of the following statements is incorrect? The rigidity of a saturated fatty acid is based on the strong bonding between sp3-hybridized carbon chains. Glycerophospholipids are the most abundant lipids in cellular membranes. In delta notation of fatty acid nomenclature, the numbering starts at the α-carbon from the carboxylic acid end. Hormones, such as testosterone, estradiol and progesterone are examples of steroidal lipids.

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter2: Molecules Of Life

Section: Chapter Questions

Problem 8SQ: Unlike saturated fatty acids, the tails of unsaturated fatty acids incorporate one or more _______....

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Unlike saturated fatty acids, the tails of unsaturated fatty acids incorporate one or more _______. a. phosphate groups b. glycerols c. double bonds d. single bonds
Select the correct statement about unsaturated fatty acids: 1. Unsaturated fatty acids have extra nitrogen atoms in their hydrophobic tails compared to saturated fatty acids 2. Unsaturated fatty acids have multiply bonded carbons in their hydrophobic tails compared to saturated fatty acids which have only single bonded carbons 3. Unsaturated fatty acids have no bends in their hydrophilic fatty acid tails 4. Unsaturated fatty acids have relatively more hydrogen atoms in their hydrophobic tails compared to saturated fatty acids
Which of the following is true of sphingolipids? They always contain glycerol and fatty acids. They may be charged, but are never amphipathic. They contain two esterified fatty acids. Phosphatidylcholine is a typical sphingolipid. The sphingosine backbone is O-linked to a head group.
Which of the following statements is/are true? 1. Sphingolipids all have a palmitate derivative that is ester-linked to the sphingosine backbone. 2. The addition of cholesterol will always lead to an increase in the rigidity of a lipid bilayer. 3. Glycolipids may have a sphingosine or a glycerol backbone to which a sugar moiety is attached. 4. All lipid molecules are characterized by the presence of a carboxylic acid functional group. O 1 and 2 O 1 only O 2 and 3 O 3 only O 1,3, and 4
Cholesterol has a fused four – ring core and is part of body membranes. The -OH group on C-3 is the polar head, and the rest of the molecule provides the hydrophobic tail that does not fit into the zigzag packing of the hydrocarbon portion of the saturated fatty acids. Considering this structure, tell whether cholesterol contributes to the stiffening (rigidity) or the fluidity of a membrane.
Draw the skeletal structure of a triacylglycerol that contains three molecules of palmitic acid. Note: Reference the Selected fatty acids table for additional information. Click and drag to start drawing a structure.
TRUE OR FALSE Lipids are insoluble in water but soluble in ether TAG mean triacylglycerol Phospholipids function as membrane lipids TAG contains fatty acids and glycerol Fatty acids contains even number of carbon atoms Saturated fatty acids have low melting points Butyric acid usually comes from coconut oil Unsaturated fatty acids contain single bonds only in their structure Arachidonic acid contains 3 double bonds Theobroma oil is a liquid fat
What is the common structural feature of all phospholipids and glycero esters? both contains glycerol both contains unsaturated and saturated fatty acids both contains phosphates . both A and B all of these
An illustration of a simple triacylglycerol is given. Choose which type of fatty acid is described by each of the given phrase Choices: A, B, C (Refer to picture) 1. a hydrocarbon chain that bends once 2. a polyunsaturated fatty acid chain 3. cannot be saturated by vitamins 4. absorbs the highest number of iodine 5. can be completely saturated by an I2 molecule
The common amino acids are polyprotic acids. All amino acids contain an amino group and a carboxyl group. Some amino acids contain ionizable side chains. The presence of an ionizable side chain creates a third ionizable group. For a diprotic amino acid such as glycine (structure shown below), three forms are possible. These forms, the fully protonated (AA*), single deprotonated (AA°), and completely deprotonated (AA) exhibit different acid-base properties. NH;+ NH,+ NH, Neutral H,A (AA+) A- (AA•) (AA-) The Ka describing the AA* and the AA° equilibrium is 4.57 x10-3, while the Ka involving AA° and the anionic form AA- is a much smaller 2.51 x 10-10, The neutral form, AA° is referred to as isoelectric glycine. All amino acids can assume the isoelectric form under proper conditions. a. Calculate the pH of a 0.1 M solution prepared from the salt glycine hydrochloride (hint: use ICE table).
Lipoprotein particles (Figure 3.18) are spherical clusters of protein and lipid molecules that circulate in the blood of animals and are rather substantial in size (see Figure 3.11). They function similarly to suitcases, transporting cholesterol, fatty acid residues, triglycerides, and phospholipids from one location in the body to another throughout the body. In light of your knowledge of lipid insolubility in water, which of the four types of lipids would you expect to be on the exterior of a lipoprotein clump that is bathed in the water-based fluid part of blood?
When a substance such as sodium chloride is dissolved in water, the ions become completely surrounded by water molecules, forming structures called hydration spheres. When the sodium salt of a fatty acid is mixed with water, the carboxylate group of the molecule becomes hydrated, but the hydrophobic portion of the molecule is poorly hydrated, if at all. Using a circle to represent the carboxylate group and an attached squiggly line to represent the hydrocarbon chain of a fatty acid, draw a picture of how fatty acids interact with water.

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		The rigidity of a saturated fatty acid is based on the strong bonding between sp₃-hybridized carbon chains.
		Glycerophospholipids are the most abundant lipids in cellular membranes.
		In delta notation of fatty acid nomenclature, the numbering starts at the α-carbon from the carboxylic acid end.
		Hormones, such as testosterone, estradiol and progesterone are examples of steroidal lipids.