Concept explainers
(a)
Interpretation: The validation of the given statement about the steroid nucleus has to be stated.
Concept introduction: The structure of the lipid that is based upon the fused system of rings which includes three identical six-membered rings and only one five-membered ring is known as steroid. The fused ring system of the steroid is known as the steroid nucleus.
(b)
Interpretation: The validation of the given statement about the steroid nucleus has to be stated.
Concept introduction: The structure of the lipid that is based upon the fused system of rings which includes three identical six-membered rings and only one five-membered ring is known as steroid. The fused ring system of the steroid is known as the steroid nucleus.
(c)
Interpretation: The validation of the given statement about the steroid nucleus has to be stated.
Concept introduction: The structure of the lipid that is based upon the fused system of rings which includes three identical six-membered rings and only one five-membered ring is known as steroid. The fused ring system of the steroid is known as the steroid nucleus.
(d)
Interpretation: The validation of the given statement about the steroid nucleus has to be stated.
Concept introduction: The structure of the lipid that is based upon the fused system of rings which includes three identical six-membered rings and only one five-membered ring is known as steroid. The fused ring system of the steroid is known as the steroid nucleus.
Want to see the full answer?
Check out a sample textbook solutionChapter 19 Solutions
GENERAL,ORGANIC,+BIO.CHEM.-MINDTAP
- The synthesis of phosphatidylcholine from phosphatidylethanolamine requires: a. Tetrahydrofolate b. Glycine c. Choline d. S-Adenosylmethioninearrow_forwardDefine the following terms: a. respiratory control b. glycerol-3-phosphate shuttle c. uncoupling protein d. oligomycin e. malate–aspartatearrow_forwardWhich one of the following statements about the molecular structure of phosphatidylcholine is TRUE? a. It contains an isoprene chain. b. It contains a polar hydrophobic head group. c. It contains at least five alkene double bonds. d. It contains a phosphodiester bond. e. It contains a glycosidic linkage.arrow_forward
- One such laboratory study investigated the binding of a hormone to three different receptor proteins in the cell membrane. The data collected are shown in the table below 1) Provide a brief explanation as to why ligand binding toproteins must be a reversible process. 2) Calculate the dissociation constant (Kd) for the hormone binding to each of the three proteins.arrow_forward1 2 3 4 description Cell membranes in both plants and animals are primarily made of this kind of molecule. This kind of molecule is usually a short-lived messenger molecule that conveys information about pain and inflammation. When circulating nutrients are insufficient to meet the body's energy needs, this type of molecule is broken down into smaller molecules that can be oxidized in cells to supply energy. This molecule is the starting point for the synthesis of many hormones, including the sex hormones testosterone and estradiol. Which molecules fit this description? 0 0 U 0 none of them 0 none of them Onone of them none of themarrow_forwardWhich of the following molecules do NOT contribute atoms to purine synthesis? a. Glutamine b. Aspartate c. Glycine d. Lysinearrow_forward
- Which of the following about adenosine triphosphate (ATP) is FALSE? A) There are two phosphoanhydride bonds with similar energies B) ATP can be used as a substrate to make cyclic AMP (cAMP) after a cell has been stimulated with certain specific hormones C) The γ-phosphate can be transferred (e.g. to chemical group on a protein enzyme) such as the Na+-K+ pump, which is part of a coupling mechanism that allows otherwise unfavourable reactions to proceed No possible answer provided E) The large, negative, free-energy change upon hydrolysis of “high-energy” compounds like ATP is partly due to the creation of resonance stabilized productsarrow_forward45. Receptor tyrosine kinases (RTK)s are the high-affinity cell surface receptors for many polypeptide growth factors, cytokines, and hormones. The following statements are about receptor tyrosine kinases. A. Receptor tyrosine kinases will undergo conformational changes upon binding of ligands, but cannot move across cell membranes upon binding of ligands. B. Receptor tyrosine kinases can bind certain protein phosphatases. C. Receptor tyrosine kinases can only phosphorylate themselves (called autophosphorylation) but do not phosphorylate other proteins/enzymes. D. Receptor tyrosine kinases phosphorylate one or more specific tyrosine residues, but not all tyrosine residues of a particular protein. The correct statement(s) is(are): a) only A andD b) only B and C c) only B and D d) only A, B and D e) All of them Your answer: luoore is a nolararrow_forwardThe alpha-keratin of hair is rich in the amino acid cysteine. The location of these cysteines in the protein chain is genetically determined. As a result of the location of the cysteines in the protein, a person may have curly, wavy, or straight hair. How can the location of cysteines in a-keratin result in these different styles of hair? Propose a hypothesis to explain how a “perm” causes straight hair to become curlyarrow_forward
- a. A substitute for Triclosan to study as an alternative for Triclosan. b. Decide if you hyposthesize that the Triclosan alternative is safer than Triclosan or not. c. Distribute the workarrow_forwardRefer to the figure below and answer the following questions: Legend: Blue – wild-type β-galactosidase; Red – mutant β-galactosidase _________ a. What is the optimum pH of wild type β-galactosidase? _________ b. What is the optimum temperature of mutant β-galactosidase? _________ c. Which enzyme has the greater activity at pH 7.2? _________ d. Which enzyme has the greater activity at a temperature of 42.5oC? _________ e. Which enzyme has greater activity if pH decreases from 7.5 to 6.4? _________ f. Which enzyme has greater activity if temperature increases from 40oC to 41 oC?arrow_forwardAn example of a glycerophospholipid that is involved in cell signaling is: O A. ceramide O B. arachidonic acid. OC. Vitamin A (retinol) O D. phosphatidylinositol 4,5-bisphosphate O E. testosterone CS Scanned with CamScannerarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education