Question 6In membranes, one of the most common targets of reactive oxygen species aresaturated fatty acidspolyunsaturated fatty acidscholesterol

Fatty acids are carboxylic acids with a hydrocarbon chain. Saturated fatty acids are fatty acids…

Answered: Question 6 In membranes, one of the…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question 21 Two macromolecules, such as proteins, can adhere tightly and specifically to each other. How can weak intermolecular forces lead to such strong adherence? O the weak forces are readily converted to covalent bonds, thus leading to strong adherence between molecules O if the weak forces are correctly aligned they can become as strong as covalent bonds O adhesion is strong because the weak forces can be involved in condensation reactions O the weak forces can become very strong once non-polar groups are excluded from the inside of the molecules O adherence can be quite strong by having many weak forces involved in molecular adhesion • Previous
Question 12 Which of the following best explains the relatively more complex folded structure that an RNA molecule assumes? A B с D RNA molecules do not contain a pentose sugar in their backbone, which allows them to be more structurally flexible. RNA molecules contain the nitrogenous base uracil, which can pair with several other ni- trogenous bases in the RNA molecule. RNA molecules contain negatively charged phosphate groups in their backbone, which allows the molecule to bend into complex shapes. RNA molecules are made of only four types of nucleotides, which allows their nitroge- nous base to pair more readily.
Question 4 Lipids are the biomolecules of choice for storage of metabolic energy because they: O yield a large amount of energy after complete oxidation. O yield a large amount of energy after complete reduction O yield a large amount of energy after complete trans isomerization yield a large amount of energy after complete hydrolysis
Question 7 The malate transporter in the mitochondrial inner membrane is involved in two important biochemical processes: one catabolic, and one anabolic. What are they? Transport of NAD* from glycolysis from the cytosol to the matrix for oxidative phosphorylation, and the last step of glycolysis O A. The citric acid cycle, and the last step of glycolysis OB. The glycerol 3-phosphate shuttle system, and the first gluconeogenesis bypass Transport of FADH, from beta oxidation from the cytosol to the matrix for oxidative phosphorylation, and the first gluconeogenesis bypass OF Transport of NADH from glycolysis from the cytosol to the matrix for oxidative phosphorylation, and the first gluconeogenesis bypass
Question 12 The disulfide bridges: A Are generated by an intra- or inter- molecular oxidation reaction B Can be selectively reduced by SDS (Sodium Dodecyl Sulfate) C Are bonds that possess an intermediate in- teraction energy comprised between that hydrogen bonds and that of ionic bonds D Participate in the stabilization of sec- ondary structures E Are established between the side chains of amino acids methionine
Question 36 Biological membranes: A Are plasma membranes; B Are impermeable; C Are, such as micelles, lipid bilayers; D Are lipid bilayers with associated mem- brane proteins. E Do shape the cell;
Question 5 Which of the following subunits of ATP synthase is correctly described? a: site of ATP synthesis y: protons are transferred to this subunit, determines the number of protons transferred per ATP formed a: contains two half channels for transferring protons across the membrane
Question 19 Which of the following serve as signaling molecules located along the membrane? O sphingolipids Sterol lipids Glycolipids Phospholipids
QUESTION 5 Many bioactive compounds are derived from amino acids. This compound, illegal in most countries, is used as a hallucinogen used both for ritualistic purposes in some cultures and as a recreational drug. It is derived from an amino acid through removal of the backbone carboxylic acid group and dimethylation of the amino group. The amino acid from which it is derived must be: (Write out the entire name; Spelling matters, but case does not; Do not include L- or D- in the name; For acidic amino acids write the full name, e.g. "so-and-so acid") N ZI
QUESTION 20 Some of the stem cells in bone become osteoclasts during differentiation. Researchers have shown that chemical signals called cytokines are released into the extracellular fluid by bone stem cells in response to environmental stimuli. The researchers also have shown that the cytokines induce these same bone stem cells to differentiate into osteoclasts. This example illustrates how a(n). signal functions in the human body. O a. autocrine b. hormone O c. paracrine O d. juxtacrine e. intracellular
Question 11 The breakdown of large molecules by the enzymatic addition of water is an example of what kind of reaction? O 1. oxidation O 2. reduction O 3. condensation O 4. hydrolysis O 5. decarboxylation A Moving to another question will save this response. W AR SONY ASSIST BUtton, Onetouch
QUESTION 1 The Wnt signaling pathway component, Dsh, effects the action of B catenin by: O A. inhibiting the function of axin in the destruction complex O B. blocking GSK-3B from joining the destruction complex O C. stimulating ubiquitination of B catenin O D. causing its release into the cytosol from the plasma membrane complex O E. causing an increase in phophorylation of B catenin QUESTION 2 PCR can be used to identify the breakage points of mtDNA that are joined to form a mitochondrial genome with a deletion. This techni que uses: O A. two primers outside the deleted region; a long PCR extension segment. O B. one primer within the deleted region and one primer outside the deleted region; a long PCR extension segment O C. one primer within the deleted region and one primer outside the deleted region; a short PCR extension segment O D. two primers outside the deleted region; a short PCR extension segment O E. two primers within the deleted region; a short PCR extension segment

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Question 6 In membranes, one of the most common targets of reactive oxygen species are saturated fatty acids polyunsaturated fatty acids cholesterol