True or false 1. During fatty acid biosynthesis, acetyl CoA is the donor of the acetyl group. 2. Pyruvate serves as the precursor of the glycerol backbone during TAG biosynthesis. 3. Malonyl CoA is an inhibitor of acetyl CoA carboxylase. 4. HMG-CoA serves as the common intermediate of cholesterol biosynthesis and ketogenesis.
Q: Differentiate the lock-and-key model from the induced fit hypothesis
A: In biochemistry the enzymes catalyze chemical reactions and the substrate is a molecule upon which…
Q: Which of the following is incorrect? a. Hemoglobin transports oxygen through the blood from the…
A: Haemoglobin is a transport protein that is important for the transport of gases like oxygen in the…
Q: What do you think is the most important in biomolecules? Explain
A: Biomolecule are organic molecules present in living organisms. Biomolecules are classified as macro…
Q: 2. | Calculate the overall charge (pH 7) on the following three polypeptides and answer the…
A: Proteins or peptides are composed of twenty standard amino acids that differ from each other on the…
Q: 4. Lactose Intolerance (Enzymes) Carol was recovering from a terrible bout with the flu, having been…
A: Enzymes are a class of proteinaceous compounds that facilitate the successful completion of a…
Q: Consider the structure of the amino acid L-alanine. Which functional groups are common to all amino…
A: All amino acids consist of four moieties - one hydrogen atom (H), one carboxyl group (COOH), one…
Q: Which of the following is incorrect about the conversion of pyruvate and NADH to lactate and NAD+? O…
A: If a cell lacks mitochondria or sudden need of energy arises due to rapid consumption of oxygen by…
Q: What will be the predominant form(s) of the amino acid at pH (i) 1.5; (ii) 3.0; (iii) 4.5; (iv) 6.0;…
A: Amino acids contain many ionizable groups which can present in protonated and deprotonated states.…
Q: A shortage of available ATP would hinder a cell's ability to import Select one: a. water. b. oxygen.…
A: The movement of molecules inside cell is governed by the plasma membrane that encloses it. The…
Q: Which of the following is incorrect about glycogen? O a. None; all the other choices are correct O…
A: Introduction: Glycogen is a stored product of glucose molecules. Glycogen helps to secrete glucose…
Q: Select 3 research articles related to any analytical laboratory technique used for analysis and…
A: There are various analytical techniques used for the analysis in Biochemistry, one of the frequently…
Q: Why we called the blood urea nitrogen not serum urea, although we called the serum creatinine??
A: A Blood urea and serum creatinine test is two different tests are done to check the kidneys…
Q: What class of enzyme most likely catalyzes the reaction shown in the figure? (choose the one best…
A: Given that Fumarase enzyme catalyses the reversible hydration of fumarate to S-malate. Fumarase…
Q: Which of the following is incorrect about the conversion of pyruvate (with 3 C) and CO₂ to…
A: In gluconeogenesis, glucose is synthesized from non-carbohydrate sources e.g., amino acids,…
Q: in a randomly mating laboratory population of Drosophila, 4% of the flies have black bodies, and 96%…
A: Since there are multiple questions, I will answer the first question.
Q: Insulin does not enter the cell that it affects. Instead, it starts a signal cascade within the…
A: Cell signaling is the way of communication of cells. It involves cascades of chemical reactions in…
Q: Fig. 1 180 120 60 0 Psi -60 -120- -180- Fig. 2 180 120 60 0 Psi -180 -60 -120- -180- -120 -60 -180…
A: Protein is a polymer of amino acids. The sequence of amino acids in turn dictate the final…
Q: of the following is incorrect about the sphingolipids? a. The backbone is sphingosine which has an…
A: Sphingolipids are a type of lipid present in cell membranes containing a backbone of sphingoid…
Q: n Multi-Column Purification of rGFP. What happens to the protein amount, protein purity, and/or…
A: Protein purification is a series of steps or processes that are intended to isolate one or a few…
Q: The entire set of chemical reactions occurring in a living system is referred to as: O a..…
A: The regulation of metabolism involves the processes by which metabolic pathways (both the anabolic…
Q: QUESTION 2 An isocitrate dehydrogenase assay was performed on the enzyme sample and found to give an…
A: Given Values: ∆A =0.5ε=6220 M-1 cm-1l = 1 cm
Q: Two pathways that yield NADPH in the cytosol, needed for fatty acid biosynthesis, are: (1) (2)
A: Since there are multiple questions and which question is to be solved has not been specified, as per…
Q: Why do organic eggs and non-organic eggs have the same elasticity? Why do organic milk and…
A: Price elasticity of demand for a good is the measurement of the relationship between change in price…
Q: Which of the following is an achiral amino acid? alanine arginine proline glycine Previous Page Next…
A: Q1 two categories represent a classification of all lipids based on their molecular structure is…
Q: From the various reactions you have learned in catabolism of amino acids; list three reactions in…
A: Catabolism of proteins releases amino acids which composed of mainly two parts-amino nitrogen (in…
Q: See attached, you have a table that is perhaps required for some of the questions. Answer question…
A: The food that we eat contains proteins which need to be broken down and absorbed for its…
Q: Explain the structure of Human muscle fructose 1,6-biphosphate aldolas complexed with fructose…
A: Introduction: Fructose 1,6 bisphosphate aldolase is a ubiquitous cytosolic enzyme involved in the…
Q: Consider the peptide with the sequence SANTACLAUSISASTALKER. Assume this entire pepide were a single…
A: Proteins are the heteropolymers of amino acids. The proteins are made up of twenty standard amino…
Q: Delimiate the outcome of of the use of cationic porphyrins as the Choice for the treatment of cancer…
A: Photodynamic therapy (PDT) is a marginally invasive therapeutic procedure that can apply selective…
Q: present the chemical mechanism of the HIV protease. Discuss the mode of action of some inhibitors of…
A: - Proteases are enzymes that can break down proteins into peptides. HIV-1 protease (PR) is an…
Q: a peptide has the sequence: Asp-His-Tyr-Cys. What is the net charge on this molecule at pH 7.0? Will…
A: Given, Asp-His-Tyr-Cys thus considering Asp at the amino terminal and Cys at the carboxylic terminal…
Q: Part 4 7. What was the optimal pH for amylase? Explain how your iodine test results support your…
A: In the given experiment we are using iodine test to test the enzyme activity of amylase. Amylase is…
Q: Check the box under each structure in the table that is an enantiomer of the molecule shown below.…
A: Enantiomers are mirror images which can not be superimposed, hence, they are non-superimposable…
Q: There are 20 primary amino acids that make up all proteins. But why those 20? Why Leucine? Arginine?…
A: The name amino acids indicates that it is a compound containing both amine group and a carboxylic…
Q: Thank you for taking the time to explaining this exercise. however, as I mentioned earlier I'm not…
A: The enzymes are protein molecules and they increase the rate of reaction by decreasing the…
Q: Amylase is an enzyme that catalyzes the release of smaller sugar molecules from starch.…
A: α-amylase and α-glucosidase digest the carbohydrates to simple form i.e glucose, thereby increases…
Q: The picture below is of an amino acid called lysine: H₂N. NH₂ OH Download During a period of…
A: Glucose molecules are metabolized through the glycolytic pathway to derive energy in the form of ATP…
Q: Is there any other way to do this excersise? Aparently the correct answer is 1.32 x10^-4 s^-1
A: Given Values: Volume = 400 μl = 0.004 Litre Moles of the enzyme = 0.2 moles Vmax = 6.6×10-3 M/s Km =…
Q: Table 1 shows the kinetic data that have been obtained for glucoamylase from Aspergillus niger at…
A: According to Michaelis-Menten Kinetics, when the rate or velocity of an enzyme catalyzed reaction…
Q: If I take a sample of a person's white blood cells, 60% to 70% of them will be the "first responder"…
A: White blood cells are also known as leukocytes which are involved in the immune responses. They're…
Q: Put these concentrations in decreasing order of magnitude (that is the largest concentration first…
A: Given Values: Acrylamide stock conc. = 30% SDS stock = 10% Final concentration in the gel = 12%…
Q: Which of the following pathways would be considered stage 3 catabolism? (Choose all correct…
A: Hi, thank you for posting the question on Bartleby. As per the guidelines, we can answer only one…
Q: Thank you so much. I had already calculated this exercise, but I thought that I did it wrong,…
A: Michaelis–Menten rate equation relates the Vo (initial reaction rate), Vmax (maximum reaction rate),…
Q: Integral membrane proteins can exist as all of the following, except: a. A single helix A beta…
A: An integral or intrinsic membrane protein abbreviated as IMP is one type of membrane protein that is…
Q: H₂N-CH CH₂ CH₂ + H₂O NAD+ NADH + H+ 9 =0 O=C CH₂ CH₂ + NH₂+
A: The enzyme commission has given the name for each enzyme in addition to their trivial names. It…
Q: Indicate what will happen ( increase, decrease or no effect) tothe activity of the enzyme or rate of…
A: Metabolism refers to the anabolism as well as catabolism of biomolecules including lipids, proteins,…
Q: Show the order of elution from a cation-exchange resin using a buffer pH of 4.5: aspartic acid,…
A: A cation exchange resin is one that exchanges cations. The resin in this is negatively charged. At a…
Q: You take the PKA catalytic subunit, the regulatory subunit, and the dimerization domains and mix…
A: As given in the question; the regulatory, catalytic and dimerisation domains of PKA were taken in…
Q: Which of the following is incorrect? a. Amino acids may have one or more triplet codes or codons b.…
A: A codon is a sequence of triplet nucleotides (a set of three consecutive nucleotides) on DNA or RNA…
Q: In the provided picture I am to select the FIVE compunds that would be the most stable in a CELL…
A: The cell membrane is a lipid bilayer. The lipid molecules are amphipathic, that is one end of the…
True or false
1. During fatty acid biosynthesis, acetyl CoA is the donor of the acetyl group.
2. Pyruvate serves as the precursor of the glycerol backbone during TAG biosynthesis.
Step by step
Solved in 5 steps
- Select the BEST answer. Increasing the concentration of Fructose-2,6 bisphosphate would Inhibit Phosphofructokinase 2 Increase the concentration of Fructose-1,6 bisphosphate (phosphofructose isomerase) O increase the synthesis of glycogen Increase the carboxylation of Ac-CoA to make more malonyl-CoA increase the concentration of PyruvateTrue or False e. Triacylglycerols and glycerophospholipids both contain fatty acids and saponifiable. True False f. Pyruvate serves as the precursor of the glycerol backbone during TAG biosynthesis. True False. Glucagon secretion causes inhibition of intracellular acetyl-CoA car- boxylase activity by several mechanisms. Name all you can think of.
- G. ENZYME CLASSIFICATION. Identify the main class of enzymes used to catalyzed the following reactions: 1. Lactate dehydrogenase: NADH+H NAD HC-OH CH3 CH Pynnte Lactate 2. Methylmalonyl-CoA mutase: CH CH SCOA CH,CH, SCOA coenzyme B12 COO COO methylmalonyl-CoA succinyl-CoA 3. Enolase: 0. H–Ċ–0–P–0- C-0–P-0- + H,0 HO–CH, CH 6 Phosphoenolpyruvate 2-Phosphoglycerate 4. Chymotrypsin: -0–CH,CH3 + H2O - RCOOH + HOCH,CH3 5. Pyruvate carboxylase: coo • co, • ATP + H,0 H-C-H . ADP + P, + 2H čoo CH, Pyruvate OxaleacetatePATHWAYS (12 pts). Complete the pathway below by writing the intermediate (I) name, pathway name (P) and enzyme (E) name. glucose 4. P alucose-1-P 3.1 ribose-5-P 1.P 2.P 5. E giytogen pyruvate alanine 6. I- HMG-CoA 7. I bile salts, steroid hormones 8.I ETC 9. Р 10. I and 11. I ATP 12. I (via substrate level phosphorylation) carbon dioxideHO. Hexanoic acid is a 6-carbon saturated fatty acid found in goat's milk. Hexanoic acid also contributes to the "barnyard" smell of goats. Fun fact: Hexanoic acid is also known as caproic acid. The name "caproic" is derived from the Latin word "caper", which means goat. What is the balanced equation for complete beta oxidation of hexanoyl-COA to acetyl-CoA shown below (ignore H20 and H+): O Hexanoyl-COA + 3COA + 3FAD + 3NAD+ -------> 3 acetyl-COA + 3 FADH2 +3 NADH O Hexanoyl-CoA + 2COA + 2FAD + 2NAD+ --> 3 acetyl-CoA + 2 FADH2 + 2 NADH O Hexanoyl-CoA + 1COA + 1FAD + 1NAD+ --> 2 acetyl-CoA + 1 FADH2 +1 NADH O Hexanoyl-COA + 6COA + 6FAD + 6NAD+ --------> 6 acetyl-CoA.+ 6 FADH2 + 6 NADH None of the above
- Step 2 of B-oxidation involves a reaction with chemistry characterized as a dehydration. B-Oxidation is shown below. H HO || || C-C-S – CoA FAD но R-CH2- C Acyl-CoA dehydrogenase H-C-C -S- CoA Acetyl-CoA Fatty acyl-CoA H FADH2 - CH2 - -c-S- CoA R- Thiolase Fatty acyl-CoA shortened by two carbons COA-SH H. он Successive cycles R-CH2-C-C- -C-S- CoA R– CH2 C=C-C-S-CoA H B-Ketoacyl-Co.A trans-A²Enoyl-CoA NADH + H* H,0 H H L-Hydroxyacyl-CoA dehydrogenase Enoyl-CoA hydratase R- CH,-c-c-C- S-CoA Но H NAD+ L-B-Hydroxyacyl-CoA True O FalseWhat is(are) the only active site(s) not used in the second round of fatty acid synthase? Select all that apply. Acetyl-CoA ACP Transacylase Beta-Ketoacyl- ACP Synthase Beta-Ketoacyl- ACP Dehydrase Palmitoyl thioesterase Malonyl-CoA ACP Transacylase Enoyl-ACP ReductaseA. What would happen in the Krebs cycle with the loss of activity of phosphoglycerate kinase? What would happen in glycolysis? 10. What happens to glycolysis with the addition of high amounts of citrate? What happens to ETS? 11. What happens in the Krebs cycle with a block in fumerase? 12.If an amino acid enters the Krebs cycle at the acetyl CoA entry point, how much more ATP is being made than if it enters at a keto-glutarate?
- All of the following are accurate contrasts for beta oxidation vs fatty acid synthesis except which of the following statements? Group of answer choices The hydroxylacyl group differs in stereochemistry between beta oxidation and biosynthesis CoA is the acyl carrier group in beta oxidation, acyl carrier protein is the carrier in biosynthesis The carbon unit resulting from beta oxidation is acetyl-CoA, the carbon unit for biosynthesis is malonyl-CoA FAD is an electron acceptor in beta oxidation, NADP+ is the electron acceptor in biosynthesisWhat is(are) the only active site(s) not used in the second round of fatty acid synthase? Select all that apply. Group of answer choices Acetyl-CoA ACP Transacylase Beta-Ketoacyl- ACP Synthase Beta-Ketoacyl- ACP Dehydrase Palmitoyl thioesterase Malonyl-CoA ACP Transacylase Enoyl-ACP ReductaseUsing the list of enzymes given below, provide all chemical structures and reactions for complete metabolism of the fatty acids 8:0, 18:145 and 12:247,10. It is unnecessary to repeat a reaction once it has been drawn out previously. Refer to the repeated reaction by group and number. Use the next pages if necessary and clearly identify which fatty acid is being metabolized.