Which of the following molecules do NOT contribute atoms to purine synthesis? a. Glutamine b. Aspartate c. Glycine d. Lysine

Q: What would happen if there was no methionine in the cell?

A: Amino acids are organic molecules that are the basic unit of proteins. Methionine is an essential…

Q: Thymidine is the result of A Removal of the ribose-5'-phosphate group from thymidylic acid B Removal…

A: Answer :  a.  Removal of the ribose-5'-phosphate group from thymidylic acid.

Q: What kind of biological function would each of the follow- ing proteins perform? (a) Human growth…

A: A protein is an incredibly complex natural molecule made up of amino acid residues linked by peptide…

Q: Aspartate and phenyalanine become apartate and isoleucine

A:

Q: Describe how free purines are converted back to nucleotides.

A: Purines is a heterocyclic aromatic organic compounds that consists of two rings. Nucleotides are…

Q: Which one of the following statements about the molecular structure of phosphatidylcholine is TRUE?…

A: Phospholipids are a class of lipid molecule that is the most important component of all cell…

Q: Which derivative of folate is a reactant in the conversion of (a) glycine into serine? (b)…

A: Introduction:   Proteins are biomolecules that consist of one or more long chains of amino acid…

Q: Which molecules did you identify as possible targets for a drug to treat Alzheimer's disease, and…

A: it is a degenerative brain disorder it usually starts in middle age to old age results in…

Q: which of the following process do not contribute to purine nucleotide biosynthesis? a) synthesis…

A: Biosynthesis of nucleotides occur in two ways - de novo pathway and salvage pathway. In the de novo…

Q: Amphipathic molecules mean that they have both :polar and nonpolar parts, for example

A: An amphipathic molecule could be a molecule that has polar and non-polar elements.

Q: What is the most significant chemical difference between triacylglycerols and glycerophospholipids…

A: Triglycerides: Triglycerides are simple lipid molecules made up of glycerol backbone attached with…

Q: Discuss the Pharmacokinetics of morphine sulfate using the correct sequence you  have chosen in…

A: Morphine is a drug that targets a specific type of receptor that affects multiple processes. It does…

Q: synthesis of sphingolipid

A: There are various different kinds of sphingolipid that are manifested by different structures as…

Q: What might occur in a cell lacking steroids in its membrane?

A: Steroids are lipid derivatives that are hydrophobic and main constituent of cell membrane. Their…

Q: The two reactions that convert glutamate to ornithine are, first, a of the y-carboxylate group of…

A: Ornithine is a proteogenic amino acid that plays a role in the urea cycle. It is mainly formed from…

Q: Draw the following: A. a phosphatidylcholine with two oleic acid as the fatty acids B. a…

A: Lipids are structurally diverse biomolecules that have two things in common: low solubility in water…

Q: Refer to the following table below to answer the succeeding questions: Amino acid pK, pK2 pK3…

A: The charge on the amino acid depends on the pKa value of the ionizing groups in the amino acid. The…

Q: compare between phenylalanine and tyrosine

A: Phenylalanine and tyrosine are amino acids that contain a benzene ring side chain. Amino acids are…

Q: Oxidation of the aldehyde group of a sugar produces an____________________ acid.

A: Carbohydrates are the biomolecules that are polyhydroxy aldehyde and ketones containing carbon,…

Q: O isoleucine and leucine O phenylalanine and lysine O aspartate and leucine O leucine and lysine

A: There are 20 standard amino acids. These amino acids are grouped according to their end product that…

Q: Why are proteoglycans like airbags?

A: Proteoglycans are compound consisting of a protein, which is bonded to mucopolysaccharide groups.…

Q: A mutation that changes an alanine residue in a protein to an isoleucine leads to a loss of…

A: The protein folding property of protein makes a major impact on the functioning of amino acids. The…

Q: What is the role of tyrosine in prostaglandin synthesis? Tyrosine provides the proton to the double…

A: Prostaglandins are mostly produced from Arachidonic acids( a C20 poly-unsaturated fatty acids) in…

Q: Phospholipase responsible for the tissue damage after spider bite? a.A1 b.A2 c.D d.C

A: Phospholipase (PLA) is a lipolytic enzymes which cleaves the phospholipid substrates at specific…

Q: Tetracycline is used to treat infections caused by bacteria including pneumonia and other…

A: Antibiotics are molecules that help in killing disease causing agents or micro organisms.…

Q: Why can’t humans degrade purine rings?

A: Purine and pyrimidine degrade almost in the same way.

Q: Write two reactions to represent the formation of the two dipeptides that form when leucine and…

A: A peptide is a sequence of amino acids involved in a condensation reaction where the carboxyterminal…

Q: What Are Steroids, and What Are Their CellularFunctions?

A: Introduction: Steroids are biologically active organic compounds with four rings arranged in a…

Q: Which of the following statements is NOT TRUE about tyrosine? O It is an essential amino acid. O It…

A: All living organisms are made up of hundreds of amino acids. These are the polymers that synthesize…

Q: What reaction occurs between catalase and hydroxylamine?

A: Enzyme: It is a biocatalyst that increases the rate of chemical reaction without itself going any…

Q: The bases of purine nucleotides are degraded to_________________.

A: DNA stands for deoxyribonucleic acid. It is the genetic material of the organisms that transfer from…

Q: Dopamine, norepinephrine, and epinephrine are all derivedfrom the amino acid…

A: Dopamine, norepinephrine, and epinephrine are all derivedfrom the amino acid riboflavin. It is false…

Q: What are steroids? What are some examples of steroids with a biological function?

A: Lipids are compounds that soluble in organic solvents such as chloroform and ether and insoluble in…

Q: Which of the following is NOT a steroid molecule?

A: Testosterone is a primary sex hormone and anabolic steroid in males. Estrogen is one of the sex…

Q: Which one of the following is NOT a ligand? A. Glucagon  B. Bacterial protein C. Air

A: Ligand a substance that binds with the specific receptor and produce a signal to serve a biological…

Q: How Do Cells Synthesize Purines?

A: Purines : Purines are one of the most common chemical compounds on the planet. There are two kinds…

Q: SAM is a donor of _____________ groups in the synthesis of some phospholipid molecules.

A: Lipids are mainly composed of hydrocarbons. Fats, fatty acids, steroids are few examples of lipid.…

Q: What is the function of sphingomyelin?

A: it is a type of phospholipid

Q: Branched-chain amino acids are important in metabolic processes for all of the following reasons…

A: Amino acids are generally used to make protein and poly peptide chain

Q: mutations occur in what molecule

A: The mutation is one of the significant mechanism which directly affects the survival of the organism…

Q: The immediate donors of the nitrogen atoms of urea are: a. Aspartate and glutamate b. Glutamate and…

A: Urea cycle is a cyclic pathway related to the synthesis of urea, one nitrogen is derived from free…

Q: The followings are the biological roles of cholesterol EXCEPT ____.   a. as a component of…

A: Cholesterol is a lipid, it plays a major role in cellular function.it acts as a precursor for the…

Q: Which of the following amino acids is polar in nature? A. Aspartic acid B. Alanine C. Proline D.…

A: On the basis of polarity amino acid can be divided into polar and no npolar amino acids.

Q: Why does the number of chiral carbon atoms in glucose increase when it mutarotates? You may include…

A: Introduction: The term “mutarotation” refers to the observed change in the optical rotation of the…

Q: Which of the following is not a use for cellulose?(a) lumber for building(b) fodder for cattle(c)…

A: Cellulose is a polysaccharide of glucose that is present in the plant's cell wall and is…

Q: What are derived from the treatment of triacylglycerols with strong bases? A. salts of…

A: Triacylglycerols, also known as triglycerides. They are the simplest lipids formed by fatty acids.…

Q: Why can aldoses and ketoses both behave as reducing sugars?

A: Reducing sugars are saccharides that contain free aldehyde or ketone groups that react with reducing…

Metabolic pathways

Metabolism is defined as the group of life-supporting, enzyme-mediated chemical reactions in organisms. A metabolic pathway is a set of these chemical reactions that involve anabolism (synthesis of complex biomolecules) and catabolism (breakdown of biomolecules into small molecules) that occur inside a cell. Metabolites are the reacting substances, products, and intermediate substances of an enzymatic process that are altered by a series of chemical events catalyzed by enzymes.