Trypsin catalyzes the cleavage of: a) all peptide bonds b)  peptide bonds after Lys or Arg   c) peptide bonds before Lys or Arg  d)  peptide bonds after Met Papain catalyzes the cleavage of: a) all peptide bonds b)  peptide bonds after Lys or Arg   c) peptide bonds before Lys or Arg  d)  peptide bonds after Met The molecule which binds to an enzyme and undergoes chemical reaction is called a: a)  substrate   b)  cofactor   c)  coenzyme  d)  prosthetic group A metal ion which binds to an enzyme and assists it in catalysis is called: a) substrate   b)  cofactor   c)  coenzyme  d)  prosthetic group Proteases are a subclass of which larger class? A)  isomerases   b)  oxidoreductases   c)  lyases  d)  hydrolases

Q: Insulin, a biological macromolecule (a protein), is a polymer produced by the beta cells of the…

A: Insulin is a hormone that is originally produced by beta cells of the pancreas. The hormone is…

Q: 9. Which of the following two enzymes is secreted from E. coli cells into the surrounding…

A: Enzyme is secreted from E coli cells into the surround environments is :- Beta-lactamases ar…

Q: 17.) In the left graph below, the dashed line (- ---) represents what? В) Km A) Vmax C) equilibrium…

A: These are the part of enzyme kinetics, the enzyme increases the rate of reaction by lowering the…

Q: What type of reaction does Ribulose-5-phosphate isomerase catalyze? A) isomerization B) not enough…

A: Ribulose 5-phosphate is a substrate for two enzymes includes 1) ribulose 5 phosphate epimerase…

Q: Which of the following amino acids has a hydrophobic R-group and would tend to be found on the…

A: Introduction:  Amino acids are molecules that contain an amine group, carboxylic acid group, and a…

Q: amino acids are covalently linked to tRNAs via what  a) phosphodiester bond  b) premature…

A: Protein synthesis is governed by the genes which are present on the chromosomes. The genes are first…

Q: 7. All amino acids have a chiral a-carbon EXCEPT A) Proline B) Alanine C) Glycine D) Tryptophan 8.…

A: Since you have posted multiple MCQ questions, we will provide the solution only to the first three…

Q: Which of the following amino acid types is mostly likely to be hydroxylated in a posttranslation…

A: Hydroxylation is defined as a process of oxidation reaction where the carbon-hydrogen bond in the…

Q: Which amino acid is most likely to have a net positive charge at a pH of 7.4? A) Histidine B)…

A: As an amino acid (AA) is introduced into a polypeptide chain, amino and carboxyl group charges…

Q: In the peptide Ala – Gly – Val – Phe – Tyr, a carboxylate (-COO-) group would bound in which amino…

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Q: The dominant motif found in hemoglobin and myoglobin is: a) twisted beta sheet b)  beta barrel  c)…

A: 1)The dominant motif found in hemoglobin and myoglobin is (b) beta barrel.2)myoglobin consists of (d…

Q: 16

A: What is true of enzymes? Enzymes are proteins that act as biological catalysts and act on substrates…

Q: 23. Which is not a function of proteins: a) catalyzing reactions b) structural properties such as…

A: Option (c) is the answer, as it is not a function of protein.

Q: cleoside triphosphates ...   a)  are synthesized from nucleoside monophosphates using the energy…

A: Nucleoside triphosphates are flexible molecules that can be functionalized in a variety of ways. The…

Q: A cytokine/growth factor that induces inflammation and promotes cell death. a) Cdk1 Ob) TNF O c)…

A: Tumor necrosis factor (TNF) is a cytokine that plays a critical role in the inflammatory response.…

Q: The biochemical roles of lipids are A) short-term energy storage, major component of muscle, and…

A: A lipid is a large biomolecule that can only be dissolved in nonpolar solvents and forms a distinct…

Q: The side chain of asparagine contains: OA) a hydroxyl group OB) an amine group OC) a carboxyl group…

A: Proteins are composed of amino acids, which are bound together by peptide linkage. Amino acids…

Q: Which of the following is true as it relates to the phosphorylation of enzymes?   a)…

A: Enzymes are biocatalyst that means they increase the rate of reaction by lowering the activation…

Q: The difference between cholesterol molecule and the hopanoid molecule in bacteria is that the…

A: To distinguish between cholesterol and hopanoids in bacteria based on their characteristics and…

Q: Proteins are sometimes classified as being globular proteins or fibrous proteins based on their…

A: The proteins that have long and narrow shape with structural role can be defined as fibrous proteins…

Q: Of the following amino acids, which 3 are most likely to be found on surface of a single protein.…

A: Proteins are the ultimate products of the genes. DNA is transcribed into m RNA and this is…

Q: Which of the following anticodons could be charged with Asparagine (Asn)? Question 23 options:…

A: An anticodon is a trinucleotide sequence complementary to that of a corresponding codon is a…

Q: This amino acid is either: (note that the non-ionized form is shown) a) Asp or Glu b) Lys or Arg…

A: An amino acid consists of α-amino group,α-carboxyl group, and R-group which are attached to a single…

Q: What term best describes the isomeric relationship between alpha-D- glucopyranose and…

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Q: 1. A) Draw a guanylate nucleotide and label the three main structural features B) Does this contain…

A: A) Drawing a Guanylate Nucleotide and Labeling Features A guanylate nucleotide consists of three…

Q: Deduce the amino acid sequence of a polypeptide from the following: 1. Acid hydrolysis gives Ala2,…

A: Deducing the amino acid sequence of a polypeptide from the analysis of peptide fragments generated…

Q: What amino acids are most likely to be found in the core of a water-soluble globular protein? a)…

A: Amino acids are biomolecules that have an amino group, a carboxyl group and a side group linked to…

Q: Which of the following describes a purpose for the function of phosphoglucoisomerase? a) allows for…

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Q: O A) H₂N H3N² B) D) H3N H₂N -CH-COO™ CH₂ CH₂ S CH3 -CH-COO CH₂ CH₂ CIO -o -CH-COO CH₂ OH -CH-COO CH₂…

A: Organic substances known as amino acids are the foundation of proteins and are important to many…

Q: n PLP dependent enzymes, what amino acid is initially bound to PLP in the PLP-Schiff base state? a)…

A:

Q: Which of the following peptides would reach the positive electrode first if placed in an…

A: in a polyacrylamide gel electrophoresis, proteins are loaded in a vertical gel so that they can be…

Q: The cofactor shown below: is an oxidizing agent is a reducing agent is a carrier of acyl groups is…

A: The given structure is of the FAD molecule.  FAD = Flavin adenine dinucleotide.

Q: SDS coats proteins with a: A) Positive Charge B) Negative Charge

A: SDS - Sodium dodecyl sulfate - It is a kind of surfactant protein. This technique is used to…

Proteins

We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.  

Protein Expression

The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.