Biomolecules

Which of the following describes the given graph correctly? (Graph shows reaction-coordinate / potential-energy profile with activation energies labelled 'A' and 'B'.)

A typical fat molecule is made up of:

The two polypeptides of human insulin are linked together by:

Which of the following is the least likely to be involved in stabilizing the three-dimensional folding of most proteins?

A non – proteinaceous enzyme is

Which one of the following statements is wrong?

Which one of the following statements is correct, with reference to enzymes?

Which of the following are not polymeric?

The two functional groups characteristic of sugars are

Prosthetic groups differ from co-enzymes in that :-

Concanavalin A is

Purines found both in DNA and RNA are

"Ramachandran plot" is used to confirm the structure of :-

Consider the following statement : (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytic active enzyme with its bound prosthetic group is called apoenzyme. Select the correct option.

Which one of the following is the most abundant protein in the animals?

Identify the substances having glycosidic bond and peptide bond, respectively in their structure:

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:

Match the following: (a) Inhibitor of catalytic activity (b) Possess peptide bonds (c) Cell wall material in fungi (d) Secondary metabolite (i) Ricin (ii) Malonate (iii) Chitin (iv) Collagen Choose the correct option from the following:

Identify the basic amino acid from the following

Match list I with list II. List I: (a) Protein; (b) Unsaturated fatty acid; (c) Nucleic acid; (d) Polysaccharide List II: (i) C=C double bonds; (ii) Phosphodiester bonds; (iii) Glycosidic bonds; (iv) Peptide bonds

Following are the statements with reference to 'lipids'. (a) Lipids having only single bonds are called unsaturated fatty acids. (b) Lecithin is a phospholipid. (c) Trihydroxy propane is glycerol. (d) Palmitic acid has 20 carbon atoms including carboxyl carbon. (e) Arachidonic acid has 16 carbon atoms. Choose the correct answer from the options given below

Identify the incorrect pair.

Which of the following are not secondary metabolites in plants?

Exoskeleton of arthropods is composed of:

Read the following statements on lipids and find out correct set of statements: (a) Lecithin found in the plasma membrane is a glycolipid (b) Saturated fatty acids possess one or more C=C bonds (c) Gingely oil has lower melting point, hence remains as oil in winter (d) Lipids are generally insoluble in water but soluble in some organic solvents (e) When fatty acid is esterified with glycerol, monoglycerides are formed. Choose the correct answer from the options given below

A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is C6H12O6 then what is the formula for maltose?

Match List I with List II. Choose the correct answer from the options given below: List I: (a) Glycogen (b) Globulin (c) Steroids (d) Thrombin List II: (i) Hormone (ii) Biocatalyst (iii) Antibody (iv) Storage product

Match List-I with List-II. List-I: (A) Terpenoides (B) Lectins (C) Alkaloids (D) Toxins List-II: (I) Codeine (II) Diterpenes (III) Ricin (IV) Concanavalin A Choose the correct answer from the options given below:

Cellulose does not form blue colour with Iodine because

Which of the following is not a secondary metabolite?

Match List-I with List-II. List-I: (A) Protein (B) Unsaturated fatty acid (C) Nucleic acid (D) Polysaccharide List-II: (I) C = C double bonds (II) Phosphodiester bond (III) Glycosidic bonds (IV) Peptide bonds Choose the correct answer from the options given below:

Inulin is a polymer of:

Given below are two statements: Statement I: RuBisCO is the most abundant enzyme in the world. Statement II: Photorespiration does not occur in C4 plants. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid (N-terminal) Statement II: Adult human haemoglobin, consists of 4 subunits (two subunits of alpha type and two subunits of beta type.) In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements: Statement I: Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat. Statement II: When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor. In the light of the above statements, choose the correct answer from the options given below:

Melonate inhibits the growth of pathogenic bacteria by inhibiting the activity of

Inhibition of Succinic dehydrogenase enzyme by malonate is a classical example of

Match list I with list II. List I: A. GLUT-4; B. Insulin; C. Trypsin; D. Collagen List II: I. Hormone; II. Enzyme; III. Intercellular ground substance; IV. Enables glucose transport into cells Choose the correct answer from the options given below.

Regarding catalytic cycle of an enzyme action, select the correct sequential steps: A. Substrate enzyme complex formation. B. Free enzyme ready to bind with another substrate. C. Release of products. D. Chemical bonds of the substrate broken. E. Substrate binding to active site. Choose the correct answer from the options given below:

Lecithin, a small molecular weight organic compound found in living tissues, is an example of

The cofactor of the enzyme carboxypeptidase is

Match List I with List II: List I: A. Lipase; B. Nuclease; C. Protease; D. Amylase List II: I. Peptide bond; II. Ester bond; III. Glycosidic bond; IV. Phosphodiester bond Choose the correct answer from the options given below:

The protein portion of an enzyme is called:

Which one of the following enzymes contains ‘Haem’ as the prosthetic group?

Match List-I with List-II. List-I: A. Adenosine; B. Adenylic acid; C. Adenine; D. Alanine List-II: I. Nitrogen base; II. Nucleotide; III. Nucleoside; IV. Amino acid Choose the option with all correct matches.

Name the class of enzyme that usually catalyze the following reaction: S−G + S# → S + S#−G Where, G → a group other than hydrogen; S → a substrate; S# → another substrate

Identify the correct statements about biomolecules. A. Lipids are generally water soluble. B. Proteins are polypeptides. C. Polysaccharides are long chains of sugars. D. Adenine and guanine are substituted pyrimidines. E. Almost all enzymes are proteins. Choose the correct answer from the options given below:

Which of the following statements are correct regarding amino acids? A. They are substituted methanes. B. Serine is an aromatic amino acid. C. Valine is a neutral amino acid. D. Lysine is an acidic amino acid. Choose the correct answer from the options given below:

Match List I with List II : List I A. Trypsin B. Morphine C. Concanavalin A D. Collagen List II I. Intercellular ground substance II. Lectin III. Enzyme IV. Alkaloid Choose the correct answer from the options given below :

Alpha-helix is found in which level of protein structure?

The following reaction depicts the activity of a particular class of enzymes : [Figure: X and Y are substituents on a C-C bond. Substrate (X-C-C-Y) is converted by enzyme E to products X-Y and C=C]. Identify the enzymes class 'E' from the following options :

Match List-I with List-II: List-I A. Starch B. Antibody C. Concanavalin A D. Glut-4 List-II I. Fights infection II. Energy storage III. Glucose transport IV. Lectin Choose the correct answer from the options given below:

Arrange the following elements in descending order of their contribution to the percentage weight of the human body: (a) Oxygen, (b) Carbon, (c) Hydrogen, (d) Nitrogen.