Biomolecules PYQ

Enzymes that catalyse the removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds, are known as :

Which of the following are not fatty acids? A. Glutamic acid B. Arachidonic acid C. Palmitic acid D. Lecithin E. Aspartic acid Choose the correct answer from the options given below :

Which of the following graphs depicts the effect of substrate concentration on velocity of enzyme catalysed reaction?

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 :

The cofactor of the enzyme carboxypeptidase is:

Ligases is a class of enzymes responsible for catalysing the linking together of two compounds. Which of the following bonds is not catalysed by it?

Match List-I with List-II. \begin{array}{|l|l|l|l|}\hline & List-I & & List-II \\\hline A. & Primary structure of protein & I. & Human haemoglobin \\\hline B. & Secondary structure of protein & II. & Disulphide bonds \\\hline C. & Tertiary structure of protein & III. & Polypeptide chain \\\hline D. & Quaternary structure of protein & IV. & Alpha helix and \beta sheet \\\hline\end{array} Choose the correct answer from the options given below :

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

Match List-I with List-II  Choose the correct answer from the options given below.

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

Which of the following is a nucleotide?

Cellulose does not form blue colour with Iodine because

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 :

Match List-I with List-II.  Choose the correct 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:

Inulin is a polymer of:

Malonate inhibits the growth of pathogenic bacteria by inhibiting the activity of:

Primary proteins are also called as polypeptides because :

In the enzyme which catalyses the breakdown of: $\mathrm{H}_2 \mathrm{O}_2 \rightarrow \mathrm{H}_2 \mathrm{O}+\mathrm{O}_2$ the prosthetic group is :

A dehydration reaction links two glucose molecules to produce maltose. If the formula for glucose is ${C}_{6}{H}_{12}{O}_{6}$ then what is the formula for maltose?

Given below are two statements: Statement I : Amino acids have a property of ionizable nature of $-\mathrm{NH}_2$ and $-\mathrm{COOH}$ groups, hence have different structures at different $\mathrm{pH}$. Statement II : Amino acids can exist as Zwitterionic form at acidic and basic $\mathrm{pH}$. In the light of the above statements, choose the most appropriate answer from the options given below:

Read the following statements on lipids and find out the 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) Gingelly oil has a lower melting point, and hence remains as oil in winter. (d) Lipids are generally insoluble in water but soluble in some organic solvents. (e) When a fatty acid is esterified with gIycerol, monoglycerides are formed. Choose the correct answer from the options given below:

Match List - I with List- II. <table class="pyq-table"><tbody><tr><td colspan="2" rowspan="1">Column-I</td><td colspan="2" rowspan="1">Column-II</td></tr><tr><td>(a)</td><td>Protein</td><td>(i)</td><td>$C=C$ double bonds</td></tr><tr><td>(b)</td><td>Unsaturated fatty acid</td><td>(ii)</td><td>Phosphodiester bonds</td></tr><tr><td>(c)</td><td>Nucleic acid</td><td>(iii)</td><td>Glycosidic bonds</td></tr><tr><td>(d)</td><td>Polysaccharide</td><td>(iv)</td><td>Peptide bonds</td></tr></tbody></table>Choose the correct answer from options given below.

Which of the following are not secondary metabolites in plants?