Biomolecules PYQs - Last 5 Years

Arrange the following elements in descending order of their contribution to percentage weight of the human body.
(a) Oxygen
(b) Carbon
(c) Hydrogen
(d) Nitrogen
Choose the correct answer from the options given below :

\(\text { Match List-I with List-II. }\)
$$ \begin{array}{|c|l|c|l|} \hline & \text { List-I } & & \text { List-II } \\ \hline \text { A. } & \text { Starch } & \text { I. } & \text { Fights infection } \\ \hline \text { B. } & \text { An...

The following reaction depicts the activity of a particular class of enzymes :
Identify the enzymes class ' $E$ ' from the following options :

\(\text { Match List I with List II : }\)


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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...

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...

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

Name the class of enzyme that usually catalyze the following reaction :
\(S-G+S^{\#} \rightarrow S+S^{\#}-G\)
Where, G $\rightarrow$ a group other than hydrogen
\(S \rightarrow \text { a substrate }\)
$$S^{\#} \rightarrow \text { another su...

Histones are enriched with -

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

Which one of the following statements refers to Reductionist Biology?

The protein portion of an enzyme is called:

Match List-I with List-II

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

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 :

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.

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Which of the following is a nucleotide?

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 brok...

The cofactor of the enzyme carboxypeptidase is:

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

Match List I with List II

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Match List I with List II:

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

Match List-I with List-II.

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Which of the following is not a secondary
metabolite?

Inulin is a polymer of :

Match List - I with List - II

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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 inhibi...

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, c...

Cellulose does not form blue colour with Iodine because

In the enzyme which catalyses the breakdown of:
H2O2 \(\to\) H2O + O2
the prosthetic group is :

Given below are two statements:
Statement I : Amino acids have a property of ionizable nature of \(-\)NH2 and \(-\)COOH groups, hence have different structures at different pH.
Statement-II : Amino acids can exist as Zwitterionic form at ac...

If DNA contained sulfur instead of phosphorus and proteins contained phosphorus instead of sulfur, what would have been the outcome of Hershey and Chase experiment?

Choose the incorrect enzymatic rection:

Which of the following pair represents free living nitrogen fixing aerobic bacteria?

Primary proteins are also called as polypeptides because :

Match List-I with List-II

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When a carrier protein facilitates the movement of two molecules across the membrane in same direction, it is called

Match List-I with List-II:

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

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, he...