AIIMS Zoology Biomolecules Class 11 Questions

Protein on reaction with which yields Ruhemann's purple?

Enzymes are of various types depending on their action. Hydrolases catalyses the hydrolysis of ester, ether, peptide, glycosidic, C⁻C, C⁻halide, P⁻N bonds etc. They are formed by dehydration and condensation. Hydrolases break up large molecules into smaller ones with the help of hydrogen and hydroxyl groups of water molecules. This phenomenon is called

Essential amino acids are those which are taken from food and not synthesized in the body whereas non-essential amino acids need not be supplied in the diet and are synthesized in the body. Glycine, serine and tyrosine are non-essential amino acids.

Assertion (A) A co-enzyme or metal ion that is very tightly bound to enzyme protein called prosthetic group. Reason (R) A complete, catalytically active enzyme together with its bound prosthetic group is called apoenzyme.

Select the option having all correctly matched pairs.

In a 50 gm living tissue, what would be the amount of water?

Which of the following elements is present in very less quantity in the body?

Assertion : Enzymes lower down the activation energy of the reactant molecule to make its transition into product easier. Reason : Enzymes are highly substrate specific catalysts.

Vitamin B₆ is also called

Which of the following sugars is not found in plants?

Which match is true?<br><br><table><tr><th></th><th>Vitamin deficiency disease</th><th>Vitamin</th><th>Source</th></tr><tr><td>(a)</td><td>Severe bleeding</td><td>Tocopherol</td><td>Milk, egg</td></tr><tr><td>(b)</td><td>Anaemia</td><td>Ascorbic acid</td><td>Lemon, orange</td></tr><tr><td>(c)</td><td>Night blindness</td><td>Retinol</td><td>Carrot, milk</td></tr><tr><td>(d)</td><td>Sterility</td><td>Calciferol</td><td>Milk, butter</td></tr></table>

An example of competitive inhibition of an enzyme is the inhibition of

Which of the following contain β-1, 4 linkage?

Which statement is true?

In which one of the following sets of three items each belong to the category mentioned against them?

The figure given below shows three velocity-substrate concentration curves for an enzyme reaction. What do the curves a, b, and c depict respectively?

The given graph shows the effect of substrate concentration on the rate of reaction of the enzyme green-gram-phosphatase. What does the graph indicate?

Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?

Continued consumption of a diet rich in butter, red meat and eggs for a long period may lead to:

An example of competitive inhibition of an enzyme is the inhibition of:

Assertion : Bats and whales are classified as mammals. Reason : Bats and whales have four-chambered heart.

Which of the following would not give Fehling's test?

Assertion : Living organisms are regarded as closed systems. Reason : Energy of living organisms cannot be lost or gained from the environment.

In RNA thiamine is replaced by:-