Biomolecules PYQs

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

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: Choose the correct answer from the options given below :

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

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

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

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

Match List I with List II. Choose the option with all correct matches.

Histones are enriched with -

The protein portion of an enzyme is called :

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

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

Match List I with List II : 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 :

Given below are two statements: Statement I : A unit formed by the attachment of a base to 1' position of sugar is known as nucleoside. Statement II : When nucleoside is linked to phosphorous acid at 5'-position of sugar moiety, we get nucleotide. In the light of the above statements, choose the correct answer from the options given below:

Cellulose does not form blue colour with Iodine because

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 α type and two subunits of β type). In the light of the above statements, choose the correct 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) 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:

The RBC deficiency disease is deficiency disease of:

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. Choose the correct answer from the options given below.

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

Match the following: Choose the correct option from the following.

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

Identify the basic amino acid from the following.

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

Prosthetic groups differ from co-enzymes in that-

"Ramachandran plot" is used to confirm the structure of

Mad cow disease in cattle is caused by an organism which has :

Which of the following organic compounds is the main constituent of Lecithin?

The two functional groups characteristic of sugars are:

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

Which of the following are not polymeric?

Which of the following statements is not correct?

The correct corresponding order of names of four aldoses with configuration given below respectively, is:

A non-proteinaceous enzyme is

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

Which of the following describes the given graph correctly?

Which of the following biomolecules does have a phosphodiester bond?

Select the option which is not correct with respect to enzyme action:

Which one of the following is a non-reducing carbohydrate?

Transition state structure of the substrate formed during an enzymatic reaction is

A phosphoglyceride is always made up of

Macromolecule chitin is

The essential chemical components of many coenzymes are

Which one of the following biomolecules is correctly characterised?

Which one of the following pairs of chemical substances is correctly categorised?

For its activity, Carboxypeptidase requires:

Which of the following is not a fat soluble vitamin?

Which of the statements about "Denaturation" given below are correct? Statements: (a) Denaturation of proteins causes loss of secondary and tertiary structures of the protein. (b) Denaturation leads to the conversion of double strand of DNA into single strand. (c) Denaturation affects primary structure which gets distorted.

Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?

The figure given below shows the conversion of a substrate into product by an enzyme. In which one of the four options (1-4) the components of reaction labelled as A, B, C and D are identified correctly?

Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (a-e) make it useful as a storage material? a. Easily translocated b. Chemically non-reactive c. Easily digested by animals d. Osmotically inactive e. Synthesized during photosynthesis The useful properties are

Three groups of baby mice were used in a growth experiment. (a) Kept on complete diet (b) Fed basal diet without nutrient to be tested (c) Basal diet + carotene by feeding carrots. Identify curves a, b and c.

An organic substance bound to an enzyme and essential for its activity is called:

Nucleotide are building blocks of nucleic acids, nucleotide is a composite molecule formed by:

Which of the following is the simplest amino acid?

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these:

Which of the following statements regarding enzyme inhibition is correct?

The catalytic efficiency of two different enzymes can be compared by the: