Biomolecules practice · Mixed difficulty

A nucleotide has three chemically distinct compounds. These are A, B and C
Choose the correct option for A, B and C

Identify the number of correct statements from the following w.r.t respiration as amphibolic pathway.

A. Fats would need to be broken down into glycerol and fatty acids first before entering the respiratory pathway.

B. The proteins would be degraded to individual amino acids and enter the respiratory pathway only through Krebs' cycle.

C. If fatty acids were to be respired, they would first be degraded to pyruvate and enter the respiratory pathway.

D. Glycerol would enter the respiratory pathway after being converted to PGAL.

If the total amount of adenine and thymine in a double-stranded DNA is 60%, then the amount of guanine in this DNA will be

Silk consists of

Ammonia is very toxic to brain cells. This is immediately trapped in brain by one of the following mechanisms.

Read the following statements carefully and select the appropriate option given below.

(i) Plant cell wall consists of cellulose, hemicellulose, pectins and proteins.

(ii) As there are 20 types of amino acids, a protein is a heteropolymer and not a homopolymer.

(iii) Amino acids are organic compounds containing an amino group and a basic group as substituents on the same carbon.

(iv) The long protein chain is also folded upon itself like a hollow woollen ball, giving rise to the tertiary structure.

(v) In a polysaccharide, the individual monosaccharides are linked by a glycosidic bond.

A fragment of DNA has 480 nucleotides out of which 110 are those of Adenine. The number of cytosine nucleotides is

Arrange the intermediary products formed during the process of digestion of proteins

I. Peptones

II. Amino acids

III. Polypeptides

IV. Proteins

V. Tripeptides

VI. Dipeptides

Carbohydrates, the most abundant biomolecules earth, are produced by

Select odd one w.r.t substances and their categories/functions.

Which bond is responsible of formation of polysaccharide?

Find the odd “Nitrogen base”

Identify the true statement from the below.

Fats in the body are formed when:

Which of the following polysaccharide is wrongly matched with its monomer?

Due to discovery of which of the following in 1980 the
evolution was termed as RNA world?

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:

Double sugar is

In all of the given carbon compounds heterocyclic rings can be found, except

Select the correct constituents of protein

All the chemical reactions occurring in living organisms are called

Amino acids the substituted methanes. Name the four substituent groups occupying the four valency positions

The inorganic compounds like sulphate, phosphate etc are found in?

Michaelis Menten constant (${K_m}$) is equal to:-

Biomolecules are constantly being changed into some other biomolecules and are made from ….

A competitive inhibitor of succinic dehydrogenase is

A bond formed between carboxyl group of one amino acid and amino group of adjacent amino acid, is called

Choose the odd one w.r.t homopolysaccharide.

Assertion (A) In the solutions of different pH, structure of
amino acids changes
Reason (R) It is because of the ionisable nature of 3/4 $N{H_2}$
and 3/4 $COOH$ groups

Name the heterocyclic compounds which are known as nitrogenous bases
Choose the most appropriate options