Sucrose on hydrolysis gives :
The compound that does not reduce Fehling solution is :
The structure that represents the peptide chain is :-
The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called :-
Lipase
Zymase
Pepsin
Maltase
Enzymes are made up of : -
Edible proteins.
Proteins with specific structure.
Nitrogen containing carbohydrates.
Carbohydrates.
Which is not a true statement: -
α-carbon of α-amino acid is asymmetric except glycine.
Some protein of human body are found in L-form
Human body can synthesize all proteins they need
At pH = 7 both amino and carboxylic groups exist in ionized form
Among the following reducing sugar is : -
Galactose
Gluconic acid
β-methyl galactoside
Sucrose
Compound that gives positive Fehling solution test is :
Which is the correct statement among the following?
Reducing sugars are -
Carbohydrates that reduce Fehling’s solution and Tollen’s reagent.
Carbohydrates that reduce only Tollen’s reagent.
Carbohydrates that reduce only Fehling’s solution .
Carbohydrates that reduce HI
The term glycosidic linkage means -
Two monosaccharide units bonded by an oxygen atom.
Two monosaccharide units bonded by a sulphur atom.
Two peptide units bonded by an oxygen atom.
Two peptide units bonded by an hydrogen atom.
Secondary structure of protein is represented by :
α-helix structure
β-pleated sheet structure
Both 1 and 2
None of the above
α-helix structure of proteins is stabilized by -
H-bonds formed between the −SH and C=O group.
H-bonds formed between the −NH and C=O group.
Ionic bonds formed between the −SH and C=O group.
Ionic formed between the −NH and C=O group.
Amino acids exhibit amphoteric behavior as -
They can act both as an acid and as a base.
They can act only as an acid but not as a base.
They can act only as a base but not an acid.
None of the above.
The denaturation of proteins indicates -
The primary structure of a protein is destroyed and the enzyme loses it's activity.
The primary structure of a protein is destroyed and the enzyme enhances it's activity.
The secondary and tertiary structures of a protein are destroyed and the enzyme loses it's activity.
The secondary and tertiary structures of a protein are destroyed and the enzyme enhances it's activity.
A nucleoside is different from a nucleotide as-
Nucleoside = Sugar, Protein ; Nucleotide = Sugar, Protein, Phosphoric acid
Nucleoside = Fatty acid, Base ;Nucleotide = Fatty acid, Base, Phosphoric acid
Nucleoside = Sugar, Base ; Nucleotide = Sugar, Base, Phosphoric acid
Nucleoside = Sugar, Base, Phosphoric acid ; Nucleotide = Sugar, Base
A: Assertion: The two strands of DNA are complementary to each other.
R: Reason: Adenine specifically forms hydrogen bonds with guanine whereas cytosine forms hydrogen bonds with thymine.
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Assertion is correct but Reason is incorrect
Both Assertion and Reason are incorrect
Monosaccharides are:
Carbohydrates that can't be hydrolysed further to give simpler units of polyhydroxy aldehyde or ketone.
Classified on the bases of number of carbon atoms and the functional group present in them.
The monomers of carbohydrates.
All of the above.
Consider the following statements about proteins:
a. Peptide linkage is also known as amide linkage (-CO-NH-)
b. Simply the sequence of amino acids in a polypeptide chain is the primary structure of a protein.
c. During denaturation secondary and tertiary structures are destroyed but the primary structure remains intact.
d. In protein, hydrogen bonds are not disturbed if the protein is subjected to physical change or any chemical change.
The correct statements are-
a, d
a, d, c
a, b, c
b, c, d
Consider the following statements.
a. In fibrous protein, polypeptide chains run parallel and are held together by hydrogen and disulphide bonds.
b. Globular protein is formed when polypeptides coil around to give a spherical shape.
c. Globular proteins are insoluble in water but fibrous proteins are soluble in water.
d. Fibrous proteins and globular proteins examples are keratin and albumins respectively.
The incorrect statement is
d
c
b
a
a. Proteins are synthesized by various RNA molecules in the cell and commands for protein synthesis are present in DNA.
b. RNA contains β-D-ribose and DNA contains β-D-2-deoxyribose.
c. RNA contains uracil and DNA contains thymine.
d. RNA molecules are of three types, that is, messenger RNA, ribosomal RNA, and transfer RNA
The incorrect statement(s) are :
a, b, d
a, b, c, d
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