The correct statement with regard to the secondary structure of DNA/RNA is
RNA possesses a single strand helix structure and contains thymine as one of the four bases
DNA possesses a double strand helix structure and contains thymine as one of the four bases
RNA possesses a double strand helix structure and contains uracil as one of the four bases
DNA possesses a single strand helix structure and contains uracil as one of the four bases
The correct statement about peptides and proteins is
In $\alpha$-helices, the polypeptide chain is twisted into a left-handed screw (helix) through intramolecular hydrogen bonds
Tertiary structure of proteins has two or more polypeptide subunits
Only the proteins having a quaternary structure are biologically active
In $\beta$-pleated sheet structures, peptide chains are held together by intermolecular hydrogen bonds
The amino acid that gives a red-blood colour on treating its sodium fusion extract with sodium nitroprusside is
serine
leucine
threonine
methionine
$ \text { Match the vitamins in List I with their sources in List II } $
$ \begin{array}{|l|l|l|l|} \hline & \text { List I } & & \text { List II } \\ \hline \text { A. } & \text { vitamin A } & \text { I. } & \text { meat } \\ \hline \text { B. } & \text { vitamin B }{ }_{12} & \text { II. } & \text { sunflower oil } \\ \hline \text { C. } & \text { vitamin E } & \text { III. } & \text { green leafy vegetables } \\ \hline \text { D } & \text { vitamin K } & \text { IV. } & \text { carrots } \\ \hline \end{array} $
Choose the correct answer from the options given below.
A-III, B-I, C-IV, D-II
A-II, B-III, C-IV, D-I
A-IV, B-I, C-II, D-III
A-IV, B-II, C-I, D-III
Sugar ' $X$ '
A. is found in honey
B. is a keto sugar
C. exists in $\alpha$ and $\beta$-anomeric forms.
D. Is laevorotatory.
' X ' is :
Match List-I with List-II.
| List - I (Name of Vitamin) |
List - II (Deficiency disease) |
||
|---|---|---|---|
| A | Vitamin $B_{12}$ | I | Cheilosis |
| B | Vitamin $D$ | II | Convulsions |
| C | Vitamin $B_{2}$ | III | Rickets |
| D | Vitamin $B_{5}$ | IV | Pernicious anaemia |
Choose the correct answer from the options given below:
Given below are two statements :
Statement I : Glycogen is similar to amylose in its structure.
Statement II : Glycogen is found in yeast and fungi also.
In the light of the above statements, choose the correct answer from the options given below :
The reagents with which glucose does not react to give the corresponding tests/products are
A. Tollen's reagent
B. Schiff's reagent
C. HCN
D. $\mathrm{NH}_2 \mathrm{OH}$
E. $\mathrm{NaHSO}_3$
Choose the correct options from the given below:
Fehling's solution 'A' is
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:
The incorrect statement about denaturation of proteins is :
The incorrect statement regarding enzymes is
respectively, is
and $\alpha $-$D$ glucopyranose
and $\beta $-$D$ fructofuranose
and $\alpha $-$D$ fructofuranose
and $\beta $-$D$ fructopyranose
(1) Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(2) Denaturation leads to the conversion of double strand of DND into single strand.
(3) Denaturation affects primary structure which gets distorted.
are respectively
