2021
AP-EAPCET
MCQ
AP EAPCET 2021 - 20th August Evening Shift
The human body does not produce
A.
enzymes
B.
DNA
C.
vitamines
D.
hormones
2021
AP-EAPCET
MCQ
AP EAPCET 2021 - 20th August Morning Shift
Vitamin-B$_1$ is
A.
riboflavin
B.
cobalamine
C.
thiamine
D.
pyridoxine
2021
AP-EAPCET
MCQ
AP EAPCET 2021 - 19th August Evening Shift
Assertion (A) An optically active amino acid can exist in three forms depending on the pH of the solution.
Reason (R) Amino acids contain both acidic and basic groups, they exist as Zwitter ion in aq. medium, anionic form in acidic medium and cationic form in basic medium.
A.
A and R are correct and R is the correct explanation for A.
B.
A and R are correct but R is not the correct explanation for A.
C.
A is correct but R is incorrect.
D.
A is incorrect but R is correct.
2021
AP-EAPCET
MCQ
AP EAPCET 2021 - 19th August Morning Shift
Identify the product of the following reaction.
A.
Fructose
B.
Glucose
C.
Lactose
D.
Maltose
2021
AP-EAPCET
MCQ
AP EAPCET 2021 - 19th August Morning Shift
During the action of enzyme ‘zymase’ glucose is converted into .............., with the liberation of carbon dioxide gas.
A.
phenol
B.
ethanol
C.
methanol
D.
isopropyl alcohol
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 6th September Evening Slot
Which one of the following statements is not
true?
A.
Lactose contains $\alpha $-glycosidic linkage
between C1 of galactose and C4 of glucose
B.
Lactose is a reducing sugar and it gives
Fehling’s test
C.
On acid hydrolysis, lactose gives one
molecule of D(+)-glucose and one molecule
of D(+)-galactose
D.
Lactose (C11H22O11) is a disaccharide and it
contains 8 hydroxyl groups
Lactose contains $\beta $-glycosidic linkage between C1
of galactose and C4
of glucose.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 5th September Morning Slot
Which of the following is not an essential
amino acid :
A.
Valine
B.
Leucine
C.
Lysine
D.
Tyrosine
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 4th September Morning Slot
Which of the following will react with CHCl3 +
alc. KOH?
A.
Adenine and thymine
B.
Thymine and proline
C.
Adenine and lysine
D.
Adenine and proline
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 4th September Morning Slot
What are the functional groups present in the
structure of maltose?
A.
One acetal and one ketal
B.
One ketal and one hemiketal
C.
Two acetals
D.
One acetal and one hemiacetal
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 2nd September Evening Slot
The correct observation in the following
reactions is :
A.
Formation of blue colour
B.
Formation of violet colour
C.
Formation of red colour
D.
Gives no colour
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 2nd September Morning Slot
Consider the following rections:
'x', 'y' and 'z' in these reactions are respectively.
'x', 'y' and 'z' in these reactions are respectively.
A.
5, 6, & 5
B.
4, 5 & 5
C.
4, 6 & 5
D.
5, 4 & 5
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 8th January Evening Slot
Two monomers in maltose are :
A.
$\alpha $-D-glucose and $\alpha $-D-galactose
B.
$\alpha $-D-glucose and $\alpha $-D-Fructose
C.
$\alpha $-D-glucose and $\alpha $-D-glucose
D.
$\alpha $-D-glucose and $\beta $-D-glucose
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 8th January Morning Slot
Which of the following statement is not true for glucose?
A.
Glucose gives Schiff's test for aldehyde
B.
Glucosse reacts with hydroxylamine to form oxime
C.
The pentaacetate of glucose does not react with hydroxylamine to give oxime
D.
Glucose exists in two crystalline forms $\alpha $ and $\beta $
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 7th January Evening Slot
Which of the following statements is correct ?
A.
Gluconic acid can from cyclic (acteal/hemiacetal) structure
B.
Gluconic acid is a partial oxidation product of glucose
C.
Gluconic acid is obtained by oxidation of glucose with (HNO3)
D.
Gluconic acid is a dicarboxylic acid.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 7th January Morning Slot
Match the following :
(i) Riboflavin (a) Beriberi
(ii) Thiamine (b) Scurvy
(iii) Pyridoxine (c) Cheliosis
(iv) Ascorbic acid (d) Convulsions
(i) Riboflavin (a) Beriberi
(ii) Thiamine (b) Scurvy
(iii) Pyridoxine (c) Cheliosis
(iv) Ascorbic acid (d) Convulsions
A.
(i)-(c), (ii)-(d), (iii)-(a), (iv)-(b)
B.
(i)-(d), (ii)-(b), (iii)-(a), (iv)-(c)
C.
(i)-c, (ii)-(a), (iii)-(d), (iv)-(b)
D.
(i)-(a), (ii)-(d), (iii)-(c), (iv)-(b)
2020
JEE Mains
Numerical
JEE Main 2020 (Online) 5th September Evening Slot
The number of chiral carbons present in
sucrose is _____.
Correct Answer: 9
Explanation:
Total number of chiral carbon in sucrose = 9
2020
JEE Mains
Numerical
JEE Main 2020 (Online) 5th September Morning Slot
The number of chiral carbon(s) present in
peptide, Ile-Arg-Pro, is _____.
peptide, Ile-Arg-Pro, is _____.
Correct Answer: 4
Explanation:
The amino acids present in the given tripeptide
I$l$e–Arg–Pro are isoleucine, arginine and proline.
Number of chiral carbons present in the given tripeptide is 4.
Number of chiral carbons present in the given tripeptide is 4.
2020
JEE Mains
Numerical
JEE Main 2020 (Online) 4th September Evening Slot
The number of chiral centres present in
threonine is ________.
Correct Answer: 2
Explanation:
The structure of threonine is
No. of chiral centres present in it = 2
No. of chiral centres present in it = 2
2020
JEE Mains
Numerical
JEE Main 2020 (Online) 3rd September Evening Slot
The number of 
groups present in a tripeptide Asp–Glu–Lys is ____.
groups present in a tripeptide Asp–Glu–Lys is ____.
Correct Answer: 5
Explanation:
Structure of Tripeptide Asp – Glu – Lys
2020
JEE Advanced
Numerical
JEE Advanced 2020 Paper 2 Offline
The structure of a peptide is given below.
If the absolute values of the net charge of the peptide at $\mathrm{pH}$ $=2$, $\mathrm{pH}=6$, and $\mathrm{pH}=11$ are $\left|Z_1\right|,\left|Z_2\right|$, and $\left|Z_3\right|$, respectively, then what is $\left|Z_1\right|+\left|Z_2\right|+\left|Z_3\right|$?
If the absolute values of the net charge of the peptide at $\mathrm{pH}$ $=2$, $\mathrm{pH}=6$, and $\mathrm{pH}=11$ are $\left|Z_1\right|,\left|Z_2\right|$, and $\left|Z_3\right|$, respectively, then what is $\left|Z_1\right|+\left|Z_2\right|+\left|Z_3\right|$?
Correct Answer: 5
Explanation:
At pH = 2,
There are two $-$NH2 group, and + 1 charge on each group because all amino groups exist in the form of $-$NH$_3^ \oplus $.
Therefore, |Z1| = 2.
At pH = 6,
NH2 of lysine (+ 1) (pH = 9.47) and COOH ($-$1) of glutamic (pH = 3.08) acid, so because of dipolar ion exists, therefore |Z2| = 0.
At pH = 11,
COOH of glutamic acid has ($-$1), COOH of lysine ($-$1) and OH of phenol ($-$1).
Therefore, |Z3| = |$-$3| = 3 (All COOH and OH exist in the form of $-$COO$-$ and $-$O$-$).
$ \therefore $ |Z1| + |Z2| + |Z3| = 2 + 0 + 3 = 5
There are two $-$NH2 group, and + 1 charge on each group because all amino groups exist in the form of $-$NH$_3^ \oplus $.
Therefore, |Z1| = 2.
At pH = 6,
NH2 of lysine (+ 1) (pH = 9.47) and COOH ($-$1) of glutamic (pH = 3.08) acid, so because of dipolar ion exists, therefore |Z2| = 0.
At pH = 11,
COOH of glutamic acid has ($-$1), COOH of lysine ($-$1) and OH of phenol ($-$1).
Therefore, |Z3| = |$-$3| = 3 (All COOH and OH exist in the form of $-$COO$-$ and $-$O$-$).
$ \therefore $ |Z1| + |Z2| + |Z3| = 2 + 0 + 3 = 5
2020
TS-EAMCET
MCQ
TS EAMCET 2020 (Online) 14th September Evening Shift
Xerophthalmia disease is caused by the deficiency of
A.
vitamin K
B.
vitamin $\mathrm{B}_2$
C.
vitamin $\mathrm{B}_6$
D.
vitamin A
2020
TS-EAMCET
MCQ
TS EAMCET 2020 (Online) 14th September Evening Shift
- Which of the following statements support the cyclic form for glucose?
(i) It doesn't give Schiff's test.
(ii) It is found to exist in two different crystalline forms.
(iii) It oxidises with nitric acid to give saccharic acid.
(iv) Pentaacetate of glucose doesn't react with hydroxylamine.
A.
(i), (ii) and (iv)
B.
(i), (iii) and (iv)
C.
(ii) and (iii)
D.
(i), (ii) and (iii)
2020
TS-EAMCET
MCQ
TS EAMCET 2020 (Online) 10th September Evening Shift
$ \text { Choose the correct Zwitter ionic form for aspartic acid. } $
A.
B.
C.
D.
As, the species bear negatively charge over $\mathrm{COO}^{\ominus}$ and positivity charge over $\mathrm{H}_3 \stackrel{\oplus}{\mathrm{~N}}$-; due to migration of H -atom from -COOH to $-\mathrm{NH}_2$.
2020
TS-EAMCET
MCQ
TS EAMCET 2020 (Online) 10th September Morning Shift
Amino acids containing heterocyclic ring are
(i) Histidine
(ii) Valine
(iii) Arginine
(iv) Proline
A.
(i), (iv)
B.
(ii), (iii)
C.
(i), (iii)
D.
(ii), (iv)
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th April Evening Slot
Which of the given statements is INCORRECT about glycogen?
A.
It is a straight chain polymer similar to amylose
B.
It is present in animal cells
C.
It is present in some yeast and fungi
D.
Only $\alpha $-linkages are present in the molecule
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th April Morning Slot
Which of the following statements is not true about RNA?
A.
It controls the synthesis of protein
B.
It is present in the nucleus of the cell
C.
It usually does not replicate
D.
It has always double stranded $\alpha $-helix structure
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th April Morning Slot
Glucose and Galactose are having identical configuration in all the positions except position
A.
C–5
B.
C–3
C.
C–2
D.
C–4
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th April Evening Slot
Number of stereo centers present in linear and cyclic structures of glucose are respectively :
A.
4 & 4
B.
4 & 5
C.
5 & 4
D.
5 & 5
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th April Morning Slot
Amylopectin is compound of :
A.
$\alpha $-D-glucose, C1 – C4 and C1 – C6 linkages
B.
$\beta $-D-glucose, C1 – C4 and C2 – C6 linkages
C.
$\beta $-D-glucose, C1 – C4 and C1 – C6 linkages
D.
$\alpha $-D-glucose, C1 – C4 and C2 – C6 linkages
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 9th April Evening Slot
The peptide that gives positive ceric
ammonium nitrate and carbylamine tests is :
A.
Ser-Lys
B.
Asp-Gln
C.
Gln-Asp
D.
Lys-Asp
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 9th April Morning Slot
Which of the following statements is not true
about sucrose?
A.
The glycosidic linkage is present between
C1 of $\alpha $-glucose and C1 of $\beta $-fructose
B.
It is also named as invert sugar
C.
It is a non reducing sugar
D.
On hydrolysis, it produces glucose and
fructose
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 8th April Evening Slot
Fructose and glucose can be distinguished by :
A.
Barfoed's test
B.
Fehling's test
C.
Seliwanoff's test
D.
Benedict's test
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 8th April Morning Slot
Maltose on treatment with dilute HCI gives :
A.
D-Galactose
B.
D-Glucose and D-Fructose
C.
D-Glucose
D.
D-Fructose
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th January Evening Slot
The correct structure of histidine in a strongly acidic solution (pH = 2) is -
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th January Evening Slot
The correct statement (s) among I to III with respect to potassium ions that are abundant within the cell fluid
is /are
I. They activate many enzymes
II. They participate in the oxidation of glucose to produce ATP
III. Along with sodium ions they are responsible for the transmission of nerve signals
I. They activate many enzymes
II. They participate in the oxidation of glucose to produce ATP
III. Along with sodium ions they are responsible for the transmission of nerve signals
A.
III only
B.
I and II only
C.
I and III only
D.
I, II and III only
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th January Morning Slot
Among the following compounds most basic amino acid is -
A.
Lysine
B.
Asparagine
C.
Histidine
D.
Serine
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 11th January Evening Slot
The correct match between Item I and Item II is :
| Item I | Item II | ||
|---|---|---|---|
| (A) | Ester test | (P) | Tyr |
| (B) | Carbylamine test | (Q) | Asp |
| (C) | Phthalein dye test |
(R) | Ser |
| (S) | Lys | ||
A.
(A)$ \to $(Q); (B)$ \to $(S); (C)$ \to $(P)
B.
(A)$ \to $(R); (B)$ \to $(S); (C)$ \to $(Q)
C.
(A)$ \to $(R); (B)$ \to $(Q); (C)$ \to $(P)
D.
(A)$ \to $(Q); (B)$ \to $(S); (C)$ \to $(R)
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 11th January Morning Slot
Among the following compounds, which one is found in RNA ?
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th January Evening Slot
Which of the following tests cannot be used for identifying amino acids?
A.
Ninhydrin test
B.
Barfoed test
C.
Xanthoproteic test
D.
Biuret test
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th January Morning Slot
The correct structure of product 'P' in the following reactions is :
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 9th January Evening Slot
The correct sequence of amino acids present in the tripeptide given below is :
A.
Val - Ser - Thr
B.
Thr - Ser - Val
C.
Leu - Ser - Thr
D.
Thr - Ser - Leu
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 9th January Morning Slot
The increasing order of pka of the following amino acids in aqueous solution is :
Gly, Asp, Lys, Arg
Gly, Asp, Lys, Arg
A.
Asp < Gly < Arg < Lys
B.
Gly < Asp < Arg < Lys
C.
Asp < Gly < Lys < Arg
D.
Arg < Lys < Gly < Asp
2019
JEE Advanced
MSQ
JEE Advanced 2019 Paper 1 Offline
Which of the following statement(s) is(are) true?
A.
The two six-membered cyclic hemiacetal forms of D-(+)- glucose are called anomers.
B.
Oxidation of glucose with bromine water gives glutamic acid
C.
Monosaccharides cannot be hydrolysed to given polyhydroxy aldehydes and ketones
D.
Hydrolysis of sucrose gives dextrorotatory glucose and laevorotatory fructose
2018
JEE Mains
MCQ
JEE Main 2018 (Online) 16th April Morning Slot
Among the following, the incorrect statement is :
A.
Maltose and lactose has 1, 4 - glycosidic linkage.
B.
Sucrose and amylose has 1, 2 - glycosidic linkage
C.
Cellulose and amylose has 1, 4 - glycosidic linkage.
D.
Lactose contains $\beta $-D-galactose and $\beta $-D-glucose.
2018
JEE Mains
MCQ
JEE Main 2018 (Offline)
Glucose on prolonged heating with HI gives
A.
6-iodohexanal
B.
n-Hexane
C.
1-Hexene
D.
Hexanoic acid
2018
JEE Mains
MCQ
JEE Main 2018 (Offline)
The predominant form of histamine present in human blood is (pKa, Histidine = 6.0)
A.
B.
C.
D.
2018
JEE Mains
MCQ
JEE Main 2018 (Online) 15th April Evening Slot
The dipeptide, Gln-Gly, on treatment with CH3COCl followed y aqueous work up gives :
A.
B.
C.
D.
2018
JEE Mains
MCQ
JEE Main 2018 (Online) 15th April Morning Slot
Which of the following is the correct structure of Adenosine?
A.
B.
C.
D.
2018
JEE Advanced
MCQ
JEE Advanced 2018 Paper 2 Offline
The Fischer presentation of $D$-glucose is given below.
The correct structure(s) of $\beta $-$L$-glucopyranose is (are) :
The correct structure(s) of $\beta $-$L$-glucopyranose is (are) :
A.
B.
C.
D.
2017
JEE Mains
MCQ
JEE Main 2017 (Online) 9th April Morning Slot
The incorrect statement among the following is :
A.
$\alpha $-D-glucose and $\beta $-D-glucose are anomers.
B.
$\alpha $-D-glucose and $\beta $-D-glucose are enantiomers.
C.
Cellulose is a straight chain polysaccharide made up of only $\beta $-D-glucose units.
D.
The penta acetate of glucose does not react with hydroxyl amine