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1
JEE Main 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Out of the following, which type of interaction is reponsible for the stabilisation of $$\alpha $$-helix structure of proteins ?
A
Covalent bonding
B
vander Waals forces
C
Ionic bonding
D
Hydrogen bonding
2
JEE Main 2020 (Online) 6th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
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
3
JEE Main 2020 (Online) 5th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following is not an essential amino acid :
A
Valine
B
Leucine
C
Lysine
D
Tyrosine
4
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
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
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