JEE Main Chemistry - Biomolecules Structure and Functions and Chemistry of Some Biological Process
Exam Duration: 60 Mins Total Questions : 30
Glucose on reduction with sodium-amalgam in aqueous solution gives
- (a)
manitol
- (b)
sorbitol
- (c)
monnitol and sorbitol both
- (d)
NONE OF THE ABOVE
Glucose can be converted to fructose through
- (a)
phenyl hydrazone formation
- (b)
oxime formation
- (c)
osazone formation, subsequent hydrolysis and reduction
- (d)
NONE OF THE ABOVE
Which one of the following hormons contains iodine?
- (a)
tyroxine
- (b)
estrogen
- (c)
adrenaline
- (d)
insulin
Generally proteins contain more than
- (a)
\(50\ \alpha \) - amino acids
- (b)
\(100\ \alpha \) - amino acids
- (c)
\(60\ \alpha \) - amino acids
- (d)
\(75\ \alpha \) - amino acids
The approximate molecular weight of casein in amu is
- (a)
75000
- (b)
68000
- (c)
39000
- (d)
35100
DNA consists of units known as
- (a)
deoxyribose
- (b)
glucosides
- (c)
nucleotides
- (d)
peptides
Lack of vitamin B1 causes
- (a)
beriberi
- (b)
inflammation of lips
- (c)
dermatitis
- (d)
scurvy
Deficiency of vitiamin B12 causes
- (a)
loss of appetite
- (b)
anaemia
- (c)
pernicious anaemia
- (d)
skin diseases
Insulin is used in the treatment of
- (a)
anaemia
- (b)
breast cancer
- (c)
lung cancer
- (d)
diabets
Deficiency of vitamin D causes
- (a)
anaemia
- (b)
breast cancer
- (c)
lung cancer
- (d)
rickets
Antirachitic vitamin is also known as
- (a)
A
- (b)
B Complex
- (c)
C
- (d)
D
The structure of a peptide is \({ H }_{ 2 }N-CONH\underset { \overset { | }{ CH } }{ CH } \quad CONH\quad \underset { \overset { | }{ { \left( { CH }_{ 3 } \right) }_{ 2 } } }{ CH } \) the Name of the peptide is
- (a)
glycyl alanyl valine
- (b)
glycyl valyl alanine
- (c)
alonyl valyl glycine
- (d)
valyl alanyl glycine
Pick out the correct statement :
A: \(\alpha \) - D glucose; B: \(\beta \)- D glucose
- (a)
A and B are crystal modifications
- (b)
A is an aldose and B is a ketose
- (c)
A and B are epimers
- (d)
A is a pyranose and B is a furanose suger
Which one of the following is not present in RNA?
- (a)
uracil
- (b)
thymine
- (c)
ribose
- (d)
phosphate
Vitamin B deficiency leads to disease known as
- (a)
blindness
- (b)
beri-beri
- (c)
scurvy
- (d)
T.B
A carbohydrate which cannot be hydrolysed to simpler compounds is called
- (a)
monosaccharide
- (b)
disaccharide
- (c)
trisaccharide
- (d)
polysaccharide
Cane sugar on hydrolysis give
- (a)
glucose + lactose
- (b)
fructose + fructose
- (c)
glucose + fructose
- (d)
glucose + glucose
Which of the following is the sweetest sugar?
- (a)
Glucose
- (b)
Fructose
- (c)
Maltose
- (d)
Sucrose
Cellulose is a polymer of
- (a)
glucose
- (b)
fructose
- (c)
sucrose
- (d)
ribose
A Zwittter ion is
- (a)
negatively charged ion without metal atom
- (b)
heavy ion with a small charge on it
- (c)
an ion with positive and negative charge at different points on it
- (d)
a positively charged ion without a metal ion
All proteins are
- (a)
simple
- (b)
polymers
- (c)
biocatalysts
- (d)
useful
Point odd one out among the following
- (a)
Pepsin
- (b)
Ptylin
- (c)
Lipase
- (d)
Cellulose
Which of the following acids is a vitamin?
- (a)
Aspartic acids
- (b)
Ascorbic acid
- (c)
Adipic acid
- (d)
Saccharic acid
Protein on heating with conc. HNO3 give yellow colour, this test is called
- (a)
Hoppe's test
- (b)
acid-base test
- (c)
oxidising test
- (d)
xanthoprotic test
Dinucleotide is obtained by joining two nucleotides together by phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present?
- (a)
\({ 5 }^{ \prime }and{ 3 }^{ \prime }\)
- (b)
\({ 1 }^{ \prime }and{ 5 }^{ \prime }\)
- (c)
\({ 5 }^{ \prime }and{ 5 }^{ \prime }\)
- (d)
\({ 3 }^{ \prime }and{ 3 }^{ \prime }\)
Which of the following reactions of glucose can be explained by the cyclic structure?
- (a)
Glucose reacts with hydroxyl amine to form an oxime
- (b)
Glucose forms pentaacetate
- (c)
Pentaacetate of glucose does not react with hydroxyl amine
- (d)
Glucose is oxidised by nitric acid to gluconic acid
Biuret test is not given by
- (a)
carbohydrates
- (b)
polypeptides
- (c)
urea
- (d)
proteins
Insulin production and its action in human body are responsible for the level of diabeties. This compound belongs to which of the following categories?
- (a)
A coenzyme
- (b)
A hormone
- (c)
An enzyme
- (d)
An antibiotic