Chemistry - Biomolecules Structure and Functions and Chemistry of Some Biological Process
Exam Duration: 45 Mins Total Questions : 30
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
All protein that contain phosphorus is
- (a)
casein
- (b)
egg albumin
- (c)
heamogglobin
- (d)
NONE OF THE ABOVE
Night blindness is caused by the deficiency of vitamin
- (a)
A
- (b)
B1
- (c)
B12
- (d)
B2
Vitamin B6 is a mixture of
- (a)
pyridoxal and pyridoxine
- (b)
pyridoxal and pyridoxomine
- (c)
pyridoxal, pyridoxal and pyridoxomine
- (d)
NONE OF THE ABOVE
Which one of the disease is not caused due to deficiency pf vitamin C?
- (a)
scurvypernicious anaemia.
- (b)
pyorrhoea
- (c)
skin diseases
- (d)
pernicious anaemia
Deficiency of vitamin D causes
- (a)
anaemia
- (b)
breast cancer
- (c)
lung cancer
- (d)
rickets
Which one of the following is the harmful drug found in tobacoo?
- (a)
chinchonine
- (b)
quinine
- (c)
nicotine
- (d)
piperine
Antirachitic vitamin is also known as
- (a)
A
- (b)
B Complex
- (c)
C
- (d)
D
The sex hormone is
- (a)
parathormone
- (b)
Gonadotrophins
- (c)
Hydrocornsone
- (d)
Andrsterone
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
Pick out the wrong combination:
- (a)
\(Mg^{ 2+ }\rightarrow \quad photosynthesis\\ \)
- (b)
\(Fe^{ 2+ }\rightarrow \quad Heamoglobin\\ \)
- (c)
\(Se^{ 2+ }\rightarrow \quad Kreb's\quad cycle\\ \)
- (d)
\(CO^{ 2+ }\rightarrow \quad Vitamin\quad B_{ 12 }\\ \)
Which one of the following is not present in RNA?
- (a)
uracil
- (b)
thymine
- (c)
ribose
- (d)
phosphate
The hormone connected with the growth of animals is
- (a)
pepsin
- (b)
pityalin
- (c)
remine
- (d)
thyroxine
Which of the following is not a component of a typical nucleotide
- (a)
a sugar
- (b)
a protein
- (c)
a nitrogen base
- (d)
phosphoric acid
A carbohydrate which cannot be hydrolysed to simpler compounds is called
- (a)
monosaccharide
- (b)
disaccharide
- (c)
trisaccharide
- (d)
polysaccharide
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
Example of denaturation is
- (a)
curding of milk by bacteria
- (b)
coagulation of egg white on boiling
- (c)
Both (a) and (b)
- (d)
None of the above
Point odd one out among the following
- (a)
Pepsin
- (b)
Ptylin
- (c)
Lipase
- (d)
Cellulose
Glycogen is a branched chain polymer of \(\alpha -D\)-glucose units in which chain is formed by C1-C4 glycosidic linkage whereas branching occurs by the formation of C1-C6 glycosidic linkage. Structure of glycogen is similar to
- (a)
amylose
- (b)
amylopectin
- (c)
cellulose
- (d)
glucose
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)
\({ 3 }^{ \prime }and{ 3 }^{ \prime }\)
In disaccharides, if the reducing groups of monosaccharides i.e., aldehydic or ketonic groups are bonded, these are non-reducing sugars. Which of the following disaccharide is a non-reducing sugar?
- (a)
- (b)
- (c)
- (d)
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
Complementary bases present in DNA are
- (a)
uracil and adenine, cytosine and guanine
- (b)
adenine and guanine, thymine and cytosine
- (c)
adenine and guanine, guanine and uracil
- (d)
adenine and thymine, guanine and cytosine
Which of the following compounds can be detected by Molisch's test?
- (a)
Nitro compounds
- (b)
Sugars
- (c)
Amines
- (d)
Primary alcohols
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