Q26
Allen
5. PROTEINS
MCQ
Which one is the most abundant protein in the animal world ?
A.
Collagen
B.
Insulin
C.
Trypsin
D.
Haemoglobin
Q27
Allen
6. NUCLEIC ACID
MCQ
Nucleic acids are made up of -
A.
Amino acids
B.
Pentose sugars
C.
Glycerol
D.
Nucleotides
Q28
Allen
6. NUCLEIC ACID
MCQ
Circular and double stranded DNA occurs in
A.
Golgi body
B.
Mitochondria
C.
Nucleus
D.
ER
Q29
Allen
6. NUCLEIC ACID
MCQ
Double helix model of DNA was proposed by-
A.
Watson and Crick
B.
Schleiden and Schwann
C.
Singer and Nicolson
D.
Kornberg and Khorana
Q30
Allen
6. NUCLEIC ACID
MCQ
Back bone in structure of DNA molecule is made up of -
A.
Pentose Sugar and phosphate
B.
Hexose sugar and phosphate
C.
Purine and pyrimidine
D.
Sugar and phosphate
Q31
Allen
6. NUCLEIC ACID
MCQ
Nucleotide is -
A.
N-base, pentose sugar and phosphoric acid
B.
Nitrogen, Hexose sugar and phosphoric acid
C.
Nitrogen base, pentose sugar
D.
Nitrogen base, trioses and phosphoric acid
Q32
Allen
6. NUCLEIC ACID
MCQ
Which element is not found in nitrogenous base?
A.
Nitrogen
B.
Hydrogen
C.
Carbon
D.
Phosphorus
Q33
Allen
6. NUCLEIC ACID
MCQ
A N-base together with pentose sugar and phosphate forms: -
A.
Nucleoside
B.
Polypeptide
C.
Nucleotide
D.
Amino acid
Q34
Allen
6. NUCLEIC ACID
MCQ
The purine & pyrimidine pairs of complementary strands of DNA are held together by ā
A.
H ā bonds
B.
O ā bonds
C.
C ā bonds
D.
N ā bonds
Q35
Allen
6. NUCLEIC ACID
MCQ
On an average, how many purine N bases are present in single coil of DNA?
A.
Four
B.
Five
C.
Ten
D.
Uncertain
Q36
Allen
6. NUCLEIC ACID
MCQ
ATP is-
A.
Nucleotide
B.
Nucleoside
C.
Nucleic acid
D.
Vitamin
Q37
Allen
6. NUCLEIC ACID
MCQ
In DNA, purine nitrogen bases are: -
A.
Uracil and Guanine
B.
Guanine and Adenine
C.
Adenine and cytosine
D.
None
Q38
Allen
6. NUCLEIC ACID
MCQ
Adenylic acid is: -
A.
Ribose + Adenine + phosphate
B.
Ribose + cytosine
C.
Nucleoside
D.
Deoxyribonucleotide
Q39
Allen
7. ENZYMES
MCQ
The fastest acting enzyme, in the biological kingdom among the following is:
A.
Lipase
B.
Amylase
C.
Peptidase
D.
Carbonic anhydrase
Q40
Allen
7. ENZYMES
MCQ
Apoenzyme is:
A.
Protein
B.
Vitamin
C.
Carbohydrate
D.
Amino acid
Q41
Allen
7. ENZYMES
MCQ
Which of the following inactivates the enzyme by changing its shape?
A.
Competitive inhibitor
B.
Allosteric inhibitor
C.
Coenzyme
D.
All of the above
Q42
Allen
7. ENZYMES
MCQ
Enzyme were discovered for the first time in:-
A.
Bacteria
B.
Yeast
C.
Algae
D.
Spinach
Q43
Allen
7. ENZYMES
MCQ
What is NADP?
A.
An enzyme
B.
An ion carrier
C.
H acceptor coenzyme
D.
A part of t-RNA
Q44
Allen
7. ENZYMES
MCQ
The cofactor of various respiratory enzymes is: -
A.
Ca
B.
B
C.
Mg
D.
Mo
Q45
Allen
7. ENZYMES
MCQ
Most enzymes consist of two parts these are :-
A.
Enzyme & substrate
B.
Enzyme & coenzyme
C.
Apoenzyme and enzyme
D.
Apoenzyme & cofactor
Q46
Allen
7. ENZYMES
MCQ
The first enzyme isolated in crystalline form was :-
A.
Catalase
B.
Urease
C.
Peroxidase
D.
Amylase
Q47
Allen
7. ENZYMES
MCQ
In plants, enzymes are present: -
A.
Only in flowers
B.
Only in leaves
C.
In all the living cells
D.
Only in parenchyma
Q48
Allen
7. ENZYMES
MCQ
Enzyme inhibition caused by a substrate analogue is :-
A.
Competitive
B.
Non-competitive
C.
In competitive
D.
Semi-competitive
Q49
Allen
7. ENZYMES
MCQ
Allosteric enzymes have allosteric sites for :
A.
Inhibition only
B.
Activation only
C.
Reduction in activation energy
D.
Both activation and inhibition
Q50
Allen
7. ENZYMES
MCQ
An example of competitive inhibition is :
A.
Succinic dehydrogenase by malonic acid
B.
Cytochrome oxidase by cyanide
C.
Hexokinase by glucose - 6 phosphate
D.
Carbonic anhydrase by carbon - dioxide