answer script of aimnet-0
TRANSCRIPT
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Question:
A person is made asleep for 72 hours. Which of the following organ of the person will
be most affected?
Response:
legs
eye
Brain
Heart
Score 0 of 1
Question:
An exothermic reaction is
Response:
always reversible
always irreversible
sometimes reversible & sometimes irreversible
neither reversible nor irreversible
Score 0 of 1
Question:
ATPasees are involved in
Response:
ATP synthesis
ATP breakdown
acidifying intracellular components
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Both a & c
Score 0 of 1
Question:
Fats provide ____ calories of energy per gram
( )8
( )6
( )7
( )9
Response:
1
2
3
4
Score 1 of 1
Question:
Dental plaque formed by bacteria growing on the surface of teeth is rich in
Response:
Dextrans
Chitin
starch
Galactosamine
Score 0 of 1
Question:
Frond is
1) leaf like structure
2) a type of leaf
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3) present in bryophytes
4) Present in pteridophytes
Response:
1,3
2,3
2,4
1,4
Score 1 of 1
Question:
What is the role of Mg2+ which is found asociated with chlorophyll during
photochemical reactions?
Response:
It helps the chlorophyll in light absorption
It helps the chlorophyll in electron transfer
Both
None
Score 0 of 1
Question:
Which of the following metabolic pathway feeds necessary amount of ATP in the
animals which show fast movement?
Response:
glycolysis
Fermentation
Fatty acid oxidation
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TCA cycle
Score 0 of 1
Question:
A eukaryotic cell can use glucose (C6H12O6) and hexanoic acid (C6H14O2) as fuels
for cellular respiration. On the basis of their structural formulas, which substance
releases more energy per gram on complete combustion to CO2 and H2O?
Response:
Hexanoic acid will yield more energy on oxidation
Glucose will yield more energy on oxidation
Both a & b
None
Score 1 of 1
Question:
If Vo = Vmax/2. What will be the value of Km?
Response:
It will be equal to Vmax
It will be equal to Vo
It will be equal to Enzyme concentration
It will be equal to Substrate concentration
Score 0 of 1
Question:
Which of the following is true about fermentation?
Response:
It is anoxygenic process
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It changes the concentration of ATP
It changes the concentration of NADH
It changes the concentration of NADPH
Score 0 of 1
Question:
It is generally said that nitrogen fixation has a very high activation energy. Why?
Response:
Atmospheric nitrogen is chemically inert
The bond energy of N-N bond is very high (930 KJ/mol)
It is an endothermic process
All
Score 0 of 1
Question:
When photosystem I absorbs red light at 700 nm, the standard reduction potential ofP700 changes from -1.2 V to about 0.40 V. What fraction of the absorbed light is
trapped in the form of reducing power?
Response:
150/340
0.44
44%
All
Score 1 of 1
Question:
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In an in vitro experiment using radiolabelled nucleotides, a researcher is trying to
analyze the ducts of DNA replication by resolving the products using
ureapolyacrylamide gel electrophoresis. In one experimental set up RNase Hwas
added (Set 1), while in another set no RNase H was added (Set 2).
The possible observations of this experiment could be
A. There is no difference in the mobility of labeled DNA fragment between the Set 1
and Set 2.
B. There is distinct difference in the mobility of the newly synthesized labeled DNA
fragments between Set 1 and Set 2.
C. The mobility of the newly synthesized labeled DNA fragments in case of Set 1 is
faster as compared to the Set 2.
D. The mobility of the newly synthesized labeled DNA fragments in case of Set 1 is
slower as compared to the Set 2.
Which of the following combinations represent correct observations?
(a) A and B
(b) B and C
(c) A and D
(d) B and D
Response:
a
b
c
d
Score 1 of 1
Question:
Why muscle & brain cannot carryout gluconeogenesis?
Response:
They do not contain Glucose 6 phosphatases
They do not contain fructose 1,6 bisphosphatases
They do not contain Pyruvate carboxylase
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They do not contain PEP carboxykinase
Score 1 of 1
Question:
Which of the following method can be used to find out population density of beetles
of an area?
Response:
By direct counting
By quadrant sampling
By using tags
All of the above
Score 1 of 1
Question:
Which of the following amino acids is not derived from alpha ketoglutarate?
Response:
Glu
Gln
Cys
Pro
Score 0 of 1
Question:
The overall reaction of palmitic acid synthesis requires ____ ATPs and _____ Acetyl
CoA
( 1)8, 14
( 2)6,16
( 3)7,8
( 4)14, 6
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Response:
1
2
3
4
Score 0 of 1
Question:
Which of the following Vitamin D metabolism product is involved in regulation of
calcium binding protein synthesis?
Response:
Cholecalciferol
Retinol
7-dehydrocholesterol
1,25 dihydroxycholecalciferol
Score 0 of 1
Question:
Synthesis of normal hemoglobin requires coordinated synthesis of lpha globin and
beta globin. Thalassemias are genetic defects perturbed in this coordinated
synthesis. Patients suffering from deficiency of beta globin chains (beta-thalassemia)
could also be due to mulations affecting the biosynthesis of beta globin mRNA.
The following statements describe the genesis of non-functional beta globin leading
to beta-thalsaaemia.
A. Mutation in the promoter region of the beta globin gene.
B. Mutation in the splice junction of the beta globin gene.
C. Mutation in the intron I of the beta globin gene.
D. Mutations towards the 3` end of the beta globin gene the codes for
polyadenylation site.
Which of the following combinations is correct?
(a) A, B and D
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(b) A, B and C
(c) B, C and D
(d) C, D and A
Response:
a
b
c
d
Score 1 of 1
Question:
What is the unit of rate constant for a 5th order reaction?
Response:
L^4 mol^-4 min^-1
L^5 mol^-5 min^-1
L^3 mol^-3 min^-1
L^6 mol^-6 min^-1
Score 0 of 1
Question:
During cyclic photophosphorylation which of the following is not produced?
Response:
O2
NADPH
ATP
Both a & b
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Score 1 of 1
Question:
Caveolae are _____________ that have roles in cell signaling and membrane
internalization
Response:
invaginated lipid raft domains of the plasma membrane
invaginated protein raft domains of the plasma membrane
invaginated amino acid raft domains of the plasma membrane
invaginated fatty acid raft domains of the plasma membrane
Score 1 of 1
Question:
Which of the following is a cyclized derivative of glutamate?
Response:
Lysine
Arginine
Proline
Arginine
Score 1 of 1
Question:
Production of ____________ growth hormone is accentuated by plants in freezing
conditions
Response:
Auxin
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ABA
Ethylene
Gibberellin
Score 0 of 1
Question:
If the enzyme has similar specificity in occurance of clearage site and recognition of
clearage site, then turnover number
Response:
will have no effect on the catalysis
will increase the effect on the catalysis
will decrease the effect on the catalysis
either b & c
Score 1 of 1
Question:
Desmosine is
(1)a derivative of four Phe residues
(2)a derivative of four Lys residues
(3)a derivative of four Trp residues
(4)a derivative of four Ala residues
Response:
1
2
3
4
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Score 0 of 1
(skipped)
Question:
The high binding energy of nitrogen reduction is derived from
Response:
ADP phosphorylation
ATP Hydrolysis
Reduction of NADP+
Oxidation of NADPH
Score 0 of 1
Question:
Mutarotation is
Response:
inter conversion of alpha & beta anomers
inter conversion of epimers
inter conversion of enantiomers
inter conversion of sterioisomers
Score 0 of 1
Question:
Illuminated purple sulfur bacteria carry out photosynthesis in the presence of H2O
and 14CO2, but only if H2S is added and O2 is absent. During the course of
photosynthesis, measured by formation of [14C]carbohydrate, H2S is converted toelemental sulfur. What is the role of the conversion of H2S to sulfur?
Response:
It acts as a proton donor
It acts as electron donor
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Both a & b
None
Score 1 of 1
Question:
Which of the following value corresponds to escape velocity from earth?
Response:
1112 km/sec
112 km/sec
11.2 km/sec
1.12 km/sec
Score 0 of 1
Question:
By changing the orientation of ---OH at the 2nd position of D-mannose, it will beconverted into
Response:
D glucose
L glucose
L mannose
D galactose
Score 0 of 1
Question:
Cellular blastoderm is observed after ______ cleavage in drosophila
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Response:
10th, (Before mid blastula transition)
11th, (After mid blastula transition)
12th, (Before mid blastula transition)
13th, (After mid blastula transition)
Score 0 of 1
Question:
Which of the following part of embryo forms collecting duct of metanephric kidney?
Response:
Wolfian duct
Ureteric bud
Primary mesenchyme
Secondary mesenchyme
Score 0 of 1
Question:
Which of the following mechanism is used by enzyme Pyruvate dehydrogenase to
maintain the concentration of substrate for E2 portion of the enzyme?
Response:
By substrate channeling
By not allowing intermediates to leave the complex
By inhibiting release of acetyl CoA by the complex
All
Score 0 of 1
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Question:
How many ATP is synthesized during photophosphorylation?
Response:
1
2
3
4
Score 0 of 1
(skipped)
Question:
Following is a mechanism of the reaction catalyzed by pyruvate dehydrogenase
complex:- Pyruvate---TPP ----> Release of CO2 + Acetate---Lipoate ----> Acetate----
CoA ----> FADH2 ------> NADH + H+ During this process reducing equivalents are also
involved & CO2 is released. Which of the following molecules underwent reduction
during the complete process of conversion of pyruvate to Acetyl CoA.
1) Pyruvate
2) TPP
3) Acetate
4) Lipoate5) Coenzyme A
6) CO2
7) NADH
8) FAD
Response:
1,2,5
3,4,6
4,5,7,8
Only 8
Score 0 of 1
(skipped)
Question:
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A bacteria is kept under high Mutagen condition in which its DNA sequence
underwent mutation. Later on it was found that, the Succinate dehydrgenase of the
bacteria was incapable to catalyse the reaction which invloves conversion of
succinate to fumarate. However, it was able to recognize its substrate from the
cellular pool. What can be the most probable cause for this abservation?
1. Mutation affected the composition of cell membrane of bacteria
2. Mutation affected the folding of the protein
3. Mutation affected the gene encoding the above mentioned enzyme
4. Mutation affected the attachment of the enzyme to the membrane.
5. Mutation affected electron channeling through the enzyme.
Response:
1,3
2,4
1,2,3
3,4,5
Score 0 of 1
Question:
The bioogical nitrogen fixation requires electrons. Which of the following are possible
electron donors?
Response:
FAD
FMN
NADH
NADPH
Score 1 of 1
Question:
A researcher was performing an experiment with an enzyme. He was studying its
regulation. He found a very strange behavior when he observed the inhibition of the
enzyme by an inhibitor. The inhibitor when attached to the enzyme didn't had any
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effect on the km parameter, however Vmax value showed a change. What kind of
inhibition is showed by the enzyme?
Response:
competitive inhibition
Uncompetitive inhibition
Noncompetitive inhibition
Mixed inhibition
Score 1 of 1
Question:
Which buffer system is responsible for maintaining pH in cytoplasm of cells?
Response:
Bicarbonate buffer system
Phosphate buffer system
Citrate buffer system
All
Score 1 of 1
Question:
Which of the following bonds of protein restricts the complete unfolding of protein?
Response:
hydrophobic bond
H bond
Peptide bond
Disulphide bond
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Score 1 of 1
Question:
Shorter bonds have
Response:
higher bond order
less strength
more flexibility
least bond order
Score 0 of 1
Question:
If an inhibitor is added to a respiring mitochondria which blocks the electron passage
through pheophytin. The following things amy be observed:-
1) Electron flow through PS-I will stop
2) Electron flow through PS-II will stop
3) Electron flow through PS-I will increase
4) Electron flow through PS-II will increase
5) Electron flow through PS-I will slow down
6) Electron flow through PS-II will slow down
Response:
1,3,5
2,4,6
1,6
2,5
Score 1 of 1
Question:
The self linkage property is maximum in
Response:
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carbon
silicon
sulphur
phosphorus
Score 1 of 1
Question:
How many sigma & pie bonds are present in chloroform?
Response:
1 sigma & 3 pie
2 sigma & 2 pie
3 sigma & 1 pie
4 sigma & 0 pie
Score 0 of 1
Question:
What will be the value of enthalpy change in areaction which ia in equilibrium?
Response:
It will be comparable to delta G
It will be equal to the entropy involved
It will be equal to Temp x delta s
It will be equal to - [Temp x delta S]
Score 1 of 1
Question:
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Denaturation of protein means
Response:
Loss of 2 dimensional structure
Loss of 3 dimensional structure
Loss of protein function
Both b & c
Score 1 of 1
Question:
Transketolase catalyses transfer of ________ from ________ to __________.
Response:
2 - C compound, ketose , aldose
3- C compound, ketose , aldose
2 - C compound, aldose , ketose
3 - C compound, aldose, ketose
Score 1 of 1
Question:
Which of the following is an Phenylurea type cytokinin?
Response:
kinetin
zeatin
Thidiazuron
6-benzylaminopurine
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Score 0 of 1
(skipped)
Question:
Carbonic anhydrase of erythrocytes (Mr 30,000) has one of
the highest turnover numbers we know of. It catalyzes the reversible hydration of
CO2. This is an important process in the transport of CO2 from the tissues to the
lungs. If 10.0 microrgram of pure carbonic anhydrase catalyzes the hydration of 0.30
g of CO2 in 1 min at 37 degreeC at Vmax, what is the turnover number (kcat) of
carbonic anhydrase(in units of min^-1)?
Response:
1.0 x 10^7 per min
2.0 x 10^7 per min
3.0 x 10^7 per min
4.0 x 10^7 per min
Score 1 of 1
Question:
Kinks in fatty acid chains, is abserved due to ______ which interfere with packing in
the cell membrane.
Response:
cis double bonds
Trans double bonds
either a or b
Both a & b
Score 0 of 1
Question:
Which of the following statement about a chemical reaction is correct?
Response:
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All biological reactions are always under equilibrium
Cell do not allow reactions with large equilibrium constant to reachequilibrium
Cell always allow reactions with large equilibrium constant to reachequilibrium
All biological reactions are always under non-equilibrium
Score 1 of 1
Question:
Which of the following amino acid is derived from phenylalanine in mammals?
Response:
Tryptophan
Tyrosine
Aspartate
Glutamate
Score 1 of 1
Question:
The pka values of glycine is 2.34 & 9.60. What will be the pI of glycine?
Response:
11.94
7.26
5.97
None
Score 0 of 1
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Question:
Which of the following enzymes will have different EC no?
1) Hexokinase-I & IV
2) Succinate dehydrogenase & Citrate synthase
3) Glucokinase & Phosphofructo kinase
4) Malate dehydrogenase & Pyruvate dehydrogenase
Response:
1
2
3
4
All
Score 0 of 1
(skipped)
Question:
A 10% relative change in the concentration of ATP changes the concentration of AMP
by ________ %
Response:
6
60
600
6000
Score 0 of 1(skipped)
Question:
The following is a schematic representation of region (showing six bands) of the
polytene chromosome of Drosophila, along with the extent of five deletions (dell to
Del5):
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Carrot, Carotenoids
Score 1 of 1
Question:
What will be the concentration of OH- in a solution which shows a pH of 8?
Response:
10^-6
10^-7
10^-8
10^-9
Score 0 of 1
(skipped)
Question:
Linked Question1 to 6
Electron transfer translocates protons from a cell organelle matrix to the external
medium, establishing a pH gradient across the inner membrane (outside more acidic
than inside). The tendency of protons to diffuse back into the matrix is the driving
force for ATP synthesis by ATP synthase. During this process by a suspension of the
cell organelle in a medium of pH 7.4, the pH of the matrix has been measured as 7.7.
What is [H+] concentration in the external medium?
Response:
4 x 10^-8 mM
4 x 10^-8 M
4 x 10^-8 nM
4 x 10^-8 micro M
Score 0 of 1
Question:
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A person is locked in a room which has got a frictionless flooring. He wants to come
out of the room. What he should do to come out of the room?
Response:
He can come out by walking
He can throw something in the direction opposite to the walkingdirection.
both a & b
either a or b
Score 0 of 1
(skipped)
Question:
Histidine is derived from 4 precursors
5-Phosphoribosyl- 1-pyrophosphate (PRPP)
ATP
Glutamate
Glutamine
PRPP contributes _______ carbons, the purine ring of ATP contributes ____ Nitrogen
and ______ carbon, and glutamine supplies the second ring _______.
Response:
4, 5, 1, carbon,
5, 1, 1, Nitrogen
4, 2,3, carbon
5, 1,2, Nitrogen
Score 1 of 1
Question:
Individuals with a thiamine-deficient diet have relatively high levels of pyruvate in
their blood
Response:
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Correct Answer User answer
True True
Score 1 of 1
Question:
Radiation is the chief method of energy transfer
Response:
from the sun to an earth satellite
from a gas flame to water in a teakettle
from a soldering iron to metals being soldered.
from water to an ice cube floating in it
Score 0 of 1
(skipped)
Question:
The boiling point of a water is 100degree Celsius. What will be the effect on boiling
point when 0.1M sucrose is added to it?
Response:
It will increase
It will decrease
Addition of sucrose will have no effect on boiling point of water
both a or b
Score 0 of 1
Question:
Which is the second most abundant polysaccharide after cellulose?
Response:
Glucose
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RuBP
Chitin
N-acetyl glycosamine
Score 0 of 1
Question:
In 1804 Theodore de Saussure observed that the total weights of oxygen and dry
organic matter produced by plants is greater than the weight of carbon dioxide
consumed during photosynthesis. Where does the extra weight come from?
Response:
soil
Mg2+
Water
All
Score 0 of 1
Question:
Which of the following enzymes are involved in condensation reaction without ATP
involvement?
Response:
Synthases
Synthatases
Phosphorylases
Phosphatases
Score 0 of 1
Question:
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The anti-inflammatory drug aspirin blocks pain sensation by blocking
1. Cyclooxygenase
2. Prostaglandin H1 synthase
3. Prostaglandin H2 synthase
4. COX gene
5. Thromoxane synthase6. Thromboxame hydrolase
Response:
1,3,5
1,3
2,4,6
4,6
Score 0 of 1
Question:
Restriction endonuclease cleaves DNA molecules at specific recognition sites. One
such enzyme has four recognition sites on a circular DNA molecule. After complete
digestion, how many fragments would produced upon reaction with this enzyme?
(a) 4
(b) 5
(c) 3
(d) 6
Response:
a
b
c
d
Score 1 of 1
Question:
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Score 1 of 1
Question:
A child is suffering from Marasmus characterized by peeling and alternately
pigmented skin. Doctor prescribes a suitable diet which must contain
( 1)Vitamin E
(2 )Vitamin B
( 3)Vitamin A
( 4)Vitamin C
Response:
1
2
3
4