Answer Script of AIMNET-0

8/2/2019 Answer Script of AIMNET-0

1/31

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


2/31

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


3/31

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


4/31

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


5/31

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:


6/31

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


7/31

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


8/31

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


9/31

(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


10/31

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


11/31

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


12/31

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


13/31

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


14/31

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


15/31

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:


16/31

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


17/31

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


18/31

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:


19/31

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:


20/31

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


21/31

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:


22/31

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


23/31

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):


24/31


25/31

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:


26/31

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:


27/31

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


28/31

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:


29/31

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:


30/31


31/31

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

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Answer Script of AIMNET-0