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XL Life Science- 2015 GATE Paper (Practice Test) - GATE MCQ


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125 Questions MCQ Test - XL Life Science- 2015 GATE Paper (Practice Test)

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XL Life Science- 2015 GATE Paper (Practice Test) - Question 1

Q 1- 5 Carry one mark each.

Q.

Choose the appropriate word/ pharase , out of the four options given below, to complete the following sentence:

apparent lifelessness ___________________ dormant life.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 2

Fill in te blank with the correct idiom/ pharase.

That boy from the worn was a ___________________ in the sleepy village.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 3

Choose the statement where underlined word is used correctly.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 4

Tanya is older than Eric.

Cliff is polder than Tanya

Eric is older than cliff.

If the first two statements are true, then the third statement is :

XL Life Science- 2015 GATE Paper (Practice Test) - Question 5

Five teams have to compete in a league, with every team playing every other team exactly once, before going to the next round. How many matches will have to be held to completer the league round of matches?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 6

Q No 6 - 10 carry Two marks each

Q.

Select the appropriate option in place of underlined part of the sentnce.

" Increased productivity necessary " reflects greater efforts made by the employee.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 7

Given below are two statements followed by two conclusions. Assuming these statements to be true, decide which one logically follows.

Statements:

I. No manager is leader.

II All leaders are executives.

Conclusions:

I No manager is an executive

II No executive is a manager.

*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 8

In the given figure angle  is a right angle, PS:QS= 3:1, RT: QT=5:2 and PU: UR = 1:1. if area of triangle QTS is 20 cm2.  then the area of triangle PQR in cm2 is ________________.

 

(Important : you should answer only the numeric value)


XL Life Science- 2015 GATE Paper (Practice Test) - Question 9

Right triangle PQR is to be constructed in the xy- plane so that the right angle is at P and line PR is parallel to the x-axis. The x and y coordinates of P,Q, and R are to be integers that satisfy the inequalities -4x5 and 6 16. How many diffrent triangles could be constructed with these properties ?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 10

A coin is tossed thrice. Let X be the event that head occurs in each of the first two tosses. Let Y be the event that a tail occurs on the third toss. Let Z be the event that two tails occur in three tosses. Based on the  above information, which one of the following statements is TRUE?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 11

Q. 11 – Q. 15 carry one mark each.

Q.

The molecule having net ‘non-zero dipole moment’ is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 12

The Diels-Alder adduct from the reaction between cyclopentadiene and benzyne is

*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 13

The number of possible enantiomeric pair(s) in HOOC−CH(OH)−CH(OH)−COOH is________

 

(Important : you should answer only the numeric value)


*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 14

For the electrochemical reaction  the equilibrium constant at 25o C is 1.7 x 1037. The change in standard Gibbs free energy (ΔGo) for this reaction at that temperature will be ________ kJ mol−1 (up to one decimal place).
(Given: R = 8.314 JK−1mol−1)


XL Life Science- 2015 GATE Paper (Practice Test) - Question 15

Among the following diagrams, the one that correctly describes a zero order reaction
(X → product) is
(Given: [X]o = initial concentration of reactant X; [X] = concentration of reactant X at time t
and t1/2 = half-life period of reactant X)

XL Life Science- 2015 GATE Paper (Practice Test) - Question 16

Q.16 – Q. 25 carry two marks each.

Q.

If the radius of first Bohr orbit is 0.53 Å, then the radius of the third Bohr orbit is

*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 17

If 50 mL of 0.02 M HCl is added to 950 mL of H2O, then the pH of the final solution will
be________

 

(Important : you should answer only the numeric value)


XL Life Science- 2015 GATE Paper (Practice Test) - Question 18

Stability of  follows the order
(Given: Atomic numbers of Cr = 24, Mn = 25 and Fe = 26)

XL Life Science- 2015 GATE Paper (Practice Test) - Question 19

Among the following pairs, the paramagnetic and diamagnetic species, respectively, are

XL Life Science- 2015 GATE Paper (Practice Test) - Question 20

In compounds K4[Fe(CN)6] (P) and Fe(CO)5 (Q), the iron metal centre is bonded to

XL Life Science- 2015 GATE Paper (Practice Test) - Question 21

Among the following reactions, the one that produces achiral alcohol (after hydrolysis) is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 22

The major product from the following reaction is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 23

The order of resonance energy for the following molecules is

*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 24

The molar enthalpy of vaporization for a liquid (normal boiling point = 78.3oC) is 39 kJ mol−1. If
the liquid has to boil at 25o C, the pressure must be reduced to ________Torr (up to one decimal
place).

(Given: R = 8.314 JK−1mol−1; 1 atm = 760 Torr)


XL Life Science- 2015 GATE Paper (Practice Test) - Question 25

For the process,  and 1 atm, the correct statement is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 26

Q. 26 – Q. 35 carry one mark each.

Q.

Which one of the following small molecules is a prerequisite for fatty acid oxidation?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 27

Which one of the following bases is NOT found in the T-arm of an aminoacyl t-RNA?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 28

Oxidation of one molecule of glucose via the glycerol-phosphate shuttle produces

XL Life Science- 2015 GATE Paper (Practice Test) - Question 29

Ribulose-5-phosphate epimerase is involved in which one of the following processes?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 30

Proteolytic enzymes are usually biosynthesized as large, inactive precursors known as

XL Life Science- 2015 GATE Paper (Practice Test) - Question 31

The formation of a carbocation, also called an oxonium ion, occurs during the reaction catalyzed by

XL Life Science- 2015 GATE Paper (Practice Test) - Question 32

Which one of the following amino acid substitutions is likely to cause the largest change in protein conformation?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 33

Which one of the following does NOT constitute the lipid moiety in lipid-linked membrane proteins?

*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 34

A closed circular B-DNA of 4000 base pairs is negatively supercoiled by introduction of 4 writhes. The super helical density of the resultant DNA molecule will be _________

 

(Important : you should answer only the numeric value)


XL Life Science- 2015 GATE Paper (Practice Test) - Question 35

Which one of the following is NOT a receptor tyrosine kinase?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 36

Q. 36 – Q. 45 carry two marks each.

Q.

Match the entries in Column-1 with those in Column-2

XL Life Science- 2015 GATE Paper (Practice Test) - Question 37

The following table provides information about four proteins.

Which one of the following options correctly identifies the order of elution in size exclusion chromatography and the increasing order of mobility in SDS polyacrylamide gel?

*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 38

The predicted molar extinction coefficient at 280 nm for the peptide GEEFHISFLLIMFGAWSTHMYRTYWFIHEMISTRY is _______ M-1cm-1.

(Important : you should answer only the numeric value)


XL Life Science- 2015 GATE Paper (Practice Test) - Question 39

Match the contents of Column I with the most appropriate options in Column II

*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 40

The value of ΔG at 37 °C for the movement of Ca2+ ions from the endoplasmic reticulum where [Ca2+] is 1 mM to the cytosol where [Ca2+] is 0.1 μM at −50 mV membrane potential is _______________ kJ mol-1

[ R = 8.314 JK−1mol−1 and 1 Faraday = 96500 Coulombs] .


XL Life Science- 2015 GATE Paper (Practice Test) - Question 41

Which of the following identifies the correctly matched pairs?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 42

Which of the following statements is/are INCORRECT about hemoglobin (Hb)?
I. Hb demonstrates higher oxygen carrying capacity compared to myoglobin
II. There is covalent bonding between the four subunits of Hb
III. During deoxygenation the loss of the first oxygen molecule from oxygenated Hb promotes the dissociation of oxygen from the other subunits

XL Life Science- 2015 GATE Paper (Practice Test) - Question 43

A 1.2 kb DNA fragment was used as a template for PCR amplification using primers P1, P2, P3 and P4 as shown in the scheme below. The annealing positions of primers on the template are indicated by numbers. Primers P2 and P3 contain single base mismatches as indicated by filled triangles.

PCR was performed using primer pair P1 and P3 in one vial and P2 and P4 in another vial. The purified PCR products from the two vials were mixed and subjected to another round of PCR with primers P1 and P4. The final PCR product will correspond to a

XL Life Science- 2015 GATE Paper (Practice Test) - Question 44

A cell suspension was subjected to membrane disruption followed by differential centrifugation to fractionate the cellular components. Match the centrifugal conditions in Column I to the appropriate subcellular components in Column II.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 45

Given below are the maps of a 1200 base pairs (bp) long DNA insert and a 3000 bp expression vector. The BamHI (B) and HindIII (H) restriction sites and DNA length between them are indicated in base pairs.

The insert is cloned into the vector at the BamHI site and the desired orientation is shown by the arrow. After cloning, the orientation of the insert in the recombinant plasmid is tested by complete HindIII digestion followed by agarose gel electrophoresis. Which one of the following band patterns reveals the correct orientation of the insert in the construct?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 46

Q. 46 – Q. 55 carry one mark each.

Q.

Nuclear membrane is absent in

XL Life Science- 2015 GATE Paper (Practice Test) - Question 47

An organized and differentiated cell having cytoplasm but no nucleus is found in

XL Life Science- 2015 GATE Paper (Practice Test) - Question 48

Double haploids in plants can be induced by

XL Life Science- 2015 GATE Paper (Practice Test) - Question 49

During fatty acid biosynthesis, the first intermediate malonyl-CoA is formed from

XL Life Science- 2015 GATE Paper (Practice Test) - Question 50

Which of the following techniques is NOT applicable for evaluating the expression of a transgene?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 51

Identify the CORRECT family possessing the following characters: presence of glucosinolates,
tetradynamous stamens, superior ovary with parietal placentation and siliqua type fruit

XL Life Science- 2015 GATE Paper (Practice Test) - Question 52

Which of the following reduces the transpiration rate when applied to aerial parts of plants?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 53

A tube like membrane structure that forms the connection between the endoplasmic reticulum of
neighboring cells through plasmodesmata is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 54

Which one of the followings is NOT a cryoprotectant for plant tissue?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 55

Two similar holotypes are called

XL Life Science- 2015 GATE Paper (Practice Test) - Question 56

Q. 56 – Q. 65 carry two marks each.

Q.

A cross was made between AABBCCDDEE and aabbccddee. The resultants F1 were selfed.
Applying Mendelian principle, PREDICT the proportion of phenotype showing all the recessive
characters in F2 generation.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 57

Identify the CORRECT statements with respect to functioning of ecosystem.
P. A food chain is a series of organisms, each one feeding on the organism succeeding it
Q. Food web presents a complete picture of the feeding relationships in any given ecosystem
R. In ecosystem, energy flows in unidirectional way, whereas nutrients flow in cyclic fashion
S. In biogeochemical cycles, nutrients do not alternate between organisms and environment

XL Life Science- 2015 GATE Paper (Practice Test) - Question 58

Match the name of the diseases with their causal organisms.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 59

Match the plant products with their sources and the plant parts from which they are obtained.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 60

Match the floral structures with the families and representative plant species.

XL Life Science- 2015 GATE Paper (Practice Test) - Question 61

Identify the INCORRECT statements with respect to plastid transformation.
P. Antibiotic used for selection of trasplastomic plant is spectinomycin
Q. Chances of gene escape from transplastomic plants are high
R. Microprojectile bombardment is the method of DNA delivery
S. Levels of transgene expression are low

XL Life Science- 2015 GATE Paper (Practice Test) - Question 62

Which of the following statements are TRUE with regard to the similarities between Crassulacean
Acid Metabolism (CAM) and C4 cycle?
P. Stomata open during night and remain closed during the day
Q. PEPcase is the carboxylating enzyme to form C4 acid
R. C4 acid is decarboxylated to provide CO2 for C3 cycle
S. Kranz anatomy is predominant in both CAM and C4 plants

XL Life Science- 2015 GATE Paper (Practice Test) - Question 63

With respect to germination of seeds, the CORRECT sequence of events is
P. Seed imbibes water
Q. Mobilization of starch reserve to embryo
R. Diffusion of gibberellin from embryo to aleurone layer
S. Synthesis of α-amylase in the aleurone layer

XL Life Science- 2015 GATE Paper (Practice Test) - Question 64

Identify the CORRECT statements with regard to the function of plant hormones
P. ABA is synthesized from chorismate and promotes viviparous germination
Q. Auxin induces acidification of cell wall followed by turgour-induced cell expansion
R. Gibberellin-reponsive genes become activated by the repression of DELLA protein
S. Cytokinin regulates the G2 to M transition in the cell cycle

XL Life Science- 2015 GATE Paper (Practice Test) - Question 65

Statements given below are either TRUE (T) or FALSE (F). Find the correct combination.
P. Somatic embryo is unipolar in nature
Q. Heterokaryon can be selected using a fluorescence-activated cell sorter (FACS)
R. The term somaclonal variation is coined by Larkin and Scowcroft
S. Differentiation of shoot buds during in vitro culture is known as somatic embryogenesis

XL Life Science- 2015 GATE Paper (Practice Test) - Question 66

Q. 66 – Q. 75 carry one mark each.

Q.

Lophotrichous bacteria have

XL Life Science- 2015 GATE Paper (Practice Test) - Question 67

In aerobic respiration, the final electron acceptor is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 68

A process in which fatty acids are shortened by two carbons at a time resulting in release of acetyl-
CoA is known as

XL Life Science- 2015 GATE Paper (Practice Test) - Question 69

Limulus Amoebocyte Lysate (LAL) assay is used to identify the presence of

XL Life Science- 2015 GATE Paper (Practice Test) - Question 70

Match scientists in Group I with terms related to their major scientific contributions in Group II

XL Life Science- 2015 GATE Paper (Practice Test) - Question 71

Base-pair substitutions caused by the chemical mutagen ethyl methane sulfonate are a result of

XL Life Science- 2015 GATE Paper (Practice Test) - Question 72

The classical way of representing taxonomic hierarchy of living organisms in ASCENDING
ORDER is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 73

Of the following, the most effective method to kill bacterial endospores is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 74

The class of enzymes, which catalyze addition of groups to double bonds and non-hydrolytic
removal of chemical groups, is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 75

Anammox organisms carry out

XL Life Science- 2015 GATE Paper (Practice Test) - Question 76

Q. 76 – Q. 85 carry two marks each.

Q.

Which combination of the following statements about specialized transduction is TRUE?
(P) Specialized transducing phages can transport only certain genes between bacteria
(Q) Specialized transducing phages can transport any gene between bacteria
(R) Phage P22 is a specialized transducing phage
(S) Phage lambda (λ) is a specialized transducing phage

XL Life Science- 2015 GATE Paper (Practice Test) - Question 77

Which combination of profiles in the following figure accurately represents the transport rate of
glycerol and oxygen into E. coli cells as a function of their extracellular concentration?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 78

Which one of the following about the standard free energy change (ΔGo′) and the equilibrium
constant (Keq) of an exergonic reaction, at pH 7.0, is TRUE?

*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 79

An oil immersion objective of a light microscope has a numerical aperture of 1.25. Using the Abbé
equation, the maximum theoretical resolving power (in nm) of the microscope with this objective
and blue light (wavelength = 450 nm) is ______

 

(Important : you should answer only the numeric value)


*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 80

The working volume (in liter) of a chemostat with 0.1 h-1 dilution rate and 100 ml/h feed flow rate
is______

(Important : you should answer only the numeric value)


*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 81

If the decimal reduction time for spores of a certain bacterium at 121oC is 12 seconds, the time
required (in minutes) to reduce 1010 spores to one spore by heating at 121oC is _______

 

(Important : you should answer only the numeric value)


*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 82

The doubling time (in minutes) of a bacterium with a specific growth rate of 2.3 h-1 in 500 ml of
growth medium is ______


*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 83

A bacterial culture is grown using 2.0 mg/ml fructose as the sole source of carbon and energy. The
bacterial biomass concentrations immediately after inoculation and at the end of the growth phase
are 0.1 mg/ml and 0.9 mg/ml, respectively. Assuming complete utilization of the substrate, the
bacterial growth yield (Y) on fructose is ______

 

(Important : you should answer only the numeric value)


*Answer can only contain numeric values
XL Life Science- 2015 GATE Paper (Practice Test) - Question 84

The volume (in ml) of a 1.0 mg/ml stock solution of ampicillin to be added to 0.1 liter of growth
medium for achieving a final ampicillin concentration of 50 μg/ml is ______

 

(Important : you should answer only the numeric value)


XL Life Science- 2015 GATE Paper (Practice Test) - Question 85

An E. coli strain is grown initially on glucose as the sole carbon source. Upon complete
consumption of glucose following 12 h of growth, lactose is added as the sole carbon source and
the strain is further grown for 12 h. Assuming that the E. coli strain has a functional wild type lac
operon, which one of the following profiles is the most ACCURATE representation of β-
galactosidase (β-gal) expression (in arbitrary units)?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 86

Q. 1 – Q. 10 carry one mark each.

Q.

The term “paedomorphosis” refers to

XL Life Science- 2015 GATE Paper (Practice Test) - Question 87

Which one of the following statements is TRUE when determining the age of a fossil using carbon dating?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 88

Constitutive enzymes are

XL Life Science- 2015 GATE Paper (Practice Test) - Question 89

Which one of the following is a function of intermediate filaments?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 90

Which one of the following statements is FALSE with respect to phospholipids?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 91

Which one of the following organs is INCORRECTLY paired with its function?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 92

Where do B lymphocytes acquire immune competence?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 93

Which one of the following life cycle stages of Plasmodium falciparum is infectious?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 94

What is the role of the notochord during organogenesis in a vertebrate embryo?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 95

The behavior of young ducks following their mother is known as

XL Life Science- 2015 GATE Paper (Practice Test) - Question 96

Q. 96 – Q. 105 carry two marks each.

Q.

Match the species names with class names

XL Life Science- 2015 GATE Paper (Practice Test) - Question 97

A population of spotted deer found in a national forest is in Hardy-Weinberg equilibrium. For a particular genetic locus in this deer species, only two alleles A and a are possible. If the frequency of the A allele in this population is 0.6, and the frequency of the a allele is 0.4, what will be the frequency of the genotype Aa?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 98

In Drosophila, the gene for eye colour is present on the X chromosome. When a red-eyed female was mated with a white-eyed male, a total of 100 progeny were obtained – 50 females and 50 males. Of the 50 females, 25 were red-eyed, and 25 were white-eyed. How many of the male progeny were red-eyed?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 99

Defect in poly-A tail formation in eukaryotic mRNA leads to

XL Life Science- 2015 GATE Paper (Practice Test) - Question 100

Assuming equal frequency for all 4 nucleotides (G, A, T, C), how many EcoRI recognition sites (GAATTC) are possible in a bacterial artificial chromosome of 100,000 base pairs?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 101

Choose the correct option that shows pairing of the organelle to its function

XL Life Science- 2015 GATE Paper (Practice Test) - Question 102

Choose the correct option based on your understanding of the circulatory system

XL Life Science- 2015 GATE Paper (Practice Test) - Question 103

The popular birth control pills for women have a combination of synthetic forms of estradiol and progesterone. Which one of the following statements is INCORRECT with regard to their function as contraceptive?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 104

Which one of the following is consistent with the germplasm theory of August Weismann?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 105

Which one of the following statements DOES NOT explain altruism?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 106

Q. 106 – Q. 115 carry one mark each.

Q.

Standard pasteurization protocol for milk is adequate for destroying

XL Life Science- 2015 GATE Paper (Practice Test) - Question 107

Which one of the following is NOT a component of an evaporator?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 108

Among the following animal foods, the fat content is least in

XL Life Science- 2015 GATE Paper (Practice Test) - Question 109

The enzyme that hydrolyzes starch to maltose is

XL Life Science- 2015 GATE Paper (Practice Test) - Question 110

Which one of the following is NOT enriched in endosperm during parboiling of paddy?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 111

Heat-treated legume seed proteins are more digestible than those of untreated legume seed proteins
due to

XL Life Science- 2015 GATE Paper (Practice Test) - Question 112

What is the percent relative humidity at which both the dry bulb and wet bulb thermometers would
record equal temperatures?

XL Life Science- 2015 GATE Paper (Practice Test) - Question 113

How many fold would the g-number of a centrifuge increase by doubling both the spinning speed
and bowl diameter?