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Biological Science - 2018 Past Year Paper - IIT JAM MCQ


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60 Questions MCQ Test IIT JAM Past Year Papers and Model Test Paper (All Branches) - Biological Science - 2018 Past Year Paper

Biological Science - 2018 Past Year Paper for IIT JAM 2024 is part of IIT JAM Past Year Papers and Model Test Paper (All Branches) preparation. The Biological Science - 2018 Past Year Paper questions and answers have been prepared according to the IIT JAM exam syllabus.The Biological Science - 2018 Past Year Paper MCQs are made for IIT JAM 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Biological Science - 2018 Past Year Paper below.
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Biological Science - 2018 Past Year Paper - Question 1

One of Koch’s postulates states that the suspected causative organism should

Biological Science - 2018 Past Year Paper - Question 2

Archaebacteria differ from bacteria in

Biological Science - 2018 Past Year Paper - Question 3

Which one of the following, involving transfer of a phosphate group, is an example of substratelevel phosphorylation?

Biological Science - 2018 Past Year Paper - Question 4

Lysosomal targeting of proteins involves recognition of

Biological Science - 2018 Past Year Paper - Question 5

In vitro, group I introns have the ability to

Biological Science - 2018 Past Year Paper - Question 6

In polypeptide chains, the proline residue is unique in

Biological Science - 2018 Past Year Paper - Question 7

Which one of the following microscopes has working principle most similar to the way a blind person reads?

Biological Science - 2018 Past Year Paper - Question 8

Many plasma glycoproteins are protected from uptake and degradation by the hepatocytes in liver due to the presence of a terminal saccharide moiety known as

Biological Science - 2018 Past Year Paper - Question 9

In mammals, which one of the following vitamins is required in amino group transfer reaction?

Biological Science - 2018 Past Year Paper - Question 10

‘Philadelphia chromosome’ is NOT linked to 

Biological Science - 2018 Past Year Paper - Question 11

Decreasing the concentration of sodium ions from double stranded DNA solution results in decrease in Tm. This happens because of increased

Biological Science - 2018 Past Year Paper - Question 12

During pre-mRNA splicing reaction, a lariat RNA is formed when the intron cleaved at the 5’ splice site gets linked by a

Biological Science - 2018 Past Year Paper - Question 13

Match the endocrine gland in Group A with the hormone secreted by them in Group B

Biological Science - 2018 Past Year Paper - Question 14

A plant producing white flower with white seed coat (dominant) was crossed with a plant producing violet flower with gray seed coat (recessive). Upon selfing of 144 F2 progeny plants, the number of plants continuing to produce violet flower with gray seed coat will be

Biological Science - 2018 Past Year Paper - Question 15

A dihybrid phenotypic ratio of 15:1 was obtained while making a cross of AaBb x AaBb. This is an example of

Biological Science - 2018 Past Year Paper - Question 16

On infection by a specific virus, a host generates cytotoxic T cells that kill

Biological Science - 2018 Past Year Paper - Question 17

Which one of the following combinations showing the chromosome numbers for human cells is CORRECT?

Biological Science - 2018 Past Year Paper - Question 18

The function y=1 is an equation of a

Biological Science - 2018 Past Year Paper - Question 19

Bottle X contains 1 L of water, while bottle Y, which has the same capacity as X, is empty. Water is poured from bottle X to Y. The plot of the quantity of water in Y as a function of the quantity of water in X is

Biological Science - 2018 Past Year Paper - Question 20

The derivative of 2x with respect to x is​

Biological Science - 2018 Past Year Paper - Question 21

An example of transcytosis is

Biological Science - 2018 Past Year Paper - Question 22

Which of the following techniques can be used to detect protein-protein interactions in-vivo?
[P] Two hybrid assay
[Q] Fluorescence resonance energy transfer
[R] Fluorescence recovery after photobleaching
[S] Gel-shift assay

Biological Science - 2018 Past Year Paper - Question 23

The predominant mechanism of microRNA mediated regulation of gene expression is inhibition of  

Biological Science - 2018 Past Year Paper - Question 24

In human reproduction,
[P]  spermatogenesis starts at puberty
[Q] oogenesis starts at fetal stage
[R] following meiosis, one oogonium produces 4 eggs
[S] following meiosis, one spermatogonium produces 4 sperms

Which of the above statements are CORRECT?

Biological Science - 2018 Past Year Paper - Question 25


3’-Azido-2’,3’ dideoxy thymidine (AZT) with the structure shown above has potential to work as a drug against HIV because

Biological Science - 2018 Past Year Paper - Question 26

A bacterium that arose 3.5 billion years ago divides once every 12 hours. Under ideal conditions, the number of generations the bacterium has undergone will be approximately

Biological Science - 2018 Past Year Paper - Question 27

Which one of the following matches is CORRECT between the inhibitors given in Group A with their modes of action in Group B?

Biological Science - 2018 Past Year Paper - Question 28

During synthesis of N-linked glycosylated proteins in mammalian cells, which one of the following composition of sugars is originally added as a core through dolichol-phosphate precursor?

Biological Science - 2018 Past Year Paper - Question 29

For accurate determination of evolutionary relationship within elephants, an approach of choice would be to compare

Biological Science - 2018 Past Year Paper - Question 30

Which of the following combinations of the statements about photorespiration is CORRECT?
[P] Photorespiration generates no ATP
[Q] Photorespiration produces no glucose
[R] Photorespiration releases O2
[S] Photorespiration does not occur in C4 plants

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 31

Which of the following statements are TRUE for hexokinase and glucokinase?

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 32

Which of the following statements about mature tRNA and/or mRNA are FALSE?

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 33

Which of the following statements are CORRECT about meiosis?

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 34

Phospho-mimic mutants of proteins can be generated by replacing

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 35

Which of the following statements are TRUE for phosphoinositide signaling cascade?

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 36

A bacterial culture growing at 20 °C was shifted to 45 °C. Incorporation of which of the following fatty acids in the membrane will be beneficial for its survival?

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 37

The copy number of a plasmid in bacterial cells can be determined by  

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 38

Choose the CORRECT statements about a nucleosome core particle

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 39

Bacterial superantigens

*Multiple options can be correct
Biological Science - 2018 Past Year Paper - Question 40

When grown in the presence of glucose and lactose together, E. coli does not utilize lactose first because

*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 41

A plasmid is digested with a restriction enzyme to produce three fragments of sizes 7 kb, 3 kb and 2 kb. To obtain 500 ng of a 3 kb fragment, the amount of plasmid required to be digested in mg is _____ 


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 42

A pentapeptide consisting of amino acids with  molecular weights of 165, 131, 75, 204 and 146 Da has an approximate molecular weight (in Da) of _____


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 43

At 2 mg/mL pure tubulin concentration, a microtubule consisting of 13 protofilaments grows unidirectionally at a rate of about 2 µm/min. At this growth rate, the number of tubulin dimers (each 8 nm in length) added to the ends of the microtubule each second is ____ (decimal digits up to 2 places)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 44

Three sides of a triangle are 1, 1 and 0.5 meters in length. The area of the triangle in m2 is ______  (decimal digits up to 2 places)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 45

The sum of the internal angles of a regular pentagon is ____ degrees


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 46

A protein solution gives absorbance of 0.34 at λ280 using 0.5 cm path length cuvette. Given the extinction coefficient of the protein is 3.4 × 103 M-1 cm-1, the concentration of protein in the solution in mM is _______  (decimal digits up to 2 places)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 47

The pitch of an a-helix is 5.4 Å. The approximate length of the a-helix consisting of 15 amino acids in Å is ______ (decimal digits up to 1 place)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 48

The maximum resolution in nm achieved through an oil immersion lens of numerical aperture 1.4 using an incident light of wavelength 380 nm is _______ (decimal digits up to 2 places)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 49

The number of NADPH molecules required for the synthesis of palmitate (C16:0) from acetyl CoA is ____


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 50

The number of peptide fragments generated from the sequence: Ala-Trp-Val-Ala-Phe-Thr-Gly-LysGlu-Tyr-Asp-Ser-Lys on treatment with chymotrypsin is ___


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 51

The prevalence of a severe form of sickle-cell anemia (ss) in an African population is 16%. The percentage of the population resistant to malaria because of heterozygous (Ss) genotype for the sickle-cell gene is _____


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 52

The maximum velocity of an enzymatic reaction is 0.4 mole/sec. At 5 mM concentration of the substrate, the reaction velocity was found to be 0.2 mole/sec. If the enzyme shows standard Michaelis-Menten kinetics, the rate of the reaction at 10 mM substrate concentration in mole/sec is ____ (decimal digits up to 3 places)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 53

A chromatin fiber of 40 nm length contains 25 nucleosomes (200 bp per nucleosome). The degree of compaction of DNA associated with this chromatin fiber is  ___ fold (decimal digits up to 1 place)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 54

A ball is dropped from a height of 1 meter. Every time the ball bounces up, it reaches 50% of the height of the previous bounce (i.e., it rises up to 0.5 meters on the first bounce, 0.25 meters on the second bounce and so on). After an infinitely long time, the total distance covered by the ball in m is ___


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 55

(decimal digits up to 2 places)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 56

Ram’s mother is thrice his age now. Ten years from now, she will be twice his age. Ram’s present age is ____ years


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 57

An unbiased coin is tossed 4 times. The probability of getting exactly 2 heads and 2 tails in any order is _____   (decimal digits up to 2 places)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 58

Rod shaped E. coli is 2 μm long and has diameter of 0.8 μm. The average density of E. coli is 1.1 x 103 g/L. The mass of single E. coli cell in pg is _____ (decimal digits up to 1 place)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 59

The length of each side of a regular octagon is 1 meter. The area of the octagon in m2,  is  ____ (decimal digits up to 2 places)


*Answer can only contain numeric values
Biological Science - 2018 Past Year Paper - Question 60

Molecular weight of the genomic DNA of an organism is 3.96 × 109 g/mol. The average molecular weight of nucleotide pair is 660 g/mol. If an average protein in this organism consists of a chain of 400 amino acid, the maximum number of proteins coded by DNA molecule will be _____


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