Category: GATE Biotechnology 2018 Previous Year Papers with Solutions

Category: GATE Biotechnology 2018 Previous Year Papers with Solutions

GATE Biotechnology 2018 Previous Year Papers with Solutions

Q.30 Which one of the following plant secondary metabolites is a natural insecticide? (A) Digitoxin (B) Pyrethrin (C) Salicylic acid (D) Avenacin A-1

Plant Secondary Metabolites: Which is the Natural Insecticide?

Q.29 Which one of the following is the solution for cos²x + 2cosx + 1 = 0, for values of x in the range of 0° < x < 360°? (A) 45° (B) 90° (C) 180° (D) 270°

Solve cos²x + 2cosx + 1 = 0 for 0° < x < 360°

Q.28 Identify the character based method(s) used for the construction of a phylogenetic tree. P. Maximum parsimony Q. Neighbor joining R. Maximum likelihood S. Bootstrapping (A) Q only (B) P and R only (C) Q and S only (D) S o

Character-Based Methods for Phylogenetic Tree Construction

Q.27 Which one of the following techniques is used to monitor RNA transcripts, both temporally and spatially? (A) Northern blotting (B) In situ hybridization (C) Southern blotting (D) Western blotting

Monitor RNA Transcripts Temporally and Spatially

Q.26 Standard error is (A) the probability of a type I error in a statistical test (B) the error in estimating a sample standard deviation (C) the standard deviation of a variable that follows standard normal distribution (D) the standard deviation of distribution of sample means

Standard Error in Statistics

Q.25 Which one of the following statements is true for actin? (A) Actin filament is structurally polarized and the two ends are not identical (B) De novo actin polymerization is a single-step process (C) The pointed end of the actin filaments is the fast growing end (D) Actin forms spindle fibers during mitosis

Actin Filament Polarity

Q.24 Cell type A secretes molecule X into the culture medium. Cell type B in the same culture responds to the molecule X by expressing protein Y. Which one of the following modes of signaling represents the interaction between A and B? (A) Autocrine (B) Juxtacrine (C) Paracrine (D) Intracrine

Paracrine Signaling Explained

Q.23 Which one of the following bioreactor configurations is the basis for a trickling biological filter? (A) Stirred tank (B) Packed bed (C) Air lift (D) Fluidized bed

Packed Bed Explained

Q.22 Which of the following technique(s) can be used to study conformational changes in myoglobin? P. Mass spectrometry Q. Fluorescence spectroscopy R. Circular dichroism spectroscopy S. Light microscopy (A) P only (B) P and S only (C) Q and R only (D) S only

Techniques to Study Conformational Changes in Myoglobin

Q.21 Which one of the following is NOT a principal component of innate immunity? (A) Mucosal epithelia (B) Dendritic cells (C) Complement system (D) Memory B-cells

 Which Is NOT a Principal Component of Innate Immunity?

Q.20 Which one of the following metabolic processes in mammalian cells does NOT occur in the mitochondria? (A) Citric acid cycle (B) Oxidative phosphorylation (C) Fatty acid β-oxidation (D) Glycolysis

Which Metabolic Process Does NOT Occur in Mitochondria

Q.19 Which one of the following is INCORRECT about protein structures? (A) A protein fold is stabilized by favorable non-covalent interactions (B) All parts of a fold can be classified as helices, strands or turns (C) Two non-covalent atoms cannot be closer than the sum of their van der Waals radii (D) The peptide bond is nearly planar

Which Statement is INCORRECT About Protein Structures?

Q.18 A mixture contains three similarly sized peptides P, Q and R. The peptide P is positively charged, Q is weakly negative and R is strongly negative. If this mixture is passed through an ion-exchange chromatography column containing an anionic resin, their order of elution will be (A) P, Q, R (B) R, Q, P (C) Q, R, P (D) P, Q and R elute together

Ion-Exchange Chromatography

Q.17 Which one of the following BLAST search programs is used to identify homologs of a genomic DNA query in a protein sequence database? (A) blastp (B) blastn (C) blastx (D) tblastn

BLAST Search Programs

Q.16 Which of the following components constitute a molecular mechanics force field? P. Bond stretching Q. Bond angle bending R. Torsional bond rotation S. Non-bonded interactions (A) P and Q only (B) P, Q and R only (C) P, Q and S only (D) P, Q, R and S

Molecular Mechanics Force Field Components Explained

Q.15 Which one of the following is an example of a neurotoxin? (A) Cholera toxin (B) Streptolysin-O (C) Botulinum toxin (D) Diphtheria toxin

Which One of the Following is an Example of a Neurotoxin?

Q.14 If a segment of a sense strand of DNA is 5'-ATGGACCAGA-3', then the resulting RNA sequence after transcription is (A) 5'-AGACCAGGTA-3' (C) 5'-UACCUGGUCU-3' (B) 5'-UCUGGUCCAU-3' (D) 5'-AUGGACCAGA-3'

 Sense Strand DNA to RNA Transcription

Q.13 The repeat sequence of telomere in humans is (A) 5'-TATAAT-3' (B) 5'-TTAGGG-3' (C) 5'-GGGCCC-3' (D) 5'-AAAAAA-3'

 Human Telomere Repeat Sequence

Q.12 If serum is removed from the growth medium of human embryonic kidney cell line (HEK), then the cells will (A) proliferate faster (B) proliferate normally (C) undergo cell cycle arrest (D) undergo immediate apoptosis

Cell Cycle Arrest

Q.11 Consider an unfair coin. The probability of getting heads is 0.6. If you toss this coin twice, what is the probability that the first or the second toss is heads? (A) 0.56 (B) 0.64 (C) 0.84 (D) 0.96

Unfair Coin Probability

Q.10 In a detailed study of annual crow births in India, it was found that there was relatively no growth during the period 2002 to 2004 and a sudden spike from 2004 to 2005. In another unrelated study, it was found that the revenue from cracker sales in India which remained fairly flat from 2002 to 2004, saw a sudden spike in 2005 before declining again in 2006. The solid line in the graph below refers to annual sale of crackers and the dashed line refers to the annual crow births in India. Choose the most appropriate inference from the above data. (A) There is a strong correlation between crow birth and cracker sales. (B) Cracker usage increases crow birth rate. (C) If cracker sale declines, crow birth will decline. (D) Increased birth rate of crows will cause an increase in the sale of crackers.

Strong Correlation Between Crow Births and Cracker Sales

Q.9 If 𝑥2 + 𝑥 − 1 = 0 what is the value of 𝑥4 + 1/𝑥4 ? (A) 1          (B) 5         (C) 7         (D) 9

Solve x² + x – 1 = 0 to Find x⁴ + 1/x⁴ Value

Q.8 To pass a test, a candidate needs to answer at least 2 out of 3 questions correctly. A total of 6,30,000 candidates appeared for the test. Question A was correctly answered by 3,30,000 candidates. Question B was answered correctly by 2,50,000 candidates. Question C was answered correctly by 2,60,000 candidates. Both questions A and B were answered correctly by 1,00,000 candidates. Both questions B and C were answered correctly by 90,000 candidates. Both questions A and C were answered correctly by 80,000 candidates. If the number of students answering all questions correctly is the same as the number answering none, how many candidates failed to clear the test? (A) 30,000 (B) 2,70,000 (C) 3,90,000 (D) 4,20,000

Candidates Failed Test

Q.7 A set of 4 parallel lines intersect with another set of 5 parallel lines. How many parallelograms are formed? (A) 20  (B) 48   (C) 60   (D) 72

Number of Parallelograms Formed by Two Sets

Q.6 An automobile travels from city A to city B and returns to city A by the same route. The speed of the vehicle during the onward and return journeys were constant at 60 km/h and 90 km/h, respectively. What is the average speed in km/h for the entire journey? (A) 72 (B) 73 (C) 74 (D) 75

Average Speed Round Trip 60 km/h to 90 km/h

Q.5 Arrange the following three-dimensional objects in the descending order of their volumes: (i) A cuboid with dimensions 10 cm, 8 cm and 6 cm (ii) A cube of side 8 cm (iii) A cylinder with base radius 7 cm and height 7 cm (iv) A sphere of radius 7 cm (A) (i), (ii), (iii), (iv) (B) (ii), (i), (iv), (iii) (C) (iii), (ii), (i), (iv) (D) (iv), (iii), (ii), (i)

Arrange 3D Objects in Descending Order of Volume

Q.4 The area of an equilateral triangle is √3. What is the perimeter of the triangle? (A) 2 (B) 4 (C) 6 (D) 8

Area of Equilateral Triangle √3

Q.3 For 0 ≤ 𝑥 ≤ 2𝜋, sin 𝑥 and cos 𝑥 are both decreasing functions in the interval ________. (A) (0, π/2) (B) (π/2, π) (C) (π, 3π/2) (D) (3π/2, 2π)

Where Sin x and Cos x Both Decrease

Q.2 “In spite of being warned repeatedly, he failed to correct his _________ behaviour.” The word that best fills the blank in the above sentence is (A) rational (B) reasonable (C) errant (D) good

In Spite of Being Warned Repeatedly

Q.1 “When she fell down the _______, she received many _______ but little help.” The words that best fill the blanks in the above sentence are (A) stairs, stares (B) stairs, stairs (C) stares, stairs (D) stares, stares

Mastering “Stairs Stares” Sentence Completion

Latest Courses

IIT JAM / CUET- PG

IIT JAM / CUET- PG

Are you aspiring to crack the IIT JAM Biotechnology exam with flying colors? Choosing the right coaching institute is crucial for your success. Let's Talk Academy (LTA) has established itself as the best coaching institute for IIT JAM Biotechnology, helping students achieve their dreams through expert guidance, structured study material, and personalized mentorship.

CSIR UGC NET Life Science Course

CSIR UGC NET Life Science Course

Let's Talk Academy is the number one CSIR NET Life Science coaching in Jaipur for Life Science. At Let's Talk Academy, you can be sure to get the right coaching strictly in adherence to the CSIR NET Life Science course.  CSIR NET Life Science is an exam that requires in-depth knowledge, consistent practice, and the right guidance to crack. If you are looking for a place where you can get the best CSIR NET Life Science coaching, you are at the right place.

ICMR JRF Life Science

ICMR JRF Life Science

If you are serious about cracking the ICMR Life Science JRF exam, Let’s Talk Academy is your ultimate destination. Join now and take the first step toward a successful research career!