IIT JAM Biotechnology 2024 Question Paper with Answer Key

Which one of the following is a simple tissue system in plants?

1. AEpidermis
2. BParenchyma
3. CPhloem
4. DXylem

In DNA replication, the Okazaki fragments are joined by

1. ADNA helicase
2. BDNA ligase
3. CDNA polymerase
4. DDNA primase

The most abundant type of RNA in a metabolically active mammalian cell is

1. AmRNA
2. BrRNA
3. CsnoRNA
4. DtRNA

Which organelle in a eukaryotic cell is the site of electron transport chain?

1. AEndoplasmic reticulum
2. BGolgi apparatus
3. CMitochondrion
4. DPeroxisome

RNA is a polymer of

1. Aglycosides
2. Bribonucleosides
3. Cribonucleotides
4. Driboses

Which one of the following is present in a bacterial cell?

1. A28S rRNA
2. B70S ribosome
3. CChitinous cell wall
4. DHistones

Which color of light excites a natural GFP to emit green fluorescence?

1. ABlue
2. BGreen
3. CInfrared
4. DRed

Which one of the following hormones promotes fruit ripening?

1. AAbscisic acid
2. BAuxin
3. CEthylene
4. DGibberellin

Which one of the following has a catalytic RNA?

1. ARibonuclease H
2. BRibozyme
3. CRNA polymerase I
4. DRNA polymerase II

The number of significant figures in a reported measurement of 0.00361 is

1. A3
2. B4
3. C5
4. D6

Match the terminology in Group I with the stimulus in Group II that generates growth response of plants

1. AP – 3, Q – 4, R – 2, S – 1
2. BP – 2, Q – 1, R – 3, S – 4
3. CP – 4, Q – 1, R – 2, S – 3
4. DP – 4, Q – 2, R – 1, S – 3

The correct hierarchy of taxa in the Linnaean classification of eukaryotes is

1. Akingdom, class, phylum, order, family, genus
2. Bkingdom, order, class, phylum, family, genus
3. Ckingdom, phylum, order, family, class, genus
4. Dkingdom, phylum, class, order, family, genus

Which one of the following statements about polyploidy is correct?

1. AAutopolyploids are derived from a single species
2. BAutopolyploids are derived from two different species
3. CAllopolyploids are derived from a single species
4. DAllopolyploids are not fertile when mated with each other

Which one of the following hormones is a tyrosine derivative?

1. AEpinephrine
2. BEstradiol
3. CProgesterone
4. DTestosterone

Which one of the following immunoglobulins crosses the human placenta?

1. AIgA
2. BIgE
3. CIgG
4. DIgM

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].

Assertion [a]: The resolving power of a transmission electron microscope is higher than that of the light microscope.

Reason [r]: The wavelength of electrons is shorter than that of visible light.

1. ABoth [a] and [r] are true and [r] is the correct reason for [a]
2. BBoth [a] and [r] are true but [r] is not the correct reason for [a]
3. CBoth [a] and [r] are false
4. D[a] is true but [r] is false

Match the morphology in Group I with the corresponding microorganism in Group II

1. AP – 3, Q – 2, R – 4, S – 1
2. BP – 4, Q – 1, R – 3, S – 2
3. CP – 2, Q – 4, R – 1, S – 3
4. DP – 1, Q – 2, R – 3, S – 4

Which one of the following genetic crosses and their results indicates cytoplasmic inheritance?

1. AWild-type male × mutant female → 100% progeny are mutant
2. BWild-type male × mutant female → 25% progeny are wild-type
3. CMutant male × wild-type female → 50% progeny are mutant
4. DMutant male × wild-type female → 75% progeny are wild-type

Which of the following is NOT a characteristic morphological feature of apoptotic cells?

1. ADisassembly of nuclear envelope
2. BDNA fragmentation
3. CIncreased cell size
4. DMembrane blebbing

Competition between two populations in an ecosystem is

1. Abeneficial (+) to both the populations
2. Bdeleterious (−) to both the populations
3. Cbeneficial (+) to one population, but deleterious (−) to the other population
4. Dbeneficial (+) to one population, but no effect (0) on the other population

Adenine constitutes 0.16 mole fraction in a given single-stranded DNA. What is the mole fraction of uracil in the resultant RNA, if this entire DNA fragment is transcribed?

1. A0.16
2. B0.32
3. C0.34
4. D0.68

Which one of the following is NOT used as a component in subunit vaccines?

1. ACapsular polysaccharide
2. BInactivated exotoxin
3. CInactivated virus
4. DViral glycoprotein

Metabolic acidosis is associated with decreased plasma level of

1. Abicarbonate
2. Blactate
3. Coxygen
4. Durea

Genes in two species that are derived from the same ancestral gene in their most recent common ancestor are called

1. Aanalogs
2. Bheterologs
3. Corthologs
4. Dparalogs

An object is placed 15 cm in front of a convex mirror, which has a radius of curvature 30 cm. Which one of the following is true of the image formed?

1. AReal and inverted
2. BReal and upright
3. CVirtual and inverted
4. DVirtual and upright

If a variable z shows a standard normal distribution, then the percent probability that 0 ≤ z² ≤ 1 is ___________ (rounded off to the nearest integer).

1. A34
2. B68
3. C95
4. D99

In chick embryo, the ectoderm generates

1. Aalveolar cells
2. Bgerm cells
3. Cneurons
4. Dred blood cells

The boiling points of Iodomethane, Dibromomethane, Bromomethane, Chloromethane follow the order

1. ABromomethane > Dibromomethane > Iodomethane > Chloromethane
2. BBromomethane > Iodomethane > Chloromethane > Dibromomethane
3. CDibromomethane > Iodomethane > Bromomethane > Chloromethane
4. DIodomethane > Bromomethane > Chloromethane > Dibromomethane

Chromosome duplication during the cell cycle occurs in

1. AG₁ phase
2. BG₂ phase
3. CM phase
4. DS phase

Ionic character of the covalent bonds in the compounds Cl₂, HCl, NaCl, NaF follows the order

1. ACl₂ > NaCl > HCl > NaF
2. BHCl > Cl₂ > NaF > NaCl
3. CHCl > NaCl > NaF > Cl₂
4. DNaF > NaCl > HCl > Cl₂

Which of the following is/are lateral meristems?

1. ACork cambium
2. BProcambium
3. CProtoderm
4. DVascular cambium

Which of the following statement(s) about Golden Rice is/are correct?

1. AConsumption of it increases vitamin A levels
2. BConsumption of it increases vitamin D levels
3. CConsumption of it increases vitamin K levels
4. DIt is a transgenic crop containing β-carotene

Which of the following statement(s) about eukaryotic DNA topoisomerase is/are correct?

1. ATopoisomerase I creates transient single-strand breaks
2. BTopoisomerase I creates transient double-strand breaks
3. CTopoisomerase II creates transient single-strand breaks
4. DTopoisomerase II creates transient double-strand breaks

Which of the following method(s) is/are used to estimate protein concentration?

1. AAnthrone
2. BBiuret
3. CBradford
4. DLowry

Which of the following is/are example(s) of a lotic ecosystem?

1. ALake
2. BPond
3. CRiver
4. DStream

Which of the following statement(s) about the effect of genetic drift is/are correct?

1. AIt can cause changes in the frequency of alleles at random
2. BIt is a mechanism of evolution
3. CIt can lead to loss of genetic variation within small populations
4. DIt is significant in large populations

Which of the following technique(s) can be used to determine the three-dimensional structure of an organic compound?

1. AMass spectrometry
2. BNMR spectroscopy
3. CUV-visible spectroscopy
4. DX-ray crystallography

Which of the following entity(ies) is/are found inside the intact nucleus of eukaryotic cells?

1. ACentrosome
2. BLysosome
3. CNucleolus
4. DNucleosome

Which of the following is/are trace element(s)?

1. AMn
2. BP
3. CS
4. DZn

Which of the following is/are true about Retrovirus?

1. AIt contains double-stranded RNA genome
2. BIt can cause cancer
3. CIt contains reverse transcriptase
4. DIt contains double-stranded DNA genome

A wooden plant accumulates 10 mg kg⁻¹ of ¹⁴C during its life span. A fossil of this plant was discovered and contains 2.5 mg kg⁻¹ of ¹⁴C. The age of this fossil at the time of discovery is __________ years (rounded off to the nearest integer).

(Use 5730 years as half-life of ¹⁴C)

Type a number as your answer.

A cylinder contains 50 L of an ideal gas at a pressure of 50 atm. Assuming that the temperature remains unchanged, the volume of the gas at 1 atm is __________ L (rounded off to the nearest integer).

Type a number as your answer.

One molecule of the protein myoglobin contains one atom of iron. A myoglobin sample was found to contain 0.34% iron. The molecular weight of myoglobin is __________ g mol⁻¹ (rounded off to the nearest integer).

(Use 55.9 g mol⁻¹ as atomic mass of iron)

Type a number as your answer.

The wavelength of visible light for the green color is 600 nm. The energy of photons of this color is __________ eV (rounded off to one decimal place).

(Planck’s constant = 6.63 × 10⁻³⁴ J s, 1 eV = 1.6 × 10⁻¹⁹ J, speed of light = 3 × 10⁸ m s⁻¹)

Type a number as your answer.

A ball dropped from a bridge hits the surface of the water in 3 s. The height of the bridge, ignoring air resistance, is __________ m (rounded off to one decimal place).

(Use g = 9.8 m s⁻²)

Type a number as your answer.

For a given square, if the area of its incircle is 100 cm², then the area of its circumcircle is __________ cm² (rounded off to the nearest integer).

Type a number as your answer.

The number of peaks in the ¹H NMR spectrum of methoxymethane (CH₃OCH₃) is __________.

Type a number as your answer.

The amount of agarose required to prepare 250 mL of 0.8% agarose gel is __________ grams (rounded off to the nearest integer).

Type a number as your answer.

Three genes x, y, and z are located on a chromosome in a linear order. If the recombination frequencies between x and y is 0.15, and between y and z is 0.10, then the expected frequency of double crossovers is __________ (rounded off to three decimal places).

Type a number as your answer.

A bacterial cell suspension contains 2 × 10⁵ cells mL⁻¹. The volume of this suspension required to obtain 1.4 × 10⁶ cells is __________ mL (rounded off to the nearest integer).

Type a number as your answer.

The data provided in the table were obtained from the following reaction, carried out at 273 K.

A + B → C

The order of the reaction with respect to A is __________.

Type a number as your answer.

Ammonia is synthesized in the Haber process in the following reaction.

N₂(g) + 3H₂(g) → 2NH₃(g)

The temperature above which the reaction becomes spontaneous is __________ K (rounded off to one decimal place).

(ΔH⁰ = −92.2 kJ, ΔS⁰ = −199 J K⁻¹)

Type a number as your answer.

In the given molecule,

the number of chiral centers is __________.

Type a number as your answer.

Two resistors 2 Ω and 4 Ω are combined in parallel. If this combination is connected to a battery of 16 V, the maximum current that can be drawn from the battery is __________ A (rounded off to the nearest integer).

Type a number as your answer.

A box of mass 20 kg is pulled at constant speed across a floor by a rope. The rope makes an angle of 45° with the horizontal. Assuming that friction is negligible, the work done in pulling the box by a distance of 20 m is __________ J (rounded off to the nearest integer).

(Use g = 9.8 m s⁻²)

Type a number as your answer.

Consider an enzyme that follows simple Michaelis-Menten kinetics, and has a K_M of 5 μM. The initial velocity of the reaction will be 10% of the maximum velocity at a substrate concentration of __________ μM (rounded off to two decimal places).

Type a number as your answer.

The value of lim_x→3 (x² − 9) / (x² − 4x + 3) is __________ (rounded off to the nearest integer).

Type a number as your answer.

A population of 1000 plants are in Hardy-Weinberg equilibrium. Two alleles R and r determine a particular trait in this population. If the number of plants with RR genotype is 640, Rr genotype is 320 and rr genotype is 40, the frequency of r allele (in percentage) in this population is __________ (rounded off to the nearest integer).

Type a number as your answer.

If a fair coin is tossed two times, the probability that the first or the second toss will be heads is __________ (rounded off to two decimal places).

Type a number as your answer.

The restriction map of a circular plasmid is shown below, along with the indicated distances between the restriction sites.

The plasmid was completely digested with EcoRI, and XhoI. The products were analysed by agarose gel electrophoresis followed by ethidium bromide staining. The number of bands that will be visible in the gel when exposed to UV light is __________.

Type a number as your answer.