Mark a gene on a chromosome for isolation using restriction enzyme
b.
Help in eliminating the non-transformants, so that the transformants can be regenerated
Correct Answer
c.
Identify the gene for a desired trait in an alien organism
d.
Select a suitable vector for transformation in a specific crop
Step-by-Step AI Explanation
Verified Method
Selectable markers are genes that allow selection of transformants and elimination of non-transformants, commonly by providing resistance to antibiotics or other selective agents.
Q47mcq
Western Ghats have a large number of plant and animal species that are not found anywhere else. Which of the following terms will you use to notify such species?
a.
Keystone
b.
Endemic
Correct Answer
c.
Vulnerable
d.
Threatened
Step-by-Step AI Explanation
Verified Method
Species restricted to a particular geographic region and not found anywhere else are called endemic species.
Q48mcq
Which of the following statements about ozone is correct?
a.
Stratospheric ozone protects us from UV radiations
Correct Answer
b.
Tropospheric ozone protects us from UV radiations
c.
Stratospheric ozone is ‘bad’
d.
Tropospheric ozone is ‘good’
Step-by-Step AI Explanation
Verified Method
Ozone in the stratosphere absorbs harmful UV radiation and is therefore called good ozone, while tropospheric ozone acts as a pollutant.
Q48mcq
Which of the following statements about ozone is correct?
a.
Stratospheric ozone protects us from UV radiations
Correct Answer
b.
Tropospheric ozone protects us from UV radiations
c.
Stratospheric ozone is 'bad'
d.
Tropospheric ozone is 'good'
Step-by-Step AI Explanation
Verified Method
Ozone in the stratosphere is the 'good ozone' layer that absorbs harmful UV radiation. Ozone in the troposphere acts as a pollutant.
Q49mcq
Exploration of molecular, genetic and species level diversity for novel products of economic importance is known as:
a.
Bioprospecting
Correct Answer
b.
Biopiracy
c.
Bioenergetics
d.
Bioremediation
Step-by-Step AI Explanation
Verified Method
Bioprospecting means exploring biodiversity at molecular, genetic and species levels for products of economic importance.
Q49mcq
Exploration of molecular, genetic and species level diversity for novel products of economic importance is known as:
a.
Bioprospecting
Correct Answer
b.
Biopiracy
c.
Bioenergetics
d.
Bioremediation
Step-by-Step AI Explanation
Verified Method
Bioprospecting means exploring biodiversity at molecular, genetic and species levels to discover useful products of economic value.
Q50mcq
Which of the following is an innovative remedy for plastic waste?
a.
Electrostatic precipitator
b.
Burning in the absence of oxygen
c.
Burying 500 m deep below soil surface
d.
Polyblend
Correct Answer
Step-by-Step AI Explanation
Verified Method
Polyblend is a fine powder of recycled plastic waste mixed with bitumen and used for road laying, making it an innovative remedy for plastic waste.
Q50mcq
Which of the following is an innovative remedy for plastic waste?
a.
Electrostatic precipitator
b.
Burning in the absence of oxygen
c.
Burying 500 m deep below soil surface
d.
Polyblend
Correct Answer
Step-by-Step AI Explanation
Verified Method
Polyblend is a recycled plastic powder mixed with bitumen for road laying, and is used as an innovative remedy for plastic waste.
Q51mcq
Between which among the following, the relationship is not an example of commensalism?
a.
Female wasp and fig species
Correct Answer
b.
Orchid and the tree on which it grows
c.
Cattle egret and grazing cattle
d.
Sea anemone and clown fish
Step-by-Step AI Explanation
Verified Method
Female wasp and fig species show mutualism, not commensalism. The other pairs are standard examples of commensalism.
Q52mcq
If an agricultural field is liberally irrigated for a prolonged period of time, it is likely to face a problem of:
a.
Salinity
Correct Answer
b.
Metal toxicity
c.
Alkalinity
d.
Acidity
Step-by-Step AI Explanation
Verified Method
Prolonged irrigation without proper drainage causes waterlogging and rise of salts to the surface, leading to salinity.
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Given below are four statements pertaining to separation of DNA fragments using gel electrophoresis. Identify the incorrect statements.
(a) DNA is a negatively charged molecule and so it is loaded on gel towards the anode terminal.
(b) DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA.
(c) Smaller the size of DNA fragment, larger is the distance it travels through it.
(d) Pure DNA can be visualized directly by exposing to UV radiation.
Choose the correct answer from the options given below:
a.
(a), (b) and (d)
b.
(a), (c) and (d)
c.
(a), (b) and (c)
d.
(b), (c) and (d)
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One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:
a.
Blue and red light
b.
Violet and green light
c.
Indigo and green light
d.
Orange and yellow light
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Match the placental types (column I) with their examples (column II).
Column I: (a) Basal, (b) Axile, (c) Parietal, (d) Free central
Column II: (i) Mustard, (ii) China rose, (iii) Dianthus, (iv) Sunflower
Choose the correct answer from the following options:
a.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
b.
(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
c.
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
d.
(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
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Match the column I with column II.
Column I: (a) Golgi apparatus, (b) Lysosomes, (c) Vacuoles, (d) Ribosomes
Column II: (i) Synthesis of protein, (ii) Trap waste and excretory products, (iii) Formation of glycoproteins and glycolipids, (iv) Digesting biomolecules
Choose the right match from options given below:
a.
(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
b.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
c.
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
d.
(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
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Match the organisms in Column I with habitats in Column II.
Column I Column II
(a) Halophiles (i) Hot springs
(b) Thermoacidophiles (ii) Aquatic environment
(c) Methanogens (iii) Guts of ruminants
(d) Cyanobacteria (iv) Salty areas
Select the correct answer from the options given below:
a.
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
b.
(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
c.
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
d.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
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Match the organisms in Column I with habitats in Column II.
Column I: (a) Halophiles, (b) Thermoacidophiles, (c) Methanogens, (d) Cyanobacteria.
Column II: (i) Hot springs, (ii) Aquatic environment, (iii) Guts of ruminants, (iv) Salty areas.
Select the correct answer from the options given below:
a.
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
b.
(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
c.
(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
d.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
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Match the following enzymes with their functions:
(a) Restriction endonuclease
(b) Restriction exonuclease
(c) DNA ligase
(d) Taq polymerase
Functions: (i) Joins the DNA fragments, (ii) Extends primers on genomic DNA template, (iii) Cuts DNA at specific position, (iv) Removes nucleotides from the ends of DNA.
Select the correct option from the following:
a.
a(ii), b(iv), c(i), d(iii)
b.
a(iii), b(i), c(iv), d(ii)
c.
a(iii), b(iv), c(i), d(ii)
d.
a(iv), b(iii), c(i), d(ii)
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Carnivorous animals like lions and leopards occupy the same niche, but lions prey mostly on larger animals and leopards on smaller ones. This mechanism of competition is referred to as
a.
Competitive exclusion
b.
Character displacement
c.
Altruism
d.
Resource partitioning
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Match the following RNA polymerases with their transcribed products:
(a) RNA polymerase I
(b) RNA polymerase II
(c) RNA polymerase III
(i) tRNA
(ii) rRNA
(iii) hnRNA
Select the correct option from the following:
a.
(a)-(iii), (b)-(ii), (c)-(i)
b.
(a)-(i), (b)-(iii), (c)-(ii)
c.
(a)-(i), (b)-(ii), (c)-(iii)
d.
(a)-(ii), (b)-(iii), (c)-(i)
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In a marriage between a male with blood group A and a female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of the parents?
a.
Iᴬi (Male); Iᴮi (Female)
b.
Iᴬi (Male); IᴮIᴮ (Female)
c.
IᴬIᴬ (Male); IᴮIᴮ (Female)
d.
IᴬIᴬ (Male); Iᴮi (Female)
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Humans have acquired immune system that produces antibodies to neutralize pathogens. Still innate immune system is present at the time of birth because it
a.
provides passive immunity
b.
is very specific and uses different macrophages
c.
produces memory cells for mounting fast secondary response
d.
has natural killer cells which can phagocytose and destroy microbes
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Match the items of Column-I with Column-II:
(a) XX-XO method of sex determination
(b) XX-XY method of sex determination
(c) Karyotype-45
(d) ZW-ZZ method of sex determination
Column-II:
(i) Turner's syndrome
(ii) Female heterogametic
(iii) Grasshopper
(iv) Female homogametic
Select the correct option from the following:
a.
(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
b.
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
c.
(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
d.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
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Match the following joints with the bones involved:
(a) Gliding joint
(b) Hinge joint
(c) Pivot joint
(d) Saddle joint
(i) Between carpal and metacarpal of thumb
(ii) Between atlas and axis
(iii) Between the carpals
(iv) Between humerus and ulna
Select the correct option from the following:
a.
(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
b.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
c.
(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
d.
(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
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A specialised nodal tissue embedded in the lower corner of the right atrium, close to the atrioventricular septum, delays the spreading of impulses to the heart apex for about 0.1 s. This delay allows:
a.
the atria to empty completely.
b.
blood to enter aorta.
c.
the ventricles to empty completely.
d.
blood to enter pulmonary arteries.
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Match the following parts of a nephron with their function:
(a) Descending limb of Henle's loop
(b) Proximal convoluted tubule
(c) Ascending limb of Henle's loop
(d) Distal convoluted tubule
(i) Reabsorption of salts only
(ii) Reabsorption of water only
(iii) Conditional reabsorption of sodium ions and water
(iv) Reabsorption of ions, water and organic nutrients
Select the correct option from the following:
a.
(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
b.
(a)-(i), (b)-(iii), (c)-(ii), (d)-(iv)
c.
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
d.
(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)
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Match the items in Column-I with those in Column-II:
Column-I
(a) Podocytes
(b) Protonephridia
(c) Nephridia
(d) Renal calculi
Column-II
(i) Crystallised oxalates
(ii) Annelids
(iii) Amphioxus
(iv) Filtration slits
Select the correct option from the following:
a.
(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
b.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
c.
(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
d.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
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Match the items given in Column-I with those in Column-II and choose the correct option.
Column-I Column-II
(a) Rennin (i) Vitamin B12
(b) Enterokinase (ii) Facilitated transport
(c) Oxyntic cells (iii) Milk proteins
(d) Fructose (iv) Trypsinogen
a.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
b.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
c.
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
d.
(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
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Match the following genera with their respective phylum:
(a) Ophiura (i) Mollusca
(b) Physalia (ii) Platyhelminthes
(c) Pinctada (iii) Echinodermata
(d) Planaria (iv) Coelenterata
Select the correct option:
a.
(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
b.
(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
c.
(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
d.
(a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
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Match the following cell structures with their characteristic features:
(a) Tight junctions
(b) Adhering junctions
(c) Gap junctions
(d) Synaptic junctions
Select the correct option from the following:
a.
(a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
b.
(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)
c.
(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
d.
(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
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The rate of radioactive disintegration at an instant for a radioactive sample of half-life 2.2 × 10^9 s is 10^10 s^-1. The number of radioactive atoms in that sample at that instant is:
a.
3.17 × 10^19
b.
3.17 × 10^20
c.
3.17 × 10^17
d.
3.17 × 10^18
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