Among the following, the one that is not a greenhouse gas is
a.
Nitrous oxide
b.
Methane
c.
Ozone
d.
Sulphur dioxide
Correct Answer
Step-by-Step AI Explanation
Verified Method
Nitrous oxide, methane and ozone are greenhouse gases; sulphur dioxide is not.
Q54mcq
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:
a.
Be
b.
Mg
Correct Answer
c.
Ca
d.
Sr
Step-by-Step AI Explanation
Verified Method
Mg²⁺ is the common cofactor required by ATP-dependent phosphate-transfer enzymes.
Q85mcq
A compound is formed by cation C and anion A. The anions form a hexagonal close packed (hcp) lattice and the cations occupy 75% of octahedral voids. The formula of the compound is:
a.
C2A3
b.
C3A2
Correct Answer
c.
C3A4
d.
C4A3
Step-by-Step AI Explanation
Verified Method
For hcp anions, the number of octahedral voids equals the number of anions. If 75% of octahedral voids are occupied, cations = 3/4 of anions. Thus the ratio C:A = 3:4? But the options suggest the intended standard crystal-defect relation is 75% occupancy of octahedral voids in close packing giving C3A4. However, as written, the stoichiometric ratio is C3A4.
Q88mcq
The method used to remove temporary hardness of water is:
a.
Calgon's method
b.
Clark's method
Correct Answer
c.
Ion-exchange method
d.
Synthetic resins method
Step-by-Step AI Explanation
Verified Method
Temporary hardness due to bicarbonates is removed by Clark's method, which uses lime.
Q91mcq
The Earth Summit held in Rio de Janeiro in 1992 was called:
a.
to reduce CO2 emissions and global warming
b.
for conservation of biodiversity and sustainable utilization of its benefits
Correct Answer
c.
to assess threat posed to native species by invasive weed species
d.
for immediate steps to discontinue use of CFCs that were damaging the ozone layer
Step-by-Step AI Explanation
Verified Method
The Rio Earth Summit focused on global sustainable development, biodiversity conservation, and sustainable use of biological resources.
Q91mcq
The Earth Summit held in Rio de Janeiro in 1992 was called
a.
to reduce CO2 emissions and global warming
b.
for conservation of biodiversity and sustainable utilization of its benefits
Correct Answer
c.
to assess threat posed to native species by invasive weed species
d.
for immediate steps to discontinue use of CFCs that were damaging the ozone layer
Step-by-Step AI Explanation
Verified Method
The Rio Earth Summit (1992) focused on biodiversity conservation and sustainable use of biological resources.
Q92mcq
Colostrum, the yellowish fluid secreted by mother during the initial days of lactation, is very essential to impart immunity to the new born infants because it contains:
a.
Natural killer cells
b.
Monocytes
c.
Macrophages
d.
Immunoglobulin A
Correct Answer
Step-by-Step AI Explanation
Verified Method
Colostrum is rich in antibodies, especially IgA, which provides passive immunity to the newborn.
Q92mcq
Colostrum, the yellowish fluid secreted by the mother during the initial days of lactation, is very essential to impart immunity to the newborn infant because it contains:
a.
Natural killer cells
b.
Monocytes
c.
Macrophages
d.
Immunoglobulin A
Correct Answer
Step-by-Step AI Explanation
Verified Method
Colostrum is rich in IgA, which provides passive immunity to the newborn.
Q93mcq
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:
a.
Closure of stomata
b.
Flaccidity of bulliform cells
Correct Answer
c.
Shrinkage of air spaces in spongy mesophyll
d.
Tyloses in vessels
Step-by-Step AI Explanation
Verified Method
Bulliform cells lose turgidity in dry conditions, causing the grass leaf to roll inward and reduce transpiration.
Q93mcq
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:
a.
Closure of stomata
b.
Flaccidity of bulliform cells
Correct Answer
c.
Shrinkage of air spaces in spongy mesophyll
d.
Tyloses in vessels
Step-by-Step AI Explanation
Verified Method
In grasses, bulliform cells lose turgor in dry conditions, causing inward rolling of leaves to reduce water loss.
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Match the following structures with their respective location in organs:
(a) Crypts of Lieberkuhn
(b) Glisson's capsule
(c) Islets of Langerhans
(d) Brunner's glands
Select the correct option from the following:
a.
(a) (iii) (i) (ii) (iv)
b.
(a) (ii) (iv) (i) (iii)
c.
(a) (iii) (iv) (i) (ii)
d.
(a) (iii) (ii) (i) (iv)
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Consider the following features:
(a) Organ system level of organisation
(b) Bilateral symmetry
(c) True coelomates with segmentation of body
Select the correct option of animal groups which possess all the above characteristics.
a.
Annelida, Arthropoda and Chordata
b.
Annelida, Arthropoda and Mollusca
c.
Arthropoda, Mollusca and Chordata
d.
Annelida, Mollusca and Chordata
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Match Column-I with Column-II:
(a) P-wave
(b) QRS complex
(c) T-wave
(d) Reduction in the size of T-wave
Column-II:
(i) Depolarisation of ventricles
(ii) Repolarisation of ventricles
(iii) Coronary ischemia
(iv) Depolarisation of atria
(v) Repolarisation of atria
Select the correct option.
a.
(iv) (i) (ii) (iii)
b.
(iv) (i) (ii) (v)
c.
(ii) (i) (v) (iii)
d.
(ii) (iii) (v) (iv)
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In a species, the weight of newborn ranges from 2 to 5 kg. 97% of the newborn with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weight from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?
a.
Directional Selection
b.
Stabilizing Selection
c.
Disruptive Selection
d.
Cyclical Selection
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In a species, the weight of newborns ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive, whereas 99% of the infants born with weight from 2 to 2.5 kg or 4.5 to 5 kg die. Which type of selection process is taking place?
a.
Directional selection
b.
Stabilizing selection
c.
Disruptive selection
d.
Cyclical selection
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Consider the following statements: (A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group. (B) A complete catalytically active enzyme with its bound prosthetic group is called apoenzyme. Select the correct option.
a.
Both (A) and (B) are true.
b.
(A) is true but (B) is false.
c.
Both (A) and (B) are false.
d.
(A) is false but (B) is true.
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Match the hominids with their correct brain size: (a) Homo habilis, (b) Homo neanderthalensis, (c) Homo erectus, (d) Homo sapiens. Brain sizes: (i) 900 cc, (ii) 1350 cc, (iii) 650-800 cc, (iv) 1400 cc. Select the correct option.
a.
(a) (iii), (b) (i), (c) (iv), (d) (ii)
b.
(a) (iii), (b) (ii), (c) (i), (d) (iv)
c.
(a) (iii), (b) (iv), (c) (i), (d) (ii)
d.
(a) (iv), (b) (iii), (c) (i), (d) (ii)
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Match the following organisms with the products they produce:
(a) Lactobacillus
(b) Saccharomyces cerevisiae
(c) Aspergillus niger
(d) Acetobacter aceti
Select the correct option.
a.
(a)-(ii), (b)-(iv), (c)-(v), (d)-(iii)
b.
(a)-(ii), (b)-(iv), (c)-(iii), (d)-(v)
c.
(a)-(iii), (b)-(iv), (c)-(v), (d)-(i)
d.
(a)-(ii), (b)-(i), (c)-(iii), (d)-(v)
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What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?
a.
50 beats per minute
b.
75 beats per minute
c.
100 beats per minute
d.
125 beats per minute
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Tidal volume and expiratory reserve volume of an athlete is 500 mL and 1000 mL, respectively. What will be his expiratory capacity if the residual volume is 1200 mL?
a.
1500 mL
b.
1700 mL
c.
2200 mL
d.
2700 mL
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From evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:
a.
Liverworts
b.
Mosses
c.
Pteridophytes
d.
Gymnosperms
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In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F1 generation pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers. Choose the incorrect statement from the following:
a.
This experiment does not follow the Principle of Dominance.
b.
Pink colour in F1 is due to incomplete dominance.
c.
Ratio of F2 is 1/4 (Red) : 2/4 (Pink) : 1/4 (White)
d.
Law of Segregation does not apply in this experiment
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A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
a.
0.36(AA); 0.48(Aa); 0.16(aa)
b.
0.16(AA); 0.24(Aa); 0.36(aa)
c.
0.16(AA); 0.48(Aa); 0.36(aa)
d.
0.16(AA); 0.36(Aa); 0.48(aa)
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A gene locus has two alleles A and a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?
a.
0.36 (AA); 0.48 (Aa); 0.16 (aa)
b.
0.16 (AA); 0.24 (Aa); 0.36 (aa)
c.
0.16 (AA); 0.48 (Aa); 0.36 (aa)
d.
0.16 (AA); 0.36 (Aa); 0.48 (aa)
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Match Column I with Column II:
(a) Saprophyte
(b) Parasite
(c) Lichens
(d) Mycorrhiza
Column II:
(i) Symbiotic association of fungi with plant roots
(ii) Decomposition of dead organic materials
(iii) Living on living plants or animals
(iv) Symbiotic association of algae and fungi
Choose the correct answer from the options given below.
a.
(a) i, (b) ii, (c) iii, (d) iv
b.
(a) iii, (b) ii, (c) i, (d) iv
c.
(a) ii, (b) i, (c) iii, (d) iv
d.
(a) ii, (b) iii, (c) iv, (d) i
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Use of an artificial kidney during hemodialysis may result in:
(a) Nitrogenous waste build-up in the body
(b) Non-elimination of excess potassium ions
(c) Reduced absorption of calcium ions from gastro-intestinal tract
(d) Reduced RBC production
Which of the following options is the most appropriate?
a.
(a) and (b) are correct
b.
(b) and (c) are correct
c.
(c) and (d) are correct
d.
(a) and (d) are correct
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Match the following genes of the Lac operon with their respective products:
(a) i gene
(b) z gene
(c) a gene
(d) y gene
(i) beta-galactosidase
(ii) Permease
(iii) Repressor
(iv) Transacetylase
Select the correct option.
a.
(a) iii, (b) i, (c) ii, (d) iv
b.
(a) iii, (b) i, (c) ii, (d) iv
c.
(a) iii, (b) i, (c) iv, (d) ii
d.
(a) iii, (b) iv, (c) i, (d) ii
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It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
a.
Auxin and Ethylene
b.
Gibberellin and Cytokinin
c.
Gibberellin and Abscisic acid
d.
Cytokinin and Abscisic acid
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