Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?
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N2O, NO, and NO2 are common pollutants from natural (soil, lightning) and human activities. N2O5 is not commonly released into the atmosphere as a primary pollutant.
Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
a.
Decreased respiratory surface; Inflammation of bronchioles
b.
Inflammation of bronchioles; Decreased respiratory surface
Correct Answer
c.
Increased respiratory surface; Inflammation of bronchioles
d.
Increased number of bronchioles; Increased respiratory surface
Step-by-Step AI Explanation
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Asthma is characterized by inflammation of bronchi and bronchioles, while emphysema involves the damage of alveolar walls leading to a decreased respiratory surface area.
Match the items given in Column I with those in Column II and select the correct option given below:
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Tricuspid valve is between right atrium and right ventricle (a-iii). Bicuspid is between left atrium and left ventricle (b-i). Semilunar is between right ventricle and pulmonary artery (c-ii).
The transparent lens in the human eye is held in its place by
a.
smooth muscles attached to the ciliary body
b.
ligaments attached to the ciliary body
Correct Answer
c.
smooth muscles attached to the iris
d.
ligaments attached to the iris
Step-by-Step AI Explanation
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The lens is suspended in the eye by suspensory ligaments, which are attached to the ciliary body.
Which of the following is an amino acid derived hormone?
b.
Epinephrine
Correct Answer
Step-by-Step AI Explanation
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Epinephrine (adrenaline) is an amino acid derivative (derived from tyrosine), while Estriol and Estradiol are steroid hormones.
Which of the following structures or regions is incorrectly paired with its function?
a.
Corpus callosum : band of fibers connecting left and right cerebral hemispheres.
b.
Medulla oblongata : controls respiration and cardiovascular reflexes.
c.
Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst.
d.
Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.
Correct Answer
Step-by-Step AI Explanation
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The limbic system is primarily involved in regulating emotions, sexual behavior, and motivation, not in controlling movement (which is largely the function of the cerebellum and basal ganglia).
Which of the following hormones can play a significant role in osteoporosis?
a.
Parathyroid hormone and Prolactin
b.
Aldosterone and Prolactin
c.
Estrogen and Parathyroid hormone
Correct Answer
d.
Progesterone and Aldosterone
Step-by-Step AI Explanation
Verified Method
Decreased levels of estrogen in postmenopausal women and increased levels of parathyroid hormone (which removes calcium from bones) are both major contributors to osteoporosis.
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
b.
AGGUAUCGCAU
Correct Answer
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The mRNA sequence is identical to the coding strand except that Thymine (T) is replaced by Uracil (U). Thus, AGGTATCGCAT becomes AGGUAUCGCAU.
AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
b.
AGGUAUCGCAU
Correct Answer
Step-by-Step AI Explanation
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The coding strand sequence is identical to the mRNA sequence except that Thymine (T) in DNA is replaced by Uracil (U) in RNA. Replacing T with U in AGGTATCGCAT gives AGGUAUCGCAU.
Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Proliferative Phase, b. Secretory Phase, c. Menstruation
Column II: i. Breakdown of endometrial lining, ii. Follicular Phase, iii. Luteal Phase
c.
(3) ii iii i
Correct Answer
Step-by-Step AI Explanation
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Proliferative phase is the Follicular phase (ii), Secretory phase is the Luteal phase (iii), and Menstruation involves the breakdown of the endometrial lining (i).
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All of the following are part of an operon except
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All of the following are part of an operon except
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According to Hugo de Vries, the mechanism of evolution is
b.
Multiple step mutations
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According to Hugo de Vries, the mechanism of evolution is
b.
Multiple step mutations
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A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
a.
Both sons and daughters
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A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
a.
Both sons and daughters
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In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
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Among the following sets of examples for divergent evolution, select the incorrect option:
a.
Eye of octopus, bat and man
b.
Forelimbs of man, bat and cheetah
c.
Brain of bat, man and cheetah
d.
Heart of bat, man and cheetah
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Conversion of milk to curd improves its nutritional value by increasing the amount of
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Which of the following is not an autoimmune disease?
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The similarity of bone structure in the forelimbs of many vertebrates is an example of
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Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
a. Dominance, b. Co-dominance, c. Multiple allele, d. Incomplete dominance, e. Polygenic inheritance
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Eutrophication, b. Sanitary landfill, c. Snow blindness, d. Jhum cultivation
Column II: i. UV-B radiation, ii. Deforestation, iii. Nutrient enrichment, iv. Waste disposal
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All of the following are included in ‘Ex-situ conservation’ except
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Which one of the following population interactions is widely used in medical science for the production of antibiotics?
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In a growing population of a country,
a.
pre-reproductive individuals are less than the reproductive individuals.
b.
pre-reproductive individuals are more than the reproductive individuals.
c.
reproductive and pre-reproductive individuals are equal in number.
d.
reproductive individuals are less than the post-reproductive individuals.
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Which part of poppy plant is used to obtain the drug ‘Smack’?
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Hormones secreted by the placenta to maintain pregnancy are
a.
hCG, progestogens, estrogens, glucocorticoids
b.
hCG, hPL, progestogens, prolactin
c.
hCG, hPL, progestogens, estrogens
d.
hCG, hPL, estrogens, relaxin, oxytocin
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The amnion of mammalian embryo is derived from
c.
mesoderm and trophoblast
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The amnion of mammalian embryo is derived from
c.
mesoderm and trophoblast
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The contraceptive ‘SAHELI’
a.
is a post-coital contraceptive.
b.
blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
d.
increases the concentration of estrogen and prevents ovulation in females.
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The contraceptive ‘SAHELI’
a.
is a post-coital contraceptive.
b.
blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
d.
increases the concentration of estrogen and prevents ovulation in females.
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The difference between spermiogenesis and spermiation is
a.
In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
b.
In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
c.
In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
d.
In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
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The difference between spermiogenesis and spermiation is
a.
In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
b.
In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
c.
In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
d.
In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Glycosuria, b. Gout, c. Renal calculi, d. Glomerular nephritis
Column II: i. Accumulation of uric acid in joints, ii. Mass of crystallised salts within the kidney, iii. Inflammation in glomeruli, iv. Presence of glucose in urine
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I (Function): a. Ultrafiltration, b. Concentration of urine, c. Transport of urine, d. Storage of urine
Column II (Part of Excretory System): i. Henle’s loop, ii. Ureter, iii. Urinary bladder, iv. Malpighian corpuscle, v. Proximal convoluted tubule
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Which of the following gastric cells indirectly help in erythropoiesis?
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Match the items given in Column I with those in Column II and select the correct option given below:
Column I: a. Fibrinogen, b. Globulin, c. Albumin
Column II: i. Osmotic balance, ii. Blood clotting, iii. Defence mechanism
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Which of the following is an occupational respiratory disorder?
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Calcium is important in skeletal muscle contraction because it
a.
prevents the formation of bonds between the myosin cross bridges and the actin filament.
b.
binds to troponin to remove the masking of active sites on actin for myosin.
c.
detaches the myosin head from the actin filament.
d.
activates the myosin ATPase by binding to it.
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Which of the following events does not occur in rough endoplasmic reticulum?
a.
Phospholipid synthesis
c.
Cleavage of signal peptide
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Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as
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Nissl bodies are mainly composed of
a.
Free ribosomes and RER
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Which of these statements is incorrect?
a.
Oxidative phosphorylation takes place in outer mitochondrial membrane.
b.
Enzymes of TCA cycle are present in mitochondrial matrix.
c.
Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
d.
Glycolysis occurs in cytosol.
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Select the incorrect match:
a.
Polytene – Oocytes of amphibians chromosomes
b.
Lampbrush – Diplotene bivalents chromosomes
c.
Submetacentric – L-shaped chromosomes
d.
Allosomes – Sex chromosomes
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Which of the following terms describe human dentition?
a.
Pleurodont, Diphyodont, Heterodont
b.
Thecodont, Diphyodont, Homodont
c.
Pleurodont, Monophyodont, Homodont
d.
Thecodont, Diphyodont, Heterodont
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Which of the following terms describe human dentition?
a.
Pleurodont, Diphyodont, Heterodont
b.
Thecodont, Diphyodont, Homodont
c.
Pleurodont, Monophyodont, Homodont
d.
Thecodont, Diphyodont, Heterodont
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Which one of these animals is not a homeotherm?
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Which one of these animals is not a homeotherm?
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Which of the following features is used to identify a male cockroach from a female cockroach?
a.
Presence of anal cerci
b.
Presence of a boat shaped sternum on the 9th abdominal segment
c.
Forewings with darker tegmina
d.
Presence of caudal styles
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Which of the following features is used to identify a male cockroach from a female cockroach?
a.
Presence of anal cerci
b.
Presence of a boat shaped sternum on the 9th abdominal segment
c.
Forewings with darker tegmina
d.
Presence of caudal styles
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Which of the following organisms are known as chief producers in the oceans?
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Which of the following organisms are known as chief producers in the oceans?
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Ciliates differ from all other protozoans in
a.
having two types of nuclei
b.
using flagella for locomotion
c.
using pseudopodia for capturing prey
d.
having a contractile vacuole for removing excess water
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Ciliates differ from all other protozoans in
a.
having two types of nuclei
b.
using flagella for locomotion
c.
using pseudopodia for capturing prey
d.
having a contractile vacuole for removing excess water
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Which of the following animals does not undergo metamorphosis?
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Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system.
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Which among the following is not a prokaryote?
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Which of the following is not a product of light reaction of photosynthesis?
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Stomatal movement is not affected by
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The Golgi complex participates in
a.
Activation of amino acid
c.
Respiration in bacteria
d.
Formation of secretory vesicles
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Which of the following is true for nucleolus?
a.
It is a site for active ribosomal RNA synthesis.
b.
Larger nucleoli are present in dividing cells.
c.
It takes part in spindle formation.
d.
It is a membrane-bound structure.
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The stage during which separation of the paired homologous chromosomes begins is
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Stomata in grass leaf are
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Pollen grains can be stored for several years in liquid nitrogen having a temperature of
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Oxygen is not produced during photosynthesis by
b.
Green sulphur bacteria
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Double fertilization is
a.
Syngamy and triple fusion
b.
Fusion of two male gametes of a pollen tube with two different eggs
c.
Fusion of two male gametes with one egg
d.
Fusion of one male gamete with two polar nuclei
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Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?
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Which of the following elements is responsible for maintaining turgor in cells?
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In which of the following forms is iron absorbed by plants?
a.
Both ferric and ferrous
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What is the role of NAD+ in cellular respiration?
a.
It is the final electron acceptor for anaerobic respiration.
b.
It functions as an enzyme.
c.
It is a nucleotide source for ATP synthesis.
d.
It functions as an electron carrier.
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Select the correct match :
a.
Francois Jacob and Jacques Monod – Lac operon
b.
Alec Jeffreys – Streptococcus pneumoniae
c.
Matthew Meselson and F. Stahl – Pisum sativum
d.
Alfred Hershey and Martha Chase – TMV
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Select the correct match:
a.
Francois Jacob and Jacques Monod - Lac operon
b.
Alec Jeffreys - Streptococcus pneumoniae
c.
Matthew Meselson and F. Stahl - Pisum sativum
d.
Alfred Hershey and Martha Chase - TMV
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The experimental proof for semiconservative replication of DNA was first shown in a
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The experimental proof for semiconservative replication of DNA was first shown in a
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Select the correct statement :
a.
Transduction was discovered by S. Altman.
b.
Franklin Stahl coined the term “linkage”.
c.
Spliceosomes take part in translation.
d.
Punnett square was developed by a British scientist.
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Select the correct statement:
a.
Transduction was discovered by S. Altman.
b.
Franklin Stahl coined the term 'linkage'.
c.
Spliceosomes take part in translation.
d.
Punnett square was developed by a British scientist.
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Which of the following pairs is wrongly matched?
b.
Starch synthesis in pea : Multiple alleles
c.
XO type sex determination : Grasshopper
d.
ABO blood grouping : Co-dominance
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Which of the following pairs is wrongly matched?
b.
Starch synthesis in pea : Multiple alleles
c.
XO type sex determination : Grasshopper
d.
ABO blood grouping : Co-dominance
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Offsets are produced by
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Offsets are produced by
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Which of the following flowers only once in its life-time?
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Which of the following has proved helpful in preserving pollen as fossils?
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Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
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Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
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The correct order of steps in Polymerase Chain Reaction (PCR) is
a.
Denaturation, Annealing, Extension
b.
Extension, Denaturation, Annealing
c.
Denaturation, Extension, Annealing
d.
Annealing, Extension, Denaturation
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A ‘new’ variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to
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Select the correct match:
a.
G. Mendel – Transformation
b.
Ribozyme – Nucleic acid
c.
T.H. Morgan – Transduction
d.
F2 × Recessive parent – Dihybrid cross
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In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
a.
Genetic Engineering Appraisal Committee (GEAC)
b.
Indian Council of Medical Research (ICMR)
c.
Research Committee on Genetic Manipulation (RCGM)
d.
Council for Scientific and Industrial Research (CSIR)
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Which of the following is a secondary pollutant?
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Natality refers to
a.
Number of individuals entering a habitat
c.
Number of individuals leaving the habitat
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Niche is
a.
the functional role played by the organism where it lives
b.
all the biological factors in the organism’s environment
c.
the range of temperature that the organism needs to live
d.
the physical space where an organism lives
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World Ozone Day is celebrated on
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In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?
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What type of ecological pyramid would be obtained with the following data? Secondary consumer: 120 g, Primary consumer: 60 g, Primary producer: 10 g
a.
Upright pyramid of biomass
b.
Inverted pyramid of biomass
c.
Upright pyramid of numbers
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Pneumatophores occur in
d.
Free-floating hydrophytes
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Pneumatophores occur in
d.
Free-floating hydrophytes
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Sweet potato is a modified
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Sweet potato is a modified
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Secondary xylem and phloem in dicot stem are produced by
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Secondary xylem and phloem in dicot stem are produced by
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Which of the following statements is correct?
a.
Stems are usually unbranched in both Cycas and Cedrus.
b.
Ovules are not enclosed by ovary wall in gymnosperms.
c.
Horsetails are gymnosperms.
d.
Selaginella is heterosporous, while Salvinia is homosporous.
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Which of the following statements is correct?
a.
Stems are usually unbranched in both Cycas and Cedrus.
b.
Ovules are not enclosed by ovary wall in gymnosperms.
c.
Horsetails are gymnosperms.
d.
Selaginella is heterosporous, while Salvinia is homosporous.
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Casparian strips occur in
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Casparian strips occur in
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Select the wrong statement:
a.
Mitochondria are the powerhouse of the cell in all kingdoms except Monera.
b.
Cell wall is present in members of Fungi and Plantae.
c.
Pseudopodia are locomotory and feeding structures in Sporozoans.
d.
Mushrooms belong to Basidiomycetes.
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Select the wrong statement:
a.
Mitochondria are the powerhouse of the cell in all kingdoms except Monera.
b.
Cell wall is present in members of Fungi and Plantae.
c.
Pseudopodia are locomotory and feeding structures in Sporozoans.
d.
Mushrooms belong to Basidiomycetes.
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Plants having little or no secondary growth are
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Plants having little or no secondary growth are
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Match the items given in Column I with those in Column II and select the correct option given below:
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After karyogamy followed by meiosis, spores are produced exogenously in
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Which one is wrongly matched?
a.
Unicellular organism – Chlorella
b.
Uniflagellate gametes – Polysiphonia
c.
Gemma cups – Marchantia
d.
Biflagellate zoospores – Brown algae
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Winged pollen grains are present in
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