Offsets are produced by
c.
Mitotic divisions
Correct Answer
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Offsets are vegetative propagules formed by mitotic division, as in plants like Pistia and Eichhornia.
The experimental proof for semiconservative replication of DNA was first shown in a
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Meselson and Stahl demonstrated semiconservative DNA replication in the bacterium Escherichia coli.
Select the correct match:
a.
Matthew Meselson and F. Stahl – Pisum sativum
b.
Francois Jacob and Jacques Monod – Lac operon
Correct Answer
c.
Alfred Hershey and Martha Chase – TMV
d.
Alec Jeffreys – Streptococcus pneumoniae
Step-by-Step AI Explanation
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Francois Jacob and Jacques Monod proposed the lac operon model.
Which of the following pairs is wrongly matched?
a.
XO type sex determination – Grasshopper
c.
ABO blood grouping – Co-dominance
d.
Starch synthesis in pea – Multiple alleles
Correct Answer
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Starch synthesis in pea is an example of gene interaction, not multiple alleles.
Select the correct statement:
a.
Spliceosomes take part in translation.
b.
Transduction was discovered by S. Altman.
c.
Punnett square was developed by a British scientist.
Correct Answer
d.
Franklin Stahl coined the term linkage.
Step-by-Step AI Explanation
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Punnett square was developed by Reginald C. Punnett, a British geneticist.
Which of the following has proved helpful in preserving pollen as fossils?
b.
Sporopollenin
Correct Answer
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Sporopollenin is highly resistant to degradation and helps pollen grains remain preserved as fossils.
Which of the following flowers only once in its life-time?
d.
Bamboo species
Correct Answer
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Bamboo is a monocarpic plant; it flowers only once in its lifetime and then dies.
The correct order of steps in Polymerase Chain Reaction (PCR) is
a.
Denaturation, Extension, Annealing
b.
Denaturation, Annealing, Extension
Correct Answer
c.
Annealing, Extension, Denaturation
d.
Extension, Denaturation, Annealing
Step-by-Step AI Explanation
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PCR proceeds through denaturation, then annealing of primers, and finally extension by DNA polymerase.
In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
a.
Research Committee on Genetic Manipulation (RCGM)
b.
Genetic Engineering Appraisal Committee (GEAC)
Correct Answer
c.
Council for Scientific and Industrial Research (CSIR)
d.
Indian Council of Medical Research (ICMR)
Step-by-Step AI Explanation
Verified Method
GEAC is the apex body in India that assesses the safety of introducing genetically modified organisms for public use.
In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is
a.
Research Committee on Genetic Manipulation (RCGM)
b.
Genetic Engineering Appraisal Committee (GEAC)
Correct Answer
c.
Council for Scientific and Industrial Research (CSIR)
d.
Indian Council of Medical Research (ICMR)
Step-by-Step AI Explanation
Verified Method
GEAC is the apex body in India that appraises the safety of genetically modified organisms for public use.
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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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Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?
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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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Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called
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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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A 'new' variety of rice was patented by a foreign company, though such varieties had been present in India for a long time. This is related to
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Select the correct match:
a.
T.H. Morgan – Transduction
b.
G. Mendel – Transformation
c.
F2 × Recessive parent – Dihybrid cross
d.
Ribozyme – Nucleic acid
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Which of the following is true for nucleolus?
a.
It takes part in spindle formation.
b.
It is a site for active ribosomal RNA synthesis.
c.
It is a membrane-bound structure.
d.
Larger nucleoli are present in dividing cells.
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The Golgi complex participates in
a.
Respiration in bacteria
b.
Activation of amino acid
c.
Formation of secretory vesicles
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Which of the following is not a product of light reaction of photosynthesis?
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Which among the following is not a prokaryote?
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Stomatal movement is not affected by
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The two functional groups characteristic of sugars are
a.
carbonyl and phosphate
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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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Which one is wrongly matched?
a.
Gemma cups – Marchantia
b.
Unicellular organism – Chlorella
c.
Biflagellate zoospores – Brown algae
d.
Uniflagellate gametes – Polysiphonia
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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. Herbarium, b. Key, c. Museum, d. Catalogue
Column II: i. It is a place having a collection of preserved plants and animals. ii. A list that enumerates methodically all the species found in an area with brief description aiding identification. iii. Is a place where dried and pressed plant specimens mounted on sheets are kept. iv. A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.
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Winged pollen grains are present in
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After karyogamy followed by meiosis, spores are produced exogenously in
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Oxygen is not produced during photosynthesis by
d.
Green sulphur bacteria
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Double fertilization is
a.
Fusion of two male gametes with one egg
b.
Syngamy and triple fusion
c.
Fusion of one male gamete with two polar nuclei
d.
Fusion of two male gametes of a pollen tube with two different eggs
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Which of the following elements is responsible for maintaining turgor in cells?
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Which of the following elements is responsible for maintaining turgor in cells?
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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 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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Pollen grains can be stored for several years in liquid nitrogen having a temperature of
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Pollen grains can be stored for several years in liquid nitrogen having a temperature of
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What is the role of NAD+ in cellular respiration?
a.
It is a nucleotide source for ATP synthesis.
b.
It is the final electron acceptor for anaerobic respiration.
c.
It functions as an electron carrier.
d.
It functions as an enzyme.
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What is the role of NAD+ in cellular respiration?
a.
It is a nucleotide source for ATP synthesis.
b.
It is the final electron acceptor for anaerobic respiration.
c.
It functions as an electron carrier.
d.
It functions as an enzyme.
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In which of the following forms is iron absorbed by plants?
b.
Both ferric and ferrous
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In which of the following forms is iron absorbed by plants?
b.
Both ferric and ferrous
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Niche is
a.
the range of temperature that the organism needs to live
b.
the functional role played by the organism where it lives
c.
the physical space where an organism lives
d.
all the biological factors in the organism’s environment
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Which of the following is a secondary pollutant?
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Natality refers to
a.
Number of individuals leaving the habitat
b.
Number of individuals entering a habitat
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World Ozone Day is celebrated on
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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 numbers
b.
Upright pyramid of biomass
d.
Inverted pyramid of biomass
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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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Casparian strips occur in
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Plants having little or no secondary growth are
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Pneumatophores occur in
c.
Free-floating hydrophytes
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Sweet potato is a modified
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Which of the following statements is correct?
a.
Horsetails are gymnosperms.
b.
Stems are usually unbranched in both Cycas and Cedrus.
c.
Selaginella is heterosporous, while Salvinia is homosporous.
d.
Ovules are not enclosed by ovary wall in gymnosperms.
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Select the wrong statement:
a.
Pseudopodia are locomotory and feeding structures in Sporozoans.
b.
Mitochondria are the powerhouse of the cell in all kingdoms except Monera.
c.
Mushrooms belong to Basidiomycetes.
d.
Cell wall is present in members of Fungi and Plantae.
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Secondary xylem and phloem in dicot stem are produced by
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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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Among the following sets of examples for divergent evolution, select the incorrect option:
a.
Brain of bat, man and cheetah
b.
Eye of octopus, bat and man
c.
Heart of bat, man and cheetah
d.
Forelimbs of man, bat and cheetah
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Which of the following is not an autoimmune disease?
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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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In a growing population of a country,
a.
reproductive and pre-reproductive individuals are equal in number.
b.
pre-reproductive individuals are less than the reproductive individuals.
c.
reproductive individuals are less than the post-reproductive individuals.
d.
pre-reproductive individuals are more than the reproductive individuals.
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Which part of poppy plant is used to obtain the drug 'Smack'?
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Match the items given in Column I with those in Column II and select the correct option given below:
a.
a-iii, b-iv, c-i, d-ii
b.
a-i, b-ii, c-iv, d-iii
c.
a-i, b-iii, c-iv, d-ii
d.
a-ii, b-i, c-iii, d-iv
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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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All of the following are included in ex-situ conservation except
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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:
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Calcium is important in skeletal muscle contraction because it
a.
detaches the myosin head from the actin filament.
b.
prevents the formation of bonds between the myosin cross bridges and the actin filament.
c.
activates the myosin ATPase by binding to it.
d.
binds to troponin to remove the masking of active sites on actin for myosin.
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Which of the following is an occupational respiratory disorder?
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Which of the following is an amino acid-derived hormone?
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Which of the following structures or regions is incorrectly paired with its function?
a.
Hypothalamus: production of releasing hormones and regulation of temperature, hunger and thirst.
b.
Corpus callosum: band of fibers connecting left and right cerebral hemispheres.
c.
Limbic system: consists of fibre tracts that interconnect different regions of brain; controls movement.
d.
Medulla oblongata: controls respiration and cardiovascular reflexes.
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Which of the following hormones can play a significant role in osteoporosis?
a.
Estrogen and Parathyroid hormone
b.
Parathyroid hormone and Prolactin
c.
Progesterone and Aldosterone
d.
Aldosterone and Prolactin
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The transparent lens in the human eye is held in its place by
a.
smooth muscles attached to the iris
b.
smooth muscles attached to the ciliary body
c.
ligaments attached to the iris
d.
ligaments attached to the ciliary body
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Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?
a.
Increased respiratory surface; inflammation of bronchioles
b.
Decreased respiratory surface; inflammation of bronchioles
c.
Increased number of bronchioles; increased respiratory surface
d.
Inflammation of bronchioles; decreased respiratory surface
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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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Match the items given in Column I with those in Column II and select the correct option given below:
Column I
a. Tidal volume
b. Inspiratory reserve volume
c. Expiratory reserve volume
d. Residual volume
Column II
i. 2500–3000 mL
ii. 1100–1200 mL
iii. 500–550 mL
iv. 1000–1100 mL
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Match the items given in Column I with those in Column II and select the correct option given below:
a.
a-i, b-iv, c-ii, d-iii
b.
a-iv, b-iii, c-ii, d-i
c.
a-iii, b-i, c-iv, d-ii
d.
a-iii, b-ii, c-i, d-iv
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Nissl bodies are mainly composed of
b.
Free ribosomes and RER
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Nissl bodies are mainly composed of
b.
Free ribosomes and RER
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Which of these statements is incorrect?
a.
Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
b.
Oxidative phosphorylation takes place in outer mitochondrial membrane.
c.
Glycolysis occurs in cytosol.
d.
Enzymes of TCA cycle are present in mitochondrial matrix.
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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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Which of the following terms describe human dentition?
a.
Pleurodont, Monophyodont, Homodont
b.
Pleurodont, Diphyodont, Heterodont
c.
Thecodont, Diphyodont, Heterodont
d.
Thecodont, Diphyodont, Homodont
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Which of the following events does not occur in rough endoplasmic reticulum?
a.
Cleavage of signal peptide
b.
Phospholipid synthesis
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Select the incorrect match:
a.
Submetacentric chromosomes – L-shaped chromosomes
b.
Polytene chromosomes – Oocytes of amphibians
c.
Allosomes – Sex chromosomes
d.
Lampbrush chromosomes – Diplotene bivalents
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AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?
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According to Hugo de Vries, the mechanism of evolution is
d.
Multiple step mutations
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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. Proliferative phase
b. Secretory phase
c. Menstruation
Column II
i. Breakdown of endometrial lining
ii. Follicular phase
iii. Luteal phase
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All of the following are part of an operon except
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A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by
b.
Both sons and daughters
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