Which one of the following elements in plants is not remobilised?
1. Calcium | 2. Potassium |
3. Sulphur | 4. Phosphorus |
Unlike water, all minerals cannot be passively absorbed by the roots. This is due to:
I. Minerals are present in the soil as charged particles
II. Concentration of minerals in soil is generally less than the concentration of minerals in roots
The correct statements are:
1. Only I
2. Only II
3. Both 1 & II are incorrect
4. Both 1 & II are correct
Deficiency symptoms of nitrogen and potassium are visible first in
1. senescent leaves | 2. young leaves |
3. roots | 4. buds |
Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (A-E) make it useful as a storage material?
A. Easily translocated
B. Chemically non-reactive
C. Easily digested by animals
D. Osmotically inactive
E. Synthesized during photosynthesis
The useful properties are
1. (B) and (C)
2. (B) and (D)
3. (A), (C) and (E)
4. (A) and (E)
Consider the following two statements and choose the correct response from the options given below:
I. Protons and oxygen formed by splitting of water are released in the lumen of thylakoid.
II. PS II is physically located on the inner side of the membrane of the thylakoid.
1. Both I and II are true and II explains I
2. Both I and II are true but II does not explain I
3. I is true and II is false
4. I is false and II is true
Which of the metabolites is common to respiration, mediated breakdown of fats, carbohydrates and proteins?
1. | Glucose-6-phosphate | 2. | Fructose 1, 6, bisphosphate |
3. | Pyruvic acid | 4. | Acetyl Co-A |
Based on the information given in Section 14.3 of your NCERT textbook, can you identify the chemical reaction catalyzed by the enzyme alcohol dehydrogenase?
1.
2.
3.
4. None of these
Phototropic curvature is the result of uneven distribution of.
1. gibberellin
2. phytochrome
3. cytokinins
4. auxin
When exposed to cold temperatures, which of the following is responsible for maintaining constant body temperature in humans?
1. Vasoconstriction and shivering
2. Vasodilation and shivering
3. Vasodilation and sweating
4. Vasoconstriction and sweating
To get pollinated by a bee, the Mediterranean Orchid, Ophrys, employs:
1. Sexual deceit
2. Pseudo-copulation
3. Reward in the form of nectar
4. Place for laying eggs
Species most vulnerable to extinction from human activities are those with:
1. low carrying capacities
2. high population growth rates
3. large niches
4. many natural predators
A protoplast is a cell :
1. without nucleus
2. undergoing division
3. without cell wall
4. without plasma membrane
Plastid differs from mitochondria on the basis of one of the following features. Mark the right answer.
1. Presence of two layers of membrane
2. Presence of ribosome
3. Presence of chlorophyll
4. Presence of DNA
The guts of cow and buffalo possess:
1. Chlorella spp.
2. Methanogens
3. Cyanobacteria
4. Fucus spp.
The complex formed by a pair of synapsed homologous chromosomes is called
1. | Equatorial plate | 2. | Kinetochore |
3. | Bivalent | 4. | Axoneme |
The lateral branches originate from the basal and underground portion of the main stem, grow horizontally beneath the soil and then come out obliquely upwards giving rise to leafy shoots in:
1. Opuntia and Euphorbia | 2. Mint and Jasmine |
3. Pistia and Eichhornia | 4. Banana and Pineapple |
The sheath covering the plumule in monocotyledonous seeds is called as:
1. | Coleorrhiza | 2. | Coleoptile |
3. | Testa | 4. | Tegmen |
The sieve tube elements and the companion cells are connected by:
1. sieve pores in their common transverse wall
2. sieve pores in their common longitudinal wall
3. pit fields in their common longitudinal wall
4. pit fields in their common transverse wall
Identify the correct statement amongst the following:
1. | Crossing over occurs in prophase I of meiosis and metaphase of mitosis. |
2. | DNA replication occurs once prior to mitosis and twice prior to meiosis. |
3. | Both mitosis and meiosis result in daughter cells identical to the parent cells. |
4. | Karyokinesis occurs once in mitosis and twice in meiosis. |
Which of the following is not a character of Ascomycetes?
1. | Mycelium is unbranched and septate |
2. | Asexual spores conidia are produced exogenously |
3. | Sexual spores called ascospores are produced endogenously |
4. | Conidia on germination produce mycelium |
Club mosses are:
1. psilotophytes
2. bryophytes
3. lycopodophytes
4. pteridophytes
The number of species that are known and described ranges between:
1. 1.2 and 1.3 million | 2. 1.4 and 1.5 million |
3. 1.7 and 1.8 million | 4. 2.1 and 2.2 million |
The phenomenon observed in some plants wherein parts of the sexual apparatus are used for forming embryos without fertilisation is called
1. | Parthenocarpy | 2. | Apomixis |
3. | Vegetative propagation | 4. | Sexual reproduction |
A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offsprings?
1. A., B and AB only
2. A,B, AB and O
3. O only
4. A and B only
Which one of the following is resistant to enzyme action
1. Pollen exine
2. Leaf cuticle
3. Cork
4. Wood fibre
In gene mutation, adenine is replaced by guanine. It is
1. Frame-shift mutation
2. Transcription
3. Transition
4. Transversion
A complex of ribosomes attached to a single strand of RNA is known as:
1. | Okazaki fragment | 2. | Polysome |
3. | Polymer | 4. | Polypeptide |
Morgan, in his experiment on fruit flies, found that the genes white and yellow were very tightly linked and showed:
1. | 50 % recombination | 2. | 37.2 % recombination |
3. | 12.5 % recombination | 4. | 1.3 % recombination |
The F2 genotypic ratio of a monohybrid cross is:
1. | 1 : 1 | 2. | 3 : 1 |
3. | 1 : 2 : 1 | 4. | 9 : 7 |
Reverse transcriptase is a:
1. | DNA-dependent RNA polymerase |
2. | RNA-dependent DNA polymerase |
3. | RNA-dependent RNA polymerase |
4. | DNA-dependent DNA polymerase |
Dioecy in flowering plants prevents:
1. Autogamy but not Geitonogamy
2. Geitonogamy but not Autogamy
3. Both Geitonogamy and Autogamy
4. Neither Geitonogamy nor Autogamy
The bacterial promotor sequence usually found at the -10 position (ten base pairs upstream of the transcription start site) is:
1. TTGACA
2. TAGACA
3. TATAAT
4. TATTAT
During which stage of the sewage treatment are the microbes used?
1. | Primary | 2. | Secondary |
3. | Tertiary | 4. | Quaternary |
The duration of which of the following is constant in most cell types?
1. G1 phase, S phase and G2 phase
2. S phase, M phase and G1 phase
3. S phase, G2 phase and M phase
4. G1 phase, M phase and G2 phase
Which of the following is a commercial blood cholesterol lowering agent?
1. Lipase
2. Cyclosporin A
3. Statin
4. Streptokinase
A terrestrial animal must be able to
1. Conserve water.
2. Active pump salts out through the skin.
3. Excrete large amounts of salts in urine.
4. Excrete large amounts of water in urine.
The price tag put by researchers on the annual ecosystem services is about:
1. USD 11 trillion
2. USD 22 trillion
3. USD 33 trillion
4. USD 44 trillion
According to Central Pollution Control Board, the diameter of particles that are responsible for causing great harm to human health is:
1. 2.5 micrometer
2. 5.0 micrometer
3. 10.0 micrometer
4. 7.5 micrometer
Genes present in the cytoplasm of eukaryotic cells are found in
1. Lysosomes and peroxisomes
2. Mitochondria and inherited via egg cytoplasm
3. Golgi bodies and smooth endoplasmic reticulum
4. Plastids and inherited via male gamete.
What would be the DNA content and chromosome number in a cell at the end of S phase with 2C DNA content and 2N chromosome number in G1?
1. 4C and 4N | 2. 2C and 4N |
3. 4C and 2N | 4. 2C and 2N |
Lack of independent assortment between two genes A and B would be due to
1. Crossing over
2. Linkage
3. Repulsion
4. Recombination.
Transmission tissue is a characteristic feature of:
1. | Solid style | 2. | Dry stigma |
3. | Wet stigma | 4. | Hollow style |
In a transcription unit, RNA polymerase binds to:
1. | Ori | 2. | Promoter |
3. | Operator | 4. | Structural gene |
The structure of the ribosome is made of:
1. | rRNA and Proteins |
2. | rRNA and Polysaccharides |
3. | mRNA, rRNA and tRNA |
4. | RNA, DNA and Proteins |
Any part of a plant taken out and grown in a test tube under sterile conditions in special nutrient media for generating new plants is called:
1. | Implant | 2. | Explant |
3. | Supplant | 4. | Plantlet |
The frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes was explained by:
1. Sutton Boveri
2. T.H. Morgan
3. Gregor J. Mendel
4. Alfred Sturtevant
Vegetative propagule in Agave is as:
1. Rhizome
2. Bulbil
3. Offset
4. Eye
According to the Central Pollution Control Board [CPCB] what size (in diameter) of particulate is responsible for causing greater harm to human health?
(1) 3.5 micrometers
(2) 2.5 micrometers
(3) 4.0 micrometers
(4) 3.0 micrometers
In the following, in each set, a conservation approach and an example of a method of conservation are given
(a) In situ conservation - Biosphere Reserve
(b) Ex situ conservation - Sacred groves
(c) In situ conservation - Seed bank
(d) Ex situ conservation - Cryopreservation `
Select the option with the correct match of approach and method :
(1) (a) and (c)
(2) (a) and (d)
(3) (b) and (d)
(4) (a) and (b)
Which of the following is incorrect for wind-pollinated plants?
(1) Well exposed stamens and stigma
(2) Many ovules in each ovary
(3) Flowers are small and not brightly colored
(4) Pollen grains are light and non-sticky
GnRH, a hypothalamic hormone, needed in reproduction, acts on the
1. anterior pituitary gland and stimulates secretion of LH and oxytocin
2. anterior pituitary gland and stimulates secretion of LH and FSH
3. posterior pituitary gland and stimulates secretion of oxytocin and FSH
4. posterior pituitary gland and stimulates secretion of LH and relaxin
Which one of the following statements is correct with respect to salt water balance inside the body of living organisms?
1. When water is not available, camels do not produce urine but store urea in tissues.
2. Salmon fish excretes lot of stored salt through gill membrane when in fresh water.
3. Paramecium discharges concentrated salt solution by contractile vacuoles.
4. The body fluids of fresh water animals are generally hypotonic to surrounding water.
Which two of the following changes (1-4) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)?
(a) Increase in red blood cell size
(b) Increase in red blood cell production
(c) Increased breathing rate
(d) Increase in thrombocyte count
1. (b) and (c)
2. (c) and (d)
3. (a) and (d)
4. (a) and (b)
Cattle fed with spoilt hay of sweet clover which contains dicumarol
1. are healthier due to a good diet
2. catch infections easily
3. may suffer vitamin K deficiency and prolonged bleeding
4. may suffer from beri beri due to deficiency of B vitamins
Cu ions released from copper-releasing Intra Uterine Devices (IUDs):
1. make the uterus unsuitable for implantation
2. increase phagocytosis of sperms
3. suppress sperm motility
4. prevent ovulation
One of the major components of cell wall of most fungi is :
1. Hemicelluloses
2. Chitin
3. Peptidoglycan
4. Cellulose
Planaria possess high capacity of–
1. metamorphosis
2. regeneration
3. alternation of generation
4. bioluminescence
Which of the following is not a feature of birds?
1. Forelimbs modified into wings
2. Single occipital condyle
3. Ten pairs of cranial nerves
4. Four chambered heart
Which one of the following statements is incorrect?
1. Mesoglea is present in between ectoderm and endoderm in Obelia
2. Radial symmetry is found in Asterias
3. Fasciola is a pseudocoelomate animal
4. Taenia is a triploblastic animal
Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?
1. Neutrophils | 2. Basophils |
3. Eosinophils | 4. Monocytes |
Match the following and choose the correct answer
A. Touch i. Nasal epithelium
B. Smell ii. Foramen magnum
C. Cranial nerves iii. Sensory papillae
D. Medulla oblongata iv. Peripheral nervous system
Options:
1. A-iii, B-i, C-ii, D-iv
2. A-ii, B-i, C-iv, D-iii
3. A-iii, B-iv, C-ii, D-i
4. A-iii, B-I , C-iv, D-ii
ADA is an enzyme which is deficient in a genetic disorder SCID. What is the full form of ADA?
1. | Adenosine deoxyaminase | 2. | Adenosine deaminase |
3. | Aspartate deaminase | 4. | Arginine deaminase |
What constitutes about 50% of the lymphoid tissue in the human body?
1. | Malt | 2. | Spleen |
3. | Lymph nodes | 4. | Liver |
Lysozyme should be used when isolating DNA in a pure form from:
1. | A bacterial cell | 2. | A fungal cell |
3. | A plant cell | 4. | An animal cell |
Which one of the following is an example of negative feedback loop in humans?
1. Secretion of sweat glands and constriction of skin blood vessels when it is too hot.
2. Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.
3. Secretion of tears after falling of sand particles into the eye.
4. Salivation of mouth at the sight of delicious food.
In humans, blood passes from the post-caval to the diastolic right atrium of heart due to
1. Pressure difference between the post-caval and atrium
2. Pushing open of the venous valves
3. Suction pull
4. Stimulation of the sinoatrial node
Assuming they all had the same number of carbon atoms, which of the following has the most C-H bonds?
1. an unsaturated fat
2. a polyunsaturated fat
3. a polysaccharide
4. a saturated fat
Which one of the following pairs of structures distinguishes a nerve cell from other types of cells?
1. Nucleus and mitochondria
2. Perikaryon and dendrites
3. Vacuoles and fibres
4. Flagellum and medullary sheath
Elbow joints is an example of
1. Ball and socket joint
2. Pivot joint
3. Hinge joint
4. Gliding joint
In ornithine cycle, which of the following wastes are removed from the blood?
1. CO2 and ammonia
2. Ammonia and urea
3. CO2 and urea
4. Urea and urine
Identify the correct statement regarding the pineal gland or the hormone secreted by it:
1. | The gland is situated on the ventral side of the forebrain |
2. | The hormone secreted by the gland is called as melanin |
3. | The hormone regulates the diurnal rhythm of our body |
4. | The hormone decreases immunity |
Diarrhoea is most likely to affect most the process of:
1. Ingestion of food
2. Passage of food through the upper alimentary canal
3. Digestion of the food in the large intestine
4. The absorption of food
The second polar body is formed as a result of:
1. Reductional division in primary oocyte
2. Reductional division in secondary oocyte
3. Equational division in secondary oocyte
4. Equational division in primary oocyte
Consider the following statements:
I: | Menstruation only occurs if the released ovum is not fertilized. |
II: | Lack of menstruation always indicates pregnancy. |
Of the given statements, the correct statements is/are:
1. | I only | 2. | II only |
3. | I and II | 4. | None |
MTP is considered relatively safe up to ____ weeks of pregnancy.
1. | 12 | 2. | 16 |
3. | 20 | 4. | 24 |
Fovea centralis is a part of:
1. Sclera | 2. Cornea |
3. Retina | 4. Choroid |
The part of the human brain widely regarded as ‘the gate-keeper to consciousness’ is the:
1. vasomotor center
2. corpora quadrigemina
3. diencephalon
4. reticular formation
The first heart sound is heard during:
1. | beginning of ventricular systole |
2. | end of ventricular systole |
3. | atrial systole |
4. | ventricular ejection |
Which of the following equations regarding the calculation of pulmonary capacities would be correct?
1. IC = IRV – TV | 2. EC = VC – IRV |
3. VC = ERV + IRV | 4. TLC = VC – RV |
Beginning from the collecting duct, arrange the following structures in the correct sequence in which urine passes to the external environment: (A) ureter, (B) renal pelvis, (C) calyx, (D) urinary bladder, (E) urethra.
1. A, B, C, D, E | 2. C, D, A, E, B |
3. C, B, A, D, E | 4. B, D, A, C, E |
The central part of the thick filaments not overlapped by the thin filaments is called as:
1. | A band | 2. | I band |
3. | H zone | 4. | Sarcomere |
Which of the following equipments is essentially required for growing microbes on a large scale for industrial production of enzymes?
1. Bioreactor
2. BOD incubator
3. Sludge digester
4. Industrial oven
Select the correct sequence for transport of sperm cells in male reproductive system.
1. Testis Epididymis Vasa efferentia Vas deferens Ejaculatory duct Inguinal canal
Urethra Urethral meatus
2. Testis Epididymis Vasa efferentia Rete testis Inguinal canal Urethra
3. Seminiferous tubules Rete testis Vesa efferentia Epididymus Vas deferens
Ejaculatory duct Urethra Urethral meatus
4. Seminiferous tubules Vasa efferentia Epididymis Inguinal canal Urethra
The infectious stage of plasmodium that enters the human body is:
1. Sporozoites
2. female gametocytes
3. Male gametocytes
4. Trophozoites
RNA interference is used for which of the following purposes in the field of biotechnology?
(1) to develop a plant tolerant to abiotic stresses
(2) to develop a pest-resistant plant against infestation by nematode
(3) to enhance the mineral usage by the plant
(4) to reduce post-harvest losses
Feeling the tremor of an earthquake, a scared resident of the seventh floor of a multistoried building starts climbing down the stairs rapidly. Which hormone initiated this action?
1. Thyroxine
2. Adrenaline
3. Glucagon
4. Gastrin
Stimulation of a muscle fibre by a motor neuron occurs at
1. the neuromuscular junction
2. the transverse tubules
3. the myofibril
4. the sarcoplasmic reticulum
Vasa efferentia are the ductules leading from
1. testicular lobules to rete testis
2. rete testis to vas deferens
3. vas deferens to epididymis
4. epididymis to urethra
Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?
1. Urea - 5-10 mg/100 ml of blood
2. Blood sugar (fasting) - 80-100 mg/100 ml
3. Total blood volume - 3-4 litres
4. ESR in Wintrobe method - 9-15 mm in males and 20-34 mm in females
The chronological steps of a polymerase chain reaction are:
1. | Denaturation, Annealing of primers, Primer extension |
2. | Annealing of primers, Denaturation, Primer extension |
3. | Annealing of primers, Primer extension, Denaturation |
4. | Denaturation, Primer extension, Annealing of primers |
The "lock and key hypothesis", given be Emil Fischer, attempts to explain the mechanism of:
1. denaturation of enzyme proteins
2. the formation of peptide binds
3. sharing of electrons
4. enzyme specificity
The world’s highly prized wool yielding Pashmina breed is
1. Kashmir sheep - Afgan sheep cross.
2. Goat
3. Sheep
4. Goat - sheep cross
The age of fossils in the past was generally determined by the radiocarbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary periods for different groups of organisms include:
1. | study of the conditions of fossilization. |
2. | electron spin resonance (ESR) and fossil DNA. |
3. | study of carbohydrates/proteins in rocks. |
4. | study of carbohydrates/proteins in fossils. |
Consider the following two statements:
I: | Most parasites are pathogens. |
II: | Pathogens have to adapt to life within the environment of the host. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only I is correct
4. Only II is correct
Bryophytes evolved from:
1. Chlorophyte ancestors
2. Tracheophyte ancestors
3. Rhynia-type plants
4. Psilophytons
Two mya, Australopithecines probably lived in:
1. Western Africa
2. Eastern African grasslands
3. South America
4. South East Asia
If there are two forms of a specific enzyme in a population, and if the relative frequencies of the individuals possessing each form of the enzyme changes, then certainly there is:
1. | mutation | 2. | genetic drift |
3. | gene migration | 4. | evolution |
Ovulation in the human female normally takes place during the menstrual cycle
1. just before the end of the secretory phase.
2. at the beginning of the proliferative phase.
3. at the end of the proliferative phase.
4. at the mid-secretory phase.
Which of the following recordings of blood pressure in a healthy person will be considered as normal?
1. | 150/80 mmHg | 2. | 110/70 mmHg |
3. | 120/96 mmHg | 4. | 180/110 mmHg |
The neurotransmitter released at the neuro-muscular junction is:
1. Epinephrine
2. Acetylcholine
3. Serotonin
4. GABA