The superior and inferior radioulnar joints are example of
1. gliding joint
2. hinge joint
3. condyloid joint
4. pivot joint
A counter current mechanism for concentration of urine exists between:
1. Ascending limb of vasa recta and ascending limb of loop of Henle
2. Descending limb of vasa recta and descending limb of loop of Henle
3. Collecting duct and ascending limb of loop of Henle
4. Collecting duct and descending limb of loop of Henle
The conducting part of the human respiratory system is not involved in:
I. clearing inhaled air from foreign particles
II. humidifying the exhaled air
III. bringing the air to a temperature higher than body temperature
1. Only I
2. Only II and III
3. Only I and II
4. I, II and III
To activate coagulation at the site of injury, certain factor that play an important role in coagulation, can be released by:
1. Platelets and damaged tissue
2. Basophils and mast cells
3. Wall of the damaged vessel and basophils
4. Platelets and mast cells
When one enters a dark room from a bright area:
1. retinol is converted to rhodopsin and eye sensitivity is decreased
2. rhodopsin is converted to retinol and eye sensitivity is decreased
3. rhodopsin is converted to retinol and eye sensitivity is increased
4. retinol is converted to rhodopsin and eye sensitivity is increased
Olfactory epithelium extends directly into which of the following extensions of the brain’s limbic system?
2. Olfactory lobe
Lactational amenorrhea method of contraception is based on the fact that:
1. Ovulation and menstrual flow does not occur post conception during intense lactation
2. The cervix mucus becomes hostile to sperms after parturition during intense lactation
3. Ovulation and menstrual flow does not occur post partum during intense lactation
4. The endometrium is reabsorbed rather than sloughed off during intense lactation
Implantation in humans occurs at the stage of:
Oogenesis is initiated:
1. During the fetal life
2. Just before birth
3. Just after birth
4. At puberty
Carbohydrates in the chyme are hydrolysed into disaccharides by:
1. Salivary amylase
2. Pancreatic amylase
3. Gastric amylase
4. Intestinal amylase
What would not be true for pancreas?
1. The exocrine pancreatic acini secrete digestive enzymes
2. The endocrine islets of Langerhans constitute about 50% of the gland
3. The hormones secreted by endocrine pancreas are peptides
4. Alpha cells secrete glucagon, beta cells secrete insulin and delta cells secrete somatostatin
Which of the following statements can explain the fact that many scientists do not consider viruses as living organisms?
1. Metabolism and growth are defining properties of living organisms.
2. Anything less than a complete structure of a cell does not ensure independent living.
3. All cells arise from pre-existing cells
4. All biochemical reactions are catalyzed by enzymes.
A ribbonlike structure consisting of three protein components and extending across the region of synapsed chromosomes during the prophase of meiosis, is called:
3. Synaptonemal complex
4. Recombination nodule
The structure that helps in cell wall formation, DNA replication and respiration in bacteria is :
With reference to human beings, antibiotics are actually:
1. Anti life
2. Pro life
3. Irrelevant to life
4. Defining life
Restriction enzymes do not act on the DNA of the Host cell in which they are produced because
1. Host DNA is packed into chromosomes
2. Restriction enzymes are ineffective on host DNA
3. Host DNA does not have the restriction site for the Restriction enzymes.
4. Restriction site of host DNA is methylated.
Species formation without branching of the evolutionary line of descent is called as:
1.anagenesis, or phyletic evolution
2.cladogenesis, or divergent evolution
3. convergent evolution
Which of the following statements is incorrect regarding an evolutionary trend?
1. It is the continuous change of a character within an evolving lineage
2. The number of trends in any lineage is same as the number of characters evolving
3. A trend may be progressive or retrogressive
4. Direction and speed of evolutionary trends in a lineage are universal throughout the family and are not subject to variations.
How were nematode specific genes introduced in tobacco plant?
1. Using page DNA
2. Using a retrovirus
3. By gene gun
4. Using Agrobacterium tumefaciens
Histones are rich in:
1. Basic amino acids lysine and arginine
2. Acidic amino acids lysine and arginine
3. Basic amino acids glutamate and aspartate
4. Acidic amino acids glutamate and aspartate
If individuals of genotype AaBbCc are intercrossed, how many different phenotypes can appear in their offspring?
Before releasing new cultivars in plant breeding programs, their testing includes all the following except:
1. growing these in the research fields and recording their performance under ideal fertiliser application, irrigation, and other crop management practices.
2. testing the materials in farmers’ fields, for one growing season at selected locations in the country
3. comparison to the best available local crop cultivar – a check or reference cultivar
4. taking care of all patent and legal isuues
Identify the incorrectly matched pair:
1. Cells of nucellus Diploid
2. Megaspore mother cell Haploid
3. Functional megaspore Haploid
4. Cells of female gametophyte haploid
Pollen grains lose viability within 30 minutes of their release in some members of:
Cocaine acts through:
1. Interfering with action of acetylcholine
2. Potentiating catecholamines
3. Interfering with transport of dopamine
4. Releasing endorphins and enkephalins
Some amino acids are coded by more than one codon. Hence genetic code is:
2. Non specific
What is F2 phenotypic ration in a dihybrid cross?
1. 1 : 1
2. 3 : 1
3. 9 : 3 : 3 : 1
4. 1 : 1 : 1: 1
Fragmentation is not a common method of asexual reproduction in:
3. Filamentous algae
4. Protonema of moss
Unlike bryophytes and pteridophytes, in gymnosperms:
1. the male and female gametophytes do not have an independent existence
2. the vascular tissue is poorly developed
3. the reproduction is dependent on water in most cases
4. the plants bodies are clearly differentiated into root, stem and leaves
African sleeping sickness is caused by a/an:
1. Amoeboid protozoan
2. Flagellated protozoan
3. Ciliated protozoan
1. Bacteria infecting ssRNA viruses
2. Bacteria infecting dds RNA viruses
3. Viruses that infect bacteria and generally have ds DNA
4. Viruses that infect bacteria and generally have ds RNA
Match each item in Column I with one in Column II and select the correct answer from the codes given:
A B C
1. a b c
2. c b a
3. c a b
4. a c b
A transverse section of stem is stained first with safranin then with fast green following the usual schedule of double staining for the preparation of a permanent slide. What would be the colour of the stained xylem and phloem?
1. Red and green
2. Green and red
3. Orange and yellow
4. Purple and orange
Identify the family of angiosperms that will have the following floral diagram:
The condition of stamens in China rose is described as:
Body cavity is the cavity present between body wall and gut wall. In some animals the body cavity is not lined
by mesoderm. Such animals are called
What is present between ectoderm and endoderm in diploblastic animals?
The ecological niche is:
1. The surface area of the ocean
2. An ecologically adapted zone
3. The physical position and functional role of a species within the community
4. Formed of all plants and animals living at the bottom of a lake
The expanded form of DDT is: (NCERT Exemplar)
1. Dichloro diphenyl trichloroethane
2. Dichloro diethyl trichloroethane
4. Dichloro diphenyl tetrachloroacetate
Ecological sanitation, also known as ecosan, is a new paradigm in sanitation that:
1. eliminates the use of conventional pesticides to decrease environmental insult
2. recognises human excreta and household wastewater as resources that can and are recovered, treated, and reused
3. emphasises the disposal of solid wastes in sanitary landfill sites
4. emphasises the need for strict legislation against polluting industries.
Which one of the following is not a major characteristic feature of biodiversity hot spots? (NCERT Exemplar)
1. Large number of species
2. Abundance of endemic species
3. Mostly located in the tropics
4. Mostly located in the polar regions
An inverted pyramid of biomass can be found in which ecosystem ?(NCERT Exemplar)
3. Grass land
1. Is easily broken down by microbes
2. Undergoes decomposition rapidly
3. Serves as reservoir of nutrients
4. Yields organic nutrients on mineralization
Under unfavorable conditions, many zooplankton species in lakes and ponds are known to enter a stage of suspended development called as:
During the conversion of succinyl CoA to succinic acid in TCA cycle:
1. One molecule of ATP is directly synthesized
2. is reduced
3. FAD is reduced
4. One molecule of GTP is synthesized
This is an intext question in Section 13.7.1 NCERT. How many carbon atoms does the primary carbon dioxide acceptor have in photosynthesis?
Unlike xylem, the movement of sap in phloem is:
1. essentially unidirectional
2. from a sink to a source
3. does not involve water
4. in any direction from source to a sink
Figure shows human urinary system with structures labelled (a) to (d). Select option which correctly identifies them and gives their characteristics and/or functions.
1. (a) Adrenal gland-located at the anterior part of kidney.
Secretes catecholamines which stimulate glycogen break-down
2. (b) Pelvis-board funnel shaped space inner to hilum, directly connected to loops of Henle
3. (c) Medulla-inner zone of kidney and contains complete nephrons
4. (d) Cortex-outer part of kidney and do not contain any part of nephrons
Select the correct statement regarding the specific disorder of muscular or skeletal system.
1. Myasthenia gravis - Autoimmune disorder which inhibits sliding of myosin filaments
2. Gout - Inflammation of joints due to extra deposition of calcium.
3. Muscular dystrophy - Age related shortening of muscles
4. Osteoporosis - Decrease in bone mass and higher chances of fractures with advancing age.
During the propagation of a nerve impulse, the action potential results from the movement of
1. Na+ ions from extracellular fluid to intracellular fluid.
2. K+ ions from extracellular fluid to intracellular fluid.
3. Na+ ions from intracellular fluid to extracellular fluid.
4. K+ ions from intracellular fluid to extracellular fluid.
Which two of the following changes (a-d) 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
Changes occurring are
(1) (a) and (d)
(2) (a) and (b)
(3) (b) and (c)
(4) (c) and (d)
A chemical signal that has both endocrine and neural roles is
Secretions from which one of the following are rich in fructose, calcium and some enzymes?
(3) Salivary glands
(4) Male accessory glands
If for some reason the parietal cells of the gut epithelium become partially non-functional, what is likely to happen?
1. The pH of stomach will fall abruptly.
2. Steapsin will be more effective.
3. Proteins will not be adequately hydrolyzed by pepsin into proteases and peptones.
4. The pancreatic enzymes and specially the trypsin and lipase will not work efficiently.
If there are 999 bases in RNA that codes for a protein with 333 amino acids, and the base at position 901 is
deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?
Protein synthesis in an animal cell occurs
1. On cytosolic ribosomes only
2. On ribosomes attached to E.R. and nuclear envelope
3. On ribosomes present in nucleolus as well as cytoplasm
4. On ribosomes present both in cytoplasm as well as mitochondria.
Filiform apparatus is characteristic feature of:
1. Nucellar embryo
2. Aleurone cell
4. Generative cell
‘ Filiform apparatus is a characteristic feature of:
Alleles are :
1. true breeding homozygotes
2. different molecular forms of a gene
4. different phenotype
Which one of the following is a case of wrong matching
1. Somatic hybridization - Fusion of two diverse cells
2. Vector DNA -Site for t-RNA synthesis
3. Micropropagation- In vitro production of plants in large numbers
4. Callus - Unorganised mass of cell produced in tissue culture
Planaria possesses high capacity of
2. Alternation of generations
Arrange the following events of meiosis in correct sequence
(a) Crossing over
(c) Terminalisation of chiasmata
(d) Disappearance of nucleolus
Which one of the following shows isogamy with non-flagellated gametes?
Choose the wrong statements:
1. Neurosporais used in the study of biochemical genetics
2. Morels and truffles are poisonoues mushrooms
3. Yeast is unicellular and useful in fermentation
4. Penicilliumis multicellular and produces antibiotics
In cereal grain, single cotyledon is represented by
Identify the wrong statement in context of heartwood
1. Organic compounds are deposited in it
2. It is highly durable
3. It conducts water and minerals efficiently
4. It comprises dead elements with highly lignified walls
Choose the correctly matched pair:
1. Inner lining of salivary ducts - Ciliated epithelium
2. Moist surface of buccal cavity - Glandular epithelium
3. Tubular parts of nephrons- Cuboidal epithelium
4. Inner surface of bronchioles - squamous epithelium
Metagenesis refers to–
1. Alternation of generation between asexual and sexual phases of an organism
2. Occurrence of a drastic change in form during post-embryonic development
3. Presence of a segmented body and parthenogenetic mode of reproduction
4. Presence of different morphic forms
During cell growth, DNA synthesis takes place in
1. M phase
2. S Phase
3. G1 phase
4. G2 phase
Which one of the following statements is correct with reference to enzymes?
(1) Apoenzyme = Holoenzyme + Coenzyme
(2) Holoenzyme = Apoenzyme + Coenzyme
(3) Coenzyme = Apoenzyme + Holoenzyme
(4) Holoenzyme = Coenzyme + Co-factor
Joint Forest Management Concept was introduced in India during:
Frog feeding on herbivorous insect is
1. Primary consumer
2. Secondary consumer
3. Tertiary consumer
4. Top carnivore
Annual migration does not occur in the case of
2. Siberian crane.
4. arctic tern.
Opening of floral buds into flowers, is a type of:-
1. autonomic movement of locomotion
2. autonomic movement of variation
3. paratonic movement of growth
4. autonomic movement of growth
All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
1. lactate dehydrogenase
2. isocitrate dehydrogenase
3. malate dehydrogenase
4. succinate dehydrogenase
In sugarcane plant, is fixed in malic acid in which the enzyme that fixes is
1. Ribulose biphosphate carboxylase
2. Phosphoenol pyruvic acid carboxylase
3. Ribulose phosphate kinase
4. Fructose phosphatase
An element playing important role in nitrogen fixation is
Saheli, is an oral contraceptive pill that has very high contraceptive value with little side effects. It is because
1. it is taken once in a week
2. it contains synthetic progesterone
3. it contains centchroman
4. it decreases risk of cancer
Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of
Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.
Which of the following depicts the correct pathway of transport of sperms?
1. Rete testis →Efferent ductules → Epididymis → vas deferens
2. Rete testis → Epididymis → Efferent ductules → vas deference
3. Rete testis → Vas deference → Efferent ductules → Epididymis
4. Efferent ductules →Rete testis → Vas deference →Epididymis
Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?
1. Insulin Glucagon
2. Aldosterone Atrial Natriuretic Factor
3. Relaxin Inhibin
4. Parathormone Calcitonin
The two antibiotic resistance genes on vector pBR 322 are for
1. Ampicillin and Tetracycline
2. Ampicillin and Chloramphenicol
3. Chloramphenicol and Tetracycline
4. Tetracycline and Kanamycin
Which of the following statements about methanogens is not correct?
1. The can be used to produce biogas,
2. They are found in the rumen of cattle and their excreta.
3. They grow aerobically and breakdown cellulose-rich food.
4. They produce methane gas.
Which of these following methods is the most suitable for disposal of nuclear waste?
1. Bury the waste within rocks deep below the Earth's surface
2. Shoot the waste into space
3. Bury the waste under Antarctic ice-cover
4. Dump the waste within rocks under deep ocean
Drug called 'Heroin' is synthesized by:
1. nitration of morphine
2. methylation of morphine
3. acetylation of morphine
4. glycosylation of morphine
The Earth Summit held in Rio de Janeiro in 1992 was called:
1. for immediate steps to discontinue use of CFCs that were damaging the ozone layer
2. to reduce emissions and global warming
3. for conservation of biodiversity and sustainable utilization of its benefits
4. to asess threat posed to native species by invasive weed species
Which of the following is true for Golden rice?
1. It has yellow grains, because of gene introduced from a primitive variety of rice
2. It is Vitamin A enriched, with a gene from daffodil
3. It is pest resistant, with a gene from Bacillus thuringiensis
4. It is drought tolerant, developed using Agrobacterium vector
The number of contrasting characters studied by Mendel for his experiments was :
A Hominid fossil discovered in Java in 1891, now extinct, having a cranial capacity of about 900 ccs was:
(1) Homo erectus
(2) Neanderthal man
(3) Homo sapiens