Maximum amount of water in the human alimentary canal is absorbed in:
1. Large intestine
2. Small intestine
3. Stomach
4. Buccal cavity
Identify the incorrectly matched pair:
1. Sternum: Breast bone
2. Clavicle: Collar bone
3. Patella: Knee cap
4. Coxa: Shoulder blade
An excessive loss of body fluid can:
1. activate osmoreceptors, stimulating hypothalamus to release ADH and thereby preventing diuresis
2. switch off osmoreceptors, suppressing release of ADH promoting diuresis
3. activate osmoreceptors, stimulating hypothalamus to release ADH and thereby promoting diuresis
4. switch off osmoreceptors, suppressing release of ADH preventing diuresis
Consider the following statements:
I. The thoracic chamber is anatomically an air tight chamber.
II. Any change in the volume of the thoracic cavity will be reflected in the pulmonary cavity.
1. Both I and II are correct and II explains I
2. Both I and II are correct and I explains II
3. Both I and II are correct but II does not explain I
4. Both I and II are incorrect
The functions of spleen include all of the following except:
1. Mechanical filtration of red blood cells.
2. Production of all types of blood cells during fetal life
3. Storage of red blood cells, lymphocytes and other formed elements.
4. Suppression of cell mediated and humoral immune responses
The nose and taste buds contain:
1. mechanoreceptors | 2. photoreceptors |
3. chemoreceptors | 4. proprioceptors |
Match each item in COLUMN I [part of the brain] with one in COLUMN II [function] and select the answer from the codes given below:
|
COLUMN I |
|
COLUMN II |
A. |
Medulla oblongata |
a. |
Motor control |
B. |
Pons varoli |
b. |
Hunger center |
C. |
Cerebellum |
c. |
Bridge between cerebellum and rest of brain |
D. |
Hypothalamus |
d. |
Gastric secretions, respiratory rhythm center |
Codes
A | B | C | D | |
1. | c | d | b | a |
2. | d | c | a | b |
3. | c | d | a | b |
4. | d | c | b | a |
The placenta is connected to the embryo through:
1. | Ligaments | 2. | Portal vein |
3. | Umbilical cord | 4. | Mesentery |
A statutory ban on amniocentesis in India was necessary because:
1. | It is very expensive |
2. | It can tell about chromosomal aberrations |
3. | It is an invasive procedure and carries a high risk of abortions |
4. | It can be used for pre-natal sex determination of the fetus leading to female feticides |
Corpus luteum is:
1. Ruptured Graafian follicle
2. Released ovum surrounded by cells
3. Developing follicle
4. Enzyme-secreting structure in the ovary
Glycosuria and ketonuria are diagnostic of:
1. Graves’ disease | 2. Addison’s disease |
3. Conn’s syndrome | 4. Diabetes mellitus |
Scientists think that mitochondria may have once been separate living organisms for all of the following reasons except that they
1. have cilia and flagella
2. have their own DNA
3. can reproduce
4. can produce their own proteins
The stage of mitosis at which morphology of chromosomes is most easily studied is the:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
Chitin, a complex polysaccharide, is found in:
1. | Plant cell wall |
2. | The exoskeleton of arthropods and cell walls of most fungi |
3. | Bacterial cell wall |
4. | Cartilage and other connective tissues |
Arbuscular mycorrhizas are formed only by fungi in the division:
1. | Ascomycota | 2. | Glomeromycota |
3. | Basidiomycota | 4. | Microsporidia |
A piece of DNA is inserted within the gene of beta-galactosidase in the E.coli plasmid. X-gal is added to the medium during screening. The colonies of recombinant transformants:
1. | will show an increase in growth |
2. | will not be able to survive |
3. | will give a deep blue color |
4. | will not produce any color |
In sympatric speciation, reproductive isolation:
1. develops without a geographic barrier
2. develops due to a geographic barrier
3. is due to a change in chromosome number
4. does not lead to development of a barrier to mating
The ‘phrase’ that will best describe ‘Natural Selection’ will be:
1. differential success in reproduction
2. differential mortality
3. assortative mating
4. descent with modification
The amino acid attaches to the tRNA at its:
1. 5' - end
2. 3' - end
3. Anti codon site
4. DHU loop
The study of all the proteins encoded by the genome of an organism is called :
1. | Proteome | 2. | Proteomics |
3. | Translation studies | 4. | Genomics |
Which of the following is not a feature of the human genome?
1. | The human genome contains 3164.7 million nucleotide bases. |
2. | The largest human gene of dystrophin has about 2.4 million bases. |
3. | The total number of genes in the human genome is much higher than the previous estimates. |
4. | Less than 2 % of the genome codes for proteins. |
The improvement of microscopy techniques in the late 1800s set the stage for the emergence of modern genetics because:
1. | it revealed new and unanticipated features of Mendel’s pea plant varieties. |
2. | it allowed biologists to study meiosis and mitosis, revealing the parallels between the behaviors of genes and chromosomes. |
3. | it allowed scientists to see the DNA present within chromosomes. |
4. | it led to the discovery of mitochondria. |
The best method for producing plants free of viruses will be:
1. | Meristem culture | 2. | Embryo culture |
3. | Somatic embryogenesis | 4. | Somatic hybridization |
Pollens grains are long ribbon-like and are carried passively in water in:
1. | female plants remain submerged in water |
2. | male plants remain submerged in water |
3. | both male and female plants remain submerged in water |
4. | both male and female plants reach the surface of the water. |
Chasmocleistogamy [Amphicarpy] is not seen in:
1. | Viola [Common pansy] | 2. | Oxalis |
3. | Pisum sativum | 4. | Commelina |
A cancer, virtually diagnostic of AIDS, is :
1. Retinoblastoma
2. Wilm’stomor
3. Kaposi sarcoma
4. Cancer cervix
The inheritance of IA and IB allele exhibit:
1. | Complete dominance | 2. | Incomplete dominance |
3. | Co-dominance | 4. | Lethality |
Which one of the following can be used to differentiate between kingdoms of living organisms that include multicellular organisms in Whittaker’s five kingdom classification?
1. Nuclear membrane
2. Cell type
3. Body organisation
4. Cell wall
Identify the incorrect statement regarding gymnosperms in general:
1. They are heterosporous
2. Megaspore mother cell is differentiated from a cell in the nucellus
3. Multicellular female gametophyte is retained on the megasporangium
4. The male gametophyte has a large number of cells
In Whittaker’s Five Kingdom classification, heterotrophic mode of nutrition is present in members of:
1. | Two kingdoms | 2. | Three kingdoms |
3. | Four kingdoms | 4. | Five kingdoms |
Identify the incorrect statement regarding true bacteria?
1. | As a group, they exhibit maximum metabolic diversity. |
2. | Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur. |
3. | Heterotrophic bacteria are the most abundant in nature. |
4. | Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores. |
Chemosynthestic autotrophic bacteria:
I. Produce ATP by oxidizing inorganic substances
II. Play a great role in recycling nutrients like nitrogen, phosphorus, iron and sulfur
1. Both I and II are correct | 2. Only I is correct |
3. Only II is correct | 4. Both I and II are incorrect |
Identify the incorrect statement regarding the blood vascular system of cockroach:
1. Blood vessels are poorly developed and open into hemocoel
2. The hemolymph is composed of colorless plasma and hemocytes
3. Heart lies along the mid-ventral line of thorax and abdomen
4. Blood from sinuses enter heart through ostia
The number of correct statements regarding hemichordates from the given is:
I. | A stomochord is present in the collar region |
II. | Circulation is of open type |
III. | Excretory organ is proboscis gland |
IV. | Development is indirect |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
Fibres are likely to be absent in
1. Secondary phloem
2. Secondary Xylem
3. Primary phloem
4. Leaves
The placenta is attached to the developing seed near the
1. Testa
2. Hilum
3. Micropyle
4. Chalaza
Generally, monocotyledonous seeds are endospermic. An important exception may be:
1. | Rice | 2. | Wheat |
3. | Orchids | 4. | Pea |
Which of the following is not a feature of Ctenophora?
1. Diploblastic organisms with tissue level of organization
2. Absence of Cnidocytes
3. Presence of internal ciliated comb plates
4. Bio-luminescence well marked in some members
Lichens are association of:
1. | Bacteria and fungus | 2. | Alga and bacterium |
3. | Fungus and alga | 4. | Fungus and virus |
Algal blooms impart a distinct colour to water due to:
1. | Their pigments |
2. | Excretion of coloured substances |
3. | Formation of coloured chemicals in water facilitated by physiological degradation of algae |
4. | Absorption of light by algal cell wall |
The device, normally used to remove gaseous pollutants from polluted air but can remove large particulate matter as well, is:
1. electrostatic precipitator
2. cyclonic separator
3. trajectory separator
4. Scrubber
Which award is given to individuals or communities from rural areas that have shown extraordinary courage and dedication in protecting wildlife?
1. Venu Menon Animal Allies Award
2. Amrita Devi Bishnoi Award
3. David Shepherd Wildlife Award
4. The Pledge Award
Which of the below-mentioned regions exhibit less seasonal variations?
1. | Tropics | 2. | Temperate |
3. | Alpines | 4. | Both (1) & (2) |
The zone at the edge of a lake or ocean which is alternatively exposed to air and immersed in water is called?
1. | Pelagic zone | 2. | Benthic zone |
3. | Lentic zone | 4. | Littoral zone |
Which of the following pyramids can never be inverted in any ecosystem?
1. Pyramid of numbers
2. Pyramid of biomass
3. Pyramid of energy
4. All ecological pyramids can be inverted
When population density is plotted against time, the exponential growth curve is:
1. | S shaped | 2. | Straight line |
3. | J shaped | 4. | Hyperbola |
Pyruvic acid, the key product of glycolysis can have many metabolic fates. Under aerobic condition, it forms
1. | Lactic acid | 2. | CO2 + H2O |
3. | Acetyl CoA + CO2 | 4. | Ethanol + CO2 |
Which light range is most effective in photosynthesis?
1. Blue | 2. Green |
3. Red | 4. Violet |
Based on the figure given below, which of the following statement is not correct?
1. Movement of solvent molecules will take place from chamber A to B
2. Movement of solute will take place from A to B
3. Presence of a semipermeable is a prerequisite for this process to occur
4. The direction and rate of osmosis depends on both the pressure gradient and concentration gradient
Hormones secreted by the placenta to maintain pregnancy are
1. hCG,hPL, progestogens, estrogens
2. hCG, hPL, estrogen, relaxin, oxytocin
3. hCG, hPL, progestogens, prolactin
4. hCG, progestogens, estrogens, glucocorticoids
When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed
1. Convergent evolution
2. Divergent evolution
3. Microevolution
4. Co-evolution
The figure below is the diagrammatic representation of the E.Coli vector pBR 322. Which one of the given options correctly identifies its certain component(s)?
1. ori - original restriction enzyme
2. rop-reduced osmotic pressure
3. Hind III, EcoRI - selectable markers
4. ampR, tetR- antibiotic resistance genes
Select the two correct statements out of the four (a-d) given below about lac operon :
(a) | Glucose or galactose may bind with the repressor and inactivate it. |
(b) | In the absence of lactose, the repressor binds with the operator region. |
(c) | The z-gene codes for permease. |
(d) | This was elucidated by Francois Jacob and Jacque Monod. |
The correct statements are :
1. | (a) and (c) | 2. | (b) and (d) |
3. | (a) and (b) | 4. | (b) and (c) |
Flowers that have a single ovule in the ovary and are packed into inflorescence are usually pollinated by:
1. | Water | 2. | Bee |
3. | Wind | 4. | Bat |
Advantage of cleistogamy is :
1. More vigorous offspring
2. No dependence of pollinators
3. Vivipary
4. Higher genetic variability
The genetically-modified (GM) brinjal in India has been developed for
1. Enhancing shelf life
2. Enhancing mineral content
3. Drought-resistance
4. Insect-resistance
Ringworm in humans is caused by:
1. | Fungi | 2. | Nematodes |
3. | Viruses | 4. | Bacteria |
The genotypes of a Husband and Wife are IAIB and IAi .
Among the blood types of their children how many different genotypes and phenotypes are possible
1. 3 genotypes ; 3 phenotypes
2. 3 genotypes; 4 phenotypes
3. 4 genotypes ; 3 Phenotypes
4. 4 genotypes ; 4 phenotypes
In maize, hybrid vigor is exploited by
1. bombarding the protoplast with DNA
2. crossing of two inbred parental lines
3. harvesting seeds from the most productive plants
4. inducing mutations
Select the correct statement from the following:
1. Biogas commonly called gobar gas is pure methane
2. Activated sludge-sediment in settlement tanks of sewage treatment plant is a rich source of aerobic bacteria
3. Biogas is produced by the activity of aerobic bacteria on animal waste
4. Methanobacterium is an aerobic bacterium found in rumen of cattle
Grafting is not successful in monocots but is successful in dicots because they have:
1. Vascular bundles arranged in a ring
2. Cambium for secondary growth
3. Vessels with elements arranged end to end
4. Cork cambium
Double fertilization is exhibited by :
1. Gymnosperms
2. Algae
3. Fungi
4. Angiosperms
is the floral formula of:
1. Sesbania
2. Petunia
3. Brassica
4. Allium
Match the name of the animal (column I), with one characteristics (column II), and the phylum/class (column III) to which it belongs
Column I |
Column II |
Column III |
|
1. |
Ichthyophis |
terrestrial |
Reptilia |
2. |
Limulus |
body covered by chitinous exoskeleton |
Pisces |
3. |
Adamsia |
radially symmetrical |
Porifera |
4. |
Petromyzon |
ectoparasite |
Cyclostomata |
Photochemical smog does not contain
1. PAN
2. Ozone
3. Nitrogen dioxide
4.
Which one of the following shows maximum genetic diversity in India?
1. Groundnut
2. Rice
3. Maize
4. Mango
Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?
1. Its base is broad
2. It shows energy content of different trophic level organisms
3. It is inverted in shape
4.It is upright in shape
When does the growth rate of a population following the logistic model equal zero? The logistic model is given
As dN/dt=rN(1─N/K)
1. when N/K is exactly one.
2. when N nears the carrying capacity of the habitat.
3. when N/K equals zero.
4. when death rate is greater than birth rate.
Select the correct option describing gonadotropin activity in a normal pregnant female
1. High level of FSH and LH stimulates the thickening of endometrium
2. High level of FSH and LH facilitate implantation of the embryo
3. High level of HCG stimulates the synthesis of estrogen and progesterone
4. High level of HCG stimulates the thickening of endometrium
In human adult females, oxytocin
1. is secreted by anterior pituitary
2. Stimulates growth of mammary glands
3. Stimulates pituitary to secrete vasopressin
4. causes strong uterine contractions during parturition
Which of the following nucleic acids is present in an organism having 70 S ribosomes only?
1. Single stranded DNA with protein coat
2. Double stranded circular naked DNA
3. Double stranded DNA enclosed in nuclear membrane
4. Double stranded circular DNA with histone proteins
Which of the following conditions will stimulate parathyroid gland to release parathyroid hormone ?
1. Fall in active Vitamin D levels
2. Fall in blood Ca+2 levels
3. Fall in bone Ca+2 levels
4. Rise in blood Ca+2 levels
In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?
1. Thalassemia
2. Kleinfelter's Syndrome
3. Phenylketonuria
4. Turner's Syndrome
"Ramachandran plot" is used to confirm the structure of
1. RNA | 2. Proteins |
3. Triacylglycerides | 4. DNA |
What will be the direction of flow of water when a plant cell is placed in a hypotonic solution?
1. Water will flow in both directions.
2. Water will flow out of the cell.
3. Water will flow into the cell.
4. No flow of water will happen in any direction.
Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from a respiratory disorder causing wheezing due to:
1. reduction in the secretion of surfactants by pneumocytes
2. benign growth on the mucous lining of nasal cavity
3. inflammation of bronchi and bronchioles
4. proliferation of fibrous tissues and damage of the alveolar walls
Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:
1. PharynxOesophagusIleumCropGizzardColonRectum
2. PharynxOesophagusCropGizzardIleumColonRectum
3. PharynxOesophagusGizzardCropIleumColonRectum
4. PharynxOesophagusGizzardIleumCropColonRectum
Which of the following sexually transmitted diseases is not completely curable?
1. Chlamydiosis
2. Gonorrhoea
3. Genital warts
4. Genital herpes
What is the site of perception of photoperiod necessary for induction of flowering in plants?
1. Leaves
2. Lateral buds
3. Pulvinus
4. Shoot apex
Which of the following factors is responsible for the formation of concentrated urine?
1. Hydrostatic pressure during glomerular filtration.
2. Low levels of antidiuretic hormone.
3. Maintaining hyperosmolarity towards inner medullary interstitium in the kidneys.
4. Secretion of erythropoietin by Juxtaglomerular complex.
The correct sequence of phases in cell cycle is:
1.
2.
3.
4.
(a) | Crypts of Lieberkuhn | (i) | Pancreas |
(b) | Glisson’s Capsule | (ii) | Duodenum |
(c) | Islets of Langerhans | (iii) | Small intestine |
(d) | Brunner’s Glands | (iv) | Liver |
(a) | (b) | (c) | (d) | |
1. | (iii) | (ii) | (i) | (iv) |
2. | (iii) | (i) | (ii) | (iv) |
3. | (ii) | (iv) | (i) | (iii) |
4. | (iii) | (iv) | (i) | (ii) |
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following :
1. Tyloses in vessels
2. Closure of stomata
3. Flaccidity of bulliform cells
4. Shrinkage of air spaces in spongy mesophyll
Match Column I and Column II :
Column-I | Column-II |
(a) P-wave | (i) Depolarisation of ventricles |
(b) QRS complex | (ii) Repolarisation of ventricles |
(c) T-wave | (iii) Coronary ischemia |
(d) Reduction in the size of T-wave | (iv) Depolarisation of atria |
(v) Repolarisation of atria |
Select the correct option:
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (v) | (iv) |
2. | (iv) | (i) | (ii) | (iii) |
3. | (iv) | (i) | (ii) | (v) |
4. | (ii) | (i) | (v) | (iii) |
Which of the following muscular disorders is inherited?
1. Botulism
2. Tetany
3. Muscular dystrophy
4. Myasthenia gravis
Which part of the brain is responsible for thermoregulation?
1. Medulla oblongata
2. Cerebrum
3. Hypothalamus
4. Corpus callosum
Respiratory Quotient (RQ) value of tripalmitin is:
1. 0.09
2. 0.9
3. 0.7
4. 0.007
Match the following concerning essential elements and their functions in plants :
(a) | Iron | (i) | Photolysis of water |
(b) | Zinc | (ii) | Pollen germination |
(c) | Boron | (iii) | Required for chlorophyll biosynthesis |
(d) | Manganese | (iv) | IAA biosynthesis |
Select the correct option:
(a) | (b) | (c) | (d) | |
1. | (iv) | (iii) | (ii) | (i) |
2. | (iii) | (iv) | (ii) | (i) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (ii) | (i) | (iv) | (iii) |
Choose the correct pair from the following :
1. | Polymerases | - | Break the DNA into fragments |
2. | Nucleases | - | Separate the two strands of DNA |
3. | Exonucleases | - | Make cuts at specific positions within DNA |
4. | Ligases | - | Join the two DNA molecules |
In light reaction, plastoquinone facilitates the transfer of electrons from:
1. | Cyt b6f complex to PS-I | 2. | PS-I to NADP+ |
3. | PS-I to ATP synthase | 4. | PS-II to Cytb6f complex |