The process of guttation takes place
1. When the root pressure is high and the rate of transpiration is low
2. When the root pressure is low and the rate of transpiration is high
3. When the root pressure equals the rate of transpiration
4. When the root pressure as well as rate of transpiration are high
Identify the correctly matched rows:
C3 | C4 | ||
I. | Productivity | Low | High |
II. | CO2 compensation point | Low | Low |
III. | Temperature optimum | 20 – 250 C | 30 – 450 C |
1. Only I and II | 2. Only I and III |
3. Only II and III | 4. I, II and III |
During which stage in the complete oxidation of glucose, is the greatest number of ATP molecules formed from ADP?
1. Glycolysis
2. Krebs cycle
3. Electron transport
4. Conversion of pyruvic acid to acetyl CoA
The respiratory pathway is best described as:
1. | Catabolic | 2. | Anabolic |
3. | Amphibolic | 4. | Amphipathic |
The tiger census in our national parks and tiger reserves is often based on:
1. | Pug marks | 2. | Cub count |
3. | Area allocation | 4. | Collar position |
Which of the following forests is known as the ‘lungs of the planet Earth’?
1. | Taiga forest | 2. | Tundra forest |
3. | Amazon rainforests | 4. | Rainforests of North East India |
A protozoan reproduces by binary fission. What will be the number of protozoans in its population after six generations?
1. | 128 | 2. | 24 |
3. | 64 | 4. | 32 |
Study the four statements (A – D) given below and select the two correct ones out of them:
A. Definition of biological species was given by Ernst Mayr.
B. Photoperiod does not affect reproduction in plants.
C. Binomial nomenclature system was given by R. H. Whittaker.
D. In unicellular organisms, reproduction is synonymous with growth.
The two correct statements are
1. A and B
2. B and C
3. C and D
4. A and D
The fruit in mango is:
1. Silicula
2. Aril
3. Drupe
4. Berry
A bivalent of meiosis- I consists of
1. Two chromatids and one centromere
2. Two chromatids and two centromeres
3. Four chromatids and two centromeres
4. Four chromatids and four centromeres
Venation is a term used to describe the pattern of arrangement of
1. Floral organs
2. Flower in inflorescence
3. Veins and veinlets in a lamina
4. All of them
How many shoot apical meritsems are likely to be present in a twig of a plant possessing, 4 branches and 26 leaves
1. 26
2. 1
3. 5
4. 30
Identify the incorrect statement regarding cyanobacteria:
1. They have chlorophyll a similar to green plants
2. Colonies surrounded by pellicle – a protein rich layer
3. Often form blooms in polluted water bodies
4. Fix nitrogen in specialized cells called hetrocysts
Coralloid roots in Cycas are associated with nitrogen fixing:
1. | Rhizobium | 2. | Frankia |
3. | Azospirillum | 4. | Cyanobacteria |
If two living animals belong to the same phylum, they must belong to the same:
1. Class | 2. Genus |
3. Kingdom | 4. Family |
Trichoderma harzianum has proved a useful microorganism for:
1. Biological control of soil-borne plant pathogens
2. Bioremediation of contaminated soils
3. Reclamation of wastelands
4. Gene transfer in higher plants
The mechanism that causes a gene to move from one linkage group to another is called
1. Crossing-over
2. inversion
3. duplication
4. translocation
What is the function of germ pore?
1. Emergence of radicle
2. Absorption of water for seed germination
3. Initiation of pollen tube
4. Release of male gametes
Semiconservative replication of DNA was first demonstrated in
1. Salmonella typhimurium
2. Drosophila melangaster
3. Escherichia coli
4. Streptococcus pneumonia
When there is a change in the chromosome number such that the changes number is not an exact multiple of base number [haploid number], the condition is called as:
1. | Euploidy | 2. | Aneuploidy |
3. | Aberration | 4. | Non-disjunction |
In most prokaryotes, the transcription unit is:
1. | Mono-cistronic | 2. | Poly-cistronic |
3. | Multi-cistronic | 4. | Uni-cistronic |
At what temperature pollens can be stored for years in liquid nitrogen?
1. | 0°C | 2. | -100°C |
3. | -196°C | 4. | 4°C |
Division of functional megaspore can be described as:
1. | Three free nuclear mitotic divisions. |
2. | One meiotic and two mitotic divisions, all free nuclear. |
3. | Three cytoplasmic mitotic divisions. |
4. | One meiotic and two mitotic divisions, meiotic being cytoplasmic and mitotic being free nuclear. |
Assuming complete dominance
recessiveness and independent assortment,
the ratio of progeny with the genotypes AaBb,
AABb, Aabb and aaBb from a cross AaBb X
AABb would respectively be:
1. 4:4:2:0
2. 4:2:4:2
3. 4:4:2:2
4. 4:4:2:1
If the sequence of nitrogen bases of the coding strand of DNA in a transcription unit is:
5' -ATGAATG-3',
the sequence of bases in its RNA transcript would be;
1. 5'-AUGAAUG-3'
2. 5'-UACUUAC-3'
3. 5'-CAUUCAU-3'
4. 5'-GUAAGUA-3'
Match each item in Column I [Bio-control agent] with the pest/pathogen in Column II and select the correct answer from the codes given below:
|
COLUMN I |
|
COLUMN II |
A. |
Ladybird |
a. |
Aphids |
B. |
Dragonflies |
b. |
Mosquitoes |
C. |
Bacillus thuringiensis |
c. |
Butterfly caterpillars |
D. |
Trichoderma |
d. |
Fungi |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | c | d |
3. | a | b | d | c |
4. | b | a | d | c |
Identify the correct statement regarding meiosis amongst the following:
I. Meiosis involves two sequential cycles of nuclear and cell divisions but only a single cycle of DNA replication.
II. Meiosis II is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S phase.
III. Meiosis involves pairing of bivalents and recombinations between them.
1. | I only | 2. | I and II only |
3. | I and III only | 4. | I, II and III |
The component molecules of the cell membrane have two main parts, the head and the tail. These parts are either hydrophobic (repelled by water) or hydrophilic (attracted to water). Which is which?
1. | Hydrophilic Head and Hydrophobic Tail |
2. | Both Hydrophobic |
3. | Hydrophilic Tail and Hydrophobic Head |
4. | Both Hydrophilic |
The shorter and longer arms of submetacentric chromosome are referred to as:
1. m-arm and n-arm respectively
2. s-arm and l-arm respectively
3. p-arm and q-arm respectively
4. q-arm and p-arm respectively
The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and early morning is:
1. Root pressure
2. Imbibition
3. Plasmolysis
4. Transpiration
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
1. | Gibberellin | 2. | Ethylene |
3. | Abscisic acid | 4. | Cytokinin |
Identify the correct statement with regard to phase (Gap 1) of interphase.
1. The reorganisation of all cell components takes place.
2. The cell is metabolically active, grows but does not replicate its DNA
3. Nuclear division takes place
4. DNA synthesis or replication takes place.
The first phase of translation is:
1. Recognition of DNA molecule
2. Aminoacylation of tRNA
3. Recognition of an anti-codon
4. Binding of mRNA to ribosome
Phycoerythrin is the major pigment in :
1. Red algae
2. Blue-green algae
3. Green algae
4. Brown algae
Which of the following element helps in maintaining the structure of ribosomes?
1. Magnesium | 2. Zinc |
3. Copper | 4. Molybdenum |
Substances that have a hydrophilic moiety:
1. have to be transported across the plasma membrane by active transport
2. can diffuse across the plasma membrane at a slower rate, if larger in size
3. do not need a concentration gradient to diffuse across the plasma membrane
4. need to be facilitated even along the concentration gradient
Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of
Migratory birds from Siberia and other extremely cold northern regions move to:
1. Western Ghat
2. Meghalaya
3. Corbett national park
4. Keoladeo national park
The sequence of communities of primary succession in water is :
1. | Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses, and trees. |
2. | Phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses, and trees. |
3. | Free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses, and trees. |
4. | Phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamp, sedges, meadow, and trees. |
Exotic species introduced in India are:
1. Lantana camara, Water Hyacinth
2. Water Hyacinth, Prosopis cineraria
3. Nile Perch, Ficus religiosa
4. Ficus religiosa, Lantana camara
Limit of BOD prescribed by Central Pollution Control Board for discharge of industrial and municipalwaste waters into natural surface waters is
1. < 3.0 ppm
2. < 10 ppm
3. < 30 ppm
4. < 100 ppm
Which one of the following impurities is easiest to remove from wastewater?
1. | Bacteria | 2. | Colloids |
3. | Dissolved solids | 4. | Suspended solids |
Which one of the following organelle in the figure correctly matches with its function?
1. Golgi apparatus, protein synthesis
2. Golgi apparatus, formation of glycolipids
3. Rough endoplasmic reticulum, protein synthesis
4. Rough endoplasmic reticulum, formation of glycoproteins
Identify the incorrect statement regarding cytokinesis:
1. | Animal cells divide by cleavage furrow |
2. | Cell plate formation takes place during cytokinesis in plant cells |
3. | The cell wall formation in plant cells starts near the existing lateral walls and grows inwards |
4. | At cytokinesis, mitochondria and plastids are distributed between daughter cells |
Which one of the following shows isogamy with nonflagellated gametes?
1. Ectocarpus
2. Ulothrix
3. Spirogyra
4. Sargassum
A mutation at a gene locus changes a character due to change in
1. DNA replication
2. Protein synthesis pattern
3. RNA transcription pattern
4. Protein structure
A normal-visioned man whose father was colour-blind, marries a woman whose father was also colour-
blind. They have their first child as a daughter. What are the chance that this child would be colour–blind?
1. | 100% | 2. | zero percent |
3. | 25% | 4. | 50% |
In majority of angiosperms:
1. | a small central cell is present in the embryo sac |
2. | egg has a filiform apparatus |
3. | there are numerous antipodal cells |
4. | reduction division occurs in the megaspore mother cells |
Which of the following is a pyrimidine base found in DNA?
1. | Adenine | 2. | Guanine |
3. | Uracil | 4. | Cytosine |
Whose cell free system finally helped the genetic code to be deciphered?
1. | Gamow | 2. | Severo Ochoa |
3. | Hargobind Khorana | 4. | Marshall Nirenberg |
Conventional breeding is often constrained by the availability of a limited number of disease-resistance genes that are present and identified in various crop varieties or wild relatives. This is most commonly overcome by:
1. | Inducing mutations | 2. | Somaclonal variations |
3. | Genetic engineering | 4. | Plant introduction |
Which one of the following pairs is incorrectly matched?
1. Glucagon - Beta cells (source)
2. Somatostatin - Delta cells (source)
3. Corpus luteum - Relaxin (secretion)
4. Insulin - Diabetes mellitus (disease)
Which of the following cells during gametogenesis is normally diploid?
1. | Primary polar body |
2. | Spermatid |
3. | Spermatogonia |
4. | Secondary polar body |
Which one of the following pairs of animals are similar to each other pertaining to the feature stated against
them ?
1. Pteropus and Ornithorhynchus– Viviparity
2. Garden lizard and Crocodile - Three chambered heart
3. Ascaris and Ancylostoma - Metameric segmentation
4. Sea horse and Flying fish - Cold blooded (poikilothermal)
An important evolutionary transition that appeared for the first time in Echinoderms is:
1. | Bilateral symmetry | 2. | Radial symmetry |
3. | Tube within a tube plan | 4. | Endoskeleton |
Identify the number of animals that do not have homoiothermy from the list given in the box below:
Aptenodytes, Hemidactylus, Pteropus, Icthyophis, Pterophyllum, Carcharodon, Neophron, Myxine |
1. | 3 | 2. | 4 |
3. | 5 | 4. | 6 |
Anal styles are borne on the:
1. | 9th segment only in female cockroach |
2. | 9th segment only in male cockroach |
3. | 10th segment only in female cockroach |
4. | 10th segment only in male cockroach |
Which one of the following statement is correct?
1. Patients who have undergone surgery are given cannabinoids to relieve pain
2. Benign tumours show the property of metastasis
3. Heroin accelerates body functions
4. Malignant tumours may exhibit metastasis
What is true about Bt toxin?
1. The concerned Bacillus has antitoxins.
2. The inactive protoxin gets converted into active form in the insect gut
3. BT protein exists as active toxin in the Bacillus.
4. The activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication
For transformation, micro-particles coated with DNA to be bombarded with gene gun are made up of:
1. | Silver or Platinum | 2. | Platinum or Zinc |
3. | Silicon or Platinum | 4. | Gold or Tungsten |
Cancer detection is mainly based on:
1. | Radiography | 2. | Ultrasonography |
3. | Magnetic resonance imaging | 4. | Histopathology |
Antisense technology:
1. | selectively blocks the expression of a gene. |
2. | combines genetic material from different species. |
3. | combines organelles and cells. |
4. | alters or transfers cells. |
The ability of plasmids and bacteriophage DNA to replicate within bacterial cells:
1. | depends on a particular or sequence of the main chromosomal DNA |
2. | is possible due to promoter sequence present in the insert |
3. | cannot occur without telomeric sequences |
4. | is independent of the control of chromosomal DNA |
The enzymes that catalyse removal of groups from substrates by mechanisms other than hydrolysis leaving double bonds are called as:
1. | Oxidoreductases | 2. | Hydrolases |
3. | Ligases | 4. | Lyases |
All the following statements regarding parathyroid hormone are correct except:
1. It is a peptide hormone
2. It is regulated by a tropin secreted by anterior pituitary
3. It stimulates the process of bone resorption or demineralization
4. It stimulates calcium absorption from the digested food
In the absence of fertilization, corpus luteum:
1. | Stops secreting progesterone but increases the secretion of estrogen |
2. | Stops secreting estrogen but increases the secretion of progesterone |
3. | Increases the secretion of both progesterone and estrogen |
4. | Degenerates |
Transfer of an ovum collected from a donor into the fallopian tube of another female is called as:
1. | ZIFT | 2. | GIFT |
3. | SUZI | 4. | ICSI |
Which of the following hormones is not secreted by the human placenta?
1. | hCG | 2. | hGH |
3. | hPL | 4. | Progesterone |
The primary commissural region of the brain consisting of white matter tracts that connects the left and right cerebral hemispheres is called as:
1. corpus striatum | 2. corpus luteum |
3. corpus callosum | 4. corpus spongiosum |
What are the bones labeled A, B and C shown in the given diagram?
1. Malleus, Incus and Stapes respectively
2. Anvil, Hammer and Stirrup respectively
3. Stapes, Incus and Malleus respectively
4. Hammer, Stirrup and Anvil respectively
Match each item in Column I with one in Column II and select the correct answer from the codes given:
COLUMN I | COLUMN II | ||
A. | Closure of AV valves | a. | Second heart sound |
B. | Closure of semilunar valves | b. | First heart sound |
C. | Opening of AV valves | c. | Ventricular ejection |
D. | Opening of semilunar valves | d. | Passive ventricular filling |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | c | d |
3. | b | a | d | c |
4. | a | b | d | c |
Which occupational lung disorder can lead to cancer of lung?
1. Silicosis
2. Byssinosis
3. Bagassosis
4. Asbestosis
JG cells can be activated to release renin by all the following except:
1. A fall in glomerular blood flow
2. A fall in glomerular blood pressure
3. An increase in venous return to the heart
4. A fall in GFR
What percent of filtrate is reabsorbed by the renal tubules in human kidneys?
1. | Less than 5% | 2. | About 50% |
3. | About 70% | 4. | More than 99% |
Progressive degeneration of skeletal muscle mostly due to genetic disorder is called:
1. | Myasthenia gravis | 2. | Muscular dystrophy |
3. | Poliomyelitis | 4. | Muscle hyperplasia |
In the given diagram, which numbers depict Cystic duct [CD], Hepatic duct [HD], Common bile duct [CBD], Pancreatic duct [PD] and Sphincter of Oddi [SoD]?
CD | HD | CBD | PD | SoD | |
1. | 9 | 3 | 4 | 7 | 6 |
2. | 3 | 4 | 9 | 6 | 7 |
3. | 4 | 3 | 9 | 6 | 7 |
4. | 3 | 9 | 4 | 7 | 6 |
How does steroid hormone influence the cellular activities?
1. Using aquaporin channels as second messenger
2. Changing the permeability of the cell membrane
3. Binding the DNA and forming a gene-hormone complex
4. Activating cyclic AMP located on the cell membrane
Select the option including all sexually transmitted diseases.
1. Gonorrhoea, Malaria, Genital herpes
2. AIDS, Malaria, Filaria
3. Cancer, AIDS, Syphilis
4. Gonorrhoea, Syphilis, Genital herpes
Cuboidal epithelium with brush border of microvilli is found in :
1. Ducts of salivary glands
2. Proximal convoluted tubule of nephron
3. Eustachian tube
4. Lining of intestine
Which one of the following is the most abundant protein in the animals?
1. | Collagen | 2. | Lectin |
3. | Insulin | 4. | Hemoglobin |
Identify the correct statement with reference to human digestive system
1. Serosa is the innermost layer of the alimentary canal
2. Ileum is a highly coiled part
3. Vermiform appendix arises from duodenum
4. Ileum opens into small intestine
Which of the following would help in prevention of diuresis?
1. Reabsorption of Na+ and water from renal tubules to aldosterone
2. Atrial natriuretic factor causing vasoconstriction
3. Decrease in secretion of renin by JG cells
4. More water reabsorption due to under-secretion of ADH
The QRS complex in a standard ECG represents:
1. Depolarisation of auricles
2. Depolarisation of ventricles
3. Reploarisation of ventricles
4. Repolarisation of auricles
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
1. (c) and (d) | 2. (a), (b) and (d) |
3. only (d) | 4. (a) and (b) |
Match the following columns and select the correct option :
Column I | Column II | ||
(a) | Rods and cones | (i) | Absence of Cones photoreceptor cells |
(b) | Blind Spot | (ii) | Cones are densely packed |
(c) | Fovea | (iii) | Photoreceptor cells |
(d) | Iris | (iv) | Visible coloured portion of the eye |
(a) | (b) | (c) | (d) | |
1. | (iii) | (i) | (ii) | (iv) |
2. | (ii) | (iii) | (i) | (iv) |
3. | (iii) | (iv) | (ii) | (i) |
4. | (ii) | (iv) | (iii) | (i) |
Match the following columns and select the correct option
Column - I Column - II
(a) Gout (i) Decreased levels of estrogen
(b) Osteoporosis (ii) Low ions in the blood
(c) Tetany (iii) Accumulation of uric acid crystals
(d) Muscular (iv) Auto immune dystrophy disorder
(v) Genetic disorder
1. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
2. (a)-(iii), (b)-(i), (c)-(ii), (d)-(v)
3. (a)-(iv), .(b)-(v), (c)-(i), (d)-(ii)
4. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
In the human female, menstruation can be deferred by the administration of:
1. LH only
2. Combination of FSH and LH
3. Combination of estrogen and progesterone
4. FSH only
The blood concentration of glucose in a normal healthy individual is:
1. 3.5 – 4.0 mM | 2. 4.0 – 4.5 mM |
3. 4.2 – 6.1 mM | 4. 5.0 – 5.5 mM |
The significance of the 'heat shock' method in bacterial transformation is to facilitate:
1. | Binding of DNA to the cell wall |
2. | Uptake of DNA through membrane transport proteins |
3. | Uptake of DNA through transient pores in the bacterial cell wall |
4. | Expression of antibiotic resistance gene |
Evolutionary history of an organism is known as
1. Phylogeny
2. Ancestry
3. Paleontology
4. Ontogeny
Graft rejection is due to:
1. Innate immune response
2. Humoral immune response
3. Cell-mediated immune response
4. Auto-immune response
There are several species of honeybees that can be reared. From the options given below identify the species reared in India:
1. | Apisindica | 2. | Apisdorsata |
3. | Trigonairidipennis | 4. | Apismellifera |
Humans appeared during the epoch:
1. Pleistocene
2. Pliocene
3. Miocene
4. Oligocene
The first human like being, the hominid, was called:
1. Homo habilis
2. Homo erectus
3. Homo ergaster
4. Homo neanderthelensis
Lamarck has been criticized mainly on his tenet of:
1. inheritance of acquired characters
2. use and disuse of organs
3. key role played by environment in evolution
4. vital force in the body
Which of these is not an important component of initiation of parturition in humans?
1. Increase in oestrogen and progesterone ratio
2. Synthesis of prostaglandins
3. Release of oxytocin
4. Release of prolactin
Which of the following endocrine glands is under direct neural regulation of hypothalamus?
1. Pineal | 2. Adrenal medulla |
3. Posterior pituitary | 4. Anterior pituitary |
The re-establishment of the resting membrane potential after depolarization is primarily due to:
1. Sodium potassium pump | 2. Influx of sodium |
3. Efflux of potassium | 4. Efflux of sodium |
An Rh –ve person, when exposed to Rh +ve blood:
1. will form antibodies against the Rh antigen
2. will be unaffected
3. will form antibodies against the Rh antigen only on second exposure
4. will receive anti Rh antibodies from the donor
The type of joint that will allow least mobility amongst the following would be:
1. Fibrous joint | 2. Primary cartilaginous joint |
3. Secondary cartilaginous joint | 4. Synovial joint |
Approximately what amount of oxygen is carried in a dissolved state through the plasma by 100 ml of oxygenated blood?
1. 0.6 ml
2. 1.4 ml
3. 4 ml
4. 5 ml