Mycorrhiza is a symbiotic association of fungus with root system which helps in:
A. Absorption of water | B. Mineral nutrition |
C. Translocation | D. Gaseous exchange |
1. Only A | 2. Only B |
3. Both A and B | 4. Both B and C |
Which pigment acts directly to convert light energy to chemical energy ?
1. | Chlorophyll a | 2. | Chlorophyll b |
3. | Xanthophylls | 4. | Carotenoid |
Phosphorylation of glucose during glycolysis is catalysed by
1. Phosphoglucomutase | 2. Phosphoglucoisomerase |
3. Hexokinase | 4. Phosphorylase |
All the following are correct about the exponential growth of population except:
1. | It is represented by the equation dt/dN = rN |
2. | Resources in the habitat are unlimited |
3. | The rate of natural increase is represented by “r” |
4. | In 1981, the ‘r’ value for human population in India was 0.0205 |
Which of the following group exhibit more species diversity?
1. | Gymnosperms | 2. | Algae |
3. | Bryophytes | 4. | Fungi |
Amensalism is an association between two species where:
1. One species is harmed and the other is benefitted
2. One species is harmed and the other is unaffected
3. One species is benefitted and the other is unaffected
4. Both species are harmed
Which of the following components provides sticky character to the bacterial cell?
1. Cell wall
2. Nuclear membrane
3. plasma membrane
4. Glycocalyx
Which of the following is an endospermic seed?
1. | Bean | 2. | Gram |
3. | Pea | 4. | Castor |
Which of the events listed below is not observed during mitosis?
1. Chromatin condensation
2. Movement of centrioles to opposite poles
3. Appearance of chromosomes with two chromattids joined together at the centromere
4. Crossing over
Many pulses of daily use belong to one of the families below (tick the correct answer)
1. Solanaceae
2. Fabaceae
3. Liliaceae
4. Poceae
A plant tissue, when stained, showed the presence of hemicellulose and pectin in cell wall of its cells. The tissue represents
1. Collenchyma
2. Sclerenchyma
3. Xylem
4. Meristem
The terms ‘bracket fungi’ or ‘pufballs’ is used for some of the members of the class:
1. | Phycomycetes | 2. | Ascomycetes |
3. | Basidiomycetes | 4. | Deuteromycetes |
All the following regarding Pinus are correct except:
1. Obligate association with mycorrhiza
2. Unbranched stems
3. Male and female strobili on the same plant
4. Leaves in fascicles
A store house of collected plant specimens that are dried, pressed and preserved on sheets is called as:
1. Herbarium
2. Monograph
3. Flora
4. Manual
Which of the following is not used as a biopesticide?
1. Xanthomonas campestris
2. Bacillus thuringiensis
3. Trichoderma harzianum
4. Nucleopolyhedrovirus
Among the following characters, which one was not considered by Mendel in his experiments on pea?
1. Stem - Tall or Dwarf
2. Trichomes - Glandular or non-glandular
3. Seed - Green or Yellow
4. Pod - Inflated or Constricted
Megasporangium is equivalent to :
1. Fruit
2. Nucellus
3. Ovule
4. Embryo sac
The one aspect which is not a salient feature of genetic code, is its being
1. Ambiguous
2. Universal
3. Specific
4. Degenerate
Mutations that arise due to changes in a single base pair of DNA are called as:
1. | Chromosomal aberrations | 2. | Point mutations |
3. | Nonsense mutations | 4. | Frameshift mutations |
A typical angiosperm embryosac, at maturity, is:
1. | 8 celled and 8 nucleate | 2. | 8 celled and 7 nucleate |
3. | 7 celled and 8 nucleate | 4. | 7 celled and 7 nucleate |
Majority of plants:
1. | Use abiotic agents for pollination |
2. | Use biotic agents for pollination |
3. | Do not use any agent for pollination |
4. | Use both abiotic and biotic agents for pollination. |
How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE?
1. | 4 | 2. | 8 |
3. | 16 | 4. | 32 |
The last of 24 human chromosomes to be sequenced was:
1. Chromosome 1 and completed in 2003
2. Chromosome 1 and completed in 2006
3. Chromosome X and completed in 2003
4. Chromosome X and completed in 2006
If the base sequence of a codon in mRNA is 5'-AUG-3', the sequence of tRNA pairing with it must be:
1. 5'-UAC-3'
2. 5'-CAU-3'
3. 5'-AUG-3'
4. 5'-GUA-3'
Match each item in Column I [Diazotroph] with the feature in Column II and select the correct answer from the codes given below:
|
COLUMN I |
|
COLUMN II |
A. |
Cyanobacteria |
a. |
Actinorhizal symbiont |
B. |
Frankia |
b. |
Do not form nodules |
C. |
Rhizobium |
c. |
Free-living nitrogen fixer |
D. |
Azotobacter |
d. |
Legume symbiont |
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 |
Cells at the end of prophase of mitosis, when viewed under the microscope, do not show:
I. Golgi complexes
II. Endoplasmic reticulum
III. Nucleolus
IV. Nuclear envelope
1. Only I and II are correct
2. Only III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
The main difference between active transport and facilitated diffusion is:
1. In active transport the molecules move from areas of high to areas of low concentration
2. In active transport, you need carrier proteins
3. In active transport, you need ATP to move molecules against a concentration gradient
4. In active transport, only water molecules move
Match the column I with column II.
Column I | Column II | ||
(a) | Golgi apparatus | (i) | Synthesis of protein |
(b) | Lysosomes | (ii) | Trap waste and excretory products |
(c) | Vacuoles | (iii) | Formation of glycoproteins and glycolipids |
(d) | Ribosomes | (iv) | Digesting biomolecules |
Choose the right match from options given below:
(a) | (b) | (c) | (d) | |
1. | (iii) | (iv) | (ii) | (i) |
2. | (iv) | (iii) | (i) | (ii) |
3. | (iii) | (ii) | (iv) | (i) |
4. | (i) | (ii) | (iv) | (iii) |
Xylem translocates:
1. Water, mineral salts, some organic nitrogen and hormones
2. Water only
3. Water and mineral salts only
4. Water, minerals and some organic nitrogen only
It takes very long time for pineapple plants to produce flowers. Which combination of hormones can be applied to artificially induce flowering in pineapple plants throughout the year to increase yield?
1. Cytokinin and Abscisic acid
2. Auxin and Ethylene
3. Gibberellin and Cytokinin
4. Gibberellin and Abscisic acid
Cells in phase:
1. terminate the cell cycle
2. exit the cell cycle
3. enter the cell cycle
4. suspend the cell cycle
If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is bp, then the length of the DNA is approximate:
1. | 2.5 meters | 2. | 2.2 meters |
3. | 2.7 meters | 4. | 2.0 meters |
The number of substrate-level phosphorylations in one turn of a citric acid cycle is
1. | One | 2. | Two |
3. | Three | 4. | Four |
The product(s) of the reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are.
1. Nitrate alone
2. Ammonia and oxygen
3. Ammonia and hydrogen
4. Ammonia alone
The oxygenation activity of RuBisCO enzyme in photorespiration leads to the formation of:
1. 1 molecule of the 3-C compound
2. 1 molecule of the 6-C compound
3. 1 molecule of a 4-C compound and 1 molecule of the 2-C compound
4. 2 molecules of the 3-C compound
In gram negative bacteria the outer membrane:
1. is the major permeability barrier
2. is a thick peptidoglycan layer
3. is more permeable to hydrophilic substances
4. is devoid of lipopolysaccharides
Gause’s principle of competitive exclusion states that:
1. | more abundant species will exclude the less abundant species through competition. |
2. | competition for the same resources excludes species having different food preferences. |
3. | no two species can occupy the same niche indefinitely for the same limiting resources. |
4. | larger organisms exclude smaller ones through competition. |
Which of the following type of ecosystem is expected in an area where evaporation exceeds precipitation, and mean annual rainfall is below 100 mm?
1. Grassland
2. Shrubby forest
3. Desert
4. Mangrove
A renewable exhaustible natural resource is
1. Petroleum
2. Minerals
3. Forest
4. Coal
Blue-baby syndrome results from
1. Excess of ODS
2. Excess of chlorides
3. Excess of dissolved oxygen
4. Methaemoglobin
Nuisance growth of aquatic plants and bloom-forming algae in natural waters is generally due to high concentrations of:
1. | Carbon | 2. | Sulphur |
3. | Calcium | 4. | Phosphorus |
The Golgi complex plays a major role
1. in digesting proteins and carbohydrates
2. as energy transferring organelles
3. in post translational modification of proteins and glycosidation of lipids
4. in trapping the light and transforming it into chemical energy
Liquid endosperm in coconut forms due to:
1. Failure of cytokinesis after karyokinesis
2. Failure of karyokinesis before cytokinesis
3. Disruption of spindle fibers at metaphase
4. Continued DNA replication during cytokinesis
In which set of organisms does external fertilization occur
1. Echinodermata and mosses
2. Hemichordata and ferns
3. Amphibians and algae
4. Reptiles and gymnosperms
In a plant, red fruit (R) is dominant over yellow fruit (r), and tallness (T) is dominant over shortness (t). A plant with RRTt genotype is crossed with a plant of rrtt genotype. The progeny is:
1. All red fruit, tall 25%
2. All red fruit, tall 50%
3. All red fruit and tall 75%
4. All red fruit and tall.
Which one of the following is a wrong statement regarding mutations?
1. Deletion and insertion of base pairs cause frame-shift mutations
2. Cancer cells commonly show chromosomal aberrations
3. UV and Gamma rays are mutagens
4. Change in a single base pair of DNA does not cause mutation
The ovule of an angiosperm is technically equivalent to
1. megaspore
2. megasporangium
3. megasporophyll
4. megaspore mother cell
A typical nucleosome unit consists of about:
1. | 60 base pairs | 2. | 140 base pairs |
3. | 200 base pairs | 4. | 400 base pairs |
Which of the following acts as the substrate and provides energy for DNA replication?
1. | Dideoxyribonucleoside triphospahtes |
2. | Ribonucleoside triphosphates |
3. | Deoxyribonucleoside triphospahtes |
4. | Deoxyribonucleotide triphosphates |
The algae Spirulina, Chlorella and the microbe Methylophilus methylotrophus can be used as a source of:
1. | Vitamin A and C | 2. | Minerals like calcium |
3. | Single Cell Protein | 4. | Omega 3 fatty acids |
A health disorder that results from the deficiency of thyroxine in adults and characterized by
(i) a low metabolic rate
(ii) increase in body weight
(iii) tendency to retain water in tissues is
1. hypothyroidism | 2. simple goitre |
3. myxoedema | 4. cretinism |
The main function of mammalian corpus luteum is to produce
1. estrogen only
2. progesterone
3. human chorionic gonadotropin
4. relaxin only
Which one of the following organisms is scientifically correctly named, correctly printed according to the International Rules of Nomenclature and is correctly described?
1. Musca domestica - The common house lizard, a reptile
2. Plasmodium falciparum - A protozoan pathogen causing the most serious type of malaria
3. Felis tigris - The Indian tiger, well protected in Gir forests.
4. E.coli - Full name Escherichia coli, a commonly occurring bacterium in human intestine
Which of the following is not a feature of Cnidaria?
1. Radially symmetrical animals
2. Gastro-vascular cavity with a single opening
3. Presence of cells that contain stinging capsules
4. Some have asexually reproducing medusa
All the following would be characteristics of a general reptile except:
1. Dermal scales or scutes
2. Poikilothermy
3. Direct development
4. Heart is usually three chambered
The respiratory system of cockroach consists of a network of tracheae that open through how many spiracles present on the lateral side of the body?
1. 5
2. 5 pairs
3. 20
4. 20 pairs
Consider the following four statements (a-d) regarding kidney transplants and select the two correct ones out of these.
(a) Even if a kidney transplant is proper the recipient may need to take immuno-suppressants for a long time
(b) The cell-mediated immune response is responsible for the graft rejection
(c) The B- lymphocytes are responsible for rejection of the graft
(d) The acceptance or rejection of a kidney transplant depends on specific interferons
The two correct statements are
1. (c) and (d)
2. (a) and (c)
3. (a) and (b)
4. (b) and (c)
Which one of the following is commonly used in transfer of foreign DNA into crop plants?
1. Penicillium expansum
2. Trichoderma polysporum
3. Meloidogyne incognita
4. Agrobacterium tumefaciens
PCR and Restriction Fragment Length Polymorphism are the methods for:
1. Study of enzymes
2. Genetic transformation
3. DNA sequencing
4. Genetic Fingerprinting
The most common opportunistic infection associated with AIDS is :
1. Tuberculosis
2. Pneumocystis carinii pneumonia
3. Cryptococcal meningitis
4. Toxoplasma encephalitis
Which of the following is a recombinant protein?
1. | Beta Galactosidase in E.coli | 2. | Insulin in humans |
3. | Somatotropin in humans | 4. | Interferon in E. coli |
In the given diagram of pBR322, the location of the recognition sequences of BamH I and Sal I are represented by the numbers:
|
The property of the water molecule that is most important for the maintenance of homeostasis in living organisms is:
1. High latent heat of vaporization
2. High latent heat of fusion
3. High specific heat
4. Liquid form more dense than solid form
Hormones which interact with intracellular receptors:
1. generate second messengers
2. depolarize the membrane of the target cells
3. stop the enzymatic actions of membrane proteins
4. regulate gene expression
The ovaries are located:
1. | In a sac outside the body | 2. | In the lower abdomen |
3. | In the upper abdomen | 4. | In the thorax |
“Saheli” is a:
1. | NGO working for female child rights |
2. | Mid-wife working in villages to help with child immunization |
3. | A national helpline number for the prevention of crimes against wome |
4. | New oral contraceptive for females |
What part of the early embryo differentiates into the three germ layers?
1. | The trophoblast cells | 2. | Inner cell mass |
3. | Both | 4. | None |
The cranial meninge that is in contact with the brain tissue is the:
1. Dura mater | 2. Arachanoid mater |
3. Pia mater | 4. Grey matter |
Identify the correct statement regarding the sections of the spinal cord shown in the given diagram:
I. A and D are part of the grey mater
II. B is motor and C is sensory
1. Only I | 2. Only II |
3. Both I and II | 4. Neither I nor II |
The second most common formed elements in the human blood are:
1. Proteins | 2. Water |
3. RBC | 4. Thrombocytes |
The respiratory diffusion membrane is made of all the following layers except:
1. Alveolar epithelium | 2. Basement layer |
3. Vascular endothelium | 4. Surfactant |
All the following animals are uricotelic except:
1. Reptiles | 2. Land snails |
3. Birds | 4. Marine fishes |
Most renal calculi are:
1. | oxalates | 2. | citrates |
3. | urates | 4. | carbonates |
With respect to the human skeleton, the largest ‘foramen’ will be the:
1. foramen magnum
2. optic foramen
3. obturator foramen
4. mandibular foramen
To facilitate absorption of end products of fat digestion, bile salts combine with fatty acids to form complexes called:
1. chylomicrons
2. micelles
3. globules
4. lipoproteins
The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:
1. Bronchioles and fallopian tubes
2. Bile duct and bronchioles
3. Fallopian tubes and pancreatic duct
4. Eustachian tube and salivary duct
Which of the following contraceptive methods do involve a role of hormone?
1. Pills, Emergency contraceptives, barrier methods
2. Lactational amenorrhea, Pills, Emergency contraceptives
3. Barrier method, Lactational amenorrhea, pills
4. CuT, Pills, Emergency contraceptives
Tidal Volume and Expiratory Reserve Volume of an athlete are 500 mL and 1000 mL respectively. What will be his Expiratory Capacity if the Residual Volume is 1200 mL?
1. | 2700 mL | 2. | 1500 mL |
3. | 1700 mL | 4. | 2200 mL |
Which of the following glucose transporters is insulin-dependent?
1. GLUT IV
2. GLUT I
3. GLUT II
4. GLUT III
Use of an artificial kidney during hemodialysis may result in:
(a) Nitrogenous waste build-up in the body
(b) Non-elimination of excess potassium ions
(c) Reduced absorption of calcium ions from gastro-intestinal tract
(d) Reduced RBC production
Which of the following options is the most appropriate ?
1. (a) and (d) are correct
2. (a) and (b) are correct
3. (b) and (c) are correct
4. (c) and (d) are correct
Consider the following statements:
(A) Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group
(B) A complete catalytic enzyme with its bound prosthetic group is called apoenzyme
Select the correct option
1. (A) is false but (B) is true
2. Both (A) and (B) are true
3. (A) is true but (B) is false
4. Both (A) and (B) are false
Which of the following statements is correct?
1. Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye
2. Cornea is an external, transparent and protective proteinacious covering of the eye-ball
3. Cornea consists of dense connective tissue of elastin and can repair itself
4. Cornea is convex, transparent layer which is highly vascularised
Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes.
1. Duodenal cells
2. Chief cells
3. Goblet cells
4. Oxyntic cells
Select the correct option.
1. There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs.
2. 8th, 9th and 10th pairs of ribs articulate directly with the sternum.
3. 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage.
4. Each rid is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
What would be the heart rate of a person if the cardiac output is 5L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?
1. 125 beats per minute | 2. 50 beats per minute |
3. 75 beats per minute | 4. 100 beats per minute |
An oocyte is released from the ovary under the influence of LH :
1. | after completing meiosis and before the polar bodies are released |
2. | after completing meiosis I and before the release of the polar body |
3. | after completing meiosis |
4. | after completing meiosis I and after the release of the polar body |
The living state is synonymous with:
1. Cellular organization
2. Metabolism
3. Consciousness
4. Reproduction
Which of the following bacteria is not a source of restriction endonuclease?
1. | Haemophilusinfluenzae | 2. | Escherichia coli |
3. | Entamoeba coli | 4. | Bacillus amyloliquefaciens |
What is common to whale, seal and shark?
1. Homoiothermy
2. Seasonal migration
3. Thick subcutaneous fat
4. Convergent evolution
Active immunity develops when:
1. A host is exposed to antigens
2. Antigen presenting cells first encounter the antigen
3. T helper cells activate B cells to produce antibodies
4. When a child gets vaccinated for the first time
Regarding out-breeding, the number of correct statements is:
I. | Out-crossing is the practice of mating of animals within the same breed, but having no common ancestors on either side of their pedigree up to 4-6 generations. |
II. | Out-crossing is the best breeding method for animals that are below average in productivity in milk production, growth rate in beef cattle, etc. |
III. | A single outcross often helps to overcome inbreeding depression. |
IV. | In cross-breeding superior males of one breed are mated with superior females of another breed. |
V. | Cross-breeding allows the desirable qualities of two different breeds to be combined. |
1. | 2 | 2. | 3 |
3. | 4 | 4. | 5 |
Though we cannot be certain, what can be the probable reason/s for the sudden disappearance of dinosaurs from the Earth?
I: | Climatic changes killed them |
II: | Most of them evolved into birds |
1. | I only | 2. | II only |
3. | Both I and II | 4. | Neither I nor II |
Adenine was synthesized by Orgel, using the Miller apparatus, when he used the gas :
1. carbon dioxide
2. hydrogen cyanide
3. hydrogen sulfide
4. nitrogen
A thorn of Bougainvillea and a tendril of Cucurbita are an example of :
1. | analogous organs | 2. | vestigial organs |
3. | homologous organs | 4. | defense organs |
The amnion of mammalian embryo is derived from
1. Mesoderm and trophoblast
2. Endoderm and mesoderm
3. Ectoderm and mesoderm
4. Ectoderm and endoderm
Which hormone is antagonistic to insulin regarding its effects on carbohydrate, fat and protein metabolism?
1. Glucagon | 2. Growth hormone |
3. Melatonin | 4. Cortisol |
Most sensory receptors function by producing depolarising potentials. Which of the following function by hyperpolarization rather than depolarization?
1. proprioceptors
2. nociceptors
3. olfactory receptors
4. rods and cones
When anti B antibodies are present in the plasma and A antigens on the surface of RBCs of a person, her blood group can be:
1. A and AB | 2. Only A |
3. Only B | 4. O |
The binding of carbon dioxide to hemoglobin:
I. is related to the partial pressure of carbon dioxide
II. is affected by the partial pressure of oxygen
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
What is usually used to treat osteomalacia?
1. Estrogen
2. Androgens
3. Vitamin D
4. Calcium