Wooden doors swell up and get stuck during the rainy season. This is due to the phenomenon of
1. imbibition
2. endosmosis
3. capillarity
4. deplasmolysis.
Unlike xylem, the movement of sap in phloem is:
1. essentially unidirectional
2. from a sink to a source
3. independent of movement of water
4. in any direction from source to a sink
An element playing important role in nitrogen fixation is
1. molybdenum
2. copper
3. manganese
4. zinc
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
How many carbon atoms does the primary carbon dioxide acceptor have in C3 photosynthesis?
1. | 2 | 2. | 3 |
3. | 4 | 4. | 5 |
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
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
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
Under unfavorable conditions, many zooplankton species in lakes and ponds are known to enter a stage of suspended development called as:
1. | Dormancy | 2. | Hibernation |
3. | Aestivation | 4. | Diapause |
Which one of the following is not a major characteristic feature of biodiversity hotspots?
1. A large number of species
2. Abundance of endemic species
3. Mostly located in the tropics
4. Mostly located in the polar regions
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 |
During cell growth, DNA synthesis takes place in
1. | M phase | 2. | S Phase |
3. | G1 phase | 4. | G2 phase |
Choose the wrong statement:
1. Neurospora is used in the study of biochemical genetics
2. Morels and truffles are poisonous mushrooms
3. Yeast is unicellular and useful in fermentation
4. Penicillium is multicellular and produces antibiotics
Arrange the following events of meiosis in correct sequence
(a) Crossing over
(b) Synapsis
(c) Terminalisation of chiasmata
(d) Disappearance of nucleolus
1. | (b), (c), (d), (a) | 2. | (b), (a), (d), (c) |
3. | (b), (a), (c), (d) | 4. | (a), (b), (c), (d) |
The condition of stamens in China rose is described as:
1. Polyandrous
2. Monoadelphous
3. Diadelphous
4. Polyadelphous
Identify the family of angiosperms that will have the following floral diagram:
1. Liliaceae
2. Fabaceae
3. Solanaceae
4. Brassicaceae
What would be true for comparison of Anaphase I and Anaphase II of meiosis?
1. Centromere does not split in Anaphase I and homologues separate but centromere splits in Anaphase II and sister chromatids separate.
2. Centromere splits in Anaphase I and homologues separate but centromere does not split in Anaphase II and sister chromatids separate.
3. Paired homologues get attached to spindle from opposite poles in Anaphase I while sister chromatids of individual chromosomes get attached to spindle from opposite poles in Anaphase II.
4. Paired homologues get attached to spindle from opposite poles in Anaphase II while sister chromatids of individual chromosomes get attached to spindle from opposite poles in Anaphase I.
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
African sleeping sickness is caused by a/an:
1. | Amoeboid protozoan | 2. | Flagellated protozoan |
3. | Ciliated protozoan | 4. | Sporozoan |
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
Fragmentation is not a common method of asexual reproduction in:
1. Planaria
2. Hydra
3. Filamentous algae
4. Protonema of moss
Alleles are :
1. true breeding homozygotes
2. different molecular forms of a gene
3. heterozygotes
4. different phenotype
Filiform apparatus is a characteristic feature of:
1. | Suspensor | 2. | Egg |
3. | Synergid | 4. | Zygote |
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.
If there are 999 bases in RNA that code 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?
1. | 1 | 2. | 11 |
3. | 33 | 4. | 333 |
What is F2 phenotypic ratio in a dihybrid cross?
1. | 1 : 1 | 2. | 3 : 1 |
3. | 9 : 3 : 3 : 1 | 4. | 1 : 1 : 1: 1 |
Some amino acids are coded by more than one codon. Hence genetic code is:
1. | Unambiguous | 2. | Non-specific |
3. | Degenerate | 4. | Universal |
Pollen grains lose viability within 30 minutes of their release in some members of:
1. | Rosaceae | 2. | Leguminosae |
3. | Poaceae | 4. | Solanaceae |
Identify the incorrectly matched pair:
Cell | Ploidy | |
1. | Cells of nucellus | Diploid |
2. | Megaspore mother cell | Haploid |
3. | Functional megaspore | Haploid |
4. | Cells of female gametophyte | haploid |
If individuals of genotype AaBbCc are intercrossed, how many different phenotypes can appear in their offspring?
1. | 3 | 2. | 6 |
3. | 8 | 4. | 9 |
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
With reference to human beings, antibiotics are actually:
1. | Anti life | 2. | Pro-life |
3. | Irrelevant to life | 4. | Defining life |
A ribbon-like structure consisting of three protein components and extending across the region of synapsed chromosomes during the prophase of meiosis, is called:
1. | Phragmoplast | 2. | Phragmosome |
3. | Synaptonemal complex | 4. | Recombination nodule |
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.
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.
Annual migration does not occur in the case of
1. Salmon
2. Siberian crane.
3. Salamander.
4. arctic tern.
An inverted pyramid of biomass can be found in which ecosystem?
1. | Forest | 2. | Marine |
3. | Grassland | 4. | Tundra |
The expanded form of DDT is:
1. Dichloro diphenyl trichloroethane
2. Dichloro diethyl trichloroethane
3. Dichloro dipyridyl trichloroethane
4. Dichloro diphenyl tetrachloroacetate
Which one of the following structures between two adjacent cells is an effective transport pathway ?
1. | Plastoquinones | 2. | Endoplasmic reticulum |
3. | Plasmalemma | 4. | Plasmodesmata |
The correct chronology of stages of karyokinesis in mitosis is:
1. Prophase – Anaphase – Metaphase – Telophase
2. Prophase – Metaphase – Anaphase – Telophase
3. Prophase – Metaphase – Telophase – Anaphase
4. Telophase – Anaphase – Metaphase – Prophase
Planaria possesses high capacity of
1. Regeneration
2. Alternation of generations
3. Bioluminescence
4. Metamorphosis
Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage ?
1. Erythroblastosisfetalis – X- linked
2. Down’s syndrome – 44 autosomes + XO
3. Klinefelter’ssyndrome – 44 autosomes + XXY
4. Colour blindness – Y-linked
Filiform apparatus is characteristic feature of:
1. Nucellar embryo
2. Aleurone cell
3. Synergids
4. Generative cell
Identify the incorrectly matched pair:
Organism | Length of DNA | |
1. | Bacteriophage ϕ 174 | 5386 base pairs |
2. | Bacteriophage Lambda | 48502 base pairs |
3. | Escherichia coli | 4 X 106 base pairs |
4. | Human beings | 3.3 X 109 base pairs |
DNA is structurally and chemically more stable than RNA because of the following except:
1. | It has thymine instead of uracil |
2. | 2’ –OH is absent in DNA |
3. | It replicates itself based on complementary base pairing |
4. | It does not have any catalytic role |
Match biofortified crops in Column I with enriched nutrients in Column II and select the correct answer from the codes given:
|
Column I |
|
Column II |
A. |
Maize hybrids |
a. |
lysine and tryptophan |
B. |
Atlas 66 |
b. |
high protein content |
C. |
Golden rice |
c. |
Vitamin A |
Code
A | B | C | |
1. | a | b | c |
2. | a | c | b |
3. | b | a | c |
4. | c | a | b |
Match the items of Column - I with Column - II:
Column-I | Column-II | ||
(a) | XX-XO method of sex determination | (i) | Turner's syndrome |
(b) | XX-XY method of sex Determination | (ii) | Female heterogametic |
(c) | Karyotype-45 | (iii) | Grasshopper |
(d) | ZW-ZZ method of Sex Determination | (iv) | Female homogametic |
Select the correct option from the following:
1. (a) - (ii), (b)- (iv), (c)- (i), (d)-(iii)
2. (a) - (i), (b)- (iv), (c)- (ii), (d)-(iii)
3. (a) - (iii), (b)- (iv), (c)- (i), (d)-(ii)
4. (a) - (iv), (b)- (ii), (c)- (i), (d)-(iii)
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
Which one of the following statements regarding post-fertilization development in flowering plants is incorrect?
1. | Ovules develop into the embryo sac |
2. | Ovary develops into fruit |
3. | Zygote develops into an embryo |
4. | Central cell develops into endosperm |
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 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
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 deferens
3. Rete testis → Vas deferens → Efferent ductules → Epididymis
4. Efferent ductules →Rete testis → Vas deferens →Epididymis
Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.
1. Pleurisy | 2. Pneumonia |
3. Emphysema | 4. Asthma |
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
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
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
What is present between ectoderm and endoderm in diploblastic animals?
1. Mesenteron
2. Mesenchyme
3. Mesorchium
4. Mesoglea
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
1. | Acoelomate | 2. | Pseudocoelomate |
3. | Coelomate | 4. | Haemocoelomate |
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
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 |
Holocrine gland |
a |
Pancreas |
B |
Merocrine gland |
b |
Mammary gland |
C |
Apocrine gland |
c |
Sebaceous gland |
Codes
A | B | C | |
1. | a | b | c |
2. | c | b | a |
3. | c | a | b |
4. | a | c | b |
Cocaine acts through:
1. Interfering with the action of acetylcholine
2. Potentiating catecholamines
3. Interfering with the transport of dopamine
4. Releasing endorphins and enkephalins
How were nematode-specific genes introduced in tobacco plants?
1. | Using page DNA | 2. | Using a retrovirus |
3. | By gene gun | 4. | Using Agrobacterium tumefaciens |
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. |
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 especially trypsin and lipase, will not work efficiently.
A chemical signal that has both endocrine and neural roles is
1. | Melatonin | 2. | Calcitonin |
3. | Epinephrine | 4. | Cortisol |
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)
The structure that helps in cell wall formation, DNA replication and respiration in bacteria is :
1. Mesosome
2. Chromatophores
3. Pilus
4. Nucleoid
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.
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.
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
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
Carbohydrates in the chyme are hydrolysed into disaccharides by:
1. Salivary amylase
2. Pancreatic amylase
3. Gastric amylase
4. Intestinal amylase
Oogenesis is initiated:
1. | During the fetal life | 2. | Just before birth |
3. | Just after birth | 4. | At puberty |
Implantation in humans occurs at the stage of:
1. | Zygote | 2. | Morula |
3. | Blastocyst | 4. | Gastrula |
The 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. | he cervix mucus becomes hostile to sperms after parturition during intense lactation |
3. | Ovulation and menstrual flow does not occur postpartum during intense lactation |
4. | The endometrium is reabsorbed rather than sloughed off during intense lactation |
Olfactory epithelium extends directly into which of the following extensions of the brain’s limbic system?
1. Amygdala | 2. Olfactory lobe |
3. Septum | 4. Hippocampus |
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
To activate coagulation at the site of injury, certain factors 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
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 |
The location of kidneys in humans can be best described as:
1. between last thoracic and third lumbar vertebra close to dorsal inner wall of abdominal cavity
2. between last thoracic and third lumbar vertebra close to ventral inner wall of abdominal cavity
3. between 10th thoracic and third lumbar vertebra close to dorsal inner wall of abdominal cavity
4. between 10th thoracic and third lumbar vertebra close to ventral inner wall of abdominal cavity
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 superior and inferior radioulnar joints are examples of
1. | gliding joint | 2. | hinge joint |
3. | condyloid joint | 4. | pivot joint |
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 |
Drug called 'Heroin' is synthesized by:
1. nitration of morphine
2. methylation of morphine
3. acetylation of morphine
4. glycosylation of morphine
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
Which of the following is an accumulation and release centre of neurohormones?
1. Posterior pituitary lobe
2. Intermediate lobe of the pituitary
3. Hypothalamus
4. Anterior pituitary lobe
The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eyes is a derivative of
1. vitamin-C
2. vitamin-D
3. vitamin-A
4. vitamin-B
A change in the amount of yolk and its distribution in the egg will affect
1. formation of zygote
2. pattern of cleavage
3. number of blastomeres produced
4. fertilization
An allosteric inhibitor of an enzyme usually
1. binds to the active site.
2. participates in feedback regulation.
3. denatures the enzyme.
4. causes the enzyme to work faster.
Which of the following enzymes catalyze the removal of nucleotides from the ends of DNA?
1. | endonuclease | 2. | exonuclease |
3. | DNA ligase | 4. | Hind – II |
Which one of the following is a marine fish?
1. | Rohu | 2. | Hilsa |
3. | Catla | 4. | Common Carp |
Chill and high fever recurring in malaria coincide with:
1. Injection of sporozoites into the human blood
2. Multiplication of malarial parasite in the liver cells
3. Release of hemozoin by ruptured RBCs
4. Multiplication of malarial parasites in human RBCs
The differential success in the reproduction, of an organism, in a given environment, is :
1. | Adaptation | 2. | Natural Selection |
3. | Adaptive radiation | 4. | Saltatory 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 the 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. |
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
4. allopatry
Secretions from which one of the following are rich in fructose, calcium and some enzymes?
1. Liver
2. Pancreas
3. Salivary glands
4. Male accessory glands
Most cases of CAD result from:
1. | Angina pectoris | 2. | Myocardial infarction |
3. | Atherosclerosis | 4. | Heart failure |
The cartilage present in the pubic symphysis is:
1. Elastic | 2. Hyaline |
3. Fibrous | 4. Calcified |
Which of the following is incorrect regarding emphysema?
1. | Alveolar walls are damaged |
2. | There is an increase in the respiratory surface |
3. | Major cause is cigarette smoking |
4. | Can be caused by deficiency of Alpha-1-antitrypsin enzyme |
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
(4) Australopithecus