In plants, water moves from
1. less negative to more negative potential
2. more negative to less negative potential
3. a point to another point with the same potential
4. none of the above
During mass flow in phloem, active transport is required:
1. For uploading sap
2. For unloading sap
3. Both for uploading and unloading the sap
4. Active transport is not required
Which one of the following is not a micronutrient?
1. Molybdenum
2. Magnesium
3. Zinc
4. Boron
As compared to a plant, how many additional molecules of ATP are needed for net production of one molecule of hexose sugar by plants ?
1. | Zero | 2. | Six |
3. | Two | 4. | Twelve |
How many ATP and NADPH are respectively required to make one molecule of glucose through the Calvin pathway?
1. 3 and 2 | 2. 6 and 6 |
3. 9 and 6 | 4. 18 and 12 |
The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:
1. ATP in small stepwise units
2. ATP in one large oxidation reaction
3. Sugars
4. Nucleic acids
The electron transport system in mitochondria is located in the:
1. Inner mitochondrial membrane
2. Outer mitochondrial membrane
3. Inter membrane space
4. Matrix
Which PGR stimulates the closure of stomata in the epidermis and increases the tolerance of plants to various kinds of stress?
1. Cytokinin | 2. Giberrellin |
3. ABA | 4. Ethylene |
Any attribute of the organism that enables the organism to survive and reproduce in its habitat is called as:
1. Adaptation
2. Phenotypic plasticity
3. Acclimatization
4. Norm of the reaction
Match the animals given in column I with their location in column II:
Column I |
Column II |
A. Dodo |
i. Africa |
B. Quagga |
ii. Russia |
C. Thylacine |
iii. Mauritius |
D. Stellar’s sea cow |
iv. Australia |
Choose the correct match from the following:
1. | A-i | B-iii | C-ii | D-iv |
2. | A-iv | B-iii | C-i | D-ii |
3. | A-iii | B-i | C-ii | D-iv |
4. | A-iii | B-i | C-iv | D-ii |
According to Allen’s Rule, mammals from colder climates have:
1. Shorter ears and longer limbs
2. Longer ears and shorter limbs
3. Longer ears and longer limbs
4. Shorter ears and shorter limbs
Which of the following is not a feature of the plasmids?
1. | Single – stranded | 2. | Independent replication |
3. | Circular structure | 4. | Transferable |
A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has
1. Twice the number of chromosomes and twice the amount of DNA
2. Same number of chromosomes but twice the amount of DNA
3. Twice the number of chromosomes and four times the amount of DNA
4. Four times the number of chromosomes and twice the amount of DNA
Variation in the length of filaments within a flower is seen in:
1. | Pea | 2. | Citrus |
3. | Salvia | 4. | Brinjal |
The floral formula shown below belongs to the family:
1. Liliaceae
2. Fabaceae
3. Solanaceae
4. Brassicaceae
Meiosis results in the formation of:
1. Two genetically identical diploid cells
2. Two genetically non identical diploid cells
3. Four genetically identical haploid cells
4. Four genetically non identical haploid cells
Match the following and choose the correct option from below:
A. Meristem |
i. Photosynthesis, storage |
B. Parenchyma |
ii. Mechanical support |
C. Collenchyma |
iii. Actively dividing cells |
D. Sclerenchyma |
iv. Stomata |
E. Epidermal tissue |
v. Sclereids |
Options:
A | B | C | D | E | |
1. |
i |
iii |
v |
ii |
iv |
2. |
iii |
i |
ii |
v |
iv |
3. |
ii |
iv |
v |
i |
iii |
4. |
v |
iv |
iii |
ii |
i |
Who, amongst the following, was the earliest to attempt a more scientific basis of classification?
1. | Aristotle | 2. | John Ray |
3. | Tournefort | 4. | Linnaeus |
Prothallus is a:
1. | Multicellular, free-living, mostly photosynthetic thalloid gametophyte in pteridophytes |
2. | Multicellular, free-living, mostly photosynthetic thalloid sporophyte in pteridophytes |
3. | Multicellular, free-living, non photosynthetic thalloid gametophyte in pteridophytes |
4. | Multicellular, free-living, mostly photosynthetic well differentiated sporophyte in pteridophytes |
Humans belong to the Order:
1. | Hominidae | 2. | Primata |
3. | Mammalia | 4. | Vertebrata |
An abnormal human baby with 'XXX' sex chromosomes was born due to :
1. formation of abnormal ova in the mother
2. fusion of two ova and one sperm
3. fusion of two sperms and one ovum
4. formation of abnormal sperms in the father
Nucellar polyembryony is reported in which of the following species?
1. Citrus
2. Gossypium
3. Triticum
4. Brassica
During transcription, holoenzyme RNA polymerase binds to DNA sequence and DNA assumes a saddle like
structure at that point. The sequence is called
1. AAAT box
2. TATA box
3. GGTT box
4. CAAT box.
DNA fragments are:
1. Positively charged
2. Negatively charged
3. Neutral
4. Either positively or negatively charged depending on their size
The number of autosomes in a human egg would be:
1. | 22 | 2. | 23 |
3. | 1 | 4. | 2 |
Prior to the work of Avery, Macleod, and McCarty, the genetic material was thought to be:
1. | DNA | 2. | RNA |
3. | Protein | 4. | Nucleotide |
Consider the following two statements regarding the integuments of an ovule:
I: | Angiosperms are generally bitegmic and gymnosperms unitegmic |
II: | The integuments develop into the seed coat when the ovule matures after fertilization. |
Of the two statements:
1. Both I and II are true
2. Both I and II are false
3. Only I is true
4. Only II is true
In angiosperms:
1. Pollen grains are motile but the egg cell is non-motile.
2. Pollen grains are non-motile but the egg cell is motile.
3. Both pollen grain and egg cell are non-motile.
4. Both pollen grain and egg cell are motile.
A man of which of the following blood groups could not be the father of a group O child?
1. A
2. B
3. O
4. AB
On examining a sample of human DNA, it was found that it contains approximately 24 % thymine. Which of the following would be true based on this finding?
1. The amount of adenine in a similar sample of DNA from any human being will be approximately 24 %.
2. The amount of adenine in a similar sample of DNA from any living being will be approximately 24 %.
3. The amount of adenine in a similar sample of DNA from any eukaryotic cell will be approximately 24 %.
4. The amount of adenine in a similar sample of DNA from any mammal will be approximately 24 %.
Which of the following human diseases cannot be treated by antibiotics?
1. | Plague | 2. | Diphtheria |
3. | Leprosy | 4. | Mumps |
The point of contact between paired chromatids during meiosis, resulting in a cross-shaped configuration and representing the cytological manifestation of crossing over is called:
1. | Centromere | 2. | Centrosome |
3. | Chiasmata | 4. | Tetrad |
A non-membrane bound organelle found in all cells is:
1. | Centriole | 2. | Lysosome |
3. | Vacuole | 4. | Ribosome |
A biocontrol agent to be a part of an integrated pest management should be
1. species-specific and symbiotic
2. free living and broad spectrum
3. narrow spectrum and symbiotic
4. species-specific and inactive on non-target organisms
The size of Pleuropneumonia - like Organism (PPLO) is :
1. 0.02 m
2. 1-2 m
3. 10-20 m
4. 0.1 m
Exponential population growth is represented by
1. dt/dn=rN
2. dN/rN= dt
3. rN/dN= dt
4. dN/dt = rN
Which of the following is not a producer?
1. | Spirogyra | 2. | Agaricus |
3. | Volvox | 4. | Nostoc |
Which of the following material takes the longest time for biodegradation?
1. | Cotton | 2. | Paper |
3. | Bone | 4. | Jute |
Important site for formation of glycoproteins and glycolipids is
1. Vacuole
2. Golgi apparatus
3. Plastid
4. Lysosome
The centrosome duplicates during:
1. Early Prophase | 2. Late Prophase |
3. S phase | 4. G2 phase |
In which one pair from the pairs given below, both the plants can be vegetatively propagated by leaf segments?
1. Agave and Kalanchoe
2. Bryophyllum and Kalanchoe
3. Asparagus and Bryophyllum
4.Chrysanthemum and Agave
Most favourite and ideal material for researches in genetics is
1. Housefly
2. Mosquito
3. Frog
4. Fruitfly.
Point mutation involves
1. Deletion
2. Insertion
3. Change in single base pair
4. Duplication
The wheat grain has an embryo with one large, shield-shaped cotyledon known as:
1. | Coleorrhiza | 2. | Scutellum |
3. | Coleoptile | 4. | Epiblast |
The process of RNA splicing shows the dominance of:
1. | DNA world | 2. | RNA world |
3. | Protein world | 4. | Microbial world |
Who proposed a semi-conservative mode of replication for DNA?
1. | Watson and Crick | 2. | Meselson and Stahl |
3. | Hershey and Chase | 4. | Beadle and Tatum |
The method of producing thousands of plants through tissue culture is called:
1. Somatic hybridization
2. Micropropagation
3. Somatic embryogenesis
4. Pure line production
Exploration of molecular, genetic, and species level diversity for novel products of economic importance is known as:
1. Biopiracy
2. Bioenergetics
3. Bioremediation
4. Bioprospecting
Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:
1. making tubes and pipes
2. making plastic sacks
3. use as a fertilizer
4. construction of roads
Persistent nucellus in the seed is known as:
1. Tegmen
2. Chalaza
3. Perisperm
4. Hilum
Which one of the following hormones is not involved in sugar metabolism?
1. Cortisone
2. Aldosterone
3. Insulin
4. Glucagon
Match column I with column II and select the correct option using the codes given below
Column 1 | Column II |
1. Mons pubis | a. Embryo formation |
2. Antrum | b. Sperm |
3. Trophoectoderm | c. Female external genitalia |
4. Nebenkern | d. Graafian follicle |
Codes:
A B C D
1. c d b a
2. c d a b
3. c a d b
4. a d c b
The figure shows a diagrammatic view of human respiratory system with labels A, B, C and D. Select the option, which gives correct identification and main function and/or characteristic.
1. A-trachea-long tube supported by complete cartilaginous rings for conducting inspired air
2. B-pleural membrane-surrounds ribs on both sides to provide cushion against rubbing
3. C-alveoli-thin walled vascular bag-like structures for exchange of gases
4. D-lower end of lungs-diaphragm pulls it down during inspiration
Which of the following are not polymeric?
1. | nucleic acids | 2. | proteins |
3. | polysaccharides | 4. | Lipids |
Which of the following diseases is caused by a protozoan?
1. Influenza
2. Babesiosis
3. Blastomycosis
4. Syphilis
Mammals are not characterized by:
1. | Presence of hair | 2. | Presence of mammary glands |
3. | Homodont dentition | 4. | Endothermy |
The terga, sterna and pleura of cockroach body are joined by :
1. Muscular tissue
2. Arthrodial membrane
3. Cartilage
4. Cementing glue
‘Cephalization’ in animals was facilitated by evolution of:
1. Radial symmetry
2. Tissue grade organization
3. Bilateral symmetry
4. True coelom
What are the structures labelled A, B, C and D respectively, in the given diagram?
1. | Mast cell, Fibroblast, Collagen, Macrophage |
2. | Mast cell, Dendritic cell, Collagen, Macrophage |
3. | Macrophage, Fibroblast, Elastin, Mast cell |
4. | Macrophage, Fibroblast, Collagen, Mast cell |
Steroid abuse in males does not cause:
1. Decrease in size of the prostate
2. Acne
3. Breast enlargement
4. Reduction of testicle size
The first recombinant therapeutic product approved for human use was:
1. | Humulin | 2. | hGH |
3. | Factor VIII clotting factor | 4. | Erythropoietin |
Identify (a) and (b) bioreactors respectively in the given diagram:
1. Simple stirred-tank and sparged stirred – tank
2. Sparged stirred - tank and simple stirred-tank
3. Airlift and tower
4. Tower and airlift
Which one of the following correctly represents the normal adult human dental formula?
1.
2.
3.
4.
Test tube baby means a baby born when:
1. | it is developed in a test tube. |
2. | it is developed through the tissue culture method. |
3. | the ovum is fertilized externally and thereafter implanted in the uterus. |
4. | it develops from a non-fertilized egg. |
Which one of the following hormones though synthesized elsewhere, is stored and released by the master gland?
1. Melanocyte stimulating hormone
2. Antidiuretic hormone
3. Luteinizing hormone
4. Prolactin
If due to some injury, the chordae tendineae of the tricuspid valve of the human heart are partially non-functional, what will be the immediate effect?
1. The blood will tend to flow back into the left atrium
2. The flow of blood into the pulmonary artery will be reduced
3. The flow of blood into aorta will be slowed down
4. The pacemaker will stop working
Cell membrane carbohydrates participate in
1. transporting substances between two protein layers
2. cell-to-cell recognition
3. attaching the membrane to cytoskeleton
4. cell adhesions
Which part of human brain is concerned with the regulation of body temperature?
1. Cerebellum
2. Cerebrum
3. Hypothalamus
4. Medulla oblongata
Which one of the following pairs of chemical substances are correctly categorized?
Enzymes |
Characteristics |
|
1 |
Troponin and myosin |
Complex protein in striated muscles |
2 |
Secretin and rhodopsin |
Polypeptide hormones |
3 |
Calcitonin and thymosin |
Thyroid hormones |
4 |
Pepsin and prolactin |
Two digestive enzymes secreted in stomach |
Which of the following causes an increase in sodium reabsorption in distal convoluted tubule?
1. Increase in aldosterone levels.
2. Decrease in antidiuretic hormone levels.
3. Decrease in aldosterone levels.
4. Decrease in antidiuretic hormone levels.
Identify the correct statements from the following:
I: | ANF is secreted by the right atrium of heart and causes vasodilation |
II: | Erythropoietin is secreted by kidney and stimulates bone marrow to produce RBC |
III: | Insulin-like growth factors are secreted by liver and play an important role in childhood growth, and has anabolic effects in adults |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
Which of the following worm infection is unlikely to result in the inflammation of the intestinal tract?
1. tapeworm
2. threadworm
3. pin worm
4. filarial worm
Corpus luteum is essential for:
1. Release of ovum
2. Development of follicles
3. Maintenance of endometrium
4. Contraction of the myometrium
During pregnancy the levels of thyroxin:
1. Increase several folds in maternal blood
2. Increases several folds in fetal blood
3. Decreases several folds in maternal blood
4. Decreases several folds in fetal blood
Which of the following is not useful in the prevention of the spread of STDs?
1. | Avoid sex with unknown partners/ multiple partners |
2. | Use of condoms during coitus |
3. | Early diagnosis and treatment |
4. | Use of IUDs |
Membranous labyrinth of the inner ear is surrounded by:
1. Perilymph | 2. Endolymph |
3. Hemolymph | 4. Air |
The amount of light entering the human eye is regulated by:
1. Pupil | 2. Iris |
3. Cornea | 4. Ciliary body |
The normal hematocrit value of human blood is:
1. 45
2. 50
3. 55
4. 60
Which of the following is higher in value?
1. Amount of carbon dioxide delivered by 100 ml of blood at lungs than amount of oxygen delivered by 100 ml of blood at tissues
2. Amount of carbon dioxide transported by hemoglobin than amount of oxygen transported by hemoglobin
3. The diffusing capacity of carbon dioxide across the respiratory membrane than the diffusing capacity of oxygen across the respiratory membrane
4. Alveolar ventilation than the minute ventilation
Urination will be caused by simultaneous:
1. contraction of smooth muscle of bladder and relaxation of urethral sphincter
2. relaxation of smooth muscle of bladder and contraction of urethral sphincter
3. contraction of smooth muscle of bladder and urethral sphincter
4. relaxation of smooth muscle of bladder and urethral sphincter
Which of these has the highest concentration in the urine?
1. | glucose | 2. | sodium |
3. | uric acid | 4. | phosphate |
What type of muscles do you expect to find in the inner walls of hollow visceral organs?
1. | Involuntary, nonstriated | 2. | Voluntary, nonstriated |
3. | Involuntary, striated | 4. | Voluntary, striated |
Match the following enzymes with their functions:
Column-I |
Column-II |
||
(a) |
Restriction endonuclease |
(i) |
joins the DNA fragments |
(b) |
Exonuclease |
(ii) |
extends primers on genomic DNA template |
(c) |
DNA ligase |
(iii) |
cuts DNA at specific position |
(d) |
Tag polymerase |
(iv) |
removes nucleotides from the ends of DNA |
Select the correct option from the following:
1. (a) - (iii), (b)- (i), (c)- (iv), (d)-(ii)
2. (a) - (iii), (b)- (iv), (c)- (i), (d)-(ii)
3. (a) - (iv), (b)- (iii), (c)- (i), (d)-(ii)
4. (a) - (ii), (b)- (iv), (c)- (i), (d)-(iii)
Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.
1. Salmonella typhi/Widal test
2. Plasmodium vivax/UTI test
3. Streptococcus pneumoniae/Widal test
4. Salmonella typhi/Anthrone test
What triggers activation of protoxin to active Bt toxin of Bacillus thuringeinsis in boll worm?
1. Acidic pH of stomach
2. Body temperature
3. Moist surface of midgut
4. Alkaline pH of gut
Which hormone causes dilation of blood vessels, increased oxygen consumption and gluconeogenesis ?
1. ACTH
2. Insulin
3. Adrenalin
4. Glucagon
When a neuron is at resting state, i.e., not conducting any impulse, the axonal membrane is
1. equally permeable to both and ions
2. impermeable to both and ions
3. comparatively more permeable to ions and nearly impermeable to ions
4. comparatively more permeable to ions and nearly impermeable to ions
Foetal ejection reflex in human female is induced by
1. pressure exerted by amniotic fluid
2. release of oxytocin from pituitary
3. fully developed foetus and placenta
4. differentiation of mammary glands
A change in an amino acid located distantly from the active site of an enzyme can affect the specificity of the enzyme towards its substrate by:
1. making the enzyme unstable
2. cause a relocation of the enzyme within a cell
3. changing the shape of the protein
4. changing the optimum pH and temperature values for the enzyme
The transfer of genetic material from one bacterium to another through the mediation of a viral vector is termed as:
1. | Transduction | 2. | Conjugation |
3. | Transformation | 4. | Translation |
Which one of the following products of apiculture is used in cosmetics and polishes?
1. | honey | 2. | propolis |
3. | wax | 4. | Royal jelly |
The mechanical carrier of the causative agent of amoebic dysentery is:
1. | A protozoan | 2. | House fly |
3. | Mosquito | 4. | Rodent |
A small population experiences a sudden crash in size due to a natural calamity. The biggest threat to the population is:
1. loss of genetic variability
2. tendency towards assortative mating
3. reduced gene flow
4. Hardy - Weinberg disequilibrium
Which of the following is not a major evolutionary trend seen in the evolution of horses?
1. | Progressive increase in the number of toes |
2. | Increase in the complexity of the molar teeth |
3. | Lengthening of the limbs in general |
4. | Enlargement of the brain |
In which of the following groups of organisms is the sympatric speciation most likely to occur?
1. amphibians
2. arthropods
3. plants
4. birds
In human female, the blastocyst
1. Gets implanted into the uterus 3 days after ovulation.
2. Gets nutrition from uterine endometrial secretion only after implantation.
3. Gets implanted in endometrium by the trophoblast cells.
4. Forms placenta even before implantation.
Which among the following is correct during each cardiac cycle?
1. The volume of blood pumped by right and left ventricles is same
2. The volume of blood pumped by right and left ventricles is different
3. The volume of blood received by right and left atria is different
4. The volume of blood received by pulmonary arteries and aorta is different
Hypocalcaemia can lead to:
1. | Duchenne Muscular Dystrophy | 2. | Tetany |
3. | Renal calculi | 4. | Myasthenia gravis |
The enzyme carbonic anhydrase is present:
1. in RBCs but not in plasma
2. in high concentration in RBCs and in minute quantity in plasma
3. in minute quantities, both in RBCs and in plasma
4. in high concentration, both in RBCs and in plasma
Embryological support for evolution was proposed by
(1) Ernst Heckel
(2) Karl Ernst von Baer
(3) Charles Darwin
(4) Alfred Wallace