The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
1. lignified thick walls
2. cohesion and adhesion
3. weak gravitational pull
4. transpiration pull
The control points where a plant adjusts the quality and types of solutes that reach the xylem are:
1. Transport proteins of endodermal cells | 2. Root hair |
3. Parenchyma cells of the root cortex | 4. Casparian strips |
The first stable product of fixation of atmospheric nitrogen in leguminous plants is
1.
2. ammonia
3.
4. glutamate
The first acceptor of electrons from an excited chlorophyll molecule of photosystem II is :
1. | cytochrome | 2. | iron-sulphur protein |
3. | ferredoxin | 4. | quinone |
The stroma lamellae membranes:
1. have both PS II and NADP reductase enzyme
2. have PS II but not NADP reductase enzyme
3. lack PS II but have NADP reductase enzyme
4. lack both PS II and NADP reductase enzyme
The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called
1. glycolysis
2. fermentation
3. aerobic respiration
4. photorespiration
The maximum concentration of alcohol in beverages that are naturally fermented is about:
1. 5 – 8 % | 2. 13 – 15 % |
3. 33 – 34 % | 4. 47 – 49 % |
Coiling of garden pea tendrils around any support is an example of
1. thigmotaxis
2. thigmonasty
3. thigmotropism
4. thermotaxis
What percent of animals cannot maintain a constant internal environment?
1. 1 %
2. 25 %
3. 45 %
4. 99 %
Not all parasitism involves feeding on the body of the host. The exception is:
1. ectoparasitism
2. endoparasitism
3. parasitoids
4. brood parasitism
Which of the following continents has the highest biodiversity?
1. | South America | 2. | Africa |
3. | Europe | 4. | Asia |
Spindle fibres attach on to:
1. Kinetosome of the chromosome
2. Telomere of the chromosome
3. Kinetochore of the chromosome
4. Centromere of the chromosome
Which of the following is not a function of cytoskeleton in a cell?
1. Intercellular transport
2. Maintenance of cell shape and structure
3. Support of the organelle
4. Cell motility
Pick the wrong statement:
1. Protista have photosynthetic and heterotrophic modes of nutrition
2. Some fungi are edible
3. Nuclear membrane is present in Monera
4. Cell wall is absent in Animalia
A stage in cell division is shown in the figure. Select the answer which gives the correct identification of the stage with its characteristics.
Stages | Description | |
1. | Telophase | Nuclear envelop reforms, Golgi complex reforms |
2. | Late anaphase | Chromosomes move away from equatorial plate, Golgi complex not present |
3. | Cytokinesis | Cell plate formed, mitochondria distributed between two daughter cells |
4. | Telophase | Endoplasmic reticulum and nucleolus not reformed yet |
Usually the anther in an angiosperm has:
1. two lobes and each lobe has two pollen sacs
2. two lobes and each lobe has one pollen sac
3. four lobes and each lobe has one pollen sac
4. four lobes and each lobe has two pollen sacs
A bud is present in the axil of:
I. petiole in simple leaves
II. petiole in compound leaves
III. leaflets of the compound leaves
1. Only I and II | 2. Only I and III |
3. Only II and III | 4. I, II and III |
In a monocot stem:
1. Each vascular bundle is surrounded by a sclerenchymatous bundle sheath
2. Ground tissue is very poorly developed
3. Vascular bundles are conjoint and open with water containing cavities
4. Phloem parenchyma is present
Which of the following stages of Prophase I of meiosis I can last for many months or years in certain vertebrate oocytes?
1. | Zygotene | 2. | Pachytene |
3. | Diplotene | 4. | Diakinesis |
The saprophytic protists are:
1. Slime moulds | 2. Protozoans |
3. Desmids | 4. Dinoflagellates |
Vegetative reproduction in mosses is by:
1. Fragmentation and budding in secondary protonema
2. Only budding in secondary protonema
3. Adventitious roots and budding in secondary protonema
4. Fragmentation and budding in sporophyte
An unconscious patient cannot be aroused by stimuli to normal consciousness but the doctors hope that recovery is possible. This patient is said to be:
1. In deep sleep
2. Comatosed
3. Brain dead
4. Malingering
In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the megaspores develops into an embryo sac, its nuclei would be:
1. Haploid
2. Diploid
3. A few haploid and a few diploid
4. With varying ploidy
The movement of a gene from one linkage group to another is called :
1. Duplication
2.Translocation
3. Crossing over
4. Inversion
An example of a seed with endosperm, perisperm, and caruncle is:
1. | castor | 2. | cotton |
3. | coffee | 4. | lily |
In bacterial DNA replication, synthesis starting from the site of origin of replication
1. Involves RNA primers
2. Requires telomerase
3. Proceeds unidirectionally
4. Moves bidirectionally
Which of the following is not required for any of the techniques of DNA fingerprinting available at present?
1. | DNA -DNA hybridization | 2. | Polymerase chain reaction |
3. | Zinc finger analysis | 4. | Restriction enzymes |
What is the mode of inheritance of phenylketonuria?
1. | Autosomal recessive | 2. | Autosomal dominant |
3. | Sex linked recessive | 4. | Sex linked dominant |
The density gradient in Meselson and Stahl's experiment was of:
1. | NH4Cl | 2. | CsCl |
3. | KCl | 4. | BaCl2 |
In angiosperms, triple fusion results in the formation of:
1. | Zygote | 2. | Endosperm |
3. | Nucellus | 4. | PEC |
In case of incomplete dominance, the F1 progeny of a monohybrid cross resembles:
1. | Either of the parents | 2. | The male parent |
3. | Neither of the parents | 4. | Both parents |
Replication in prokaryotes differs from replication in eukaryotes for which of the following reasons?
1. | Prokaryotic chromosomes have histones, whereas eukaryotic chromosomes do not. |
2. | Prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have many. |
3. | The rate of elongation during DNA replication is slower in prokaryotes than in eukaryotes. |
4. | Prokaryotes produce Okazaki fragments during DNA replication, but eukaryotes do not. |
Biogas is a mixture of:
1. Methane, Carbon dioxide, and Hydrogen sulfide
2. Methane, Carbon dioxide, and Ammonia
3. Methane, Ammonia, and Hydrogen sulfide
4. Ammonia, Carbon dioxide, and Hydrogen sulfide
Consider the following statements:
I. G0 phase is viewed as either an extended G1 phase where the cell is neither dividing nor preparing to divide or as a distinct quiescent stage which occurs outside of the cell cycle.
II. In gamete production interphase is succeeded by meiosis.
III. In programmed cell death interphase is followed or preempted by apoptosis.
The correct statements include:
1. | II and III | 2. | I and III |
3. | I, II, and III | 4. | I only |
Select the correct group of biocontrol agents:
1. | Nostoc, Azospirillium, Nucleopolyhedrovirus |
2. | Bacillus thuringiensis. Tobacco mosaic virus, Aphids |
3. | Trichoderma, Baculovirus, Bacillus thuringiensis |
4. | Oscilatoria, Rhizobium, Trichoderma |
In which one of the following habitats does the diurnal temperature of soil surface vary most?
1. Forest
2. Desert
3. Grassland
4. Shrub land
Identify the incorrectly matched pair:
Ecosystem service |
Cost out of total [%] |
|
1. |
Soil formation |
50 |
2. |
Nutrient cycling |
10 |
3. |
Climate regulation |
6 |
4. |
Habitat for wildlife |
3 |
The material generally used for soundproofing rooms like a recording studio or an auditorium is:
1. | Cotton | 2. | Coir |
3. | Wood | 4. | Styrofoam |
Plasmodesmata are
1. Connections between adjacent plant cells
2. Lignified cemented layers between cells
3. Locomotory structures
4. Membranes connecting the nucleus with plasmalemma
Proteins are synthesized in preparation for mitosis during:
1. G1 phase | 2. S phase |
3. G2 phase | 4. M phase |
Recessive gene present on one X- chromosome of humans will be
1. Lethal
2. Sublethal
3. Expressed in males
4. Expressed in females.
Male gametophyte in angiosperms produces:
1. Single sperm and a vegetative cell
2. Single sperm and two vegetative cells
3. Three sperms
4. Two sperms and a vegetative cell
The distance between a base pair in the DNA double helix is approximately:
1. | 2.0 nm | 2. | 0.34 nm |
3. | 20 nm | 4. | 3.4 nm |
A molecule that can act as a genetic material must fulfil all the following criteria except:
1. | It should be able to generate its replica |
2. | It should chemically and structurally be stable |
3. | It should provide scope for rapid mutations |
4. | It should be able to express itself in the form of “Mendelian Characters” |
Classical plant breeding involves:
1. | Crossing or hybridization of pure lines and hardening |
2. | Crossing or hybridization of wild varieties and artificial selection |
3. | Crossing or hybridization of wild varieties and inbreeding |
4. | Crossing or hybridization of pure lines and artificial selection |
Select the correct sequence of events:
1. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell division (Cleavage) → Cell differentiation → Organogenesis |
2. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell division (Cleavage) → Organogenesis → Cell differentiation |
3. | Gametogenesis → Syngamy → Gamete transfer → Zygote → Cell division (Cleavage) → Cell differentiation → Organogenesis |
4. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell differentiation → Cell division (Cleavage) → Organogenesis |
What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile?
1. Down's syndrome
2. Turner's syndrome
3. Klinefelter's syndrome
4. Edward syndrome
According to Robert May, the global species diversity is about:
1. 20 Million
2. 50 Million
3. 7 Million
4. 1.5 Million
A species which was introduced for ornamentation but has become a troublesome weed in India :
(1) Parthenium hysterophorus
(2) Eichhornia crassipes
(3) Prosopis juliflora
(4) Trapa Spinosa
In some plants, the thalamus contributes to fruit formation. Such fruits are termed as
(1) False fruits
(2) Aggregate fruits
(3) True fruits
(4) Parthenocarpic fruit
Graves' disease is caused due to?
1. hyposecretion of thyroid gland
2. hypersecretion of thyroid gland
3. hyposecretion of adrenal gland
4. hypersecretion of adrenal gland
What is vital capacity of our lungs?
1. Inspiratory reserve volume plus tidal volume
2. Total lung capacity minus expiratory reserve volume
3. Inspiratory reserve volume plus expiratory reserve volume
4. Total lung capacity minus residual volume
Given below are four methods (A-D) and their modes of action (a-d) in achieving contraception. Select their correct matching from the four options that follow:
Method |
Mode of action |
||
A |
The pill |
a |
Prevents sperms from reaching the ovum |
B |
Condom |
b |
Prevents implantation |
C |
Vasectomy |
c |
Prevents ovulation |
D |
Copper - T |
d |
Semen contains no sperms |
Options: | (a) | (b) | (c) | (d) |
1. | c | a | d | b |
2. | d | a | b | c |
3. | c | d | a | b |
4. | b | c | a | d |
A typical fat molecule is made up of :
1. Three glycerol and three fatty acid molecules
2. Three glycerol molecules and one fatty acid molecule
3. One glycerol and three fatty acid molecules
4. One glycerol and one fatty acid molecule
Which of the following endoparasites of humans does show viviparity?
1. Enterobius vermicularis
2. Trichinella spiralis
3. Ascaris lumbricoides
4. Ancylostoma duodenale
Chordates are not characterized by:
1. | Ventral nerve cord | 2. | Post anal tail |
3. | Gill slits | 4. | A notochord |
Which one of the following statements is incorrect?
1. | In cockroaches and prawns, excretion of waste material occurs through malpighian tubules. |
2. | In ctenophores, locomotion is mediated by comb plates. |
3. | In Fasciola flame cells take part in excretion. |
4. | Earthworms are hermaphrodites and yet cross fertilization take place among them. |
The cells lining the blood vessels belong to the category of
1. Smooth muscle tissue
2. Squamous epithelium
3. Columnar epithelium
4. Connective tissue
The cell junctions in animal tissues that perform the function of cementing to keep neighbouring cells together are known as:
1. Tight junctions
2. Adhering junctions
3. Gap junctions
4. Desmosomes
Silencing of a gene could be achieved through the use of:
1. | RNAi only | 2. | antisense RNA only |
3. | both RNAi and antisense RNA | 4. | none of the above |
Small masses of lymphatic tissue found throughout the ileum region of the small intestine are called:
1. | Paneth cells | 2. | Meissener’s Plexus |
3. | Peyer’s patches | 4. | Entero-chromaffin cells |
In recombinant DNA experiments, a vector:
1. | carries DNA into a new cell |
2. | links together newly joined fragments of DN |
3. | makes millions of copies of a specific segment of DNA |
4. | separates fragments of DNA by their length and electrical charges |
The richest sources of vitamin B12 are
1. Chocolate and green gram.
2. Rice and hen’s egg
3. Carrot and chicken’s breast.
4. Goat’s liver and Spirulina
Select the correct matching of a hormone, its source and function.
Hormone |
Source |
Function |
|
1. |
Norepinephrine |
Adrenal medulla |
Increases heartbeat, rate of respiration and alertness |
2. |
Glucagon |
Beta-cells of islets of Langerhans |
Stimulates glycogenolysis |
3. |
Prolactin |
Posterior pituitary |
Regulates growth of mammary glands and milk formation in females |
4. |
Vasopressin |
Posterior pituitary |
Increases loss of water through urine |
In a standard ECG which one of the following alphabets is the correct representation of the respective activity of the human heart?
1. P-depolarization of ventricles
2. R-repolarization of ventricles
3. S-start of systole
4. T-end of diastole
An alpha helix is a:
1. primary structure of a protein
2. secondary structure of a protein
3. tertiary structure of a protein
4. quaternary structure of a protein
During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
1. First positive, then negative and again back to positive.
2. First negative, then positive and again back to negative.
3. First positive, then negative and continue to be negative.
4. First negative, then positive and continue to be positive.
Low Ca2+ in the body fluid may be the cause of
1. Angina pectoris
2. Gout
3. Tetany
4. Anemias
A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of
1. Fats | 2. Amino acids |
3. Ketones | 4. Glucose |
Match each item in Column I [zones of adrenal cortex] with one in Column II [hormone produced] and select your answer from the codes given:
Column I |
|
Column II |
|
A. |
Zona glomerulosa |
a. |
Aldosterone |
B. |
Zona fasciculata |
b. |
Cortisol |
C. |
Zona reticularis |
c. |
Adrenal androgens |
Codes
A | B | C | |
1. | a | b | c |
2. | a | c | b |
3. | b | a | c |
4. | b | c | a |
Hormonal control of the secretion of digestive juices is carried out by:
1. local hormones produced by the gastric and intestinal mucosa
2. hypothalamic hormones
3. hormones of the anterior pituitary gland
4. hormones of adrenal cortex
Which of the following will carry 46 chromosomes?
1. | Sperms | 2. | Spermatids |
3. | Secondary spermatocytes | 4. | Primary spermatocytes |
The menstrual cycle starts with the:
1. | Follicular phase | 2. | Menstrual phase |
3. | Ovulatory phase | 4. | Secretory phase |
Which of the following can be used by females as injectable or implant contraceptives?
I: | Progesterone alone |
II: | Estrogen alone |
III. | A combination of progesterone and estrogen |
1. | I and II only |
2. | I and III only |
3. | II and III only |
4. | I, II and III |
The major refractive surface in the human eye is the:
1. Anterior surface of cornea
2. Posterior surface of cornea
3. Anterior surface of lens
4. Posterior surface of lens
The brain stem includes all the following except:
1. Medulla oblongata | 2. Pons |
3. Mid brain | 4. Cerebellum |
Match the plasma proteins in Column I with their function in Column II and select the correct answer from the codes given:
Column I | Column II | ||
A. | Albumins | a. | Hemostasis |
B. | Globulins | b. | Transport carriers and immunity |
C. | Fibrinogen | c. | Colloid osmotic pressure |
Codes
A | B | C | |
1. | a | b | c |
2. | a | c | b |
3. | b | a | c |
4. | c | b | a |
The formation of oxy-hemoglobin at the alveoli is favored by all the following except:
1. High pO2 | 2. Low pCO2 |
3. Lower H+ ion concentration | 4. Higher temperature |
As the filtrate passes upward in the ascending limb of loop of Henle:
1. it gets diluted due to the reabsorption of water from medullary interstitium
2. it gets diluted due to the passage of electrolytes to medullary interstitium
3. it gets concentrated due to the reabsorption of electrolytes from medullary interstitium
4. it gets concentrated due to the passage of water to medullary interstitium
Where do you expect to find podocytes?
1. In the wall of afferent arteriole
2. In the wall of the DCT
3. In the lining of Bowman’s capsule
4. In the lining of Vasa recta
The correct location of the hypophysis in human body should be:
1. ethmoid sinuses
2. parietal bone
3. foramen magnum
4. sellaturcica
DNA precipitation out of a mixture of biomolecules can be achieved by treatment with:
1. | Chilled chloroform |
2. | isopropanal |
3. | Chilled ethanol |
4. | Methanol at room temperature |
Extrusion of the second polar body from egg nucleus occurs:
1. simultaneously with first cleavage
2. after entry of sperm but before fertilization
3. after fertilization
4. before entry of sperm into ovum
Match the following diseases with the causative organism and select the correct option.
Column -I | Column- II |
(a) Typhoid | (i) Wuchereria |
(b) Pneumonia | (ii) Plasmodium |
(c) Filariasis | (iii) Salmonella |
(d) Malaria | (iv) Haemophilus |
(a) | (b) | (c) | (d) | |
(1) | (iii) | (iv) | (i) | (ii) |
(2) | (ii) | (i) | (iii) | (iv) |
(3) | (iv) | (i) | (ii) | (iii) |
(4) | (i) | (iii) | (ii) | (iv) |
Bt cotton variety that was developed by the introduction of toxin gene of Bacillus thuringiensis (BT) is resistant to
1. Fungal diseases
2. Plant nematodes
3. Insect predators
4. Insect pests
A person is having problems with calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?
1. Parathyroid | 2. Parotid |
3. Pancreas | 4. Thyroid |
Injury localised to the hypothalamus would most likely disrupt
1. short term memory
2. coordination during locomotion
3. executive function, such as decision making
4. regulation of body temperature
The second maturation division of the mammalian ovum occurs:
1. | shortly after ovulation before the ovum makes an entry into the Fallopian tube |
2. | after the ovum has been penetrated by a sperm |
3. | until the nucleus of the sperm has fused with that of the ovum |
4. | in the Graafian follicle following the first maturation division |
Continued consumption of a diet rich in butter, red meat and eggs for a long period may lead to:
1. vitamin toxicity
2. kidney stones
3. hypercholesterolemia
4. urine laden with kidney stones
Taq polymerase is used in the polymerase chain reaction because:
1. | It replicates DNA faster than other enzymes |
2. | It is the only enzyme that can replicate DNA invitro |
3. | It does not require an RNA primer to function |
4. | It is thermostable |
At about \(0^\circ C\) , most enzymes are
1. inactive
2. active
3. destroyed
4. replicated
Which one of the following is a viral disease of poultry?
1. Pasteurellosis
2. Salmonellosis
3. Coryza
4. New castle disease
Presence of the gills in the tadpole of a frog indicates that:
1. fishes evolved from frog-like ancestors
2. frogs will have gills in future
3. frogs evolved from gilled ancestors
4. fishes were amphibious in the past
Identify the correct statement regarding typhoid fever in human beings:
1. | It is caused by a pathogenic protozoan Salmonella typhi |
2. | The pathogen remains confined to the small intestine |
3. | Widal test can confirm the infection very early in the disease |
4. | Intestinal perforation and death may occur in severe cases |
In allopatric speciation, reproductive isolation is initially caused by:
1. | behavioral barriers | 2. | postzygotic barriers |
3. | geographic barriers | 4. | ecological barriers |
Which of the following will not counter natural selection?
1. genetic drift
2. gene flow
3. mutation
4. Unlimited resources
The best evidence for tracing phylogeny amongst a group of organisms will be similarities in their:
1. | anatomy | 2. | DNA and Proteins |
3. | development | 4. | courtship behavior |
Which of the following hormones is not a secretion product of human placenta?
1. Prolactin
2. Oestrogen
3. Progesterone
4. Human chorionic gonadotropin
The period of systole is represented on surface ECG as between:
1. Beginning of P wave and beginning of Q wave
2. End of S wave and beginning of T wave
3. Shortly after Q wave and end of the T wave
4. Two successive R waves
Skeletal muscles are:
1. Striated, Multinucleate and Voluntary
2. Non-Striated, Multinucleate and Voluntary
3. Striated, Multinucleate and Involuntary
4. Non-Striated, Uni-nucleate and Voluntary