Unlike a symporter and an antiporter, a uniporter:
1. is not an integral membrane protein
2. is a cell surface carbohydrate
3. is not a co-transporter
4. cannot be used for active transport
The movement of water through the root layers is ultimately:
1. apoplastic along the walls | 2. active transport by porins |
3. symplastic in the endodermis | 4. symplastic in the xylem |
If you have carefully read the role of macronutrients in your NCERT, you should be able to tell the name of the mineral that plays an important role in several carbon dioxide transfers catalyzed by carboxylase enzymes. The mineral is:
1. Magnesium
2. Sulfur
3. Iron
4. Calcium
Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following options.
1. Both process can happen together because the diffusion coefficients of water and CO2 are different.
2. The above processes happen only during night time
3. One process occurs during the day time and the other occurs at night
4. Both processes cannot happen simultaneously
A plant in your garden avoids photorespiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?
1. | C4 | 2. | CAM |
3. | Nitrogen-fixer | 4. | C3 |
Oxidative phosphorylation is
1. formation of ATP by transfer of phosphate group from a substrate to ADP
2. oxidation of phosphate group in ATP
3. addition of phosphate group to ATP
4. formation of ATP by energy release from electrons removed during substrate oxidation
Development is a term that includes all changes that a plant goes through during its life cycle:
1. till germination of the seed
2. during its vegetative growth
3. from germination till flowering
4. from germination to senescence
The most ecologically relevant environmental factor is:
1. | Temperature | 2. | Water |
3. | Light | 4. | Soil |
“Competitive Exclusion Principle” may be true if:
1. The competing species are equally capable
2. Resource partitioning occurs
3. There is only intraspecific competition
4. Resources are limiting
Identify the “vulnerable species in India”:
1. Berberis nilghiriensis and Sus salvanius
2. Bentickia nicobarica and Ailurus fulgens
3. Cupressus cashmeriana and Antilope cervicapra
4. Bentickia nicobarica and Antilope cervicapra
Match the following and select the correct answer :
(a) | Centriole | (i) | Infoldings in mitochondria |
(b) | Chlorophyll | (ii) | Thylakoids |
(c) | Cristae | (iii) | Nucleic acids |
(d) | Ribozymes | (iv) | Basal body cilia or flagella |
A | B | C | D | |
1. | (iv) | (ii) | (i) | (iii) |
2. | (i) | (ii) | (iv) | (iii) |
3. | (i) | (iii) | (ii) | (iv) |
4. | (iv) | (iii) | (i) | (ii) |
Select one which is not true for ribosome
1. Made of two sub units
2. Form poly some
3. May attach to m RNA
4. Have no role in protein synthesis
Pigment-containing membranous extensions in some cyanobacteria are :
1. Basal bodies
2. Pneumatophores
3. Chromatophores
4. Heterocysts
In the somatic cell cycle,
1. DNA replication takes place in S-phase
2. A short interphase is followed by a long mitotic phase
3. G2 phase follows mitotic phase
4. In G1 phase, DNA content is double the amount of DNA present in the original cell
What is not true for a stem in a flowering plant in general?
1. Negatively geotropic
2. Develops from plumule of the germinating embryo
3. Absence of terminal and axillary buds
4. Spreads out branches bearing leaves, flowers and fruits
Seed coat is membranous and generally fused with the fruit wall in:
1. | Apple | 2. | Maize |
3. | Coconut | 4. | Castor |
During the formation of leaves and the elongation of stem, some cells are left behind from the shoot apical meristem and constitute the:
1. Leaf primordium
2. Shoot apical meristematic zone
3. Differentiating vascular tissue
4. Axillary bud
Which of the following is not a continuous process during cell cycle?
1. Synthesis of DNA
2. Cell growth
3. Metabolism
4. Both cell growth and metabolism
Telomerase is an enzyme which is a:
1. Ribonucleoprotein
2. Simple protein
3. RNA
4. Repetitive DNA
In general, the viruses that infect plants have:
1. | Single stranded RNA | 2. | Single stranded DNA |
3. | Double stranded RNA | 4. | Double stranded DNA |
A difference between a gymnosperm and an angiosperm would be:
1. Lack of a flower
2. Undeveloped vascular tissue
3. Xylem is mainly composed of vessels and phloem contains companion cell in angiosperms
4. Microspore grows into a pollen tube
Which of the following are the defining properties of life?
1. Growth and Reproduction
2. Cellular organization and Consciousness
3. Growth and Consciousnes
4. Cellular organization and Reproduction
From the statements given below, choose the option that is true for a typical female gametophyte of a flowering plant:
i. | It is 8-nucleate and 7-celled at maturity |
ii. | It is free-nuclear during the development |
iii. | It is situated inside the integument but outside the nucellus |
iv. | It has an egg apparatus situated at the chalazal end |
1. | i and iv | 2. | ii and iii |
3. | i and ii | 4. | ii and iv |
Match the following list of microbes and their importance.
(a) |
Saccharomyces cerevisiae |
(i) |
Production of immunosuppressive drug |
(b) |
Moancus purpureus |
(ii) |
Ripening of Swiss cheese |
(c) |
Trichoderma polysporum |
(iii) |
Commercial production of ethanol |
(d) |
Propionibacterium shermanii |
(iv) |
Production of blood cholesterol lowering agents |
(a) (b) (c) (d)
1. (iii) (i) (iv) (ii)
2. (iii) (iv) (i) (ii)
3. (iv) (iii) (ii) (i)
4. (iv) (ii) (i) (iii)
If two persons with 'AB' blood group marry and have a sufficiently large number of children, these children could be classified as 'A' blood group: 'AB' blood group: 'B'blood group in a 1:2:1 ratio. The modern technique of protein electrophoresis reveals the presence of both' A' and 'B' type proteins in 'AB' blood group individuals. This is an example of:
1. | Incomplete dominance | 2. | Partial dominance |
3. | Complete dominance | 4. | Codominance |
Geitonogamy involves
1. Fertilization of a flower by the pollen from another flower of the same plant
2. Fertilization of a flower by the pollen from same flower
3. Fertilization of a flower by the pollen from a flower of another plant in the same population
4. Fertilization of a flower by the pollen from a flower of another plant belonging to a distant population
What is it that forms the basis of DNA Fingerprinting?
1. | The relative proportions of purines and pyrimidines in DNA. |
2. | The relative difference in the DNA occurrence in blood, skin, and saliva. |
3. | The relative amount of DNA in the ridges and grooves of the fingerprints. |
4. | Satellite DNA occurring as highly repeated short DNA segments |
Which of the following amino acid substitution in the beta chain of the haemoglobin molecule leads to the development of sickle cell anaemia?
1. Arginine by tyrosine
2. Tyrosine by phenylalanine
3. Valine by Glutamic acid
4. Glutamic acid by Valine
An individual affected by Klinefelter’s syndrome:
1. | Has 47 autosomes. |
2. | Has overall feminine development. |
3. | Has gynecomastia. |
4. | Has an additional copy of the Y chromosome. |
In a dissimilar situation, the unit factor that expresses itself is called as:
1. | Dominant | 2. | Recessive |
3. | Epistatic | 4. | Hypostatic |
The unequivocal proof that DNA is the genetic material was provided by:
1. | Avery, Macleod, and McCarty |
2. | Hershey and Chase |
3. | Meselson and Stahl |
4. | Watson and Crick |
The pollen tube releases the two male gametes first into:
1. The vicinity of the egg cell.
2. The vicinity of polar nuclei.
3. In the cytoplasm of synergids.
4. In the cytoplasm of antipodals.
Griffith co-injected the heat-killed S and live R strains of Pneumococcus bacterium into the mice and much to his surprise the mice developed pneumonia and died. He concluded that:
I: | Live R was transformed into Live S strain as he was able to isolate Live S strain from the blood of the infected mice. |
II: | Bacterial transformation is a stable and heritable change as the culture of bacteria isolated from dead mice was unable to infect other mice. |
1. | Both I and II are correct |
2. | Only I is correct |
3. | Only II is correct |
4. | Both I and II are incorrect |
BOD of waste water is estimated by measuring the amount of:
1. total organic matter
2. biodegradable organic matter
3. oxygen evolution
4. oxygen consumption.
Which scientist experimentally proved that DNA is the sole genetic material in bacteriophage ?
1. Beadle and Tatum
2. Messelson and Stahl
3. Hershey and Chase
4. Jacob and Monod
The reservoir is located in the Earth’s crust for:
I. Gaseous type of nutrient cycle
II. Sedimentary nutrient cycle
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
An example of ex situ conservation is :
1. National Park
2. Seed Bank
3. Wildlife santuary
4. Sacred Grove
Which one of the following is correct percentage of the two (out of the total of 4) green house gases tocontribute to the total global warming.
1. 6%, 86 %
2. Methane 20% , 18%
3. 40%, CFC 30%
4. CFCs 14%, methane 20%
A painful bone condition is produced when the drinking water is contaminated with:
1. Lead
2. Mercury
3. Cadmium
4. Arsenic
Which of the following statement about cilia is not correct?
1. Organised beating of cilia is controlled by fluxes of Ca2+ across the membrane.
2. Cilia are hair like cellular appendages.
3. Cilia contain an outer ring of nine doublet microtubules surrounding two singlet microtubules.
4. Microtubules of cilia are composed of tubulin.
Nucleoprotein fibers in the interphase nucleus called chromatin contain all the following except:
1. | DNA | 2. | Basic histones |
3. | RNA | 4. | Acidic histones |
Which one is not a hereditary disease
1. Cystic fibrosis
2. Cretinism
3. Thalassaemia
4. Haemophilia
A woman with normal vision but with colorblind father marries a colorblind man. The fourth child of the couple is a boy. This boy
1. May or may not be colorblind
2. Must be colorblind
3. Must have normal vision
4. Will be partially colorblind due to being heterozygous
In oogamy, fertilization occurs between
1. Small non-motile female gamete and large motile male gamete
2. Large non-motile female gamete and small motile male gamete
3. A large non-motile female gamete and a small non-motile male gamete
4. A large motile female gamete and a small non-motile male gamete
In a strand of nucleic acid, two nucleotides are linked together by:
1. 3’ – 5’ phosphodiester bond
2. 5’ – 3’ phosphodiester bond
3. 2’ – 5’ phosphodiester bond
4. 3’ – 1’ phosphodiester bond
The lac Y gene codes for permease, which increases the permeability of the cell to:
1. | Glucose | 2. | Galactose |
3. | cAMP | 4. | β-galactosides |
In mung bean, resistance to yellow mosaic virus and powdery mildew were induced by:
1. Conventional hybridization
2. Mutations
3. Genetic engineering
4. Tissue culture
Identify the incorrectly matched pair:
1. Cockroach - Unisexual animal
2. Chara - Monoecious plant
3. Marchantia - Dioecious plant
4. Sweet potato - Unisexual flower
Which of the following is not an attribute of a population?
1. Natality
2. Mortality
3. Species interaction
4. Sex ratio
The best example for pleiotropy is:-
(1) Skin color
(2) Phenylketonuria
(3) Colour Blindness
(4) ABO Blood group
Perhaps the biggest reason for the enormous success of Arthropods is?
1. Chitinous exoskeleton
2. Diverse appendages
3. Respiration by tracheoles
4. Internal fertilization
The source of somatostatin is same as that of
1. thyroxine and calcitonin
2. insulin and glucagon
3. somatotropin and prolactin
4. vasopresin and oxytocin
The partial pressure of oxygen in the alveoli of the lungs is
1. equal to that in the blood
2. more than that in the blood
3. less than that in the blood
4. less than that of carbon dioxide
The part of nephron involved in active reabsorption of sodium is
1. distal convoluted tubule
2. proximal convoluted tubule
3. Bowman's capsule
4. descending limb of Henle's loop
Which of the following is true for excretion in humans?
1. Glucose and amino acids are reabsorbed in PCT by simple diffusion.
2. DCT is impermeable to water.
3. On an average, 25-30 gm of urea is excreted out per day.
4. Maximum reabsorption occurs in the loop of Henle.
A person is wearing spectacles with concave lenses for correcting vision. While not using the glasses, the image of a distant object in his case will be formed:
1. on the blind spot
2. behind the retina
3. in front of the retina
4. on the yellow spot
Which one of the following is a fat-soluble vitamin and its related deficiency disease?
1. Ascorbic acid - Scurvy
2. Retinol - Xerophthalmia
3. Cobalamine - Beri-Beri
4. Calciferol - Pellagra
Signals for parturition originate from
1. both placenta as well as fully developed foetus
2. oxytocin released from maternal pituitary
3. placenta only
4. fully developed foetus only
You are required to draw blood from a patient and keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of these will you not use for the purpose?
1. Test tube containing calcium bicarbonate
2. Chilled test tube
3. Test tube containing heparin
4. Test tube containing sodium oxalate
Which of the following is a hormone releasing Intra Uterine Device (IUD)?
1.Multiload 375
2. LNG-20
3. Cervical cap
4. Vault
An example of stretch reflex triggered by passive muscle movement is the
1. tendon reflex
2. ipsilateral reflex
3. flexor reflex
4. patellar reflex
Which one of the following enzymes carries out the initial step in the digestion of milk in humans?
1. Pepsin
2. Rennin
3. Lipase
4. Trypsin
Which of the following match is correct?
1. Cockroach – Crustacea
2. Pila – Pelecypoda
3. Spider – Arachnida
4. Unio – Gastropoda
Which of the following does not belong to Protostomia?
1. Annelids
2. Mollusks
3. Echinoderms
4. Arthropods
A piece of bone, such as femur of frog, if kept in dilute HCI for about a week will
1. assume black colour | 2. shrink in size |
3. turn flexible | 4. crack into pieces |
Which one of the following types of cell is involved in making of the inner walls of large blood vessels?
1. Cuboidal epithelium
2. Columnar epithelium
3. Squamous epithelium
4. Stratified epithelium
A probe which is a molecule used to locate homologous sequences in a mixture of DNA or RNA molecules could be:
1. | A ssRNA | 2. | A ssDNA |
3. | Either RNA or DNA | 4. | Can be ssDNA but not ssRNA |
Who among the following was awarded the Nobel Prize for the development of the PCR technique?
1. | Herbert Boyer | 2. | Hargovind Khurana |
3. | Kary Mullis | 4. | Arthur Kornberg |
In higher vertebrates, the immune system can distinguish self-cells and non-self. If this property is lost due to genetic abnormality and it attacks self-cells, then it leads to :
1. | Active immunity | 2. | Allergic response |
3. | Graft rejection | 4. | Auto-immune disease |
The first human hormone produced by recombinant DNA technology is
1. Insulin
2. Estrogen
3. Thyroxin
4. Progesterone
What type of immunity is used in the treatment of a patient of snakebite?
1. Naturally acquired active immunity
2. Artificially acquired active immunity
3. Artificially acquired passive immunity
4. Naturally acquired passive immunity
Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
1. Relaxin-Gigantism | 2. Prolactin-Cretinism |
3. Parathyroid hormone-Tetany | 4. Insulin-Diabetes insipidus |
Glycogen is a polymer of :
1. Galactose
2. Glucose
3. Fructose
4. Sucrose
The adrenal medulla is functionally related to:
1. Hypothalamic-hypophyseal portal system
2. Parasympathetic neural system
3. Sympathetic neural system
4. Somatic neural system
What is not true regarding vomiting?
1. It is the ejection of stomach contents through the mouth.
2. It is usually voluntary but can occur as a reflex action.
3. It is controlled by the vomit centre in the medulla oblongata.
4. A feeling of nausea precedes vomiting.
Most of the neurons in the cerebral cortex are:
1. | Unipolar | 2. | Bipolar |
3. | Multipolar | 4. | Pseudounipolar |
The final mature follicle is called:
1. | Primordial follicle | 2. | Primary follicle |
3. | Vesicular follicle | 4. | Graafian follicle |
Corpus luteum secretes large amounts of:
1. | LH | 2. | FSH |
3. | Progesterone | 4. | Estrogen |
Multiload – 375 is a:
1. Barrier contraceptive
2. Cu releasing IUD
3. Hormonal IUD
4. Hormonal sub-dermal implant
What causes the movement of the synaptic vesicles towards the membrane during transmission of impulse across a chemical synapse?
1. Sodium | 2. Calcium |
3. cAMP | 4. cGMP |
Identify the incorrectly matched pair:
1. Average duration of a cardiac cycle: 0.8 sec
2. Stroke volume of each ventricle: 120 ml
3. Highest normal systolic blood pressure: 140 mm Hg
4. Highest normal diastolic blood pressure: 90 mm Hg
The type of cartilage that makes epiglottis is:
1. Elastic
2. Hyaline
3. Calcified
4. Fibrous
All the following are the physiological effects of angiotensin II except:
1. Vasoconstriction in renal artery and afferent arteriole
2. Vasodilation in efferent arteriole
3. Increased sodium absorption in PCT
4. Stimulation of adrenal cortex to release aldosterone
During muscle contraction, the length of which of the following remains the same?
1. I-Band
2. H-Zone
3. Sarcomere
4. A-Band
Spooling is :-
(1) Amplification of DNA
(2) Cutting of separated DNA bands from the agarose gel
(3) Transfer of separated DNA fragments to synthetic membranes
(4) Collection of isolated DNA
The pivot joint between the atlas and axis is a type of
1. fibrous joint
2. cartilaginous joint
3. synovial joint
4. saddle joint
Lack of relaxation between successive stimuli in sustained muscle contraction is known as
1. fatigue
2. tetanus
3. tonus
4. spasm
A patient brought to a hospital with myocardial infarction is normally immediately given
1. penicillin
2. streptokinase
3. cyclosporin-A
4. statins
Women who consume the drug thalidomide for relief from vomiting during the early months of pregnancy give birth to children with :
1. | No spleen | 2. | Harelip |
3. | Extra fingers and toes | 4. | Underdeveloped limbs |
Which one of the following item gives its correct total number?
1. Floating ribs in humans - 4
2. Amino acids found in proteins -16
3. Types of diabetes - 3
4. Cervical vertebrae in humans - 8
When “sticky ends” are paired, they can be joined by:
1. | restriction enzymes | 2. | polymerases |
3. | methylase | 4. | DNA ligase |
A homopolymer has only one building block called monomer repeated ‘n’ number of times. A heteropolymer has more than one type of monomers. Proteins are heteropolymers made of amino acids. While a nucleic acid-like DNA or RNA is made of only 4 types of nucleotide monomers, proteins are made up of
1. | 20 types of monomers | 2. | 40 types of monomers |
3. | 3 types of monomers | 4. | Only one type of monomer |
Which of the following is an example for link species?
1. Lobe fish
2. Dodo bird
3. Sea weed
4. Chimpanzee
Tobacco consumption is known to stimulate the secretion of adrenaline and nor-adrenaline. The component causing this could be:
1. | Nicotine | 2. | Tannic acid |
3. | Curamin | 4. | Catechin |
Darwin's in his natural selection Theory did not believe in any role of which one of the following in organic evolution?
1. Parasites and predators as natural enemies
2. Survival of the fittest
3. Struggle for existence
4. Discontinuous variations
In the famous experiment by Louis Pasteur, the straight and long-necked flasks served :
1. as the experimental setup
2. as a control
3. as a cohort
4. no useful purpose
Plica semilunaris on the inside corner of the eye and, muscles in the pinna are:
1. | analogous structures | 2. | homologous structures |
3. | vestigial structures | 4. | phylogenetic structures |
The essay “On the tendencies of Varieties to Depart Indefinitely from the Original Type” was authored by :
1. A.R.Wallace
2. Charles Darwin
3. Charles Lyell
4. Joseph Dalton Hooker
The difference between spermiogenesis and spermiation is:
1. | In spermiogenesis, spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed. |
2. | In spermiogenesis, spermatozoa are formed, while in spermiation spermatids are formed. |
3. | In spermiogenesis, spermatids are formed, while in spermiation spermatozoa are formed. |
4. | In spermiogenesis, spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules. |
The least common of WBCs in the human blood are:
1. Eosinophils | 2. Lymphocytes |
3. Neutrophils | 4. Basophils |