What do A, B, C and D represent in the following figure?
A | B | C | D | |
1. | carrier protein | symport | uniport | antiport |
2. | carrier protein | uniport | antiport | symport |
3. | carrier protein | antiport | symport | uniport |
4. | carrier protein | uniport | symport | antiport |
Based on your knowledge about root pressure given in section 11.3.2.1 , NCERT, can you think which of the following will play the most important role in development?
1. Epidermal hair
2. Endodermis
3. Cortex cells
4. Pericycle
Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
1. Frequent irrigation of the crop
2. Treatment of the plants with cytokinins along with a small dose of nitrogenous fertilizer
3. Removal of all yellow leaves and spraying the remaining green leaves with 2, 4, 5 trichlorophenoxy acetic acid
4. Application of iron and magnesium to promote synthesis of chlorophyll
The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
1. there is a change in the permeability of the inner mitochondrial membrane toward adenosine diphosphate (ADP)
2. high energy bonds are formed in mitochondrial proteins
3. ADP is pumped out of the matrix into the intermembrane space
4. a proton gradient forms across the inner membrane
The primary acceptor in plants is:
1. RuBP in mesophyll cells
2. RuBP in bundle sheath cells
3. PEP in mesophyll cells
4. PEP in bundle sheath cells
Glycolysis is found in the cytoplasm of virtually all types of aerobic/anaerobic cells. In this process, glucose is converted into :
1. | PEP | 2. | acetyl CoA |
3. | pyruvic acid | 4. | citric acid |
The number of ATP molecules synthesized from oxidation of one molecule of NADH and one molecule of are respectively:
1. | 3 and 2 | 2. | 2 and 3 |
3. | 1 and 1 | 4. | 2 and 1 |
Match the following :
A. IAA | i. Herring sperm DNA |
B. ABA | ii. Bolting |
C. Ethylene | iii. Stomatal closure |
D. GA | iv. Weed-free lawns |
E. Cytokinins | v. Ripening of fruits |
Options:
A | B | C | D | E | |
1. | iv | iii | v | ii | i |
2. | v | iii | iv | ii | i |
3. | iv | i | v | iii | ii |
4. | v | iii | ii | i | iv |
A thick layer of fat, blubber, beneath the skin is found in:
1. Terrestrial mammals of colder climates
2. Aquatic mammals of colder climates
3. Terrestrial mammals of warmer climates
4. Aquatic mammals of warmer climates
Amongst the animal groups given below, which one appears to be more vulnerable to extinction?
1. | Insects | 2. | Mammals |
3. | Amphibians | 4. | Reptiles |
Which of the following forest plants controls the light conditions at the ground?
1. Lianas and climbers
2. Shrubs
3. Tall trees
4. Herbs
One of the major components of cell wall of most fungi is :
1. Hemicelluloses
2. Chitin
3. Peptidoglycan
4. Cellulose
At the root tip, the cells that are responsible for the growth of the root in length are located in the region that is:
1. distal to the region of meristematic activity
2. proximal to the region of meristematic activity
3. proximal to the region of maturation
4. distal to the region of elongation
Imbricate aestivation is shown in the diagram part labeled:
1. | A | 2. | B |
3. | C | 4. | D |
Identify the stage of meiotic cell division shown in the given diagram:
1. | Anaphase I | 2. | Anaphase II |
3. | Telophase I | 4. | Telophase II |
Cells of this tissue are living and show angular wall thickening. They also provide mechanical support. The tissue is
1. Xylem | 2. Sclerenchyma |
3. Collenchyma | 4. Epidermis |
Coprophilous fungi grow on:
1. Decaying wood
2. Dung
3. Animal bodies
4. Other fungi
Consider the following two statements:
I. The spread of living pteridophytes is restricted to narrow geographical regions
II. They are the first terrestrial plants to possess vascular tissues
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is true but II is false
4. I is false but II is true
Match each item in Column I with one in Column II and choose your answer from the codes given below:
COLUMN I | COLUMN II |
Taxonomical aid | Feature |
I. Flora | a. Useful in providing information for identification of names of species found in an area |
II. Manuals | b. Contains the actual account of habitat and distribution of plants of a given area. |
III. Monographs | c. Contain information on any one taxon |
Codes:
I | II | III | |
1. | a | b | c |
2. | c | b | a |
3. | b | a | c |
4. | b | c | a |
For retting of jute the fermenting microbe used is
1. Mesophilic bacteria
2. Helicobacter pylori
3. Butyric acid bacteria
4. Streptococcus lactis
A pleiotropic gene:
1. is a gene evolved during Pliocene.
2. controls a trait only in combination with another gene
3. controls multiple traits in an individual.
4. is expressed only in primitive plants
Both, autogamy and geitonogamy are prevented in -
1. Papaya
2. Cucumber
3. Castor
4. Maize
Okazaki fragments during DNA replication
1. Polymerise in 3’ → 5’ direction and form replication fork
2. Prove semiconservative DNA replication
3. Polymerise in 5’ → 3’ direction and explain 3’ → 5’ DNA replication
4. Cause transcription
The final proof for DNA as the genetic material came from the experiments of
1. Griffith
2. Hershey and Chase
3. Avery, Macleod and McCarty
4. Hargobind Khorana
T. H. Morgan worked on the fruit fly, Drosophila melanogaster. Which of the following is not an advantage of this fly?
1. | They could be grown on a simple synthetic medium in the laboratory. |
2. | They complete their life cycle in about two years, and a single mating could produce a large number of progeny flies. |
3. | There was a clear differentiation of the sexes – the male and female flies are easily distinguishable. |
4. | It has many types of hereditary variations that can be seen with low-power microscopes. |
A very low level of expression of the lac operon has to be present in the cell:
1. | When lactose is present | 2. | When lactose is absent |
3. | When glucose is absent | 4. | All the time |
Which of the following is not a character of anemophilous flowers?
1. Pollens are light and non sticky
2. Stamens are well exposed
3. Have large, often feathery stigma
4. Have multiple ovules in each ovary
Yucca plant is pollinated by:
1. | Gecko lizard | 2. | Honey bees |
3. | Pronuba moth | 4. | Wind |
Consider the following statements regarding
Y chromosome in humans:
I. | Y chromosome is a male-determining chromosome in humans |
II. | Y chromosome contains a gene, SRY, which triggers embryonic development as a male |
III. | 50 % of sons of a male inherit his Y chromosome |
Of the given statements, the correct statements are:
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
Which of the following is likely if there is a mutation in the lacY gene of the lac operon in E.coli?
1. | The lac genes would be expressed efficiently only in the absence of lactose. |
2. | The lac genes would be expressed efficiently until the lactose supply in the cell is exhausted. |
3. | The lac genes would be expressed continuously. |
4. | Expression of the lac genes would cease immediately. |
In the secondary treatment or biological treatment of sewage water, the primary effluent is passed into large aeration tanks where it is constantly agitated mechanically and the air is pumped into it. This allows:
1. vigorous growth of useful aerobic microbes into flocs
2. the decrease in the number of aerobes in the water
3. rapid increase in the count of methanogens
4. a dramatic decrease in the anaerobic methanogens
With respect to meiosis, when does DNA replication occur?
1. | Before meiosis I only | 2. | After meiosis I only |
3. | Before and after meiosis I | 4. | After meiosis II |
Most of the functions of a cell membrane can be attributed to its:
1. Phospholipids
2. Cholesterol
3. Proteins
4. Carbohydrates
The biosynthesis of ribosomal RNA occurs in:
1. | Ribosomes | 2. | Golgi apparatus |
3. | Microbodies | 4. | Nucleolus |
Match the following events that occur in their respective phases of cell cycle and select the correct option
(a) | G1 phase | (i) | Cell grows and organelle duplication |
(b) | S phase | (ii) | DNA replication and chromosome duplication |
(c) | G2 phase | (iii) | Cytoplasmic growth |
(d) | Metaphase in M-phase | (iv) | Alignment of chromosomes |
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (iv) | (i) |
2. | (iii) | (iv) | (i) | (ii) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (i) | (ii) | (iii) | (iv) |
Graph below is a diagrammatic representation of response of organisms to biotic factors. What do a,b,c represent respectively?
1. Partial regulator, conformer, regulator
2. Regulator, conformer, Partial regulator
3. Conformer, regulator, Partial, regulator
4. Regulator, Partial conformer, regulator
Approximately how much of the solar energy that falls on the leaves of a plant is converted to chemical energy by photosynthesis?
1. | Less than 1% | 2. | 2-10 % |
3. | 30 % | 4. | 50 % |
What is the most effective way to conserve plant diversity of an area?
1. Tissue culture
2. Botanical garden
3. Biosphere reserves
4. Seed banks
The green scum seen in the freshwater bodies is:
1. Blue-green algae
2. Red algae
3. Green algae
4. Both 1 and 3
In eubacteria, a cellular component that resembles eukaryotic cells is
1. | Plasma membrane | 2. | Nucleus |
3. | Ribosomes | 4. | Cell wall |
Onion root tip has 16 chromosomes in each cell. How many chromosomes will the cell respectively have at G1 phase, after S phase and after M phase?
1. 16, 32, 16 | 2. 16, 32, 8 |
3. 16, 16, 8 | 4. 16, 16, 16 |
Common between vegetative reproduction and apomixis is
1. Both applicable to dicots
2. Both bypass flowering phase
3. Both occur around the year
4.Both produce progeny identical to parent
When a cluster of genes show linkage behaviour, they:
1. | Do not show chromosome map |
2. | Induce cell division |
3. | Do not show independent assortment |
4. | Show recombination during meiosis |
Which one of the following symbols and its representation, used in human pedigree analysis is correct?
The coconut water from tender coconut represents:
1. Free nuclear endosperm
2. Endocarp
3. Fleshy mesocarp
4. Free nuclear proembryo
In a transcription unit, with respect to structural genes, the promoter is located:
1. | Upstream and 5’ | 2. | Upstream and 3’ |
3. | Downstream and 5’ | 3. | Downstream and 3’ |
The discontinuously synthesized DNA fragments are later joined by:
1. | DNA helicase | 2. | Topoisomerase |
3. | DNA ligase | 4. | DNA polymerase |
Identify the option where the Crop [Column I], Variety [Column II], and Resistance to diseases [Column III] are not correctly matched:
CROP |
VARIETY |
RESISTANCE TO |
|
1. |
Wheat |
Himgiri |
Leaf and stripe rust |
2. |
Brassica |
Karan rai |
White rust |
3. |
Cowpea |
PusaShubhra |
Bacterial blight |
4. |
Chilli |
PusaSadabahar |
Mosaic virus |
In which one of the following, both autogamy and geitonogamy are prevented?
1. Wheat
2. Papaya
3. Castor
4. Maize
Which of the following is an innovative remedy for plastic waste?
1. | Burning in the absence of oxygen |
2. | Burying 500 m deep below the soil surface |
3. | Polyblend |
4. | Electrostatic precipitator |
Which of the following statement is correct in relation to the endocrine system?
1. Adenohypophysis is under direct neural regulation of the hypothalamus
2. Organs in the body like gastrointestinal tract, heart, kidney and liver do not produce any hormones
3. Non-nutrient chemicals produced by the body in trace amount that act as intercellular messenger are known as hormones
4. Releasing and inhibitory hormones are produced by the pituitary gland
Select the incorrect statement
1. LH and FSH trigger ovulation in ovary
2. LH and FSH decrease gradually during the follicular phase
3. LH triggers secretion of androgens from the Leydig cells
4. FSH stimulates the Sertoli cells which help in spermiogenesis
When a man inhales air containing normal concentration of O2 as well as CO he suffers from suffocation because
1. CO reacts with , reducing its percentage in air
2. haemoglobin combines with CO instead of and forms carboxyhaemoglobin
3. CO affects diaphragm and intercostal muscles
4. CO affects the nerves of the lungs
What is common between parrot, platypus and kangaroo?
1. | toothless jaws | 2. | functional post-anal tail |
3. | ovoparity | 4. | homoiothermy |
Closed circulatory system is not seen in:
1. | Vertebrates | 2. | Annelids |
3. | Cephalopod Mollusks | 4. | Aquatic Arthropods |
In male cockroaches, sperms are stored in which part of the reproductive system?
1. Vas deferens
2. Seminal vesicles
3. Mushroom glands
4. Testes
Biradial symmetry is seen in members of:
1. Cnidaria
2. Ctenophora
3. Molluska
4. Hemichordata
What are the structures labeled 1, 2, 3 and 4 respectively in the given diagram?
1. Lamellae, Osteocyte, Haversian canal, Canaliculi
2. Lamellae, Osteocyte, Volkman’s canal, Canaliculi
3. Canaliculi, Osteocyte, Haversian canal, Lamellae
4. Canaliculi, Osteocyte, Volkman’s canal, Lamellae
Which one of the following is not correctly matched?
1. Aedes aegypti - Yellow fever
2. Anopheles culifacies - Leismaniasis
3. Glossina palpalis - Sleeping sickness
4. Culex pipiens - Filariasis
Golden rice will help in -
1. Producing petrol-like fuel
2. Pest resistance
3. Herbicide tolerance
4. Alleviation of vitamin A deficiency
Production of human protein in bacterial genetic engineering is possible because
1. Human chromosome replicate bacterial cell
2. Mechanism of gene regulation is identical in humans and bacteria
3. Bacterial cell can undertake RNA splicing
4. Genetic code is universal
A drug used to treat attention deficit disorder is :
1. | Valium | 2. | Amphetamine |
3. | LSD | 4. | Psilocybin |
Over 95 % of all transgenic animals are:
1. | Mice | 2. | Pigs |
3. | Sheep | 4. | Rabbits |
A reporter enzyme used in biotechnology includes all the following except:
1. Green Fluorescent Protein
2. Luciferase
3.Beta Galactosidase
4. Chloramphenicol acetyl transferase
The initial step in the digestion of milk in humans is carried out by?
1. Lipase
2. Trypsin
3. Rennin
4. Pepsin
Which of the following is hormone-releasing IUD?
1. | Multiload 375 | 2. | Lippes loop |
3. | Cu7 | 4. | LNG-20 |
Which of the following is an amino acid derived hormone?
1. Estradiol
2. Ecdysone
3. Epinephrine
4. Estriol
Given below is the ECG of a normal human. Which one of its components is correctly interpreted below?
1. Peak P- Initiation of left atrial contraction only
2. Complex QRS- One complete pulse
3. Peak T- Initiation of total cardiac contraction
4. Peak P and Peak R together- systolic and diastolic blood pressures
In feedback inhibition, a metabolic pathway is switched off by:
1. a rise in temperature
2. lack of a substrate
3. accumulation of the end product
4. competitive inhibition
Parts a, b, c and d of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics
1. a-Retina-contains photo receptors-rods and cones.
2. b-Blind spot-has only a few rods and cones.
3. c-Aqueous chamber-reflects the light which does not pass through the lens.
4. d-Choroid-its anterior part forms ciliary body.
Glenoid cavity articulate
1. Clavicle with acromion
2. Scapula with acromion
3. Clavicle with scapula
4. Humerus with scapula
Human urine is usually acidic because
1. hydrogen ions are actively secreted into the filtrate.
2. the sodium transporter exchanges one hydrogen ion for each sodium ion, in peritubular capillaries.
3. excreted plasma proteins are acidic.
4. Potassium and sodium exchange generates acidity.
Identify the incorrect statement regarding thyroid gland:
1. The two lobes are connected by an isthmus
2. Iodine is essential for synthesis of T3 and T4 by thyroid
3. The follicles are lined by cuboidal epithelium
4. All hormones secreted by thyroid are iodothyronines
Fats are broken down by lipases with the help of bile into:
1. Micelles
2. Chylomicrons
3. Di-andmonoglycerides
4. Diacyl glycerol and inositol phosphate
The correct sequence of male sex accessory ducts beginning from testis would be:
1. | rete testis → vasa efferentia → epididymis → vas deferens |
2. | rete testis → vas deferens → vasa efferentia → epididymis |
3. | vas deferens → vasa efferentia → epididymis → rete testis |
4. | vasa efferentia → vasa deferens → epididymis → rete testis |
The incidence of sexually transmitted infections is reported to be very high among persons in the age group of:
1. | 15 - 24 years | 2. | 25 - 34 years |
3. | 35 - 44 years | 4. | 45 - 54 years |
The first movements of the fetus and the appearance of hair on the head are usually observed during:
1. | 2nd month | 2. | 3rd month |
3. | 5th month | 4. | 6th month |
The ear ossicles transmit sound waves to:
1. Ear drum | 2. Oval window |
3. Round window | 4. Cochlear duct |
Identify the correct match:
1. Nociception: perception or awareness of the position and movement of the body
2. Proprioception: sensory nervous system's response to certain harmful or potentially harmful stimuli
3. Gustation: sensation of taste
4. Olfaction: sensation of hearing
An Rh +ve female is pregnant with an Rh –ve fetus for the second time. The consequences can be:
1. The fetus can have severe anemia or jaundice
2. The mother can have delayed reactions and may develop jaundice
3. There will be no consequences
4. The fetus will have growth and mental retardation
The trachea divides into a right and a left primary bronchi at the level of:
1. 3rd thoracic vertebra
2. 5th thoracic vertebra
3. 7th thoracic vertebra
4. 12th thoracic vertebra
During the counter current mechanism, small amount of urea from interstitium enters:
1. the collecting duct
2. the thin segment of ascending limb of loop of Henle
3. the ascending limb of vasa recta
4. the descending limb of vasa recta
Uremia patients can have all the following except:
1. Increased blood glucose between meals
2. Anemia
3. Osteomalacia
4. An acidic blood pH
Which of the following masks the active sites on actin when a skeletal muscle is relaxed?
1. | Tropomyosin | 2. | Troponin |
3. | Calmodulin | 4. | Ubiquitin |
Match the following :
(a) Aquaporin (i) Amide
(b) Asparagine (ii) Polysaccharide
(c) Abscisic acid (iii) Polypeptide
(d) Chitin (iv) Carotenoids
Select the correct option :
1. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
2. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
3. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
4. (a)-(iii), (b)-(i), (c) -(ii), (d)-(iv)
The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in
1. vertebrae
2. nails
3. ear ossicles
4. tip of the nose
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis is
1. spermatocyte spermatogonia spermatid sperms
2. spermatogonia spermatocyte spermatid sperms
3. spermatid spermatocyte spermatogonia sperms
4. spermatogonia spermatid spermatocyte sperms
The number of high energy bonds in a molecule of ATP is:
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
Which of the following is not required in the preparation of a recombinant DNA molecule?
1. | Restriction endonuclease | 2. | DNA ligase |
3. | DNA fragments | 4. | E.coli |
Aedes aegypti is not a vector for:
1. | Dengue | 2. | Chikungunya |
3. | Japanese encephalitis | 4. | Yellow fever |
A group of animals related by descent and similar in most characteristics like general appearance, features, size, configuration, etc., are said to belong to a:
1. | Variety | 2. | Species |
3. | Strain | 4. | Breed |
Which of the following would be an example of a population that can show the potential for rapid speciation?
1. small in number but highly variable gene pool
2. large in number with large variations in the gene pool
3.sexual dimorphism amongst members
4.isolated inbred population
Around 200 mya, some land reptiles went back to the water to evolve into fish-like reptiles, for example:
1. | Pareiasaurus | 2. | Pelycosaurus |
3. | Ichthyosaurs | 4. | Archosaurus |
Which theory, regarding the origin of life, is alternatively also called “panspermia”?
1. | Special Creation | 2. | Spontaneous Generation |
3. | Cosmozoan Theory | 4. | Biochemical Evolution |
What happens during fertilisation in humans after many sperms reach close to the ovum?
1. | Only two sperms nearest the ovum penetrate zona pellucida. |
2. | Secretion of acrosome helps one sperm enter the cytoplasm of the ovum through zona pellucida. |
3. | All sperms except the one nearest to the ovum lose their tails. |
4. | Cells of corona radiata trap all the sperms except one. |
The only hormone secreted by pars intermedia of hypophysis is:
1. MSH | 2. GnRH |
3. Vasopressin | 4. Prolactin |
Cardiac activity could be moderated by the autonomic nervous system. Tick the correct answer:
1. The parasympathetic system stimulates heart rate and stroke volume
2. The sympathetic system stimulates heart rate and stroke volume
3. The parasympathetic system stimulates heart rate but decreases stroke volume
4. The sympathetic system stimulates heart rate but decreases stroke volume
The thigh bone articulates with the coxal:
1. | Acetabulum | 2. | Obturator foramen |
3. | Glenoid cavity | 4. | Coracoid process |
The diagram below shows:
1. The Bohr effect
2. The chloride shift
3. The Haldane effect
4. Hering-Breuer reflex
Embryological support for evolution was disapproved by:
1. Alfred Wallace
2. Charles Darwin
3. Oparin
4. Karl Ernst von Baer