Which of the following masks the active sites on actin when a skeletal muscle is relaxed?
1. | Tropomyosin | 2. | Troponin |
3. | Calmodulin | 4. | Ubiquitin |
Uremia patients can have all the following except:
1. Increased blood glucose between meals
2. Anemia
3. Osteomalacia
4. An acidic blood pH
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
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
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
The ear ossicles transmit sound waves to:
1. Ear drum | 2. Oval window |
3. Round window | 4. Cochlear duct |
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 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 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 |
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
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
Most of the functions of a cell membrane can be attributed to its:
1. Phospholipids
2. Cholesterol
3. Proteins
4. Carbohydrates
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 |
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
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
A reporter enzyme used in biotechnology includes all the following except:
1. Green Fluorescent Protein
2. Luciferase
3.Beta Galactosidase
4. Chloramphenicol acetyl transferase
Which theory, regarding the origin of life, is alternatively also called “panspermia”?
1. | Special Creation | 2. | Spontaneous Generation |
3. | Cosmozoan Theory | 4. | Biochemical Evolution |
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 |
Over 95 % of all transgenic animals are:
1. | Mice | 2. | Pigs |
3. | Sheep | 4. | Rabbits |
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. |
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 |
The plantlets produced during plant tissue culture are called somaclones because:
1. | They can be produced in a very short span of time |
2. | They are the result of the somatic hybridization of two cells |
3. | The gametes develop parthenogenetically to produce genetically identical plantlets |
4. | They are genetically identical to the original plant from which they were grown |
Yucca plant is pollinated by:
1. | Gecko lizard | 2. | Honey bees |
3. | Pronuba moth | 4. | Wind |
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
A drug used to treat attention deficit disorder is :
1. | Valium | 2. | Amphetamine |
3. | LSD | 4. | Psilocybin |
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 |
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. |
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 |
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
Coprophilous fungi grow on:
1. Decaying wood
2. Dung
3. Animal bodies
4. Other fungi
Kingdom Monera in Whittaker’s Five Kingdom classification is not characterized by:
1. Prokaryote cell type
2. Cellulosic cell wall
3. Absence of nuclear membrane
4. Cellular body organization
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
Biradial symmetry is seen in members of:
1. Cnidaria
2. Ctenophora
3. Molluska
4. Hemichordata
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 |
Imbricate aestivation is shown in the diagram part labeled:
1. | A | 2. | B |
3. | C | 4. | D |
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
Closed circulatory system is not seen in:
1. | Vertebrates | 2. | Annelids |
3. | Cephalopod Mollusks | 4. | Aquatic Arthropods |
Which of the following forest plants controls the light conditions at the ground?
1. Lianas and climbers
2. Shrubs
3. Tall trees
4. Herbs
The green scum seen in the freshwater bodies is:
1. Blue-green algae
2. Red algae
3. Green algae
4. Both 1 and 3
High concentrations of accumulated DDT in birds:
1. kills pathogens in their blood
2. causes sterility by affecting gametogenesis
3. leads to premature breaking of eggs
4. causes spasticity of the muscles of the body
Amongst the animal groups given below, which one appears to be more vulnerable to extinction?
1. | Insects | 2. | Mammals |
3. | Amphibians | 4. | Reptiles |
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 % |
Primary carnivores are, most aptly, characterized as:
1. | Secondary producers | 2. | Primary consumers |
3. | Secondary consumers | 4. | Tertiary consumers |
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
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 |
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 |
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
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
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.
Glenoid cavity articulate
1. Clavicle with acromion
2. Scapula with acromion
3. Clavicle with scapula
4. Humerus with scapula
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.
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
Which of the following is an amino acid derived hormone?
1. Estradiol
2. Ecdysone
3. Epinephrine
4. Estriol
Which of the following is hormone-releasing IUD?
1. | Multiload 375 | 2. | Lippes loop |
3. | Cu7 | 4. | LNG-20 |
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 initial step in the digestion of milk in humans is carried out by?
1. Lipase
2. Trypsin
3. Rennin
4. Pepsin
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
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
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 coconut water from tender coconut represents:
1. Free nuclear endosperm
2. Endocarp
3. Fleshy mesocarp
4. Free nuclear proembryo
Both, autogamy and geitonogamy are prevented in -
1. Papaya
2. Cucumber
3. Castor
4. Maize
Golden rice will help in -
1. Producing petrol-like fuel
2. Pest resistance
3. Herbicide tolerance
4. Alleviation of vitamin A deficiency
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
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
In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called :
1. cross-hybridisation among the selected parents.
2. evaluation and selection of parents.
3. germplasm collection.
4. selection of superior recombinants.
For retting of jute the fermenting microbe used is
1. Mesophilic bacteria
2. Helicobacter pylori
3. Butyric acid bacteria
4. Streptococcus lactis
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
Male gametes are flagellated in:
1. Anabaena
2. Ectocarpus
3. Spirogyra
4. Polysiphonia
One of the major components of cell wall of most fungi is :
1. Hemicelluloses
2. Chitin
3. Peptidoglycan
4. Cellulose
Three crops that contribute maximum to global food production are
1. Wheat, Rice and Maize
2. Wheat, Rice and Barley
3. Wheat, Maize and Sorghum
4. Rice, Maize and Sorghum
Casparian strips occur in
1. Epidermis | 2. Endodermis |
3. Cortex | 4. Pericycle |
In male cockroaches, sperms are stored in which part of the reproductive system?
1. Vas deferens
2. Seminal vesicles
3. Mushroom glands
4. Testes
What is common between parrot, platypus and kangaroo?
1. | toothless jaws | 2. | functional post-anal tail |
3. | ovoparity | 4. | homoiothermy |
Match the items given in Column I with those given in Column II and select the correct option given below:
A. |
Eutrophication |
i. |
UV-B radiation |
B. |
Sanitary landfill |
ii. |
Deforestation |
C. |
Snow blindness |
iii. |
Nutrient enrichment |
D. |
Jhum cultivation |
iv. |
Waste disposal |
A | B | C | D | |
1. | ii | i | iii | iv |
2. | i | ii | iv | iii |
3. | iii | iv | i | ii |
4. | i | iii | iv | ii |
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
An easily disturbed ecosystem which can recover after some time after the stoppage of damaging factor is of
1. Low stability and high resilience
2. High stability and high resilience
3. Low stability and low resilience
4. High stability and low resilience
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
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 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
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
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 |
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
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
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
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 |
How many true-breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
1. 2
2. 14
3. 6
4. 4
Embryological support for evolution was disapproved by:
1. Alfred Wallace
2. Charles Darwin
3. Oparin
4. Karl Ernst von Baer
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) |
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)