Which of the following is a sesamoid bone?
1. Sternum
2. Clavicle
3. Patella
4. Navicular
The urine examination of a healthy person should not show the presence of:
1. | nitrogenous waste | 2. | chloride |
3. | protein | 4. | sodium |
Where do you expect to find the following events takings place?
1. RBC in venous capillary at tissues
2. RBC in arterial capillary at tissues
3. RBC in venous capillary at lungs
4. RBC in arterial capillary at lungs
To begin the blood clot formation cascade, the enzyme complex required is:
1. | Thromboxane A2 | 2. | Thrombin |
3. | Thrombokinase | 4. | Heparin |
Reissner’s membrane in the inner ear separates the cochlear duct [scala media] from the:
1. round window | 2. scale vestibuli |
3. scala tympani | 4. basilar membrane |
Oral contraceptive pills do not:
1. Inhibit ovulation
2. Prevent implantation
3. Alter cervical mucus
4. Kill sperms
Changes in the ovary and the uterus, during the menstrual cycle, are induced by the changes in the levels of secretion of:
1. | Ovarian hormones | 2. | Pituitary hormones |
3. | Both | 4. | None |
Consider the following two statements:
I: | The hymen is often torn during the first coitus. |
II: | The presence or absence of hymen is a reliable indicator of virginity. |
Of the two statements:
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 correct but II is incorrect.
4. Both I and II are incorrect.
Which of the following parts of the human brain functions as a gateway to the cerebrum and is a major coordinating center for sensory and motor signaling?
1. Thalamus | 2. Hypothalamus |
3. Corpora quadrigemina | 4. Pons |
The specific role of bile pigments with respect to fat utilization is:
1. Emulsification
2. Micelle formation
3. Enterohepatic circulation
4. Nothing
The function of aldosterone is mainly:
1. reabsorption of sodium and water at distal renal tubules
2. growth of axial, pubic and facial hair
3. vasodilation leading to polyuria
4. mobilization of metabolites for energy
An enzyme brings about :
1. Decrease in reaction time
2. Increase in reaction time
3. Increase in activation energy
4. Reduction in activation energy
Consider the following statements:
I: | Meiosis never occurs in organisms that are haploid |
II: | Gametes are haploid and the parent plant body from which they arise must be diploid |
1. Only I is correct
2. Only II is correct
3. Both I and II are incorrect
4. Both I and II are correct
What would happen if oxygen availability to activated sludge flocs is reduced?
1. | It will slow down the rate of degradation of organic matter. |
2. | The center of flocs will become anoxic, which would cause the death of bacteria and eventually breakage of flocs. |
3. | Flocs would increase in size as anaerobic bacteria would grow around flocs. |
4. | Protozoa would grow in large numbers. |
The “Replica Plating Experiment” proved that :
1. most mutations are harmful or neutral
2. mutations are recurring in nature
3. all mutations are pre-adaptive in nature
4. mutations occur in a non-directional manner
The dinosaurs suddenly disappeared about:
1. 50 mya
2. 65 mya
3. 75 mya
4. 90 mya
The radius of the double helix of B-DNA [Watson and Crick model] is approximately:
1. | 1.0 nm | 2. | 2.0 nm |
3. | 0.34 nm | 4. | 3.4 nm |
The management of animals for milk and its products for human consumption is called:
1. | Animal breeding | 2. | Dairying |
3. | Domestication | 4. | Animal husbandry |
A typical angiosperm anther is:
1. Bilobed and polythecous
2. Unilobed and monothecous
3. Multilobed and monothecous
4. Bilobed and dithecous
Which of the following is a recombinant vaccine?
1. | BCG | 2. | OPV |
3. | Hepatitis B | 4. | MMR |
Hershey and Chase proved DNA as the genetic material in their experiment because :
1. | Bacteria that were infected with viruses that had radioactive proteins were not radioactive. |
2. | Bacteria that were infected with viruses that had radioactive DNA were radioactive. |
3. | Both 1 and 2 are correct. |
4. | Both 1 and 2 are incorrect. |
The number of alleles, the genotypic combinations, and phenotypes in the ABO system are respectively:
1. | 3, 6 and 4 | 2. | 3, 4 and 6 |
3. | 2, 3 and 4 | 4. | 2, 3, and 6 |
Sickle cell anaemia results from:
1. A chromosomal aberration
2. Non-disjunction of autosome
3. A point mutation
4. Blood transfusion reaction
Autogamy can occur in a chasmogamous flower if:
1. Pollen matures before the maturity of ovule.
2. Ovules mature before the maturity of pollen.
3. Both pollen and ovules mature simultaneously.
4. Both anther and stigma are of equal lengths.
Which of the following statements does not hold true for restriction enzyme?
1. | It recognises a palindromic nucleotide sequence |
2. | It is an endonuclease |
3. | It is isolated from viruses |
4. | It can produce the same kind of sticky ends in different DNA molecules |
Choose the correct option regarding Retrovirus:
1. | An RNA virus that synthesises DNA during infection |
2. | A DNA virus that synthesises RNA during infection |
3. | A ssDNA virus |
4. | A dsRNA virus |
Isolated metabolic reaction in a cell-free system:
1. Can be demonstrated
2. Is not a living reaction
3. Is a living thing
4. Is faster than in the living cell
Which of the following is not seen in red algae?
1. | 2 unequal flagella | 2. | Cellulose cell wall |
3. | Phycoerythrin | 4. | Floridean starch |
Match each item in Column I with one in Column II and choose the correct answer from the codes given:
COLUMN I |
COLUMN II |
A. Mucor |
a. Pin mould |
B. Rhizopus |
b. Bread mould |
C. Albugo |
c. White rust |
D. Pythium |
d. Damping-off of seedlings |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | c | d |
3. | a | b | d | c |
4. | b | a | d | c |
The correct chronology of the steps seen in the sexual cycle in fungi will be:
1. Plasmogamy – Karyogamy – Meiosis in zygote
2. Karyogamy – Plasmogamy – Meiosis in zygote
3. Plasmogamy – Meiosis in zygote – Karyogamy
4. Karyogamy – Meiosis in zygote – Plasmogamy
Which stage of meiosis is shown in the diagram given below?
1. | Metaphase I | 2. | Metaphase II |
3. | Anaphase I | 4. | Anaphase II |
In a dicot root, the number of patches of xylem and phloem are usually:
1. | 2 to 4 | 2. | 4 to 6 |
3. | 6 to 8 | 4. | 8 to 10 |
An asymmetric flower is seen in:
1. Mustard
2. Pea
3. Cassia
4. Canna
Stem tendrils are present in all the following except:
1. Citrus | 2. Watermelon |
3. Cucumber | 4. Grapevines |
To which one of the following categories does adipose tissue belong?
1. Epithelial | 2. Connective |
3. Muscular | 4. Neural |
Approximately what percentage of existing animal species are invertebrates?
1. | 20% | 2. | 50% |
3. | 70% | 4. | 95% |
Which one of these is not a eukaryote?
1. Euglena
2. Anabaena
3. Spirogyra
4. Agaricus
The intensity of noise beyond which physical discomfort is:
1. 70 dB
2. 80 dB
3. 100 dB
4. 120 dB
The Montreal Protocol was signed in 1987 to:
1. | prevent deforestation around the world |
2. | control the emission of ozone-depleting substances |
3. | control the greenhouse gases |
4. | prevent hazards from radioactive nuclear wastes |
The first National Park established in India, the place where project tiger was started in 1972, is in:
1. | Madhya Pradesh | 2. | Kerala |
3. | West Bengal | 4. | Uttarakhand |
The function of a reservoir of nutrient cycle is to:
1. synthesize minerals
2. transfer minerals to other ecosystems
3. meet any deficit
4. destroy the unwanted minerals
One mechanism that promotes co-existence rather than exclusion amongst competing species is:
1. | Periodic migration | 2. | Hibernation and aestivation |
3. | Resource partitioning | 4. | Reproductive isolation |
The extent of geographical distribution for eurythermals and stenothermals is expected to be:
1. Equal for both
2. Larger for the former
3. Smaller for the former
4. Cannot be predicted
Plants follow different pathways in response to environment or phases of life to form different kinds of structures. This ability is called:
1. Efficiency index | 2. Plasticity |
3. Norm of reaction | 4. Developmental noise |
Primary macronutrients are heavily used by plants. Based on your understanding of role of macronutrients , section 12.2.2, NCERT, can you predict which of the following may be a secondary macronutrient for plants?
1. Nitrogen
2. Phosphorus
3. Potassium
4. Calcium
In the mycorrhizal symbiotic relationship, the root provides the fungus with:
1. Water | 2. Phosphorus |
3. N – containing compounds | 4. Sodium and potassium |
What differentiates active transport from facilitated diffusion?
I. Uphill transport
II. Requirement of special membrane proteins
III. Selective nature
1. Only I
2. Only I and II
3. Only I and III
4. Only II and III
The most important reason for the fact that reptiles were the first animals to be successful on land is:
1. Internal fertilization
2. Skin covered with scales
3. Partially divided ventricles
4. Presence of amnion
Chemically, hormones are
1. Proteins, steroids and biogenic amines.
2. Proteins only.
3. Steroids only.
4. Biogenic amines only.
Convergent evolution is illustrated by
1. rat and dog.
2. bacterium and protozoan
3. starfish and cuttlefish
4. dogfish and whale
Read the following four statements (A-D):
(A) In transcription, adenosine pairs with uracil.
(B) Regulation of lac operon by repressor is referred to as positive regulation.
(C) The human genome has approximately 50,000 genes.
(D) Haemophilia is a sex-linked recessive disease.
How many of the above statements are right ?
1. Two
2. Three
3. Four
4. One
Male gametophyte with the least number of cells is present in:
1. | Pteris | 2. | Funaria |
3. | Lilium | 4. | Pinus |
An analysis of chromosomal DNA using the Southern hybridization technique does not use:
1. Electrophoresis
2. Blotting
3. Autoradiography
4. PCR
Asthma may be attributed to :
1. accumulation of fluid in the lungs
2. bacterial infection of the lungs
3. allergic reaction of the mast cells in the lungs
4. inflammation of the trachea
If both parents are carrier for thalessemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child ?
1. 50%
2. 25 %
3. 100%
4. no chance
A normal woman whose father was colour blind is married to normal visioned man. Their sons would be
1. 75% colour blind
2. 50% colour blind
3. 100% colour blind
4. All normal.
Homozygous purelines in cattle can be obtained by:
1. mating of related individuals of same breed.
2. mating of unrelated individuals of same breed.
3. mating of individuals of different breed.
4. mating of individuals of different species.
The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals include the:
1. | Halophiles | 2. | Thermoacidophiles |
3. | Methanogens | 4. | Eubacteria |
If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?
1. | Telophase | 2. | Anaphase |
3. | Prophase | 4. | Metaphase |
Pollen chamber present in gymnosperms represents
1. Microsporangium
2. Pollen grain cell where sperms are formed
3. Opening of megagametophyte for passage of pollen tube to egg
4. Cavity in nucellus for resting pollen grains after pollination
Besides paddy fields, cyanobacteria are also found inside vegetative part of :
1. Cycas
2. Equisetum
3. Psilotum
4. Pinus
Banana is
1. Cremocarp
2. Parthenocarpic berry
3. Drupe
4. Capsule
Gymnosperms are also called soft wood spermatophytes because they lack
1. Cambium
2. Phloem fibres
3. Thick-walled tracheids
4. Xylem fibres
During an injury, nasal septum gets damaged. For its restoration, which cartilage is preferred?
1. Hyaline cartilage
2. Elastic cartilage
3. Calcified cartilage
4. Fibro cartilage
Which of the following statements is correct regarding cockroach?
1. Compound eye is also called as ocellus
2. Spiracle helps in excretion
3. Phallomere is present in female cockroach
4. Ventral nerve cord
During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?
1. | G0 and G1 | 2. | G1 and S |
3. | Only G2 | 4. | G2 and M |
Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component "X" in it.
Category Component
1. Cholesterol Guanine
2. Amino acid NH2
3. l Nucleotide Adenine
4. Nucleoside Uracil
"Good ozone" is found in the:
1. Mesosphere
2. Troposphere
3. Stratosphere
4. Ionosphere
World summit on Sustainable Development (2002) was held in
1. Argentina
2. Brazil
3. South Africa
4. Sweden
A species facing extremely high risk of extinction in the immediate future is called:
1. Vulnerable
2. Endemic
3. Critically Endangered
4. Extinct
Niche is
1. all the biological factors in the organism's environment
2. the functional role played by the organism where it lives
3. the range of temperature that the organism needs to live
4. the physical space where an organism lives
If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?
plant → mice → snake → peacock
1. 0.02 J
2. 0.002 J
3. 0.2 J
4. 0.0002 J
Fruit and leaf drop at early stages can be prevented by the application of
1. | cytokinins | 2. | ethylene |
3. | auxins | 4. | gibberellic acid |
Which statement is wrong for Krebs cycle?
1. There are three points in the cycle where is reduced to NADH +
2. There is one point in the cycle where is reduced to
3. During conversion of succinyl Co-A to succinic acid, a molecule of GTP is synthesised
4. The cycle starts with condensation of acetyl group (acetyl Co-A) with pyruvic acid to yield citric acid
In a chloroplast the highest number of protons are found in
1. | lumen of thylakoids | 2. | inter membrane space |
3. | antenna complex | 4. | stroma |
Emerson's enhancement effect and red drop have been instrumental in the discovery of
1. two photosystems operating simultaneously
2. photophosphorylation and cyclic electron transport
3. Oxidative phosphorylation
4. photophosphorylation and non-cyclic electron transport
In old age, stiffness of joints is due to the
1. hardening of bones
2. inefficiency of muscles
3. decrease in synovial fluid
4. enlargement of bones
Assisted reproductive technology, IVF involves transfer of
1. ovum into the fallopian tube
2. zygote into the fallopian tube
3. zygote into the uterus
4. embryo with 16 blastomeres into the fallopian tube
A cross-section at the midpoint of the middle piece of a human sperm will show :
1. | centriole, mitochondria, and 9+2 arrangement of microtubules |
2. | centriole and mitochondria |
3. | mitochondria and 9+2 arrangement of microtubules |
4. | 9+2 arrangement of microtubules only |
Which one of the following is a matching pair?
1. Lubb-sharp closure of AV valves at the beginning of ventricular systole
2. Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole
3. Pulsation of the radial artery-valves in the blood vessels
4. Initiation of the heart beat - Purkinje fibers
In a normal pregnant woman, total gonadotropin activity was assessed. The expected result was :
1. | High level of circulating FSH and LH in the uterus to stimulate implantation of the embryo |
2. | High level of circulating HCG to stimulate endometrial thickening |
3. | High levels of FSH and LH in the uterus to stimulate endometrial thickening |
4. | High level of circulating HCG to stimulate oestrogen and progesterone synthesis |
Which of the following teeth are lophodont?
1. Incisor and canine
2. Canine and premolar
3. Premolar and molar
4. Premolar and incisor
Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that
1. nerve fibre is insulated by a medullary sheath
2. sodium pump starts operating only at the cyton and then continues into the nerve fibre
3. neurotransmitters are released by dendrites and not by axon endings
4. neurotransmitters are released by the axon endings and not by dendrites.
Refer the given figure of nephron.
Identify A, B, C, and D and select the correct option regarding them.
|
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
1. there is a negative pressure in the lungs
2. there is a negative intrapleural pressure pulling at the lung walls
3. there is a positive intrapleural pressure
4. pressure in the lungs is higher than the atmospheric pressure
Which one of the following four glands is correctly matched with the accompanying description?
1. Thyroid - hyperactivity in young children causes cretinism
2. Thymus - starts undergoing atrophy after puberty
3. Parathyroid - secrets parathormone which promotes movement of calcium ions from blood into bones during calcification
4. Pancreas - Delta cells of the Islets of Langerhans secrete a hormone which stimulates glycolysis
From the following, identify the correct combination of salient features of Genetic Code
1. Universal, Non-ambiguous,Overlapping
2. Degenerate, Overlapping, Commaless
3. Universal, Ambiguous, Degenerate
4. Degenerate, Non-overlapping, Non ambiguous
Between which among the following, the relationship is not an example of commensalism?
1. | Orchid and the tree on which it grows |
2. | Cattle Egret and grazing cattle |
3. | Sea Anemone and Clown fish |
4. | Female wasp and fig species |
In Recombinant DNA technology antibiotics are used :
(1) to keep medium bacteria-free
(2) to detect alien DNA
(3) to impart disease-resistance to the host plant
(4) as selectable markers
Which of the following is incorrect for wind-pollinated plants?
(1) Well exposed stamens and stigma
(2) Many ovules in each ovary
(3) Flowers are small and not brightly colored
(4) Pollen grains are light and non-sticky