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
In the mycorrhizal symbiotic relationship, the root provides the fungus with:
1. Water | 2. Phosphorus |
3. N – containing compounds | 4. Sodium and potassium |
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
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 a chloroplast the highest number of protons are found in
1. | lumen of thylakoids | 2. | inter membrane space |
3. | antenna complex | 4. | stroma |
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
Fruit and leaf drop at early stages can be prevented by the application of
1. | cytokinins | 2. | ethylene |
3. | auxins | 4. | gibberellic acid |
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
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 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 |
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 |
Which one of these is not a eukaryote?
1. Euglena
2. Anabaena
3. Spirogyra
4. Agaricus
Besides paddy fields, cyanobacteria are also found inside vegetative part of :
1. Cycas
2. Equisetum
3. Psilotum
4. Pinus
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 |
Stem tendrils are present in all the following except:
1. Citrus | 2. Watermelon |
3. Cucumber | 4. Grapevines |
An asymmetric flower is seen in:
1. Mustard
2. Pea
3. Cassia
4. Canna
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 |
The enzyme recombinase functions during:
1. | Zygotene | 2. | Pachytene |
3. | Diplotene | 4. | Diakinesis |
Which stage of meiosis is shown in the diagram given below?
1. | Metaphase I | 2. | Metaphase II |
3. | Anaphase I | 4. | Anaphase II |
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 |
Which of the following is not seen in red algae?
1. | 2 unequal flagella | 2. | Cellulose cell wall |
3. | Phycoerythrin | 4. | Floridean starch |
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
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.
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 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
Male gametophyte with the least number of cells is present in:
1. | Pteris | 2. | Funaria |
3. | Lilium | 4. | Pinus |
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
In Phenylketonuria,
I. | Phenylpyruvic acid and other derivatives are accumulated in the brain resulting in mental retardation. |
II. | These are also excreted through urine because of their poor absorption by the kidney. |
1. | Only I is correct | 2. | Only II is correct |
3. | Both are correct | 4. | Both are incorrect |
Sickle cell anaemia results from:
1. A chromosomal aberration
2. Non-disjunction of autosome
3. A point mutation
4. Blood transfusion reaction
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 |
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. |
A typical angiosperm anther is:
1. Bilobed and polythecous
2. Unilobed and monothecous
3. Multilobed and monothecous
4. Bilobed and dithecous
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 |
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. |
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
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
A species facing extremely high risk of extinction in the immediate future is called:
1. Vulnerable
2. Endemic
3. Critically Endangered
4. Extinct
World summit on Sustainable Development (2002) was held in
1. Argentina
2. Brazil
3. South Africa
4. Sweden
The intensity of noise beyond which physical discomfort is:
1. 70 dB
2. 80 dB
3. 100 dB
4. 120 dB
Which of the following statement regarding mitochondrial membrane is not correct?
1. Outer membrane resembles a sieve
2. Outer membrane is permeable to all kinds of molecules
3. Enzymes of electron transport chain are embedded in outer membrane
4. Inner membrane is highly convoluted, forming a series of infoldings
When the centromere in a chromosome is located close to its end, the chromosome is called as:
1. | Metacentric | 2. | Sub-metacentric |
3. | Acrocentric | 4. | Telocentric |
Among the terms listed below, those that are not technically correct names for a floral whorl are:
i. | Androecium | ii. | Carpel |
iii. | Corolla | iv. | Sepal |
1. | i and iv | 2. | iii and iv |
3. | ii and iv | 4. | i and ii |
Phenotype of an organism is the result to
1. Mutations and linkages
2. Genotype and environment interactions
3. Cytoplasmic effects and nutrition
4. Environmental changes and sexual dimorphism.
In which pair both the plants can be vegetatively propagated by leaf segments?
1. | Agave and Kalanchoe |
2. | Bryophyllum and Kalanchoe |
3. | Asparagus and Bryophyllum |
4. | Chrysanthemum and Agave |
The daughter DNA that was extracted from the culture one generation after the transfer from 15N to 14N medium had:
1. | Low density |
2. | Intermediate density |
3. | High density |
4. | One had low and another had high density |
Nucleosomes constitute the repeating subunits of a structure in the nucleus called:
1. | Nucleoid | 2. | Chromatid |
3. | Solenoid | 4. | Chromatin |
Hidden hunger is accurately described as:
1. protein undernutrition
2. calorie undernutrition
3. vitamins and minerals undernutrition
4. PEM
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
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 |
Chromosomal theory of inheritance was proposed by:
1. | Sutton and Boveri |
2. | Bateson and Punnet |
3. | T. H. Morgan |
4. | Watson and Crick |
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
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
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 correctly explains the function of a specific part of a human nephron?
1. Henle's loop - most reabsorption of the major substances from the glomerular filtrate
2. Distal convoluted tubule - reabsorption of ions into the surrounding blood capillaries
3. Afferent arteriole - carries the blood away from the glomerulus towards the renal vein
4. Podocytes- create minute spaces (slit pores) for the filtration of blood into the Bowman's capsule
Refer the given figure of nephron.
Identify A, B, C, and D and select the correct option regarding them.
|
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.
Which of the following teeth are lophodont?
1. Incisor and canine
2. Canine and premolar
3. Premolar and molar
4. Premolar and incisor
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 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
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
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
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
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
Approximately what percentage of existing animal species are invertebrates?
1. | 20% | 2. | 50% |
3. | 70% | 4. | 95% |
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
To which one of the following categories does adipose tissue belong?
1. Epithelial | 2. Connective |
3. Muscular | 4. Neural |
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 |
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 |
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
An analysis of chromosomal DNA using the Southern hybridization technique does not use:
1. Electrophoresis
2. Blotting
3. Autoradiography
4. PCR
Which of the following is a recombinant vaccine?
1. | BCG | 2. | OPV |
3. | Hepatitis B | 4. | MMR |
Chemically, hormones are
1. Proteins, steroids and biogenic amines.
2. Proteins only.
3. Steroids only.
4. Biogenic amines only.
An enzyme brings about :
1. Decrease in reaction time
2. Increase in reaction time
3. Increase in activation energy
4. Reduction in activation energy
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
The specific role of bile pigments with respect to fat utilization is:
1. Emulsification
2. Micelle formation
3. Enterohepatic circulation
4. Nothing
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 |
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.
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 |
Oral contraceptive pills do not:
1. Inhibit ovulation
2. Prevent implantation
3. Alter cervical mucus
4. Kill sperms
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 |
To begin the blood clot formation cascade, the enzyme complex required is:
1. | Thromboxane A2 | 2. | Thrombin |
3. | Thrombokinase | 4. | Heparin |
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
The urine examination of a healthy person should not show the presence of:
1. | nitrogenous waste | 2. | chloride |
3. | protein | 4. | sodium |
Which of the following is a sesamoid bone?
1. Sternum
2. Clavicle
3. Patella
4. Navicular
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
Name the ion responsible for the unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
1. | Calcium | 2. | Magnesium |
3. | Sodium | 4. | Potassium |
Which of the following is not a function of the skeletal system?
1. Production of erythrocytes
2. Storage of minerals
3. Production of body heat
4. Locomotion
Arteries are best defined as the vessels which
1. carry blood away from the heart to different organs
2. break up into capillaries which reunite to form a vein
3. carry blood from one visceral organ to another visceral organ
4. supply oxygenated blood to the different organs
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 |
Skeletal muscles appear striated due to presence of two characteristic proteins in alternating dark and light bands. Which of the following is a correct match of the protein with its light refractive property and colour?
Protein | Colour | Property | |
1. | Myosin | Light | Anisotropic |
2. | Actin | Dark | Anisotropic |
3. | Myosin | Dark | Isotropic |
4. | Actin | Light | Isotropic |
A danger of genetic engineering is that the genetically modified bacterium can escape the lab and infect humans. This possibility is prevented by:
1. | selecting a mutant form of the bacteria |
2. | selecting a live attenuated bacterium |
3. | application of stringent asepsis in the lab |
4. | prophylactically immunizing the persons working in the lab |
Proteins perform many physiological functions. For example, some functions as enzymes. One of the following represents an additional function that some proteins discharge.
1. Antibiotics
2. Pigment conferring colour to skin
3. Pigment making colours of flowers
4. Hormones
Antivenom against snake poison contains:
1. | Antigens | 2. | Antigen-antibody complexes |
3. | Antibodies | 4. | Enzymes |
The chances of contracting bird flu from a properly cooked (above 100°C) chicken and egg are:
1. | very high | 2. | high |
3. | moderate | 4. | negligible |
Convergent evolution is illustrated by
1. rat and dog.
2. bacterium and protozoan
3. starfish and cuttlefish
4. dogfish and whale
In the human population the frequency of which of the following will always be more than what is apparent?
1. | somatic mutations | 2. | dominant alleles |
3. | recessive alleles | 4. | females |
The dinosaurs suddenly disappeared about:
1. 50 mya
2. 65 mya
3. 75 mya
4. 90 mya
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
Match the items given in Column I with those in Column II and select the correct option given below:
Column I | Column II | ||
(a) | Proliferative Phase | (i) | Breakdown of the endometrial lining |
(b) | Secretory Phase | (ii) | Follicular Phase |
(c) | Menstruation | (iii) | Luteal Phase |
(a) | (b) | (c) | |
1. | (ii) | (iii) | (i) |
2. | (i) | (iii) | (ii) |
3. | (iii) | (ii) | (i) |
4. | (iii) | (i) | (ii) |
Which of the following is not represented on an ECG of a healthy individual?
1. | Ventricular depolarization | 2. | Ventricular repolarization |
3. | Atrial depolarization | 4. | Atrial repolarization |