All the following regarding red muscle fibers are true except:
1. They are adapted for slow and sustained activity
2. They have a high content of myoglobin
3. They are rich in mitochondria
4. They depend on anaerobic process for energy
The micturition reflex is coordinated at the level of:
1. Sacral spinal cord
2. Pontine micturition center
3. Hypothalamus
4. Cerebrum
All the following lead to a right shift of oxy-hemoglobin dissociation curve except:
1. Increase in pH
2. Increase in temperature
3. Increase in partial pressure of carbon dioxide
4. Presence of 2,3-DPG
Another name for lymph would be:
1. Extra-cellular fluid | 2. Tissue fluid |
3. Plasma ultrafiltrate | 4. Serous fluid |
The resting axonal membrane is impermeable/nearly impermeable to:
I. Sodium ions
II. Potassium ions
III. Negatively charged proteins
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
Gustatory receptors are meant for:
1. Taste | 2. Smell |
3. Vibration | 4. Temperature |
Which of the following is not true about “Saheli”?
1. | It is an oral contraceptive pill |
2. | The basic preparation is steroidal |
3. | It is a ‘once in a week’ pill |
4. | It has very few side effects and has a high contraceptive value |
At the birth of the female child, the follicles in her ovaries contain:
1. | Primary oocytes that have been arrested at the S phase of the cell cycle |
2. | Primary oocytes that have been arrested at prophase I of meiosis I |
3. | Secondary oocytes that have been arrested prophase I of meiosis I |
4. | Secondary oocytes that have been arrested at metaphase II of meiosis II |
The correct sequence of mammalian mammary gland ducts beginning from the alveoli would be:
1. | Mammary tubules → Mammary ducts → Mammary ampulla → Lactiferous ducts |
2. | Lactiferous ducts → Mammary ducts → Mammary ampulla → Mammary tubules |
3. | Lactiferous ducts → Mammary ampulla → Mammary ducts → Mammary tubules |
4. | Mammary tubules → Mammary ampulla → Mammary ducts → Lactiferous ducts |
Marasmus is not characterized by:
1. onset age less than one year
2. simultaneous deficiency of proteins and calories
3. impairment of mental faculties
4. extensive edema and swelling of body parts
Which of the following cannot be regarded as a main function of cortisol?
1. Increased blood sugar by gluconeogenesis
2. Lipolysis, proteolysis and decreased uptake of amino acids by body cells
3. Regulation of water and minerals in the body
4. Suppression of inflammation and immunity
Identify the human cell for which the interphase period lasts the entire life of a person.
1. | Hepatocyte | 2. | Bone marrow stem cells |
3. | Epidermal cell | 4. | Neuron |
Which of the following is an essential amino acid?
1. Phenylalanine
2. Aspartic acid
3. Glutamic acid
4. Serine
When compared to external fertilization, in cases where internal fertilization takes place in sexually reproducing organisms:
1. | The progeny are afforded better protection |
2. | The number of male gametes are highly reduced while the number of female gametes is increased |
3. | Male gamete is non-motile and the female gamete has to reach it |
4. | In seed plants the non-motile male gametes are carried to the female gamete by pollen tubes |
I. | Only I and II are correct |
II. | Only III and IV are correct |
III. | Only I and IV are correct |
IV. | Only II and III are correct |
A source of a ‘clot buster’ enzyme used in patients of CAD is the bacterium:
1. | Staphylococcus aureus | 2. | Streptomyces griseus |
3. | Pseudomonas putida | 4. | Streptococcus pyogenes |
Which of the following is not a finding observed by Darwin, when he landed on the Galapagos Islands?
1. | Woodpeckers were absent on the islands |
2. | The island species resembled the mainland species |
3. | Islands contain more different species of finches than the mainland |
4. | The corresponding size of the species was smaller on the islands than the species on the mainland |
If you visit Africa you will find an amazing variety of species of living organisms. But you will also notice that different parts of the continents have different biodiversity. This is because the different areas of Africa will have different:
1. | evolutionary mechanisms | 2. | ancestors |
3. | environments | 4. | evolutionary times |
pBR322 does not contain the site for:
1. | Pvu I | 2. | BamH I |
3. | Sma I | 4. | EcoR I |
Identify the incorrect statement:
1. | The DNA of the bacteriophage ϕ X 174 has 5386 nucleotides. |
2. | Bacteriophage lambda DNA has 48502 base pairs. |
3. | The DNA of Escherichia coli has 4.6 X 103 base pairs. |
4. | Haploid content of human DNA is 3.3 X 109 base pairs. |
Insect resistance in host crop plants may be due to morphological, biochemical, or physiological characteristics. Identify the correct statements:
I: | Hairy leaves in several plants are associated with resistance to jassids in cotton and cereal leaf beetle in wheat. |
II: | In wheat, solid stems lead to non-preference by the stem sawfly and smooth-leaved and nectar-less cotton varieties do not attract bollworms. |
III. | High aspartic acid, low nitrogen and sugar content in maize lead to resistance to maize stem borers. |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
Which of the following is/are a marine plant pollinated by water?
1. | Vallisneria | 2. | Hydrilla |
3. | Zostera | 4. | Both 1 and 2 |
Secondary lymphoid organs:
1. | Are those where immature lymphocytes differentiate |
2. | Provide a site of interaction between lymphocytes and antigens |
3. | Are formed after birth |
4. | Are bone marrow and MALT |
During DNA packaging in eukaryotic cells, Non-Histone Chromosomal proteins:
1. | Are not required |
2. | Are required from the beginning to the end of the packaging |
3. | Are required only for earlier stages of packaging |
4. | Are required for a higher level of packaging |
What can the possible blood groups of progeny whose father and mother are of A and B blood groups, respectively?
1. | A and B only | 2. | AB only |
3. | All except O | 4. | A, B, AB, and O |
Genes that code for a pair of contrasting traits or slightly different forms of the same gene are known as:
1. | Alleles | 2. | Loci |
3. | Cistrons | 4. | Introns |
While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant?
1. Bagging of the female flower
2. Dusting of pollen on the stigma
3. Emasculation
4. Collection of pollen
In RNAi, genes are silenced using:
1. | ss DNA | 2. | ds DNA |
3. | ds RNA | 4. | ss RNA |
ICBN stands for:
1. Indian Council for Biological Nomenclature
2. International Code for Binomial Nomenclature
3. Indian Council for Binomial Nomenclature
4. International Code for Botanical Nomenclature
Red algae photosynthesize at ocean depths greater than any other group of algae and hence can be found in deepest waters because they
1. contain a higher concentration of chlorophyll
2. have an extremely large surface area to capture the little amount of light that reaches them
3. contain the pigment phycoerythrin
4. periodically float to the surface and intercept light, then move back to the ocean floor
The commercial production of citric acid is possible with the help of:
1. Xanthomanascitri
2. Claviceps purpura
3. Trichodermaharzianum
4. Aspergillus niger
A fungus used extensively in biochemical and genetic work is:
1. | Neurospora | 2. | Trichoderma |
3. | Paecilomyces | 4. | Streptomyces |
The ring arrangement of vascular bundles is a characteristic feature of:
1. | Monocot stem | 2. | Dicot stem |
3. | Monocot root | 4. | Dicot root |
Pneumatophores are found in plants growing in:
1. Xeric conditions | 2. Swampy areas |
3. Hypersaline environments | 4. Permafrost conditions |
A lateral branch with short internodes and each node bearing a rosette of leaves and tufts of roots is found in:
1. Opuntia and Euphorbia | 2. Mint and Jasmine |
3. Pistia and Eichhornia | 4. Banana and Pineapple |
Match the followings and choose the correct answer:
Column I | Column II | ||
(a) | Hermaphrodite | (i) | Produces blood cells and haemoglobin |
(b) | Directed development | (ii) | Testis and ovary in the same animal |
(c) | Chemoreceptor | (iii) | Larval form absent |
(d) | Blood gland in earthworm | (iv) | Sense of chemical substances |
Options:
Options: | (a) | (b) | (c) | (d) |
1. | (ii) | (iii) | (iv) | (i) |
2. | (iii) | (ii) | (iv) | (i) |
3. | (i) | (iii) | (ii) | (iv) |
4. | (ii) | (iv) | (iii) | (i) |
Birds and mammals share one of the following characteristics as a common feature.
1. Pigmented skin
2. Alimentary canal with some modification
3. Viviparity
4. Warm blooded nature
In some Bilateria, the body is of many segments that show serial repetition of parts. Such segments are called as:
1. Myotomes
2. Metameres
3. Proglottides
4. Comb plates
Which of the following is not true of a eukaryotic cell?
1. It has 80S type of ribosome present in the mitochondria
2. It has 80S type of ribosome present in the cytoplasm
3. Mitochondria contain circular DNA
4. Membrane bound organelles are present
Which of the following commits the industrialised nations to reduce greenhouse gas emissions?
1. Montreal protocol
2. Kyoto protocol
3. UNECD earth summit
4. Alma Atta conference
Which of the following is implicated in the causation of skin cancers and snow-blindness cataracts in humans?
1. | UV – A | 2. | UV - B |
3. | UV - C | 4. | None of the above |
Khecheopalri lake in Sikkim is a:
1. Biosphere reserve
2. National park
3. Sacred lake
4. Inhibited area
Regarding phosphorus cycle:
I: | There is no respiratory release of phosphorus into atmosphere |
II: | Atmospheric inputs of phosphorus through rainfall of phosphorus is small |
1. Only I is true.
2. Only II is true.
3. Both I and II are true.
4. Both I and II are false.
Stratification of an ecosystem means:
1. | Vertical distribution of different species occupying different levels |
2. | Vertical distribution of different species occupying the same levels |
3. | Horizontal distribution of different species occupying different levels |
4. | Horizontal distribution of different species occupying the same levels |
In mycorrhiza, the fungi help the plant in:
1. Synthesis of high energy carbohydrates
2. Absorption of essential nutrients from the soil
3. Nitrogen fixation
4. Biocontrol of pathogens
How many ATP molecules are directly synthesized in glycolytic pathway from one glucose molecule?
1. 2 | 2. 4 |
3. 6 | 4. 10 |
What is true regarding PSI and PSII?
1. PS I works before PS II during the light reaction
2. A single chlorophyll a molecule makes the reaction center in both PS I and PS II
3. The reaction center of PS I is P680 and in PS II is P700
4. LHC is seen in PS I but not in PS II
Consider the following:
I. Creation of pull for absorption and transport in plants
II. Supply of water for photosynthesis
III. Transport of minerals from leaves to all parts of a plant
IV. Cooling of leaf surface
V. Maintenance of shape and structure of plants by keeping the cells turgid
Functions of transpiration include:
1. All
2. All but III
3. All but V
4. All but III and IV
Uricotelism is found in
1. Fishes, and fresh protozoans.
2. Birds, reptiles and insects
3. Frogs, and toads
4. Mammals, and birds
In the human body, which one of the following is anatomically correct?
1. Cranial nerve - 10 pairs
2. Floating ribs - 2 pairs
3. Collar bones - 3 pairs
4. Salivary glands - 1 pair
One of the example of the action of the autonomous nervous system is
1. Knee-jerk response.
2. Pupillary reflex.
3. Peristalsis of the intestines.
4. Swallowing of food.
Which type of white blood cells are concerned with the release of histamine and the natural anticoagulant heparin?
1. Monocytes
2. Neutrophils
3. Basophils
4. Eosinophils
Which one of the following is not a second messenger in hormone action?
1. cGMP
2. Calcium
3. Sodium
4. cAMP
In recent years, DNA sequences (nucleotide sequence) of mtDNA and Y chromosomes were considered for the study of human evolution, because
1. they are small, and therefore, easy to study
2. they are uniparental in origin and do not take part in recombination
3. their structure is known in greater detail.
4. they can be studied from the samples of fossil remains.
Satellite DNA is important because it:
1. | shows a high degree of polymorphism in the population and also the same degree of polymorphism in an individual, which is heritable from parents to children |
2. | does not code for proteins and is the same in all members of the population |
3. | codes for enzymes needed for DNA replication |
4. | codes for proteins needed in the cell cycle |
What does lac refer to in lac operon
1. Lactase
2. 1,00,000
3. Lac insect
4. Lactose
Which one of the following may require pollinators, but is genetically similar to autogamy?
1. Xenogamy
2. Apogamy
3. Cleistogamy
4. Geitonogamy
Endosperm is consumed by developing embryo in the seed of
1. Coconut
2. Pea
3. Maize
4. Castor
The introduction of t-DNA into plants involves:
1. Altering the pH of the soil, then heat shocking the plants
2. Exposing the plants to cold for a brief period
3. Allowing the plant roots to stand in water
4. Infection of the plant by Agrobacterium tumefaciens
A man whose father was colour blind marries a woman who had a colourblind mother and a normal father. What percentage of male children of this couple will be colour blind?
1. | 25% | 2. | 0% |
3. | 50% | 4. | 75% |
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
Wild varieties of plants must be conserved to
1. Maintain ecosystem
2. Feeding wild animals
3. Future evolution
4. Incorporate useful traits in future crop varieties
Which stages of cell division do the following figures A and B represent respectively?
1. Metaphase - Telophase
2. Telophase - Metaphase
3. Late anaphase – Prophase
4. Prophase – Anaphase
Examine the figure given below and select the right option giving all the four parts (a, b, c and d) correctly identified.
(a) | (b) | (c) | (d) | |
1. | Archegoniophore | Female thallus | Gemma cup | Rhizoids |
2. | Archegoniophore | Female thallus | Bud | Foot |
3. | Seta | Sporophyte | Protonema | Rhizoids |
4. | Antheridiophore | Male thallus | Globule | Roots |
Which one of the following matches is correct?
1. | Alternaria | Sexual reproduction absent | Deuteromycetes |
2. | Mucor | Reproduction by Conjugation | Ascomycetes |
3. | Agaricus | Parasitic fungus | Basidiomycetes |
4. | Phytophthora | Aseptate mycelium | Basidiomycetes |
Placenta and pericarp are both edible portions in
1. Apple
2. Banana
3. Tomato
4. Potato
Tracheids differ from the tracheary elements in
1. Having casparian strips
2. Being imperforate
3. Lacking nucleus
4. Being lignified
Which one of the following mammalian cells are not capable of metabolizing (aerobically) glucose to carbon dioxide?
1. White blood cells | 2. Unstriated muscle cells |
3. Liver cells | 4. Red blood cells |
Select the Taxon mentioned that represents both marine and fresh water species–
1. Echionoderms
2. Ctenophroa
3. Cephalocoradata
4.Cnidaria
Chromatophores take part in :
1. Growth
2. Movement
3. Respiration
4. Photosynthesis
Which one of the following is not applicable to RNA?
1. 5’ phosphoryl and 3’ hydroxyl ends
2. Heterocyclic nitrogenous bases
3. Chargaff’s rule
4. Complementary base pairing
A scrubber in the exhaust of a chemical industrial plant removes:
1. Gases like sulphur dioxide
2. Particulate matter of the size 5 micrometer or above
3. Gases like ozone and methane
4. Particulate matter of the size 2.5 micrometer or less
Eutrophication is often seen in
1. Deserts
2. Fresh water lakes
3. Ocean
4. Mountains
Which of the following is the most important cause of animals and plants being driven to extinction?
1. Co - extinctions
2. Over - exploitation
3. Alien species invasion
4. Habitat loss and fragmentation
Secondary Succession takes place on/in :
1. Degraded forest
2. Newly created pond
3. Newly cooled lava
4. Bare rock
A biologist studied the population of rats in a barn. He found that the average natality was 250, average
mortality 240, immigration 20, and emigration 30. The net increase in population is:
1. | 10 | 2. | 15 |
3. | 5 | 4. | zero |
The maximum growth rate occurs in
1. Senescent phase.
2. Lag phase.
3. Exponential phase.
4. Stationary phase.
Which one of the following growth regulators is known as "stress hormone" ?
1. Abscisic acid
2. Ethylene
3.
4. lndole acetic acid
In which one of the following processes is not released?
1. Aerobic respiration in plants
2. Aerobic respiration in animals
3. Alcoholic fermentation
4. Lactate fermentation
-plants are photosynthetically more efficient than -plants because
1. compensation point is more.
2. generated during photorespiration is trapped and recycled through PEP carboxylase.
3. efflux is not prevented.
4. they have more chloroplasts.
In which of the following, all three are macronutrients?
1. Iron, copper, molybdenum
2. Molybdenum, magnesium, manganese
3. Nitrogen, magnesium, phosphorus
4. Boron, zinc, manganese
In vitro fertilization is a technique that involves transfer of which one of the following into the fallopian tube?
1. Embryo only, up to 8 cell stage
2. Either zygote or early embryo upto 8 cell stage
3. Embryo of 32 cell stage
4. Zygote only
The 'cells of Rauber' are
1. secretory cells of endometrium in uterus
2. inner cell mass of blastocoel
3. outer cells of trophoblast in contact with uterine wall
4. cells of trophoblast, in contact with inner cell mass of blastocyst.
Root pressure develops due to
1. active absorption
2. low osmotic potential in soil
3. passive absorption
4. increase in transpiration
Gastric juice of infants contains?
1. maltase, pepsinogen, rennin
2. nuclease, pepsinogen, lipase
3. pepsinogen, lipase, rennin
4. amylase, rennin, pepsinogen
A large proportion of oxygen is left unsused in the human blood even after its uptake by the body tissues. This
1. raises the of blood to 75 mm of Hg
2. is enough to keep oxyhaemoglobin
3. helps in releasing more to the epithelial tissues
4. acts as a reserve during muscular exercise
Hypersecretion of growth hormone in adults does not cause further increase in height because
1. growth hormone becomes inactive in adults
2. epiphyseal plates close after adolescence
3. bones loose their sensitivity to growth hormone in adults
4. muscle fibres do not grow in size after birth
The specific palindromic sequence which is recognized by EcoRI is :
1. 5' -GGAACC-3'
3'-CCTTGG-5'
2. 5'-CTTAAG-3'
3'-GAATTC-5'
3. 5'-GGATCC-3'
3'-CCTAGG-5'
4. 5'-GAATTC-3'
3'-CTTAAG-5'
Which of the following is put into Anaerobic sludge digester for further sewage treatment ?
(1) Floating debris
(2) Effluents of primary treatmet
(3) Activated sludge
(4) Primary sludge
Which of the following hormone levels will cause release of ovum (ovulation) from the graffian follicle?
1. High concentration of Progesterone
2. Low concentration of LH
3. Low concentration of FSH
4. High concentration of Estrogen
The yellowish fluid "colostrum" secreted by mammary glands of the mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant. This type of immunity is called as :
(1) Passive immunity
(2) Active immunity
(3) Acquired immunity
(4) Autoimmunity