The translocation of organic solutes in sieve tube members is supported by:
1. root pressure and transpiration pull
2. P-proteins
3. mass flow involving a carrier and ATP
4. cytoplasmic streaming
Phloem sap is mainly:
1. Glucose and Water
2. Hormones and Amino acids
3. Water and Sucrose
4. Amino acids and water
An organism used as a biofertilizer for raising soyabean crop is
1. Azospirillum
2. Rhizobium
3. Nostoc
4. Azotobacter
The first step for initiation of photosynthesis will be
1. Photolysis of water
2. Excitement of chlorophyll molecule due to absorption of light
3. ATP formation
4. Glucose formation
NCERT textbook mentions that “immediately after light becomes unavailable, the biosynthetic process continues for some time and then stops”. Why does it stop after some time?
1. The respiration stops in the absence of light and hence synthesis of sugars stops
2. The reactions of the biosynthetic phase are directly dependent on light
3. The reactions of the biosynthetic phase are dependent on the products of light reaction
4. This is a mistake in NCERT as Dark Reactions will continue throughout night
Which one of the following mammalian cells are not capable of metabolising glucose to carbon dioxide aerobically?
1. | White blood cells | 2. | Unstriated muscle cells |
3. | Liver cells | 4. | Red blood cells |
At how many points in the TCA cycle is reduced to NADH + ?
1. | 2 | 2. | 3 |
3. | 4 | 4. | 6 |
Importance of day length in flowering of plants was first shown in
1. Lemna
2. tobacco
3. cotton
4. Petunia
In animals, the organism, if unable to migrate, might avoid the stress by escaping in time. All the following would exemplify this except:
1. | Hibernation | 2. | Aestivation |
3. | Diapause | 4. | Migration |
Where among the following will you find pitcher plants?
1. | Rain forest of North-East India | 2. | Sunderbans |
3. | Thar desert | 4. | Western ghats |
Biosphere is:
1. | A component in the ecosystem |
2. | Composed of the plants present in the soil |
3. | Life in the outer space |
4. | Composed of all living organisms present on earth which interact with the physical environment |
A cell organelle containing hydrolytic enzymes is
1. | mesosome | 2. | lysosome |
3. | microsome | 4. | ribosome |
The imperfect fungi which are decomposer of litter and help in mineral cycling belong to:
1. | Basidiomycetes | 2. | Phycomycetes |
3. | Ascomycetes | 4. | Deuteromycetes |
In S phase of the cell cycle
1. Amount of DNA doubles in each cell
2. Amount of DNA remains same in each cell
3. Chromosome number increases
4. Amount of DNA is reduced to half in each cell
Stamens attached to the perianth as in the flowers of lily are called as:
1. | Epipetalous | 2. | Epiphyllous |
3. | Polypetalous | 4. | Gamopetalous |
Tepal six [3+3], epipetpalous stamens and tricarpellarysyncarpous superior ovary is seen in:
1. Liliaceae
2. Fabaceae
3. Solanaceae
4. Brassicaceae
Root hairs are:
1. unicellular extensions of subsidiary cells
2. unicellular elongations of epidermal cells
3. unicellular elongations of ground tissue cells
4. appendages of the cuticle
Which of the following is not a feature of diakinesis stage of prophase I of meiosis I?
1. Terminalization of chiasmata
2. Meiotic spindle assembling to prepare separation of homologues
3. Decondensation of the chromatin
4. NEBD and disappearance of nucleolus
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 |
Entamoeba |
a |
Flagellated protozoan |
B |
Trypanosoma |
b |
Amoeboid protozoan |
C |
Paramecium |
c |
Non motile protozoan |
D |
Plasmodium |
d |
Ciliated protozoan |
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 |
Identify the incorrect statement regarding red algae:
1. Major pigments are chlorophyll a, c and phycocyanin
2. Stored food is floridean starch
3. Cellulosic cell wall with pectin and polysulfate esters
4. Absent flagellar insertions
Identify the correct chronological order of the taxonomic hierarchy from lowest to highest:
1. Family – Order – Class – Phylum
2. Family – Class – Order – Phylum
3. Order – Family – Class – Phylum
4. Order – Class – Phylum – Family
Which is the most common mechanism of genetic variation in the population of a sexually-reproducing organism?
1. Chromosomal aberrations
2. Genetic drift
3. Recombination
4. Transduction
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
1. Geitonogamy
2. Karyogamy
3. Autogamy
4. Xenogamy
On which organism Beadle and Tatum worked to propose one gene-one enzyme hypothesis
1. Drosophila
2. Escherichia coli
3. Neurospora crassa
4. Nostoc
DNA- dependent RNA polymerase catalyzes transcription on the strand of the DNA which is called the
1. Antistrand
2. Template strand
3. Coding strand
4. Alpha strand
A plant with the genotype Tt should be called:
1. | Heterologous | 2. | Hemizygous |
3. | Heterozygous | 4. | Dihybrid |
Which of the following anticodons will hybridize with the mRNA codon 5’ – AUG – 3’?
1. | 5’ – UAC – 3’ | 2. | 5’ – TAC – 3’ |
3. | 3’ – UAC – 5’ | 4. | 3’ – TAC – 5’ |
Tapetum :
I. | Is a layer of nutritive cells that are found within the microsporangium. |
II. | The cells are usually bigger and normally have more than one nucleus per cell because mitosis is not normal in them. |
III. | Helps in pollen wall formation, transportation of nutrients to the inner side of the anther, synthesis of callose enzyme for separation of microspore tetrads. |
Of the above statements, the correct ones are:
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
Match the structure in COLUMN I with the description in COLUMN II and choose your answer from the codes given below:
Column I | Column II | ||
A. | Stigma | a. | Landing platform for pollen grains |
B. | Ovary | b. | Basal bulged part of the pistil |
C. | Placenta | c. | Part of the ovary where funiculus attaches |
D. | Ovule | d. | Megasporangium |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | a | c | b | d |
3. | b | a | d | c |
4. | d | c | b | a |
If a father and son are both affected by red-green colour blindness, then what can be said definitely?
I. | The son has received the trait from the father. |
II. | The mother of the affected son has to be affected by red-green colour blindness. |
III. | Any sister of the affected son can never be affected by red-green colour blindness. |
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | None |
A molecule that can act as a genetic material must fulfill all the following criteria except:
1. It should be able to generate its replica.
2. It should chemically and structurally be stable.
3. It should be able to express itself in the form of Medelian characters.
4. It should provide scope for rapid changes required for evolution.
The ‘Roquefort cheese’ is ripened by:
1. | A fungus | 2. | A bacterium |
3. | An algae | 4. | Lichens |
Which of the following statements is NOT true of mitosis?
1. A single nucleus gives rise to two identical daughter nuclei.
2. The daughter nuclei are genetically identical to the parent nucleus.
3. The centromeres divide at the onset of anaphase.
4. Homologous chromosomes synapse in prophase.
The triple helix structure of collagen was discovered by:
1. G. N. Ramachandran
2. Y. S. Subbarao
3. C. V. Raman
4. S. Chandrashekhar
Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilizers ?
1. Aspergillus and Rhizopus
2. Rhizobium and Rhizopus
3. Cyanobacteria and Rhizobium
4. Aspergillus and Cyanobacteria
Niche overlap indicates
1. active cooperation between two species.
2. two different parasites on the same host.
3. sharing resources between two species
4. mutualism between two species.
Productivity is the rate of production of biomass expressed in terms of :
i.
ii.
iii.
iv.
1. | ii | 2. | iii |
3. | ii and iv | 4. | i and iii |
Which of the following exhibits biomagnifications?
1. | SO2 | 2. | Mercury |
3. | DDT | 4. | Both 2 & 3 |
The plasma membrane consists mainly of
1. Proteins embedded in a phospholipid bilayer
2. Proteins embedded in a polymer of glucose molecules
3. Proteins embedded in a carbohydrate bilayer
4. Phospholipids embedded in a protein bilayer
The phase of the cell cycle during which DNA replication takes place is:
1. G1 phase | 2. S phase |
3. G2 phase | 4. M phase |
A polyestrous animal is
1. Man
2. Cat
3. Rabbit
4. Horse
A human male produces diallelic sperms in equal proportion AB, Ab, aB, and ab. The genotype of the person would be:
1. | Aa Bb | 2. | Aa BB |
3. | AA Bb | 4. | AA BB. |
Which one of the following fruits is parthenocarpic?
1. Apple
2. Jackfruit
3. Banana
4. Brinjal
What is added to the 5’ end of hnRNA in Eukaryotes?
1. | Poly A tail |
2. | Methyl cytosine triphosphate |
3. | Methyl guanosine triphosphate |
4. | Poly U tail |
The DNA dependent polymerases catalyze:
1. | Only in 3’ – 5’ direction |
2. | Only in 5’ – 3’ direction |
3. | In both directions |
4. | In neither directions |
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 |
In a marriage between a male with blood group A and a female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of parents?
1. | IA i (Male) ; IB IB (Female) |
2. | IA IA (Male) ; IB IB (Female) |
3. | IA IA (Male) ; IB i (Female) |
4. | IA i (Male) ; IB i(Female) |
Which of the following pair of gases is mainly responsible for the greenhouse effect?
1. Carbon dioxide and methane
2. Ozone and Ammonia
3. Oxygen and Nitrogen
4. Nitrogen and Sulphur dioxide
Which of the following is the most important cause for animals and plants being driven to extinction?
1. Alien species invasion
2. Habitat loss and fragmentation
3. Drought and floods
4. Economic exploitation
The body of the ovule is fused within the funicle at :
1. Micropyle
2. Nucellus
3. Chalaza
4. Hilum
Changes in GnRH pulse frequency in females is controlled by circulating levels of :
1. | estrogen and inhibin | 2. | progesterone only |
3. | progesterone and inhibin | 4. | estrogen and progesterone |
The majority of carbon dioxide produced by our body cells is transported to the lungs:
1. dissolved in the blood | 2. as bicarbonates |
3. as carbonates | 4. attached to haemoglobin |
Capacitation occurs in
1. rete testis
2. epididymis
3. vas deferens
4. female reproductive tract
Which of the following is correct regarding HIV, hepatitis B, gonorrhoea, and trichomoniasis?
1. | Trichomoniasis is an STD whereas others or not. |
2. | Gonorrhoea is a viral disease whereas others are bacterial. |
3. | HIV is a pathogen whereas others are diseases. |
4. | Hepatitis B has been eradicated completely whereas others have not. |
Which of the following describes the given graph correctly?
1. Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme.
2. Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme.
3. Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme.
4. Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme.
Body having meshwork of cell, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of phylum:
1. | Porifera | 2. | Mollusca |
3. | Protozoa | 4. | Coelenterate |
Sponges are mostly:
1. | Asymmetrical | 2. | Radially symmetrical |
3. | Bilateraly symmetrical | 4. | Biradially symmetrical |
Match the following list of animals with their level of organization.
Division of Labour | Animal | ||
A. | Organ level | i. | Pheritima |
B. | Cellular aggregate level | ii. | Fasciola |
C. | Tissue level | iii. | Spongilla |
D. | Organ system level | iv. | Obelia |
Choose the correct match showing division of labour with animal example:
i | ii | iii | iv | |
1. | B | C | D | A |
2. | B | D | C | A |
3. | D | A | B | C |
4. | A | D | C | B |
Choose the correctly matched pair
1. Tendon-Specialized connective tissue
2. Adipose tissue-Dense connective tissue
3. Areolar tissue- Loose connective tissue
4. Cartilage-Loose connective tissue
The inner lining of the trachea and large bronchi is covered by:
1. Pseudostartified epithelium
2. Ciliated cuboidal epithelium
3. Transitional epithelium
4. Squamous epithelium
Cannabinoid receptors are principally located in the brain but they also have side effects on:
1. | GIT | 2. | CVS |
3. | Liver | 4. | Lungs |
RNAi, as a mechanism of cellular defense, takes place in:
1. | All bacteria | 2. | All unicellular organisms |
3. | All plants only | 4. | All eukaryotic organisms |
Gene cloning occurs:
1. | when a phage transfers bacterial DNA from one bacterium to another. |
2. | when a bacterium takes up DNA from the surrounding fluid. |
3. | when a bacterium carrying a recombinant plasmid reproduces, thus allowing for the production of multiple copies of the recombinant plasmid. |
4. | when DNA is produced from an RNA template. |
Jaundice is a disorder of
1. Skin and eyes.
2. Digestive system.
3. Circulatory system.
4. Excretory system.
A pregnant female delivers a baby who suffers from stunted growth, mental retardation, low intelligence quotient and abnormal skin. This is the result of
1. Deficiency of iodine in diet
2. Low secretion of growth hormone
3. Cancer of the thyroid gland
4. Over secretion of pars distalis
Compared to blood our lymph has
1. More RBCs and less WBCs
2. No plasma
3. Plasma without proteins
4. More WBCs and no RBCs
Which statement regarding enzyme inhibition is correct?
1. Competitive inhibition occurs when a substrate competes with enzyme for binding to inhibitor protein
2. Competitive inhibition occurs when a substrate and the inhibitor compete for active site on the enzyme
3. Non-competitive inhibition of an enzyme can be overcome by adding a large amount of substrate
4. Non-competitive inhibitors often bind to the enzyme irreversibly
Cornea transplant in humans is almost never rejected. This is because
1. It is a non-living layer.
2. Its cells are least penetrable by bacteria.
3. It has no blood supply.
4. It is composed of enucleated cells.
Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.
Pairs of skeletal parts | Category | |
1. | Malleus and stapes | Ear ossicles |
2. | Sternum and ribs | Axial skeleton |
3. | Clavicle and glenoid cavity | Pelvic girdle |
4. | Humerus and ulna | Appendicular skeleton |
A fall in glomerular filtration rate (GFR) activates
1. Adrenal medulla to release adrenaline
2. Posterior pituitary to release vasopressin
3. Juxta glomerular cells to release renin
4. Adrenal cortex to release aldosterone
Which pair of hormones will both bind to membrane bound receptors located on its target cells?
1. Epinephrine and thyroxine
2. Calcitonin and glucagon
3. Estradiol and triiodothyronine
4. Adrenaline and aldosterone
Lysozyme and thiocynate ions present in saliva:
1. hydrolyse amylose but not amylopectin
2. hydrolyse amylopectin but not amylase
3. help bacterial flora in oral cavity to thrive
4. are very important for oral hygiene
Between childhood and puberty, the ovaries will have follicles containing:
1. | Primary oocyte | 2. | Secondary oocyte |
3. | Ootid | 4. | Ovum |
The trophoblast cells of the blastocyst form:
1. | Embryo | 2. | Umbilical cord |
3. | Placenta | 4. | Teratoma |
Which accessory sex duct is cut and ligated during the vasectomy procedure?
1. | Vasa efferentia | 2. | Vas deferens |
3. | Epididymis | 4. | Prostatic urethra |
If potassium ions were the only factor causing resting membrane potential, the resting potential inside the fiber would be nearly equal to:
1. - 55 mV
2. - 70 mV
3. - 94 mV
4. + 61 mV
In the given diagram of olfactory membrane, identify the olfactory receptor cell:
1. A | 2. B |
3. C | 4. D |
The autonomic regulation of cardiac activity is carried out by a neural center located in:
1. | Medulla oblongata | 2. | Hypothalamus |
3. | Cerebrum | 4. | Thalamus |
The duration of inspiration can be reduced by:
1. | an increase of carbon dioxide in blood |
2. | a chemical signal from aortic and carotid bodies |
3. | a neural signal from pneumotaxic center |
4. | an increase in hydrogen ion concentration in CSF |
Juxtamedullary nephrons:
1. are more common than cortical nephrons
2. do not have a well developed vasa recta associated with them
3. play a very important role in concentration of urine
4. produce angiotensinogen
The average weight of the human kidney varies between:
1. 80 – 120 gm | 2. 120 – 170 gm |
3. 180 – 200 gm | 4. 225 – 245 gm |
Abnormal curvature of the vertebral column where the alignment shows a lateral deviation is called as:
1. | kyphosis | 2. | lordosis |
3. | scoliosis | 4. | ankylosis |
A selectable marker is used to :
1. help in eliminating the non-transformants so that the transformants can be regenerated
2. identify the gene for the desired trait in an alien organism
3. select a suitable vector for transformation in a specific crop
4. mark a gene on a chromosome for isolation using restriction enzyme
Colostrum, the yellowish fluid, secreted by mother during the initial days of lactation is very essential to impart immunity to newborn infants because it contains:
1. | Immunoglobulin A |
2. | Natural killer cells |
3. | Monocytes |
4. | Macrophages |
Which of the following statements is not correct?
1. The proinsulin has an extra peptide called C-peptide
2. The functional insulin has A and B chains linked together by hydrogen bonds.
3. Genetically engineered insulin is produced in E-Coli.
4. In man, insulin is synthesized as proinsulin.
A steroid hormone which regulates glucose metabolism is:
1. cortisol
2. corticosterone
3. 11- deoxycorticosterone
4. cortisone
Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of
1. Residual Volume (RV)
2. Inspiratory Reserve Volume (IRV)
3. Tidal Volume (TV)
4. Expiratory Reserve Volume (ERV)
A person entering an empty room suddenly finds a snake, right in front, on opening the door. Which one of the following is likely to happen in his neurohormonal control system?
1. Sympathetic nervous system is activated, releasing epinephrine and norepinephrine from adrenal medulla
2. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
3. Hypothalamus activates the parasympathetic division of brain
4. Sympathetic nervous system is activated, releasing epinephrine and norepinephrine from adrenal cortex
The part of the fallopian tube closest to the ovary is:
1. | isthmus | 2. | infundibulum |
3. | cervix | 4. | ampulla |
Thickening of arteries due to cholesterol deposition is:
1. | atherosclerosis | 2. | rheumatic heart |
3. | blood pressure | 4. | cardiac arrest |
The measurement of which of the following would be indicator of the degree of inhibition by a competitive enzyme inhibitor?
1. Vmax
2. The y-intercept on a Limeweaver-Burke Plot
3. Km
4. ¼ Vmax
The rising of dough is due to:
1. Multiplication of yeast
2. Production of CO2
3. Emulsification
4. Hydrolysis of wheat flour starch into sugars
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.
What kind of evidence suggested that man is more closely related to a chimpanzee than to other hominoid apes?
1. | Comparison of chromosome morphology only. |
2. | Evidence from fossil remains, and the fossil mitochondrial DNA alone. |
3. | Evidence from DNA extracted from sex chromosomes, autosomes, and mitochondria. |
4. | Evidence from DNA from sex chromosomes only. |
Malignant tertian malaria is caused by Plasmodium:
1. | vivax | 2. | ovale |
3. | falciparum | 4. | malariae |
The most critical evolutionary process, that leads to changes in allele frequencies and favors or promotes adaptation as a product of evolution, is :
1. | Genetic drift | 2. | Gene migration |
3. | Mutation | 4. | Natural selection |
The cranial capacity of Homo erectus was around:
1. 450 cc
2. 700 cc
3. 900 cc
4. 1000 cc
Flowering plants (angiosperms) first appeared during :
1. Paleozoic era
2. Carboniferous period
3. Cretaceous period
4. Cenozoic era
Given below is a diagrammatic sketch for a portion of the human male reproductive system. Select the correct set of the names of the parts labelled a, b, c, d:
(a) |
(b) |
(c) |
(d) |
|
1. |
Ureter |
Seminal Vesicle |
Prostate |
Bulbourethral gland |
2. |
Ureter |
Prostate |
Seminal Vesicle |
Bulbourethral gland |
3. |
Vas deferens |
Seminal Vesicle |
Prostate |
Bulbourethral gland |
4. |
Vas deferens |
Seminal Vesicle |
Bulbourethral gland |
Prostate |
With respect to the red muscle fibers [Type I], the white muscle fibers [Type II] are richer in:
1. | Blood capillaries | 2. | Myoglobin |
3. | Sarcoplasmic reticulum | 4. | Mitochondria |