During muscle contraction, the event shown in the following diagram describes:
1. cross bridge detachment
2. the power stroke or working stroke
3. cross bridge formation
4. cocking of myosin head
Identify the incorrectly matched pair [assume normal physiological conditions]:
1. GFR – 125 ml/min
2. Amount of urea produced – 25 to 30 mg/day
3. Average urine output – 1 to 1.5 liter/day
4. Average amount of blood filtered by kidney – 1100 to 1200 ml/min
The peripheral chemoreceptors for regulation of respiration are located:
1. adjacent to the rhythm center
2. near arch of aorta and carotid artery
3. in the walls of trachea
4. in the walls of the alveoli
In the nodal tissue of the human heart, the highest conduction velocity is seen in:
1. Internodal pathway | 2. AV node |
3. AV bundle or Bundle of His | 4. Purkinje fibers |
The olfactory bulb can be regarded as the extension of:
1. Brain stem | 2. Limbic system |
3. Diencephalon | 4. Corpora quadrigemina |
One of the first regions of the human brain to suffer damage in Alzheimer’s disease is the:
1. Hypothalamus
2. Cerebrum
3. Hippocampus
4. Amygdala
In human beings, the embryo heart is formed about after ________ of pregnancy.
1. | One month | 2. | Two months |
3. | First trimester | 4. | Second trimester |
An ideal contraceptive should not:
1. Be user friendly
2. Be effective and reversible
3. Have the least side effects
4. Interfere with sexual drive
During pregnancy:
1. | All events of menstrual cycle stop and there is no menstruation |
2. | Events of menstrual cycle continue but there is no menstruation |
3. | Events of menstrual cycle continue but there is menstruation only in the first trimester |
4. | All events of menstrual cycle stop and there is menstruation only in the first trimester |
Trypsinogen is activated by
1. an enzyme enterogastrone
2. a hormone enterogastrone
3. an enzyme, enterokinase
4. a hormone, enterokinase
Consider the following regarding the actions of steroidal hormones produced by human ovary:
I. Estrogen is responsible for the development and maintenance of secondary sexual characters in females
II. Progesterone is a pregnancy hormone
III. Estrogen regulates female sexual behavior
IV. Progesterone stimulates the formation of alveoli in mammary glands
Select correct statements from above statements
1. I, II and III | 2. I, II and IV |
3. II, III and IV | 3. I, II, III and IV |
Which of the following is not considered as a part of the endo-membranous system of a eukaryotic cell?
1. | Lysosomes | 2. | Vacuoles |
3. | Endoplasmic reticulum | 4. | Peroxisomes |
Consider the following statements regarding meiosis:
I. At metaphase I, the microtubules from the opposite poles of the spindle attach to the pair of homologous chromosomes.
II. At anaphase I, the homologous chromosomes separate, while sister chromatids remain associated with each other.
Of the two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
In competitive inhibition, if the concentration of the substrate is increased :
1. the rate of the reaction is increased
2. the rate of the reaction is decreased
3. the rate of the reaction is not affected
4. the reaction direction is reversed
What is true regarding the activated sludge generated during the secondary treatment of sewage water?
I: | It is made up of aerobic bacteria that sediment down |
II: | A large part of the activated sludge is pumped back into the aeration tank to serve as the inoculum. |
III: | A minor part of the sludge is pumped into large tanks called anaerobic sludge digesters. |
1. | Only I | 2. | Only II and III |
3. | Only I and III | 4. | I, II and III |
What limitation of traditional hybridization procedures used in plant and animal breeding can be overcome by recombinant DNA procedures?
I: | Inclusion and multiplication of undesirable genes |
II: | Inability of inclusion of desirable traits from other species |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
The genetic drift is also called as :
1. Sewall-wright effect
2. Hardy-Weinberg equilibrium
3. Balanced polymorphism
4. Gene flow
“Organisms that share common descent show underlying embryological patterns on which they build later their adult patterns”. This is :
1. | Haeckel’s law | 2. | Baer’s law |
3. | Gauss law | 4. | Allen’s rule |
Recombinant therapeutic [used for treatment] products are available for all the following disorders except:
1. | Hemophilia A | 2. | Pituitary dwarfism |
3. | Diabetes insipidus | 4. | Anemia due to renal failure |
Which of the following pairs of codons encode the same amino acid?
1. | AUG and AUC | 2. | UAA and UAC |
3. | GUA and GUG | 4. | UAG and UAC |
Identify the incorrect statement regarding test cross?
1. It is used to determine the genotype of an individual exhibiting a dominant phenotype.
2. The testcross parent is always homozygous recessive for all of the genes under consideration.
3. The purpose of the testcross is to discover how many different kinds of gametes are being produced by the individual whose genotype is in question.
4. A homozygous dominant individual will produce two types of progeny and a heterozygous individual will produce only one type of progeny.
Hisardale is a new breed of:
1. | Sheep developed by crossing Bikaneri ewes and Marino rams. |
2. | Sheep developed by crossing Bikaneri rams and Marino ewes. |
3. | Goat developed by crossing Bikaneri ewes and Marino rams. |
4. | Goat developed by crossing Bikaneri rams and Marino ewes. |
Syngamy in angiosperms results in the formation of:
1. | A haploid cell | 2. | A diploid cell |
3. | A triploid cell | 4. | A polyploid cell |
Majority of the flowering plants produce:
1. | Female flowers | 2. | Male flowers |
3. | Hermaphroditic flowers | 4. | Neutral flowers |
The part of the brain most commonly affected by the consumption of alcohol is :
1. | Medulla oblongata | 2. | Reticular formation |
3. | Cerebellum | 4. | Cerebrum |
Which of the following is not a feature of the double helix model of DNA?
1. | The two chains have anti-parallel polarity |
2. | A purine always comes opposite to a pyrimidine |
3. | The pitch of the DNA is 3.4 nm |
4. | The two chains are coiled in a left handed fashion |
What proportion of progeny in F2 generation in a Mendel monohybrid cross resembled the parent [of P generation] that expressed the recessive trait?
1. | ¼ | 2. | ½ |
3. | ¾ | 4. | 2/3 |
The scientific term for biological classification categories is:
1. Species | 2. Taxon |
3. Phylum | 4. Domain |
Consider the following two statements:
I. In Selaginella and Salvia, development of zygotes into young embryos takes place within the female gametophyte.
II. Selaginella and Salvia are homosporous pteridophytes
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
Which of the following is not a viral disease?
1. | Influenza | 2. | Yellow fever |
3. | Japanese encephalitis | 4. | Kala azar |
The body of Euglenoids is flexible because of presence of:
1. a cell wall made up of pseudopeptidoglycan
2. a protein rich pellicle and absence of cell wall
3. a phosphate ether bonding in phospholipids in cell membrane
4. lipopolysaccharide layer in the outer cell wall
In cockroach, a chitinous hard exoskeleton covers:
1. The head segment only
2. The head and the thorax segment only
3. The thorax and the abdomen only
4. The entire body
Triploblastic organization, bilateral symmetry but lack of coelom will be seen in:
1. | Planaria | 2. | Pheretima |
3. | Periplaneta | 4. | Pinctada |
A conjoint and open vascular bundle will be observed in the transverse section of
1. | Monocot root | 2. | Monocot stem |
3. | Dicot root | 4. | Dicot stem |
Rearrange the following zones as seen in the root in vertical section and choose the correct option.
A. Root hair zone
B. Zone of meristems
C. Rootcap zone
D. Zone of maturation
E. Zon of elongation
Options:
1. | C, B, E, A, D | 2. | A, B, C, D, E |
3. | D, E, A, C, B | 4. | E, D, C, B, A |
Axile placentation is not seen in:
1. | China rose | 2. | Tomato |
3. | Lemon | 4. | Pea |
What is not true regarding Cnidarians?
1. Body is mode of distinct tissues but true organs have not evolved
2. They are carnivores
3. They may have two body forms – polyps and medusa
4. The digestion is completely intra-cellular
If a population of 50 Paramoecium present in a pool increases to 150 after an hour, what would be the percent growth or birth rate per individual per hour?
1. | 100 | 2. | 200 |
3. | 50 | 4. | 150 |
The major source of noise pollution in the world is:
1. Office equipment
2. Transport system
3. Sugar, textile, and paper industries
4. Oil refineries and thermal power plants
Which of the following statements is not true regarding CNG?
1. It is non-polluting
2. It burns more efficiently than petrol and diesel
3. It cannot be siphoned off by thieves
4. It cannot be adulterated
What is common to Lantana, Eichhornia, and African catfish?
1. | All are endangered species in India. |
2. | All are keystone species. |
3. | All are mammals found in India. |
4. | All the species are neither threatened nor indigenous species of India. |
How much of the net primary productivity of a terrestrial ecosystem is eaten and digested by herbivores?
1. | 1% | 2. | 10% |
3. | 40% | 4. | 90% |
In a terrestrial ecosystem, a much larger fraction of energy flows through the:
1. | DFC | 2. | GFC |
3. | Either of DFC or GFC | 4. | Nither of DFC nor GFC |
For the purpose of ecological studies, the term population is applicable to individuals reproducing:
1. | Asexually | 2. | Sexually |
3. | Both 1 and 2 | 4. | Neither 1 nor 2 |
Plasticity in plant growth means that
1. Plant roots are extensible
2. Plant growth is dependent on the environment
3. Stems can extend
4. None of the above
For each ATP produced, what is the number of that passes through F0 from the intermembrane space to the matrix down the electrochemical proton gradient?
1. 1
2. 2
3. 3
4. 4
In pathway, the 4-carbon compound transported to bundle sheath cells most commonly is:
1. | Glutamic acid | 2. | Malic acid |
3. | Oxaloacetic acid | 4. | Fumaric acid |
This is an intext question, section 11.2.3, NCERT. What occupies the space between the cell wall and the shrunken protoplast in a plasmolyzed cell
1. Hypertonic solution
2. Hypotonic solution
3. Air
4. Nothing, a vacuum is created
Match the items given in Column I with those in Column II and select the correct option given below:
Column I | Column II | ||
(a) | Glycosuria | (i) | Accumulation of uric acid in joints |
(b) | Gout | (ii) | Mass of crystallised salts within the kidney |
(c) | Renal calculi | (iii) | Inflammation in glomeruli |
(d) | Glomerulonephritis | (iv) | Presence of glucose in urine |
Codes:
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (i) | (iv) |
2. | (i) | (iii) | (ii) | (iv) |
3. | (iii) | (ii) | (iv) | (i) |
4. | (iv) | (i) | (ii) | (iii) |
It is much easier for a small animal to run uphill than for a large animal, because
1. It is easier to carry a small body weight
2. Smaller animals have a higher metabolic rate
3. Small animals have a lower O2 requirement
4. The efficiency of muscles in large animals is less than in the small animals
A gymnast is able to balance his body upside down even in total darkness because of
1. Cochlea
2. Vestibular apparatus
3. Tectorial membrane
4. Organ of corti
Erythropoiesis starts in
1. Kidney
2. Liver
3. Spleen
4. Red bone marrow
The contraceptive ‘SAHELI’:
1. | is an IUD. |
2. | increases the concentration of estrogen and prevents ovulation in females. |
3. | blocks estrogen receptors in the uterus, preventing eggs from getting implanted. |
4. | is a post-coital contraceptive. |
The secretory phase in the human menstrual cycle is also called?
1. Luteal phase and it lasts for about 13 days.
2. Follicular phase and it lasts for about 13 days.
3. Luteal phase and it lasts for about 6 days.
4. Follicular phase and it lasts for about 6 days.
Which of the following gastric cells indirectly help in erythropoiesis?
1. Goblet cells
2. Mucous cells
3. Chief cells
4. Parietal cells
Given below is a sample of a portion of DNA strand. What is so special shown in it
5' GAATTC 3'
3' CTTAAG 5'
1. Replication completed
2. Deletion mutation
3. Start codon at the 5' end
4. Palindromic sequence of base pairs
The two polynucleotide chains of DNA are
1. Discontinuous
2. Antiparallel
3. Parallel
4. Semiconservative
Seed formation without fertilization in flowering plants involves the process of:
1. Apomixis
2. Sporulation
3. Budding
4. Somatic hybridization
The gynoecium consists of many free pistils in flowers of
1. Aloe
2. Tomato
3. Papaver
4. Michelia
Human insulin is being commercially produced from a transgenic species of
1. Rhizobium
2. Saccharomyces
3. Mycobacterium
4. Escherichia
The bacterium (Clostridium botulinum) that causes botulism is
1. A facultative aerobe
2. An-obligate aerobe
3. A facultative anaerobe
4. An obligate anaerobe
The term “linkage” was coined by :
1. T. Boveri
2. G. Mendel
3. W. Sutton
4. T.H. Morgan
The world’s highly prized wool yielding Pashmina breed is
1. Kashmir sheep - Afgan sheep cross.
2. Goat
3. Sheep
4. Goat - sheep cross
Which one of the following pairs is incorrectly matched?
Microorganism |
Product obtained |
|
1. |
Coliforms |
Vinegar |
2. |
Methanogens |
Gobar gas |
3. |
Yeast |
Ethanol |
4. |
Streptomycetes |
Antibiotic |
Which one represents male gamete?
1. Antipodals
2. Synergids
3. Endosperm
4. Pollen grain
Select the correct statement:
1. The leaves of gymnosperms are not well adapted to extremes of climate
2. Gymnosperms are both homosporous and heterosporous
3. Salvinia, Ginkgo and Pinus all are gymnosperms
4. Sequoia is one of the tallest trees
Which of the following statements is wrong for viroids?
1. Their RNA is of high molecular weight
2. They lack a protein coat
3. They are smaller than viruses
4. They cause infections
Pentamerous actinomorphic flowers, bicarpellary ovary with oblique septum and a fruit of capsule or berry, belong to the family
1. | Liliaceae | 2. | Asteraceae |
3. | Brassicaceae | 4. | Solanaceae |
Plants having little or no secondary growth are
1. | Grasses | 2. | Cycads |
3. | Conifers | 4. | Deciduous angiosperms |
Which one of the following groups of animals is correctly matched with its one characteristic feature without
even a single exception ?
1. Reptilia : possess 3 - chambered heart with one incompletely divided ventricle
2. Chordata : possess a mouth provided with an upper and lower jaw
3.Chondrichthyes : possess cartilaginous endoskeleton
4.Mammalia : give birth to young one
World Ozone Day is celebrated on
1. 5th June
2. 22nd April
3. 16th September
4. 21st April
Bhopal gas tragedy of 1984 took place because methyl isocyanate reacted with
1. DDT
2. Ammonia
3.
4. Water
According to IUCN Red List, what is the status of Red Panda (Ailurus fulgens)
1. Critically endangered species
2. Endangered species
3. Vulnerable species
4. Extinct species
Highest annual net primary productivity is of
1.Tropical deciduous forest
2. Temperate evergreen forest
3. Temperate deciduous forest
4. Tropical rain forest
The enzyme, decarboxylase, catalyses the following step :
1. conversion of citric acid to cis aconitic acid
2. fumaric acid to malic acid
3. oxalosuccinic acid to -ketoglutaric acid
4. malic acid to oxaloacetic acid
(a) | (b) | (c) | |
1. | Carboxylation | Decarboxylation | Reduction |
2. | Decarboxylation | Reduction | Regeneration |
3. | Fixation | Transamination | Regeneration |
4. | Fixation | Decarboxylation | Regeneration |
If by radiation, all nitrogenase enzymes are inactivated, then there will be no
1. Fixation of atmospheric nitrogen
2. Conversion from nitrate to nitrite in legumes
3. Conversion from ammonium to nitrate in soil
4. Fixation of nitrogen in legumes
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
Chemosensitive area of respiratory centre medulla is affected by
1. less and ions
2. less and ions
3. excess and H+ ions
4. excess and H+ ions.
Ectopic pregnancies are referred to as :
1. | pregnancies with a genetic abnormality |
2. | implantation of the embryo at a site other than the uterus |
3. | implantation of a defective embryo in the uterus |
4. | pregnancies terminated due to hormonal imbalance |
Which one of the following pairs of hormones are the examples of those that can easily pass through the cell membrane of the target cell and bind to a receptor inside it (mostly in the nucleus)?
1. | Insulin and glucagon | 2. | Thyroxine and insulin |
3. | Somatostatin and oxytocin | 4. | Cortisol and testosterone |
Experimental verification of the chromosomal theory of inheritance was done by:
(1) Sutton
(2) Boveri
(3) Morgan
(4) Mendel
Which is the important site of formation of glycoproteins and glycolipids in eukaryotic cells?
1. | Peroxisomes | 2. | Golgi bodies |
3. | Polysomes | 4. | Endoplasmic reticulum |
Flippers of Penguins and Dolphins are examples of:
1. Convergent evolution
2. Industrial melanism
3. Natural selection
4. Adaptive radiation
Floridean starch has structure similiar to:
1. | Amylopectin and glycogen | 2. | Mannitol and algin |
3. | Laminarin and cellulose | 4. | Starch and cellulose |
During Meiosis I, in which stage synapsis takes place?
1. Pachytene
2. Zygotene
3. Diplotene
4. Leptotene
Which is the basis of genetic mapping of the human genome as well as DNA fingerprinting ?
(1) Polymorphism in the DNA sequence
(2) Single nucleotide polymorphism
(3) Polymorphism in hnRNA sequence
(4) Polymorphism in the RNA sequence
Match the items in Column-I with those in Column-II :
Column I Column II
(a) Herbivores-Plants (i) Commensalism
(b) Mycorrhiza-Plants (ii) Mutualism
(c) Sheep-Cattle (iii) Predation
(d) Orchid-Tree (iv) Competition
Select the correct option from following :
(1) (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
(2) (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)
(3) (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)
(4) (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
Hormones stored and released from neurohypophysis are:-
1. Thyroid-stimulating hormone and Oxytocin
2. Oxytocin and Vasopressin
3. Follicle-stimulating hormone and leutinizing hormone
4. Prolactin and Vasopressin
Match the following columns with reference to cockroach and select the correct option :
Column I | Column II | ||
(a) | Grinding of the food particles | (i) | Hepatic caeca |
(b) | Secrete gastric juice | (ii) | 10th segment |
(c) | 10 pairs | (iii) | Proventriculus |
(d) | Anal cerci | (iv) | Spiracles |
(v) | Alary muscles |
(a) | (b) | (c) | (d) | |
1. | (iii) | (i) | (iv) | (ii) |
2. | (iv) | (iii) | (v) | (ii) |
3. | (i) | (iv) | (iii) | (ii) |
4. | (ii) | (iii) | (i) | (iv) |