The water potential of pure water is
1. zero
2. less than zero
3. more than zero, but less than one
4. more than one
You are asked to measure transpiration rates on both the surfaces of Sunflower leaf. The transpiration rate is expected to be:
1. Lesser on upper surface and more on lower surface
2. Lesser on lower surface and more on upper surface
3. Equal on both the surfaces
4. Zero on upper surface
Match the element with its associated functions/roles and choose the correct option among given below:
A. Boron |
i. Splitting of H2O to liberate O2 during photosynthesis |
B. Manganese |
ii. Needed for synthesis of auxins |
C. Molybdenum |
iii. Component of nitrogenase |
D. Zinc |
iv. Pollen germination |
E. Iron |
v. Component of ferredoxin |
Options:
A | B | C | D | E | |
1. | i | ii | iii | iv | v |
2. | iv | i | iii | ii | v |
3. | iii | ii | iv | v | i |
4. | ii | iii | v | i | iv |
The correct sequence of cell organelles during photorespiration is
1. chloroplast-golgi bodies-mitochondria
2. chloroplast-rough endoplasmic reticulum-dictyosomes
3. chloroplast-peroxisome-mitochondria
4. chloroplast-vacuole-peroxisome
When do you think the chloroplasts will be aligned with their flat surfaces parallel to the walls of the mesophyll cells?
1. In dark
2. When light intensity is low
3. When light intensity is high
4. They are always aligned parallel to the walls
The enzymatic machinery to partially oxidize glucose without the help of oxygen is present in:
1. All living organisms
2. All prokaryotes only
3. Prokaryotes and obligate anaerobes only
4. Facultative and obligate anaerobes only
What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?
1. Green plants need light to perform photosynthesis
2. Green plants seek light because they are phototropic
3. Light stimulates plant cells on the lighted side to grow faster
4. Auxin accumulates on the shaded side, stimulating greater cell elongation
All the following relations are examples of commensalism except:
1. Sea anemone and clown fish
2. Cattle egret and grazing cattle
3. Barnacles growing on the back of whale
4. Cuscuta growing on hedge plants
In a biosphere reserve, active cooperation with local people is established in the:
1. | Natural zone | 2. | Core zone |
3. | Buffer zone | 4. | Transition zone |
Which of the following structure is not found in a prokaryotic cell?
1.Ribosome
2.Mesosome
3.Plasma membrane
4.Nuclear envelope
Which of the following statements is true for a secretory cell?
1. Golgi apparatus is absent
2. Rough Endoplasmic Reticulum (RER) is easily observed in the cell
3. Only Smooth Endoplasmic Reticulum (SER) is seen in the cell
4. Secretary granules are formed in nucleus
Which of the following shows coiled RNA strand and capsomeres?
1. Polio virus
2. Tobacco mosaic virus
3. Measles virus
4. Retro virus
Synapsis occurs between
1. mRNA and ribosomes
2. Spindle fibers and centromere
3. Two homologous chromosomes
4. A male and a female gamete
A lateral branch arises from the base of the main axis and after growing aerially for some time arches downwards to touch the ground in:
1. Opuntia and Euphorbia | 2. Mint and Jasmine |
3. Pistia and Eichhornia | 4. Banana and Pineapple |
When sepals or petals in a whorl just touch one another at the margin, without overlapping, the aestivation is said to be:
1. | Valvate | 2. | Twisted |
3. | Imbricate | 4. | Vexillary |
The hypodermis of a dicotyledonous stem:
1. is parenchymatous and synthesizes and stores food
2. is collenchymatous and provides mechanical strength to the young stem
3. is sclerenchymatous and provides mechanical strength to the young stem
4. is parenchymatous and provides mechanical strength to the young stem
All the following are significances of mitosis except:
1. Restoration of nuclear/cytoplasmic ratio
2. Growth of living organisms
3. Replacement of lost cells
4. Generation of genetic variation
A prolonged resting phase in oogenesis as seen in many vertebrate oocytes is called as:
1. Interkinesis | 2. Diakinesis |
3. Diplotene | 4. Prometaphase II |
The phenomenon of red tides is associated with blooms of:
1. Zooxanthelle | 2. Gonyaulax |
3. Blue green algae | 4. Ctenoplana and Beroe |
The microstrobilus in gymnosperms represents the:
1. | "female" cone | 2. | megasporangium-bearing cone |
3. | pollen-bearing cone | 4. | none of these |
Identify the incorrectly matched pair:
1. |
Numerical taxonomy |
Based on all observable characteristics |
2. |
Cytotaxonomy |
Based on chromosome number, structure and behavior |
3. |
Chemotaxonomy |
Based on chemotrophic mode of nutrition |
4. |
Phylogenetic system |
Based on evolutionary relationships |
Perhaps the most obvious and technically complicated feature of all living organisms is:
1. Capability to reproduce to produce similar offspring
2. Ability to grow from inside
3. Ability to sense and respond to environmental stimuli
4. Metabolism inside a defined boundary of a cell
In a fertilised embryo sac, the haploid, diploid, and triploid structures are:
1. | Synergid, zygote, and primary endosperm nucleus |
2. | Synergid, antipodal and polar nuclei |
3. | Antipodal, synergid, and primary endosperm nucleus |
4. | Synergid, polar nuclei and zygote. |
Fruit colour in squash is an example of :
1. Recessive epistasis
2. Dominant epistasis
3. Complementary genes
4. Inhibitory genes
Which one of the following statements is not true?
1. | Pollen grains of some plants cause severe allergies and bronchial afflictions in some people. |
2. | The flowers pollinated by flies and bats secrete foul odour to attract them. |
3. | Honey is made by bees by digesting pollen collected from flowers. |
4. | Pollen grains are rich in nutrients, and they are used in the form of tablets and syrups. |
During transcription, RNA polymerase binds to DNA site
1. Regulator
2. Promoter
3. Enhancer
4. Receptor.
Commonly used vectors for human genome sequencing are:
1. T - DNA
2. BAC and YAC
3. Expression Vectors
4. T/A Cloning Vectors
Which of the following is not true for the Law of Dominance given by Mendel?
1. | Characters are controlled by discrete units called factors. |
2. | Factors occur in pairs. |
3. | In a dissimilar pair of factors, one member of the pair dominates the other. |
4. | The alleles show blending at the time of fertilization. |
In the case of co-dominance, the F1 generation resembles:
1. | Dominant parent | 2. | Recessive parent |
3. | Both the parents | 4. | None of the parents |
Haemophilia is inherited as a/an __________ condition.
1. | Autosomal recessive | 2. | Autosomal dominant |
3. | Sex linked recessive | 4. | Sexlinked dominant |
Which of the following acts as a ribozyme for peptide bond formation in bacteria?
1. | 5s rRNA | 2. | 23s rRNA |
3. | 16s rRNA | 4. | 5.1s rRNA |
Filiform apparatus is associated with _____ and helps in _____________.
1. Syngergids; Nourishment of egg cells
2. Synergids; Guiding the pollen tube
3. Antipodals; Nourishment of egg cells
4. Antipodals; Guiding the pollen tube
What defines the template and coding strand of DNA for transcription?
1. Presence of the structural gene in a transcription unit
2. The core RNA polymerase enzyme
3. Presence of the promoter in a transcription unit
4. Presence of 3’ – 5’ TAC codon on the DNA template
The full potential of penicillin as an antibiotic was established by:
1. | Alexander Fleming | 2. | Florey and Chain |
3. | Avery and McCarty | 4. | Hershey and Chase |
Cyclosporin A, used as an immuno suppression agent, is produced from
(1) Monascus purpureus
(2) Saccharomyces cerevisiae
(3) Penicillium notatum
(4) Trichoderma polysporum
Mycorrhiza is an example of:
1. | Symbiotic relationship | 2. | ectoparasitism |
3. | endoparasitism | 4. | decomposers |
The logistic population growth is expressed by the equation:
1. | 2. | ||
3. | 4. |
Carbon dioxide is returned to the atmosphere by all the following except:
1. photosynthesis by the primary producers
2. respiratory activities of producers and consumers
3. decomposers
4. volcanic activity
In which of the following do both pairs have the correct combination?
1. | In situ conservation: Cryopreservation Ex situ conservation: Wildlife Sanctuary |
2. | In situ conservation: Seed Bank Ex situ conservation: National Park |
3. | In situ conservation: Tissue culture Ex situ conservation: Sacred groves |
4. | In situ conservation: National Park Ex situ conservation: Botanical Garden |
The two gases making the highest relative contribution to the greenhouse gases are:
1. and
2. CFCs and
3. and
4. and
Which of the following is not a consequence of global warming?
1. | a rise in sea levels |
2. | a change in precipitation patterns |
3. | an equatorial shift of many species |
4. | eruption of plant diseases, pests, and weeds |
Polysome is formed by
1. A ribosome with several subunits
2. Ribosomes attached to each other in a linear arrangement
3. Several ribosomes attached to a single mRNA
4. Many ribosomes attached to a strand of endoplasmic reticulum
Mitotic spindles are mainly composed of which protein?
1. | Actin | 2. | Tubulin |
3. | Actomyosin | 4. | Myoglobin |
The outermost and innermost wall layers of microsporangium in an anther are respectively:
1. Endothecium and tapetum
2. Epidermis and endodermis
3. Epidermis and middle layer
4. Epidermis and tapetum
Both sickle cell anaemia and Huntington’s chorea are
1. Virus related diseases
2. Bacteria related diseases
3. Congenital disorders
4. Pollution induced disorders
Parthenocarpic fruits are produced by:
1. | Treating plants with phenyl Mercuric acetate. |
2. | Treating plants with low concentrations of gibberellic acid and auxin. |
3. | Removing androecium of flowers before releasing pollen grains. |
4. | Raising plants from vernalised seeds. |
What facilitates the opening of the helix during the elongation step of transcription?
1. | RNA polymerase | 2. | Helicase |
3. | Topoisomerase | 4. | Gyrase |
Which of the following is true for both transcription and DNA replication?
1. | The principle of complementarity governs the processes |
2. | Only if the two strands act as a template |
3. | Only a segment of both strands is involved |
4. | Adenine base pairs with thymine |
Cross hybridisation among the selected parents is frequently used for the improvement of crop plants. Which of the following is not a shortcoming of the process?
1. | The combination of desired characters may always not be possible |
2. | It can be a tedious and time-consuming process |
3. | Undesirable characters may get introduced |
4. | The number of progeny is very limited |
Consider the two statements:
I: | Organisms exhibiting external fertilisation show great synchrony between the sexes. |
II: | Such organisms release a large number of gametes into the surrounding medium (water). |
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. |
Approximately what percentage of existing animal species are invertebrates?
1. | 20 | 2. | 50 |
3. | 70 | 4. | 95 |
In a child of 15 years age, plasma calcium level is diagnosed below optimum level. Which organ is malfunctioning?
1. | Thyroid gland | 2. | Liver |
3. | Parathyroid | 4. | Posterior lobe of pituitary |
Which one of the following statements in regard to excretion by the human kidneys is correct?
1. Descending limb of loop of Henle is impermeable to water
2. Distal convoluted tubule is incapable of reabsorbing HCO-3
3. Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules
4. Ascending limb of loop of Henle is impermeable to electrolytes
In man, in which part of the uriniferous tubule reabsorption of glucose occurs?
1. Collecting tube
2. Henle's loop
3. Distal convoluted tubule
4. Proximal convoluted tubule
Injury to vagus nerve in humans is not likely to affect
1. tongue movements
2. gastrointestinal movements
3. pancreatic secretion
4. cardiac movements.
Which one of the following pairs of the kind of cells and their secretion is correctly matched?
1. Oxyntic cells --- a secretion with pH between 2.0 and 3.0
2. Alpha cells of islets of Langerhans ---- secretion that decreases blood sugar level
3. Kupffer cells --- a digestive enzyme that hydrolyses nucleic acids
4. Sebaceous glands --- a secretion that evaporates for cooling
People who have migrated from the planes to an area adjoining Rohtang Pass about six months back
1. have more RBCs and their haemoglobin has a lower binding affinity to
2. are not physically fit to play games like football
3. suffer from altitude sickness with symptoms like nausea, fatigue, etc.
4. have the usual RBC count but their haemoglobin has very high binding affinity to
What is the figure given below showing in particular?
1. | Ovarian cancer | 2. | Uterine cancer |
3. | Tubectomy | 4. | Vasectomy |
Which one of the following statements is incorrect?
1. In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.
2. The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex.
3. The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate.
4. A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex.
Infection of Ascaris usually occurs by
1. Eating imperfectly cooked pork.
2. Tse - tse fly.
3. Mosquito bite.
4. Drinking water containing eggs of Ascaris
Which one of the following sets of animals share a four chambered heart?
1. Amphibians, Reptiles, Birds
2. Crocodiles, Birds, Mammals
3. Crocodiles, Lizards, Turtles
4. Lizards, Mammals, Birds
Mast cells of connective tissue contain
1. vasopressin and relaxin
2. heparin and histamine
3. heparin and calcitonin
4. serotonin and melanin
Which one of the followings statements is true for cockroach?
1. The numbers of ovarioles in each ovary are ten.
2. The larval stage is called caterpillar.
3. Anal styles are absent in females.
4. They are ureotelic.
The trigger for activation of toxin of Bacillus thuringiensis is:
1. | Acidic pH of stomach |
2. | High temperature |
3. | Alkaline pH of gut |
4. | Mechanical action in the insect gut |
In which disease does the mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels?
1. | Elephantiasis | 2. | Amoebiasis |
3. | Ringworm disease | 4. | Ascariasis |
In Bt cotton, the Bt toxin present in plant tissue as pro-toxin is converted into active toxin due to:
1. Acidic pH of the insect gut
2. Action of gut micro-organisms
3. Presence of conversion factors in insect gut
4. Alkaline pH of the insect gut
Rheumatoid arthritis is:
1. X – linked recessive disorder
2. Congenital disorder
3. A viral infection
4. An auto-immune disorder
The following palindrome is recognized by the restriction enzyme:
1. | BamHI | 2. | EcoRI |
3. | HindII | 4. | PstI |
Damage to thymus in a child may lead to
1. A reduction in haemoglobin content of blood
2. A reduction in stem cell production
3. Loss of antibody mediated immunity
4. Loss of cell mediated immunity
Which of the following substances, if introduced into the bloodstream, would cause coagulation of blood at the site of its introduction?
1. Thromboplastin
2. Fibrinogen
3. Heparin
4. Prothrombin
The most abundant enzyme is :
1. Carbonic anhydrase
2. Nitrogenase
3. Catalase
4. Rubisco
Which of the following pairs is correctly matched?
Joint |
Location |
|
1 |
Fibrous joint |
Between phalanges |
2 |
Cartilaginous joint |
Skull bones |
3 |
Gliding joint |
Between zygapophysial of the successive vertebrae |
4 |
Hinge joint |
Between vertebrae |
The functions regulated or influenced by thyroid glands in humans include all except:
1. | basal metabolic rate | 2. | erythropoeisis |
3. | water and electrolyte balance | 4. | sleep wakefulness cycle |
Which of the following is a sub-mucosal gland?
1. Sublingual salivary gland
2. Pyloric glands
3. Brunner’s glands
4. Submandibular salivary gland
Identify the part that helps in the collection of the ovum after ovulation:
1. | 4 | 2. | 5 |
3. | 6 | 4. | 7 |
What is the usual number of primary follicles in both ovaries of a female at puberty?
1. | 60000 – 80000 | 2. | 120000 – 160000 |
3. | 1 million to 2 million | 4. | About 7 million |
From outside to inside, the correct sequence of cells in the inner layer of human retina will be:
1. Photoreceptor cells, Bipolar cells, Ganglion cells
2. Ganglion cells, Bipolar cells, Photoreceptor cells
3. Photoreceptor cells, Ganglion cells, Bipolar cells
4. Ganglion cells, Photoreceptor cells, Bipolar cells
To increase their contraceptive efficiency, the barrier contraceptives in females are used with:
1. | IUDs | 2. | OCPs |
3. | Spermicidal chemicals | 4. | Implants |
Crista ampullaris is found in:
1. Semi-circular canals | 2. Utricle |
3. Saccule | 4. Cochlea |
To prevent eryhtroblastosis fetalis in future pregnancies:
1. | Anti-Rh Immunoglobulins must be given to Rh –ve mothers at the time of each delivery |
2. | Anti-Rh Immunoglobulins must be given to new born at the time of each delivery |
3. | Rh Antigens must be given to new born at the time of each delivery |
4. | Anti Antigens must be given to Rh –ve mothers at the time of each delivery |
The volume of thoracic chamber in the antero-posterior axis can be increased by:
1. Contraction of diaphragm
2. Relaxation of diaphragm
3. Contraction of external intercostals
4. Contraction of internal intercostals
JGA is a special sensitive region formed by cellular modifications in the:
1. DCT and the afferent arteriole at the location of their contact
2. DCT and the efferent arteriole at the location of their contact
3. PCT and the afferent arteriole at the location of their contact
4. PCT and the efferent arteriole at the location of their contact
The joint between atlas and axis vertebra is classified as:
1. | Saddle joint | 2. | Pivot joint |
3. | Gliding joint | 4. | Hinge joint |
The sequence that controls the copy number of the linked DNA in the vector, is termed :
1. Ori site
2. Palindromic sequence
3. Recognition site
4. Selectable marker
Select the correct option of haploid cells from the following groups :
(1) Primary oocyte, Secondary oocyte, Spermatid
(2) Secondary spermatocyte, First polar body, Ovum
(3) Spermatogonia, Primary spermatocyte, Spermatid
(4) Primary spermatocyte, Secondary spermatocyte, Second polar body
Choose the correct statement:
1. Nociceptors respond to changes in pressure
2. Meissner’s corpuscles are thermoreceptors
3. Photoreceptors in the human eye are depolarised during darkness and become hyperpolarised in response to the stimulus
4. Receptors do not produce graded potentials
If a stimulus, several times greater than the threshold stimulus, is provided to a muscle fiber, it will
1. Contract with a larger force
2. Contract with a smaller force
3. Contract with the same force
4. Undergo tetany
If for some reason, the vasa efferentia in the human reproductive system get blocked, the gametes will not be transported from:
1. | epididymis to vas deferens | 2. | ovary to uterus |
3. | vagina to uterus | 4. | testes to epididymis |
Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms?
1. Thiamine
2. Folic acid and cobalamine
3. Riboflavin
4. Iron compounds
Grey crescent is the area
1. at the point of entry of sperm into ovum
2. just opposite to the site of entry of sperm into ovum
3. at the animal pole
4. at the vegetal pole
Which of the following is not a plasmid?
1. | pSC101 | 2. | pUC18 |
3. | BamHI | 4. | pBR322 |
What level of protein organization structure explains the 3-D shape of an enzyme?
1. primary structure | 2. tertiary structure |
3. secondary structure | 4. quaternary structure |
Which of the following is not the causal organism for ringworm?
1. | Microsporum | 2. | Trichophyton |
3. | Epidermophyton | 4. | Macrosporum |
If a random mating population is in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner?
1. Mutations
2. Random drift
3. Selection
4. Migration
In Britain, with the passage of clean air legislation, the frequency of melanic forms of the peppered moth decreased dramatically. This is called :
1. | saltatory evolution | 2. | retrograde evolution |
3. | reverse evolution | 4. | Antievolution |
The wings of birds, the forelegs of a horse, and the upper limbs of humans are:
1. | analogous structures | 2. | homologous structures |
3. | vestigial structures | 4. | phylogenetic structures |
According to the Darwinian concept of evolution, a giraffe has a long neck because:
1. | it was always like that since the beginning |
2. | during evolution the number of cervical vertebrae got increased |
3. | its ancestors stretched their necks to get food |
4. | ancestral giraffes with longer necks got more food and left more surviving offspring |
What would be the approximate volume of blood pumped by both ventricles under normal resting physiological conditions in a healthy human adult?
1. | 10 L | 2. | 8 L |
3. | 5 L | 4. | 2.5 L |
The source of energy that can be directly used by muscle for contraction is:
1. GTP
2. ATP
3. Creatine phosphate
4. Glucose
By which method was a new breed 'Hisardale' of sheep found by using Bikaneri ewes and Marina rams?
1. Mutational breeding
2. cross breeding
3. Inbreeding
4. Out crossing