Which of the following criteria does not pertain to facilitated transport?
1. Requirement of special membrane proteins
2. High selectivity
3. Transport saturation
4. Uphill transport
The evolution of C4 photosynthetic system is probably one of the strategies for:
1. | maximizing the availability of oxygen in spite of continuing high amount of water loss |
2. | maximizing availability of water in spite of continuing high amount of carbon dioxide loss |
3. | reducing the amount of water loss but leads to decreased availability of carbon dioxide |
4. | maximizing the availability of carbon dioxide while minimizing water loss |
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
1. leghaemoglobin
2. xanthophyll
3. carotene
4. cytochrome
In the leaves of -plants, malic acid synthesis during fixation occurs in
1. epidermal cells
2. mesophyll cells
3. bundle sheath
4. guard cells
The electrons needed to replace those removed from PS I are provided by:
1. | The LHC | 2. | Water |
3. | NADPH | 4. | PS II |
The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration. Arrows represent net reactants or products.
Arrows numbered 4, 8, 12 can all be
1. | NADH | 2. | ATP |
3. | H2O | 4. | FAD+ or FADH2 |
What is the metabolic fate of pyruvate?
1. It is the end product of glycolytic pathway
2. It is reduced to acetyl CoA in the presence of oxygen
3. It depends on the cellular needs
4. It is decarboxylated in the cytosol
During seed germination, its stored food is mobilised by:
1. | ethylene | 2. | cytokinin |
3. | ABA | 4. | gibberellin |
The fig tree is pollinated by a:
1. | Honeybee | 2. | Wasp |
3. | Bird | 4. | Moth |
The most effective means of conservation is to:
1. remove predators
2. preserve habitats
3. vaccinate against diseases
4. census the species during the breeding season
Identify the correct order of organisation of genetic material from largest to smallest:
1. Genome, chromosome, nucleotide, gene
2. Genome, chromosome, gene, nucleotide
3. Chromosome, genome, nucleotide, gene
4. Chromosome, gene, genome, nucleotide
Which of the following statements is not true for plasma membrane?
1. It is present in both plant and animal cells
2. Lipid is present as a bilayer in it
3. Proteins are present, integrated as well as loosely associated, with the lipid bilayer
4. Carbohydrate is never found in it
True nucleus is absent in :
1. Mucor
2. Vaucheria
3. Volvox
4. Anabaena
Identify the meiotic stage in which the homologous chromomes separate while the sister chromatids remain associated at their centromeres:
1. | Anaphase I | 2. | Anaphase II |
3. | Metaphase I | 4. | Metaphase II |
In papilionaceous aestivation:
1. standard overlaps the wings that overlap the keel
2. standard overlaps the keel that overlaps the wings
3. wings overlap the standard that overlaps the keel
4. keel overlaps the wings that overlap the standard
Scutellum is:
1. | shield shaped cotyledon in monocotyledons |
2. | protein layer in the outer endosperm in monocotyledons |
3. | starchy endosperm of dicotyledons |
4. | stony hard seed coat in some seeds |
In conjoint type of vascular bundles:
I: | xylem and phloem are jointly situated on the same radius of vascular bundles. |
II: | xylem is usually located on the outer side of the phloem. |
1. Only I is correct | 2. Only II is correct |
3. Both are correct | 4. Both are incorrect |
Which of the following is a feature of the anatomy of a monocot stem?
I. Collenchymatous hypodermis
II. Scattered vascular bundles
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
Consider the given two statements:
I. | Meiosis conserves a specific number of chromosomes across generations in sexually reproducing organisms |
II. | Meiosis results in a reduction of chromosome number by half |
1. Both I and II are true and II explains I
2. Both I and II are true 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 true for fungi belonging to the class Phycomycetes?
1. Aspetate and coenocytic mycelium
2. Spores endogenously produced in sporangium
3. Asexual reproduction by nonmotile zoospores or motile aplanospores
4. Found in aquatic habitats, decaying wood or as obligate parasites on plants
The given diagram shows:
1. Female thallus of Marchantia
2. Male thallus of Marchantia
3. Female thallus of Funaria
4. Male thallus of Funaria
The binomial system of nomenclature of living organisms was given by:
1. Carl Woose | 2. Copeland |
3. Chatton | 4. Carl Linnaeus |
In the embryos of a typical dicot and a grass, true homologous structures are:
1. | Coleorhiza and coleoptile | 2. | Coleoptile and scutellum |
3. | Cotyledons and scutellum | 4. | Hypocotyl and radical |
A human female with Turner's syndrome:
1. has 45 chromosomes with XO
2. has one additional X chromosome.
3. exhibits male characters
4. is able to produce children with normal husband.
Unisexuality of flowers prevents
1. Getionogamy but not xenogamy
2. Autogamy and geitonogamy
3. Autogamy but not geitonogamy
4. Both getionogamy and xenogamy
In genetic code dictionary, codons used to code for all the 20 essential amino acids are
1. 20
2. 60
3. 61
4. 64
Which of the following is required as inducer(s) for the expression of Lac operon?
1. lactose and galactose
2. glucose
3. galactose
4. lactose
The two alleles of a gene pair are located on:
1. | The same chromosome. |
2. | Different chromosomes. |
3. | Homologous sites on homologous chromosomes. |
4. | Homologous sites on heterologous chromosomes. |
What is the dihybrid test cross-ratio?
1. | 1 : 1 | 2. | 3 : 1 |
3. | 9 : 3 : 3 : 1 | 4. | 1 : 1 : 1: 1 |
Histones are:
1. | Positively charged and basic amino acids |
2. | Negatively charged and basic proteins |
3. | Positively charged and acidic proteins |
4. | Not found in bacteria |
Identify the plant pollinated by insects that, in many species, emit a scent of decaying flesh from the inflorescence, in order to attract insects:
1. | Yucca | 2. | Amorphophallus |
3. | Zostera | 4. | Vallisneria |
In a DNA strand, two nucleotides are linked through a ___________ linkage to form a dinucleotide.
1. 3’ – 5’ phosphodiester bond
2. 5’ – 3’ phosphodiester bond
3. 1’ N-glycosidic bond
4. Two or three hydrogen bonds
Statins produced by the yeast Monascuspurpureus have been commercialized as:
1. | hormone replacement therapy for menopausal women. |
2. | increasing receptor sensitivity in type II diabetes mellitus. |
3. | a clotting factor for the treatment of Hemophilia A. |
4. | blood-cholesterol lowering agent. |
Consider the following functions:
I: | Replication of DNA along with the synthesis of nuclear proteins such as histones |
II: | Duplication of centriole |
III: | Synthesis of energy rich compounds and proteins |
Which of the above functions are carried out by a plant cell before it divides?
1. I only | 2. I, and II |
3. I and III | 4. I, II, and III |
Match the following microorganism with product
Column -I | Column- II |
(a) Clostridium butylicum | (i) Cyclosporin A |
(b) Trichoderma polysporunt | (ii) Butyric acid |
(c) Monascus purpureus | (iii) Citric acid |
(d) Aspergillus niger | (iv) Blood cholesterol lowering agent |
(a) | (b) | (c) | (d) | |
(1) | (ii) | (i) | (iv) | (iii) |
(2) | (i) | (ii) | (iv) | (iii) |
(3) | (iv) | (iii) | (ii) | (i) |
(4) | (iii) | (iv) | (ii) | (i) |
Certain characteristic demographic features of developing countries are.
1. High fertility, high density, rapidly rising mortality rate and a very young age distribution.
2. High infant mortality, low fertility, uneven population growth and a very young age distribution.
3. High mortality, high density, uneven population growth and a very old age distribution.
4. High fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution.
A sedentary sea anemone gets attached to the sheel lining of hermit crab. The association is
1. ectoparasitism
2. symbiosis.
3. commensalism.
4. amensalism.
What is common to Pantoeaagglomerans, Microbacteriumlaevaniformans and Pseudomonas putida?
1. They are phosphate solubilising bacteria
2. They are all denitrifiers
3. They are genetically modified to fix atmospheric nitrogen
4. They are source of antibiotics effective against MRSA
Non-biodegradable pollutants are created by:
1. Nature
2. Excessive use of resources
3. Humans
4. Natural disasters
Keeping in view the fluid mosaic model for the structure of cell membrane, which one of the following statement is correct with respect to movements of lipids and proteins from one lipid monolayer to the other (described as flip flop movement) ?
1. While proteins can flip-flop, lipids cannot
2. Neither lipids nor proteins can flip-flop
3. Both lipids and proteins can flip-flop
4. While lipids can rarely flip-flop, proteins cannot
Identify the correct statements regarding G1 phase of the cell cycle:
I: | It is the post-mitotic gap phase |
II: | The cell is metabolically active and grows continuously |
III: | Cell replicates its DNA |
1. | Only II | 2. | I and II only |
3. | Only I | 4. | I, II and III |
Starting from the innermost part, the correct sequence of parts in an ovule are:
1. | egg, nucellus, embryo sac, integument |
2. | egg, embryo sac, nucellus, integument |
3. | embryo sac, nucellus, integument, egg |
4. | egg, integument, embryo sac, nucellus |
Test cross involves
1. Crossing between two genotypes with dominant trait
2. Crossing between two genotypes with recessive trait
3. Crossing the F1 hybrid with double recessive genotype
4. Crossing between two F1 hybrids.
Which of the following are the important floral rewards for animal pollinators?
1. Nectar and pollen grains
2. Floral fragrance and calcium crystals
3. Protein pellicle and stigmatic exudates
4. Colour and large size of the flower
Any mistakes during DNA replication by the enzyme would result into:
1. | Cancer | 2. | Apoptosis |
3. | Cell fragmentation | 4. | Mutation |
RNA is not the genetic material in:
1. | Tobacco mosaic virus | 2. | QB bacteriophage |
3. | HIV | 4. | Archaebacteria |
Breeding crops with higher levels of vitamins and minerals, or higher protein and healthier fats is called:
1. | Bioremediation | 2. | Biofortification |
3. | Food adulteration | 4. | Biomagnification |
What is the most important feature that enabled reptiles, birds, and mammals to become highly successful on land when compared to amphibians?
1. | Respiration by lungs | 2. | Calcareous eggs |
3. | Amnion | 4. | Scaly skin |
In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in generation, pink flowers were obtained. When pink flowers were selfed, the generation showed white, red and pink flowers. Choose the incorrect statement from the following:
1. Law of Segregation does not apply in this experiment
2. This experiment does not follow the Principle of Dominance
3. Pink colour in is due to incomplete dominance
4. Ratio of is 1/4(red):2/4(pink):1/4(white)
Air (Prevention and Control of Pollution) Act was amended in 1987 to include among pollutants
(1) Vehicular exhaust
(2) Allergy causing pollen
(3) Noise
(4) Particulates of size 2.5 micrometer or below
A temporary endocrine gland in the human body is?
1. pineal gland | 2. corpus cardiacum |
3. corpus luteum | 4. corpus allatum |
What will happen if the stretch receptors of the urinary bladder wall are totally removed?
1. Urine will not collect in the bladder
2. Micturition will continue
3. Urine will continue to collect normally in the bladder
4. There will be no micturition
What is true about RBCs in humans?
1. They carry about 20-25 percent of
2. They transport 99.5 percent of
3. They transport about 80 percent oxygen only and the rest 20 percent of it is transported in a dissolved state in blood plasma
4. They do not carry at all
Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.
Column I | Column II | |
1. | Glycines and Glucose | Small intestine and active absorption |
2. | Fructose and Na+ | Small intestine and passive absorption |
3. | Glycerol and Fatty acids | Duodenum and move as chylomicrons |
4. | Cholesterol and Maltose | Large intestine and active absorption |
The permissible use of the technique amniocentesis is for
1. detecting sex of the unborn foetus
2. artificial insemination
3. transfer of embryo into the uterus of a surrogate mother
4. detecting any genetic abnormality
Which of the following biomolecules does have phosphodiester bond ?
1. Monosaccharides in a polysaccharide
2. Amino acids in a polypeptide
3. Nucleotides in a Nucleic acid
4. Fatty acids in a diglyceride
Which one of the following living organisms completely lacks a cell wall?
1. Cyanobacteria
2. Sea- fan (Gorgonia)
3. Saccharomyces
4. Green algae
The phylum with exclusively marine animals is:
1. Porifera | 2. Cnidaria |
3. Ctenophora | 4. Platyhelminthes |
Which one of the following sets of animals belongs to a single taxonomic group?
1. Cuttlefish, Jellyfish, Silverfish, Dogfish, Starfish
2. Bat, Pigeon, Butterfly
3. Monkey, Chimpanzee, Man
4. Silkworm, Tapeworm, Earthworm
In which one of the following preparations, you are likely to come across cell junctions frequently?
1. Ciliated epithelium
2. Thrombocytes
3. Tendon
4. Hyaline cartilage
Match the following with reference to Cockroach and choose the correct option
A. Phallomere | i. Chain of developing ova |
B. Gonopore | ii. Bundles of sperm |
C. Spermatophore | iii. Opening of the ejaculatory duct |
D. Ovarioles | iv. The external genitalia |
Options:
A | B | C | D | |
1. | iii | iv | ii | i |
2. | iv | iii | ii | i |
3. | iv | ii | iii | i |
4. | ii | iv | iii | i |
The first clinical gene therapy was done for the treatment of:
1. | AIDS |
2. | Cancer |
3. | Cystic fibrosis |
4. | SCID (Severe Combined Immuno Deficiency) resulting from deficiency of ADA |
Which of the following is not a function of spleen?
1. | It acts as a filter of the blood by trapping blood-borne microorganisms |
2. | It acts as a large reservoir of RBCs |
3. | It filters our old RBCs |
4. | It continues to form RBCs for a few years after birth |
A method used only for transforming animal cells is:
1. | Biolistics | 2. | Microinjection |
3. | Use of virus | 4. | Agrobacterium mediation |
Which one of the following statements is correct?
1. Neurons regulate endocrine activity, but not vice versa.
2. Endocrine glands regulate neural activity, and nervous system regulates endocrine glands.
3. Neither hormones control neural activity nor do the neurons control endocrine activity.
4. Endocrine glands regulate neural activity, but not vice versa.
The most active phagocytic white blood cells are
1. Neutrophils and monocytes
2. Neutrophils and eosinophils
3. Lymphocytes and macrophages
4. Eosinophils and lymphocytes
Most abundant organic compound on earth is
1. Cellulose
2. Protein
3. Lipids
4. Steroids
In a man, abducens nerve is injured. Which one of the following functions will be affected?
1. Swallowing
2. Movement of the eyeball
3. Movement of the neck
4. Movement of the tongue
Which one of the following items gives its correct total number?
1. Cervical vertebrae in humans - 8
2. Floating ribs in humans - 4
3. Amino acids found in proteins - 16
4. Types of diabetes - 3
The net pressure gradient that causes the fluid to filter out of the glomeruli into capsule is
1. 20 mm Hg
2. 50 mm Hg
3. 75 mm Hg
4. 30 mm Hg
The actions of adrenaline will include all the following except:
1. Piloerection
2. Pupilary dilation
3. Glycogenesis
4. Positive ionotropic and chronotropic effect on heart
The muscular activities of different parts ofthe alimentary canal can also be moderated by neural mechanisms that involve:
I. local mechanisms
II. through CNS
1. I only
2. II only
3. Both I and II
4. Neither I nor II
The spermatids are transformed into spermatozoa by a process called:
1. | Spermiation | 2. | Spermatocytogenesis |
3. | Spermiogenesis | 4. | Spermatolysis |
During the follicular phase of the menstrual cycle, which of the following occur?
I: | The primary follicle grows and becomes a fully mature Graafian follicle. |
II: | The endometrium of the uterus regenerates through proliferation. |
1. | Only I | 2. | Only II |
3. | I and II | 4. | None |
A major non-contraceptive advantage of male barrier contraceptives is that they prevent:
1. | Cancer breast | 2. | STI |
3. | Ectopic pregnancies | 4. | Menstrual irregularities |
In the ear, the utricle and the saccule are located in the:
1. cochlea | 2. semicircular canal |
3. spiral organ (organ of Corti) | 4. vestibule |
Visual reflexes are coordinated by the part of the human brain known as the:
1. cerebellum
2. superior colliculus
3. inferior colliculus
4. cerebral peduncles
During ventricular contraction in a cardiac cycle:
1. the AV valves close earlier than the opening of semi lunar vales
2. the AV valves close earlier than the closure of semi lunar vales
3. the AV valves close later than the opening of semi lunar vales
4. the closure of AV valves and opening of semi lunar valves occur simultaneously
A person suffers punctures in his chest cavity in an accident, without any damage to the lungs. It’s effect could be:
1. A decreased respiratory rate
2. Absence of breathing on the affected side
3. Hyper inflation of the lung on affected side
4. An increase in the partial pressure of oxygen in deoxygenated blood
Protonephridia are the excretory structures in all the following except:
1. Planaria | 2. Rotifers |
3. Amphioxus | 4. Prawns |
A flat bone present on the ventral midline of thorax is called as:
1. | Hyoid | 2. | Clavicle |
3. | Sternum | 4. | Vertebral body |
Following statements describe the characteristics of the enzyme Restriction Endonuclease. Identify the incorrect statement
1. The enzyme recognizes a specific palindromic nucleotide sequence in the DNA
2. The enzyme cuts DNA molecules at identified position within the DNA
3. The enzyme binds DNA at specific sites and cuts only one of the two strands
4. The enzyme cuts the sugar-phosphate backbone at specific sites on each strand
Meiotic division of the secondary oocyte is completed:
(1) At the time of copulation
(2) After zygote formation
(3) At the time of fusion of a sperm with an ovum
(4) Prior to ovulation
Match the following columns and select the correct option :
Column - I Column - II
(i) Typhoid (a) Haemophilus influenzae
(ii) Malaria (b) Wuchereria bancrofti
(iii) Pneumonia (c) Plasmodium vivax
(iv) Filariasis (d) Salmonella typhi
(1) (i)-(d), (ii)-(c), (iii)-(a), (iv)-(b)
(2) (i)-(c), (ii)-(d), (iii)-(b), (iv)-(a)
(3) (i)-(a), (ii)-(c), (iii)-(b), (iv)-(d)
(4) (i)-(a), (ii)-(b), (iii)-(d), (iv)-(c)
The laws and rules to prevent unauthorized exploitation of bio-resources are termed as -
(1) Biopatenting
(2) Bioethics
(3) Bioengineering
(4) Biopiracy
In mammalian eye, the 'fovea' is the center of the visual field where
1. high density of cones occur, but has no rods
2. the optic nerve leaves the eye
3. only rods are present
4. more rods than cones are found
Sertoli cells are found in
1. ovaries and secrete progesterone
2. adrenal cortex and secrete adrenalin
3. seminiferous tubules and provide nutrition to germ cells
4. pancreas and secrete cholecystokinin
All veins carry deoxygenated blood except
1. pulmonary vein
2. hepatic vein
3. hepatic portal vein
4. renal vein
Sliding filament theory can be best explained as
1. when myofilaments slide pass each other, actin filaments shorten while myosin filaments do not shorten
2. actin and myosin filaments shorten and slide pass each other
3. actin and myosin filaments do not shorten but rather slide pass each other
4. when myofilaments slide pass each other, myosin filaments shorten while actin filaments do not shorten
If the required gene has been isolated by shotgun approach, care must be taken to:
1. | cut the plasmid with a different restriction enzyme than that used to obtain the donor gene |
2. | cut the plasmid with the same restriction enzyme that was used to obtain the donor gene |
3. | avoid cutting the plasmid |
4. | cut the plasmid with two different restriction enzymes |
The rate of enzyme action decreases at higher temperature [after a certain value] because the increased heat
1. changes the pH of the system
2. alters the active site of the enzyme
3. neutralizes the acids and bases in the system
4. increases the concentration of the enzyme
When two unrelated individuals or lines are crossed, the performance of F1 hybrid is often superior to both is parents. This phenomenon is called:
1. Heterosis
2. Transformation
3. Splicing
4. Metamorphosis
According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
1. | Oxygen | 2. | Hydrogen |
3. | Water vapour | 4. | Methane |
Identify a non-infectious disease amongst the following:
1. | Malaria | 2. | Hemophilia |
3. | AIDS | 4. | Hepatitis |
The set of all genes, or genetic information, in a unit of evolution is called the :
1. genotype
2. polymorphism
3. multiple allelism
4. gene pool
Generally, the fossils are found in:
1. Igneous rocks
2. Sedimentary rocks
3. Metamorphic rocks
4. Deeper rocks
Identify the incorrect fact regarding the Neanderthal man:
1. Cranial capacity of around 1400 cc
2. Lived in East and Central Africa
3. Used hides to protect their bodies
4. Buried their dead
Bartholin’s glands are situated
1. On the sides of the head of some amphibians.
2. At the reduced tail end of birds.
3. On either side of vagina in humans.
4. On either side of vas deferens in humans.
Passive filling accounts for about what percent of ventricular filling?
1. | 30 | 2. | 50 |
3. | 70 | 4. | 90 |
The membranous connective tissue closest to the individual muscle fiber in a skeletal muscle is called as:
1. | aponeurosis | 2. | epimysium |
3. | perimysium | 4. | endomysium |