Potometer works on the principle of
1. Potential difference between the tip of the tube and that of the plant
2. Amount of water absorbed equals the amount transpired
3. Osmotic pressure
4. Root pressure
In section 11.1.2, NCERT states that a concentration gradient needs to be present in spite of the fact that facilitated diffusion is facilitated by a carrier. Why is it so?
1. These protein carriers have ATPase activity.
2. These protein carriers can not move in the membrane.
3. These protein carriers can not establish concentration gradients.
4. These protein carriers can provide only symport with the use of external energy.
Sulphur is an important nutrient for optimum growth and productivity in:
1. pulse crops
2. cereals
3. fibre crops
4. oilseed crops
Read the following four statements a, b, c and d and select the right option having both correct statements:
(a) Z scheme of light reaction takes place in presence of PS I only
(b) Only PS I is functional in cyclic photophosphorylation
(c) Cyclic photophosphorylation results into synthesis of ATP and NADPH
(d) Stroma lamellae lack PS II as well as NADP reductase
Options :
1. (c) and (d)
2. (b) and (d)
3. (a) and (b)
4. (b) and (c)
The pathway:
1. is common to all plants
2. takes place in mesophyll cells in plants
3. takes place in bundle sheath cells in plants
4. does not take place in CAM plants
Which of the following is the connecting link between glycolysis and Kreb's cycle?
1. | Acetyl Co-A | 2. | Oxalosuccinic acid |
3. | Pyruvic acid | 4. | Citric acid |
Oxygen drives the process of ATP production via ETS. The best explanation for this would be that oxygen:
1. is needed at the end of the aerobic respiration
2. is the terminal electron donor
3. is not required in the glycolytic pathway
4. acts as the final hydrogen acceptor
The term synergistic action of hormones refers to
1. When two hormones act together but bring about opposite effects.
2. When two hormone act together and contribute to the same function.
3. When one hormone affects more than one function.
4. When many hormones bring about any one function.
High altitude acclimatization in humans include all the following except:
1. | Increased RBC production |
2. | Increased breathing rate |
3. | Increased heart rate |
4. | Increased binding affinity of haemoglobin |
Which one of the following is an endangered plant species in India?
1. | Rauwolfia serpentine | 2. | Santalum album (Sandalwood) |
3. | Cycasbeddonel | 4. | All of these |
What will happen to a well-growing herbaceous plant in the forest if it is transplanted outside the forest in a park?
1. | It will grow normally |
2. | It will grow well because it is planted in the same locality |
3. | It may not survive because of changes in its microclimate |
4. | It grows very well because the plant gets more sunlight |
The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:
1. Eubacteria | 2. Halophiles |
3. Thermoacidophiles | 4. Methanogens |
Ovary is one chambered but it becomes two chambered due to the formation of a false septum in:
1. | Mustard and Argemone | 2. | Argemone and Dianthus |
3. | Mustard and Primrose | 4. | Argemone and Primrose |
In general, the functions of the root system of a plant would include all the following except:
1. Absorption of water and minerals from the soil
2. Providing proper anchorage to the plant parts
3. Synthesis of reserve food material
4. Synthesis of plant growth regulators
The beginning of diplotene is recognized by:
I: | dissolution of the synaptonemal complex |
II: | the tendency of recombined homologues of bivalents to separate |
III: | tetrads becoming clearly visible |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II, and III |
Epiblema of roots is equivalent to
1. | Pericycle | 2. | Endodermis |
3. | Epidermis | 4. | Stele |
Phylogenetic classification is based on:
1. | Morphological similarities | 2. | Physiological similarities |
3. | Reproductive similarities | 4. | Evolutionary relationships |
Which of the following regarding Cycas is incorrect?
1. Pinnate leaves persist for a few years
2. Male and female cones are born on different plants
3. Coralloid roots are in association with cynobacteria
4. Homosporous gymnosperm
The taxon ‘Division’ in plant taxonomy is used as a substitute for which of the following taxonomic categories in animal taxonomy?
1. | Phylum | 2. | Class |
3. | Order | 4. | Family |
Bacillus thuringiensis (Bt) strains have been used for designing novel
1. Bio Insecticidal plants
2. Biomineralization processes
3. Biofertilizers
4. Bio-metallurgical techniques
A gene showing codominance has:
1. | alleles tightly linked on the same chromosome |
2. | alleles that are recessive to each other |
3. | both alleles independently expressed in the heterozygote |
4. | one allele dominant on the other |
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is:
1. | Cuticle | 2. | Sporopollenin |
3. | Lignin | 4. | Cellulose |
A sequential expression of a set of human genes occurs when a steroid molecule binds to
1. mRNA
2. DNA sequence
3. tRNA
4. Ribosome
In true breeding, the allelic pair of genes are:
1. | Homologous | 2. | Linked |
3. | Stable | 4. | Homozygous |
The UTR [untranslated regions] in an mRNA:
1. | Are present only at 5’ end and are not required for efficient translation |
2. | Are present only at 3’ end and are not required for efficient translation |
3. | Are present at both 5’ and 3’ends and are not required for efficient translation |
4. | Are present at both 5’ and 3’ ends and are required for an efficient translation process |
The majority of water plants like water hyacinth and water lily are pollinated by:
1. | Water | 2. | Wind |
3. | Insects | 4. | Both 2 and 3 |
Whether a pollen grain will be able to germinate on a stigma is primarily decided by:
1. | The stage at which the pollen is shed |
2. | Recognition by the stigma |
3. | Maturity of the egg cell in the embryosac |
4. | Environmental conditions |
Mating between black rats of identical genotype produced offspring as follows: 14 cream colored, 47 black and 19 albino. This ratio can be explained if the pheneomenon exhibited here is:
1. Recessive epistasis
2. Polygenic inheritance
3. Multiple allelism
4. Incomplete penetrance
The difference between ATP and the nucleoside triphosphates used during DNA synthesis is that:
1. | The nucleoside triphosphates have the sugar deoxyribose; ATP has the sugar ribose. |
2. | The nucleoside triphosphates have two phosphate groups; ATP has three phosphate groups. |
3. | ATP contains three high-energy bonds; the nucleoside triphosphates have two. |
4. | ATP is found only in human cells; the nucleoside triphosphates are found in all animal and plant cells. |
Consider the two statements:
I: | Indirectly, BOD is a measure of the organic matter present in the water. |
II: | The greater the BOD of wastewater, the more its polluting potential. |
1. Both I and II are correct
2. Only I is correct
3. Only II is correct
4. Both I and II are incorrect
The phase of mitosis in which the spindle fibers break apart, two new nuclear membranes begin to form, and the chromosomes disperse into chromatin is
1. | metaphase | 2. | telophase |
3. | anaphase | 4. | prophase |
Algal cell walls are made up of:
1. Cellulose, Galactans, Mannans and Minerals
2. Cellulose, Hemicellulose, Pectins and Proteins
3. Cellulose, Pectins, Mannans and Minerals
4. Cellulose, Hemicellulose, Mannans and Pectins
Which of the following statement about inclusion bodies IS incorrect ?
1. These are involved in ingestion of food particles.
2. They lie free in the cytoplasm.
3. These represent reserve material in cytoplasm.
4. They are not bound by any membrane.
In a mitotic cycle, the correct sequence of phases is
(1) S, , , M
(2) , S, , M
(3) M, , , S
(4) , , S, M
The term 'Nuclein' for the genetic material was used by :
(1) Franklin
(2) Mischer
(3) Chargaff
(4) Mendel
What type of human population is represented by the following age pyramid?
1. Expanding population
2. Vanishing population
3. Stable population
4. Declining population
Among the following, where do you think the process of decomposition would be the fastest?
1. | Tropical rain forest | 2. | Antarctic |
3. | Dry arid region | 4. | Alpine region |
Biodiversity act of India was passed by Parliament in
1. 1992
2. 1996
3. 2000
4. 2002
The loudness of a sound that a person can withstand without discomfort is about:
1. | 150 dB | 2. | 215 dB |
3. | 30 dB | 4. | 80 dB |
Ribosomal RNA is actively synthesized in
1. Lysosomes
2. Nucleolus
3. Nucleoplasm
4. Ribosomes
Identify the stage of mitosis shown in the given diagram:
|
Which is wrongly matched?
1. Agave – bulbils
2. Penicillium – conidia
3. Water Hyacinth – runner
4. Bryophyllum – leaf buds
Linkage map of X-chromosome of fruitfly has 66 map units with yellow body gene(y) at one end & bobbed hair (b) at the other. The recombination frequency between y and b gene would be
1. 66%
2. > 50%
3. 50%
4. 100%
Which one of the following cannot be explained on the basis of Mendel’s Law of Dominance
1. Out of one pair of factors one is dominant and the other recessive
2. Alleles do not show any blending and both the characters recover as such in F2 generation
3. Factors occur in pairs
4. The discrete unit controlling a particular character is called a factor
Which of the following statements is not correct?
1. Some reptiles have also been reported as pollinators in some plant species. ,
2. Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same
species grows into the style.
3. Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers.
4. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with
those of the pistil
Which of the following codons has a dual role in the genetic code?
1. | AUG | 2. | GUG |
3. | CUG | 4. | UUG |
Which of the following RNAs plays both structural and catalytic roles?
1. | mRNA | 2. | tRNA |
3. | rRNA | 4. | miRNA |
Identify incorrectly matched pair:
Crop |
Variety |
|
1. |
Brassica |
Pusa Swarnim |
2. |
Okra |
Pusa Gaurav |
3. |
Chilli |
Pusa Sadabahar |
4. |
Cauliflower |
Pusa Shubhra |
What type of pollination takes place in Vallisneria ?
1. Pollination occurs in submerged condition by water.
2. Flowers emerge above surface of Water and pollination occurs by insects.
3. Flowers emerge above water surface and pollen is carried by wind.
4. Male flowers are carried by water currents to female flowers at surface of water.
Which of the following statements about ozone is correct ?
1. Tropospheric ozone protects us from UV radiations.
2. Stratospheric ozone is 'bad'.
3. Tropospheric ozone is 'good'
4. Stratospheric ozone protects us from UV radiations.
Select the answer which correctly matches the endocrine gland with the hormone it secretes and its function/deficiency symptom
Endocrine gland | Hormone | Function/deficiency symptoms | |
1. | Anterior pituitary | Oxytocin | Stimulates uterus contraction during child birth |
2. | Posterior pituitary | Growth Hormone (GH) | Over-secretion stimulates abnormal growth |
3. | Thyroid gland | Thyroxine | Lack of iodine |
4. | Corpus luteum | Testosterone | Stimulates spermatogenesis |
Fertilisation in humans is practically feasible only if:
1. | the ovum and sperms are transported simultaneously to the ampullary-isthmic junction of the fallopian tube. |
2. | the ovum and sperms are transported simultaneously to the ampullary-isthmic junction of the cervix. |
3. | the sperms are transported into the cervix within 48 hrs of the release of the ovum in the uterus. |
4. | the sperms are transported into the vagina just after the release of the ovum in the fallopian tube. |
Respiration is controlled by
1. medulla oblongata
2. cerebellum
3. hypothalamus
4. cerebrum
Which one of the following pairs of animals comprises ‘jawless fishes’?
1. Guppies and hag fishes
2. Lampreys and eels
3. Mackerels and Rohu
4. Lampreys and hag fishes
Which of the following statements is not true about Nematodes?
1. They are bilaterally symmetrical, un-segmented worms
2. They are covered with a flexible, thick cuticle that is molted four times as they grow
3. They possess cilia or flagella on their reproductive cells
4. They possess a hydrostatic skeleton
Smooth muscles are
1. voluntary, spindle-shaped, uninucleate
2. involuntary, fusiform, non-striated
3. voluntary, multinucleate, cylindrical
4. involuntary, cylindrical, striated
A cell isolated from a four-cell stage larva can develop into a complete animal in:
1. Snail
2. Earthworm
3. Sea urchin
4. Drosophila
Match each item in Column I [Type of cartilage] with one in Column II [Location] and select the correct answer from the codes given:
COLUMN I |
COLUMN II |
||
A |
Hyaline |
a |
Intervertebral discs |
B |
Fibrous |
b |
Pinna, epiglottis |
C |
Elastic |
c |
Sternum, hyoid, ribs |
Codes
A B C
1. a b c
2. c b a
3. c a b
4. a c b
Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?
1. Valium
2. Morphine
3. Hashish
4. Amphetamines
Genetically engineered microorganism used successfully in bioremediation of oil spills is
1. Trichoderma
2. Xanthomonas
3. Bacillus
4. Pseudomonas putida
The linking of antibiotic resistance gene with the plasmid vector became possible due to
1. DNA polymerase
2. Exonucleases
3. DNA ligase
4. Endonucleases
Nicotine functions as a stimulant because it stimulates the release of:
1. | Adrenaline | 2. | Thyroxine |
3. | Dopamine | 4. | Acetylcholine |
The transgenic cow, Rosie, produced milk that:
1. | Contained human beta lactalbumin |
2. | contained interferons to treat viral infections |
3. | contained Alpha – 1 antitrypsin |
4. | Is protein enriched |
If one needs to derive a cDNA of human insulin, which cells should be taken up for extraction?
1. | Any cell of the human body as the DNA is the same in all cells |
2. | Any nucleated cell of the human body |
3. | Beta cells of islets of Langerhans of the human pancreas |
4. | WBCs |
Gastric juice of infants contains
1. Maltase, pepsinogen, rennin
2. Nuclease, pepsinogen, lipase
3. Pepsinogen, lipase, rennin
4. Amylase, rennin, pepsinogen
Embryo with more than 16 blastomeres formed due to in vitro fertilisation is transferred into:
1. | Fallopian tube | 2. | Fimbriae |
3. | Cervix | 4. | Uterus |
Which of the following hormones can play a significant role in osteoporosis?
1. Estrogen and Parathyroid hormone
2. Progesterone and Aldosterone
3. Aldosterone and Prolactin
4. Parathyroid hormone and Prolactin
Which one of the following human organs is often called the "graveyard" of RBCs?
1. Spleen
2. Liver
3. Gall bladder
4. Kidney
The unique properties of each amino acid is determined by its particular :
1. R group
2. amino group
3. kinds of peptide bonds
4. number of bonds to other amino acids
Which of the following regions of the brain is incorrectly paired with its function?
1. Medulla oblongata-homeostatic control
2. Cerebellum-language comprehension
3. Corpus callosum-communication between the left and right cerebral cortices
4. Cerebrum-calculation and contemplation
Which one of the following joints would allow no movement?
1. Ball and socket joint
2. Fibrous joint
3. Cartilaginous joint
4. Synovial joint
In mammals, which blood vessel would normally carry the largest amount of urea?
1. Renal vein
2. Dorsal aorta
3. Hepatic vein
4. Hepatic portal vein
The functions of insulin do not include:
1. Glycogenesis
2. Gluconeogenesis
3. Increased cellular glucose uptake
4. Increased cellular glucose utilization
The egestion of faeces to the outside through the anal opening (defaecation) is:
1. a voluntary process and is carried out by a mass peristaltic movement.
2. an involuntary process and is carried out by a mass peristaltic movement.
3. a voluntary process and is carried out by an anteperistaltic movement.
4. a voluntary process and is carried out by a peristaltic movement.
Which hormone is mainly secreted by the developing follicles during the proliferative phase of the menstrual cycle?
1. | LH | 2. | FSH |
3. | Progesterone | 4. | Estrogen |
The introduction of sex education in schools in India should be encouraged. This is because:
I: | This will discourage children from believing in misconceptions about sex-related aspects |
II: | Sex education will help adolescents to lead a reproductively healthy life |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
Which of the following is not produced in the woman only during pregnancy?
1. | hCG | 2. | hPL |
3. | Relaxin | 4. | Oxytocin |
Sympathetic stimulation leads to all the following except:
1. Contraction of piloerector muscle
2. Dilation of pupil
3. Decreased peristalsis in gut
4. Bronchoconstriction
The auditory receptors in the human ear will be:
1. Organ of Corti | 2. Hair cells |
3. Macula | 4. Cupula |
Formed elements and clotting factors are removed from the blood. The remaining fluid will be called as:
1. Plasma | 2. Lymph |
3. Serum | 4. Antiserum |
Incomplete cartilaginous rings are seen in the walls of all the following except:
1. Trachea | 2. Primary bronchus |
3. Tertiary bronchus | 4. Respiratory bronchiole |
What is the number of times that the human kidneys can maximally concentrate the initial filtrate?
1. | 2 | 2. | 4 |
3. | 6 | 4. | 8 |
Identify the incorrect statement regarding proximal convoluted tubule:
1. It is lined by simple cuboidal brush bordered epithelium
2. It reabsorbs 70-80 % of electrolytes and water and nearly all nutrients
3. In juxta-medullary nephrons, it extends deep into the renal medulla
4. It secretes hydrogen ions, ammonia and reabsorbs bicarbonate ions to maintain the ionic and pH balance of the body fluids
All the following are cranial bones except:
1. | Ethmoid | 2. | Sphenoid |
3. | Temporal | 4. | Zygomatic |
Identify the statement which is incorrect.
1. Sulphur is an integral part of cysteine.
2. Glycine is an example of lipids.
3. Lecithin contains a phosphorus atom in its structure.
4. Tyrosine possesses an aromatic ring in its structure.
Which one of the following does not act as a neurotransmitter?
1. Acetylcholine
2. Epinephrine
3. Norepinephrine
4. Cortisone
Column I | Column II | |
1. | Ovulation | LH and FSH attain peak levels and sharp fall in the secretion of progesterone |
2. | Proliferative phase | Rapid regeneration of myometrium and maturation of Graafian follicle |
3. | Development of corpus luteum | Secretory phase and increased secretion of progesterone |
4. | Menstruation | Breakdown of myometrium and ovum not fertilized |
An amino acid that is negative charged amongst the following will be:
1. Glutamic acid | 2. Lysine |
3. Arginine | 4. Histidine |
In agarose gel electrophoresis, DNA molecules are separated on the basis of their:
1. | Charge only | 2. | Size only |
3. | Charge-to-size ratio | 4. | All of the above |
Which of the following is also sometimes called as mosquito fish?
1. | Bombay duck | 2. | Gambusia |
3. | Pacific salmon | 4. | Pomfret |
Which of the following is not an advantage of artificial insemination in cattle?
1. | Increased efficiency of bull usage |
2. | Increased genetic variability in the population |
3. | Increased potential for genetic selection |
4. | Reduced disease transmission |
A population geneticist finds that a new allele in a population has suddenly increased in frequency. Most likely this allele is:
1. mutating rapidly
2. flowing with emigrants
3. strongly selected for
4. a product of assortative mating
The loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population is called as:
1. | the bottleneck effect | 2. | the founder effect |
3. | assortative mating | 4. | random mating |
Population that experience genetic drift most commonly are:
1. isolated
2. small in number
3. mobile
4. closely adapted to their environment
Which one of the following statements is false in respect of viability of mammalian sperm?
1. Viability of sperm is determined by its motility.
2. Sperms must be concentrated in a thick suspension.
3. Sperms are viable for only up to 24 hours.
4. Survival of sperm depends on the pH of the medium and is more active in alkaline medium.
Pars distalis is:
1. the posterior lobe of pituitary made of neural tissue
2. the well developed intermediate lobe of pituitary in humans
3. the major part of the adenohypophysis
4. the connection between anterior pituitary and hypothalamus
State of the heart when it is not pumping blood effectively to meet needs of body is called as:
1. Heart attack | 2. Heart block |
3. Cardiac arrest | 4. Heart failure |
The smallest, functional unit of contraction is the:
1. | muscle fiber | 2. | sarcomere |
3. | myofilament | 4. | myofibril |
The amount of carbon dioxide that can diffuse through the diffusion membrane is much higher compared to that of oxygen because:
1. | the gradient across the membrane is much higher for carbon dioxide |
2. | carbon dioxide is more toxic than oxygen |
3. | solubility of carbon dioxide is much higher than that of oxygen |
4. | carbon dioxide has more affinity for hemoglobin than that of oxygen |
Which of the following refer to correct example(s) of organisms which have evolved due to changes in environment brought about by anthropogenic action?
(a) Darwin's Finches of Galapagos islands
(b) Herbicide resistant weeds
(c) Drug resistant eukaryotes
(d) Man-created breeds of domesticated animals like dogs
(1) (a) and (c)
(2) (b), (c) and (d)
(3) only (d)
(4) only (a)