Statement I: | Parasitism has evolved in many taxonomic groups from plants to higher vertebrates. |
Statement II: | Many parasites have evolved to be host-specific and both tend to co-evolve. |
Statement III: | All parasites have only one primary and one intermediate host. |
Statement IV: | Only a few of the parasites harm their hosts. |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
Match the following columns and select the correct option:-
Column I |
Column II |
||
(a) |
Dragonflies |
(i) |
Biocontrol agents of several plant pathogens |
(b) |
Bacillus thuringiensis |
(ii) |
Get rid of mosquitoes |
(c) |
Glomus |
(iii) |
Narrow spectrum insecticidal applications |
(d) |
Baculoviruses |
(iv) |
Biocontrol agents of lepidopteran plant pests |
(v) |
Absorb phosphorus from soil |
Options: | (a) | (b) | (c) | (d) |
1. | (iii) | (v) | (iv) | (i) |
2. | (ii) | (i) | (iii) | (iv) |
3. | (ii) | (iii) | (iv) | (v) |
4. | (ii) | (iv) | (v) | (iii) |
Consider the following statements:
I: | RNA is the genetic material of the QB bacteriophage. |
II: | DNA chemically is less reactive and more stable than RNA. |
III: | Viruses having RNA genomes and shorter life spans mutate & evolve slowly. |
Which of the above statements are true?
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II, and III |
For the assimilation of one CO2 molecule in C3 plants, the energy required in the form of ATP and NADPH2 is:
1. 2 ATP & 2 NADPH2
2. 5 ATP & 3 NADPH2
3. 3 ATP & 2 NADPH2
4. 18 ATP & 12 NADPH2
Which of the following is not a character of Ascomycetes?
1. | Mycelium is unbranched and septate |
2. | Asexual spores conidia are produced exogenously |
3. | Sexual spores called ascospores are produced endogenously |
4. | Conidia on germination produce mycelium |
1. | They are important decomposers. |
2. | They are helpful in making curd from milk, production of antibiotics and fixing nitrogen in legume roots. |
3. | Some are pathogens causing damage to human beings, crops, farm animals and pets. |
4. | Almost all help in recycling nutrients like nitrogen, phosphorus, iron and sulphur. |
Phycomycetes | Basidiomycetes | ||
1. | Mycelium | Branched and septate | Aseptate and coenocytic |
2. | Asexual spores | Zoospores or aplanospores | Generally not found |
3. | Notable examples | Bread mould and Albugo | Rust and Smut fungi |
4. | Dikaryon stage |
Not seen | Present |
Assertion (A): | The spread of living pteridophytes is limited and restricted to narrow geographical regions. |
Reason (R): | Pteridophytes are terrestrial plants that possess vascular tissues – xylem and phloem. |
1. | Both (A) and (R) are True and the (R) correctly explains (A) |
2. | (A) is True but (R) is False |
3. | (A) is False but (R) is True |
4. | Both (A) and (R) are True but (R) does not correctly explain (A) |
1. | cells that mature into secondary xylem towards pith and into secondary phloem towards periphery |
2. | cells that mature into secondary xylem towards periphery and into secondary phloem towards pith |
3. | cells that mature into primary xylem towards pith and into primary phloem towards periphery |
4. | cells that mature into primary xylem towards periphery and into primary phloem towards pith |
A bud is present in:
I: | the axil of petiole in simple leaf |
II: | the axil of petiole in compound leaf |
III: | the axil of leaflets of the compound leaf |
1. Only I and II are correct
2. Only I is correct
3. Only II and III are correct
4. Only II is correct
Which one of the following is not an inclusion body found in prokaryotes?
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 |
A dioecious flowering plant prevents both:
1. Autogamy and geitonogamy
2. Geitonogamy and xenogamy
3. Cleistogamy and xenogamy
4. Autogamy and xenogamy
1. | Canna | 2. | Pea |
3. | Mustard | 4. | Datura |
Column I | Column II | ||
A | RNA polymerase I | P | hnRNA |
B | RNA polymerase II | Q | 5SrRNA |
C | RNA polymerase III | R | 5.8SrRNA |
A | B | C | |
1. | R | P | Q |
2. | P | Q | R |
3. | Q | R | P |
4. | R | Q | P |
The figure given below shows the conversions of a substrate into product by an enzyme. In which one of the four options (1-4), the components of the reaction labelled as A, B, C and D are identified correctly:
Options
A | B | C | D | |
1. | Transition state |
Potential energy |
Activation energy without enzyme |
Activation energy with enzyme |
2. | Potential energy |
Transition state |
Activation energy with enzyme |
Activation energy without enzyme |
3. | Activation energy with enzyme |
Transition state |
Activation energy without enzyme |
Potential energy |
4. | Potential energy |
Transition state |
Activation energy without enzyme |
Activation energy with enzyme |
The plant hormone used to destroy weeds in a field is:
1. 2, 4-D
2. IBA
3. IAA
4. NAA
1. | Male thallus of Marchantia and Female thallus of Marchantia |
2. | Female thallus of Marchantia and Male thallus of Marchantia |
3. | Male thallus of Funaria and Female thallus of Funaria |
4. | Female thallus of Funaria and Male thallus of Funaria |
I: | Pacific salmon and bamboo breed many times during their lifetimes. |
II: | Birds and mammals breed many times during their lifetimes and produce a small number of large-sized offspring. |
III: | Oysters and pelagic fishes produce a large number of small-sized offspring. |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
In a cereal grain, the single cotyledon of the embryo is represented by:
1. coleorhiza
2. scutellum
3. prophyll
4. coleoptiles
The inhibition of succinic dehydrogenase by malonate is an example of:
1. Non-competitive reversible inhibition
2. Non-competitive irreversible inhibition
3. Competitive inhibition
4. Allosteric inhibition
One scientist cultured Cladophora in a suspension of Azotobacter and illuminated the culture by splitting light through a prism. He observed that bacteria accumulated mainly in the region of:
1. Violet and green light
2. Indigo and green light
3. Orange and yellow light
4. Blue and red light
The meristem that helps grasses regenerate parts removed by the grazing herbivores is the:
1. | Shoot apical meristem | 2. | Root apical meristem |
3. | Intercalary meristem | 4. | Lateral meristem |
1. | Carboxylation → Reduction →Regeneration |
2. | Carboxylation → Regeneration →Reduction |
3. | Regeneration → Reduction → Carboxylation |
4. | Reduction → Regeneration → Carboxylation |
Which of the following PGR is present in coconut milk which is used in tissue culture?
1. Cytokinin
2. Auxin
3. Gibberellin
4. Ethylene
The outer hard layer of the pollen wall is made up of:
1. | Callose, which is easily digested by enzymes |
2. | Sporopollenin, which is resistant to all enzymes |
3. | Hemicellulose, which is difficult to digest by enzymes |
4. | Calcium pectate, which is easily digested by enzymes |
Function of filiform apparatus is to:
1. | Recognize the suitable pollen at the stigma |
2. | Stimulate division of generative cell |
3. | Producer nectar |
4. | Guide the entry of the pollen tube |
Column I | Column II | ||
A | Ashwagandha | P | Ornamental |
B | Petunia | Q | Dilation of pupil |
C | Fumigatory | R | Medicine |
D | Atropa | S | Tobacco |
A | B | C | D | |
1. | R | P | S | Q |
2. | R | S | P | Q |
3. | P | R | S | Q |
4. | Q | P | R | S |
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): | Heterospory in some pteridophytes paved the way for the evolution of seeds in higher plants. |
Reason (R): | The megaspores and microspores in heterosporous ferns give rise to female and male gametophytes respectively. |
In the light of the above statements choose the correct answer from the options given below:
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
1. | Eight molecules of NADH + H+ |
2. | Two molecules of FADH2 |
3. | Two molecules of ATP |
4. | Four molecules of carbon dioxide |
The cell cycle in a typical eukaryotic cell is divided into:
1. Five phases
2. Four phases
3. Three phases
4. Two phases
Identify the correct statement:
1. | The coding strand in a transcription unit is copied to an mRNA. |
2. | Split gene arrangement is characteristic of prokaryotes. |
3. | In capping, methylguanosine triphosphate is added to the 3' end of hnRNA. |
4. | RNA polymerase binds with the Rho factor to terminate the process of transcription in bacteria. |
Statement I: | are membrane bound vesicular structures formed in the rough endoplasmic reticulum. |
Statement II: | are very rich in almost all types of hydrolytic enzymes optimally active at the basic pH. |
1. | Statement I is incorrect; Statement II is incorrect |
2. | Statement I is incorrect; Statement II is correct |
3. | Statement I is correct; Statement II is incorrect |
4. | Statement I is correct; Statement II is correct |
The thalloid body of a slime mould (Myxomycetes) is known as:
1. protonema
2. Plasmodium
3. fruiting body
4. mycelium
The three steps of decomposition occur:
1. sequentially, with catabolism being the last step.
2. sequentially, with leaching being the last step.
3. simultaneously.
4. sequentially, but not in a particular order.
I: | It usually develops in the cortex region and is a couple of layers thick. |
II: | It cuts off cells on both sides where the inner cells differentiate into cork and the outer cells differentiate into secondary cortex. |
I: | Polygenic inheritance takes into account the influence of the environment. |
II: | In a polygenic trait, the phenotype reflects the contribution of each allele, i.e., the effect of each allele is additive. |
III: | The normal distribution curve is bell-shaped in polygenic inheritance. |
IV: | It is also known as quantitative inheritance. |
1. | 0 | 2. | 1 |
3. | 3 | 4. | 4 |
A species whose distribution is restricted to a small geographical area because of the presence of a competitively superior species, is found to expand its distributional range dramatically when the competing species is experimentally removed. This is called:
1. | Competitive Exclusion | 2. | Competitive Release |
3. | Competitive Supremacy | 4. | Competitive Inclusion |
I: | Most of the developing and underdeveloped world is rich financially, but poor in biodiversity and traditional knowledge. |
II: | Most of the industrialised nations are rich in biodiversity and traditional knowledge related to bio-resources but poor in biotechnology. |
1. | Statement I is correct. |
2. | Statement II is correct. |
3. | Both Statement I and Statement II are correct. |
4. | Both Statement I and Statement II are incorrect. |
Apomictic embryos in Citrus arise from:
1. synergids
2. maternal sporophytic tissue in ovule
3. antipodal cells
4. diploid egg
Assertion (A): | Mendel's law of independent assortment holds good for genes that are located closely on the same chromosome. |
Reason (R): | Closely located genes assort independently. |
1. | (A) is not correct and (R) is not correct |
2. | Both (A) and (R) are correct and (R) is the correct explanation of (A) |
3. | Both (A) and (R) are correct but (R) is not the correct explanation of (A) |
4. | (A) is correct and (R) is not correct |
a: | body bears eight external rows of ciliated comb plates, which help in locomotion. |
b: | reproduction takes place only by asexual means. |
c: | digestion is both extracellular and intracellular. |
d: | sexes are separate. |
1. | a and c only | 2. | b and d only |
3. | a, b and c only | 4. | a, b and d only |
Suppression of sperm motility and their fertilizing capacity is the specific mechanism of action of:
1. | Lippes loop | 2. | Multiload 375 |
3. | LNG 20 | 4. | Progestasert |
Assertion(A): | Microinjection is the only way to introduce alien DNA into host animal cells. |
Reason(R): | Biolistics or gene gun is a method more suitable for transforming plant cells. |
1. | (A) is True but (R) is False. |
2. | (A) is False and (R) is True. |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
I: | neck and tail are absent. |
II: | a pair of nostrils is present. |
III: | a membranous tympanum (ear) receives sound signals. |
Tendons and ligaments are examples of:
1. | Loose connective tissue |
2. | Dense irregular connective tissue |
3. | Dense regular connective tissue |
4. | Specialized connective tissue |
List – I | List – II | ||
(a) | Metamerism | (i) | Ctenophora |
(b) | Canal system | (ii) | Cnidaria |
(c) | Comb Plates | (iii) | Annelida |
(d) | Metagenesis | (iv) | Porifera |
(a) | (b) | (c) | (d) | |
1. | (iii) | (iv) | (ii) | (i) |
2. | (iv) | (i) | (ii) | (iii) |
3. | (iv) | (iii) | (i) | (ii) |
4. | (iii) | (iv) | (i) | (ii) |
Column I | Column II | ||
(a) | Tidal volume | (i) | 2500-3000 mL |
(b) | Inspiratory Reserve | (ii) | 1100-1200 mL volume |
(c) | Expiratory Reserve | (iii) | 500-550 mL volume |
(d) | Residual volume | (iv) | 1000-1100 mL |
Options: | (a) | (b) | (c) | (d) |
1. | (iii) | (ii) | (i) | (iv) |
2. | (iii) | (i) | (iv) | (ii) |
3. | (i) | (iv) | (ii) | (iii) |
4. | (iv) | (iii) | (ii) | (i) |
Identify the incorrect statement:
1. | Each limb in humans has 30 bones. |
2. | Metacarpals are 8 in number while the metatarsals are 7 in number. |
3. | Patella forms the knee cap. |
4. | Femur is the longest bone in the human body. |
Which of the following conditions causes erythroblastosis fetalis?
1. Mother and fetus
2. Mother and fetus
3. Both mother and fetus
4. Both mother and fetus
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 |
1. | write the name in italics |
2. | separately underline them |
3. | start the genus name with a capital letter |
4. | start the specific epithet with a capital letter |
1. | The descending limb of loop of Henle is permeable to water. |
2. | The ascending limb of loop of Henle is impermeable to water. |
3. | The descending limb of loop of Henle is freely permeable to electrolytes. |
4. | The ascending limb of loop of Henle is permeable to electrolytes. |
Match each item in Column I [Barriers in innate immunity] with one in Column II [Example] and select your answer from the codes given:
|
Column I |
|
Column II |
A. |
Physical |
a. |
Skin and mucus membranes |
B. |
Physiological |
b. |
PMNL |
C. |
Cellular |
c. |
Acid in stomach and saliva in mouth |
D. |
Cytokine |
d. |
Interferon |
Codes
Options: | A | B | C | D |
1. | a | b | c | d |
2. | d | b | c | a |
3. | a | c | b | d |
4. | d | c | b | a |
Fossils are generally found in:
1. | Sedimentary rocks | 2. | Igneous rocks |
3. | Metamorphic rocks | 4. | Any type of rock |
Inheritance of skin colour in humans is an example of:
1. chromosomal aberration
2. point mutation
3. polygenic inheritance
4. codominance
Match the items given in Column I with those in Column II and select the correct option given below:
Column I | Column II | ||
a. | Fibrinogen | i. | Osmotic balance |
b. | Globulin | ii. | Blood clotting |
c. | Albumin | iii. | Defence mechanism |
a | b | c | |
1. | iii | ii | i |
2. | i | ii | iii |
3. | i | iii | ii |
4. | ii | iii | i |
In animal cells, steroidal hormones are synthesized in the:
1. | Rough endoplasmic reticulum |
2. | Smooth endoplasmic reticulum |
3. | Golgi apparatus |
4. | Lysosomes |
Low Ca2+ in the body fluid may be the cause of:
1. tetany
2. anaemia
3. angina pectoris
4. gout
Statement I: | The negatively charged DNA is wrapped around the positively charged histone octamer to form a structure called a nucleosome. |
Statement II: | A typical nucleosome contains 200 bp of DNA helix. |
1. | Statement I is incorrect; Statement II is correct |
2. | Statement I is correct; Statement II is correct |
3. | Statement I is correct; Statement II is incorrect |
4. | Statement I is incorrect; Statement II is incorrect |
Statement I: | The frog never drinks water but absorb it through the skin. |
Statement II: | In frog, the skin is always maintained in a moist condition. |
1. | is a non-steroidal oral contraceptive pill. |
2. | increases the concentration of estrogen and prevents ovulation in females |
3. | is an lUD |
4. | is a post-coital contraceptive |
A tumor that invades surrounding tissues is usually capable of producing metastases, may recur after attempted removal, and is likely to cause death unless adequately treated. Such a tumor is called a:
1. | Benign tumor | 2. | Malignant tumor |
3. | Teratoma | 4. | Secondary tumor |
The discontinuously synthesized DNA fragments are later joined by:
1. | DNA helicase | 2. | Topoisomerase |
3. | DNA ligase | 4. | DNA polymerase |
Widal test is done for the diagnosis of:
1. Pneumonia
2. Typhoid
3. Syphilis
4. AIDS
List-I | List-II | ||
A. | CCK | I. | Kidney |
B. | GIP | II. | Heart |
C. | ANF | III. | Gastric gland |
D | ADH | IV. | Pancreas |
Options: | (a) | (b) | (c) | (d) |
1. | IV | II | III | I |
2. | IV | III | II | I |
3. | III | II | IV | I |
4. | II | IV | I | III |
E. Coli about to replicate was placed in a medium containing radioactive thymidine for five minutes. Then, it was made to replicate in a normal medium. Which of the following observation shall be correct?
1. | Both strands of DNA will be radioactive |
2. | One strand is radioactive |
3. | Each strand is half radioactive |
4. | None is radioactive |
What is correct for the hormone whose mechanism of action is shown in the given diagram?
1. | This hormone will most likely be synthesized by the neural cells of the hypothalamus |
2. | This hormone cannot be thyroxin or triiodothyronine |
3. | This hormone can be a derivative of cholesterol |
4. | This hormone will have an almost instantaneous onset of action |
I: | The bronchioles and fallopian tubes are lined with ciliated epithelium |
II: | The alveoli are lined with stratified squamous epithelium. |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
Common cold differs from pneumonia in, that:
1. | Pneumonia is a communicable disease, whereas common cold is a nutritional deficiency disease |
2. | Pneumonia can be prevented by a live attenuated bacterial vaccine, whereas the common cold has no effective vaccine |
3. | Common cold is caused by a virus, while Pneumonia is caused by a bacterium. |
4. | Pneumonia pathogen infects alveoli whereas common cold affects the nose and the respiratory passage but not the lungs |
Column I | Column II | ||
A | Extinct reptile group crocodiles are descendents of | P | Therapsids |
B | Extinct reptile group mammals are descendents of | Q | 350 mya |
C | The dinosaurs suddenly disappeared from the earth | R | Thecodonts |
D | Jawless fish probably evolved around | S | 65 mya |
A | B | C | D | |
1. | P | R | Q | S |
2. | R | P | S | Q |
3. | P | R | S | Q |
4. | R | P | Q | S |
I. | Bacteriophages because of their high number per cell, have very high copy numbers of their genome within the bacterial cells. |
II. | If one wants to recover many copies of the target DNA, it should be cloned in a vector whose origin supports high copy number. |
III. | A selectable marker helps in identifying and eliminating non-transformants and selectively permits the growth of the transformants. |
IV. | Ti plasmid of Agrobacterium tumefaciens has now been modified into a cloning vector which is no more pathogenic to the plants but is still able to use mechanisms to deliver genes of our interest into a variety of plants. |
V. | Retroviruses in animals have the ability to transform normal cells into cancerous cells and hence can never be used as a cloning vector in rDNA procedures. |
1. | 2 | 2. | 3 |
3. | 4 | 4. | 5 |
Statement I: | Alimentary canal is complete with a well-developed muscular pharynx. |
Statement II: | An excretory tube removes body wastes from the body cavity through the excretory pore. |
Statement III: | They are dioecious and males are longer than females. |
1. | Only Statement II |
2. | Only Statement III |
3. | Only Statement I and Statement II |
4. | Only Statement II and Statement III |
Select the correct events that occur during inspiration.
(a) Contraction of diaphragm
(b) Contraction of external inter-costal muscles
(c) Pulmonary volume decreases
(d) Intra pulmonary pressure increases
1. (c) and (d)
2. (a), (b) and (d)
3. only (d)
4. (a) and (b)
Statement I: | Red fibres are ‘red’ due to large amount of myoglobin. |
Statement II: | Red muscles are also called as aerobic muscles. |
1. | Both Statement I and Statement II are correct and Statement II explains Statement I |
2. | Both Statement I and Statement II are correct but Statement II does not explain Statement I |
3. | Statement I is correct but Statement II is incorrect |
4. | Statement I is incorrect but Statement II is correct |
No new follicles develop in the luteal phase of the menstrual cycle because :
1. | Follicles do not remain in the ovary after ovulation |
2. | FSH levels are high in the luteal phase |
3. | LH levels are high in the luteal phase |
4. | Both FSH and LH levels are low in the luteal phase |
1. | carry blood away from the heart to different organs |
2. | break up into capillaries which reunite to form a vein |
3. | carry blood from one visceral organ to another visceral organ |
4. | supply oxygenated blood to the different organs |
I: | The left and right cerebral hemispheres are connected by a tract of nerve fibres called corpus spongiosum. |
II: | Association areas are neither clearly sensory nor motor in function. |
III: | Thalamus is a major coordinating centre for sensory and motor signaling. |
IV: | The hindbrain comprises pons, cerebellum and medulla. |
V: | Three major regions make up the brain stem: mid brain, pons and medulla oblongata. |
A decrease in blood pressure/volume will not cause the release of?
1. Atrial natriuretic factor
2. Aldosterone
3. ADH
4. Renin
Assertion (A): | Frogs are at their most vulnerable to predators when they are undergoing metamorphosis. |
Reason (R): | At this time, the tail is being lost and locomotion by means of limbs is only just becoming established. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |