Genetic drift is change of
1. gene frequency in same generation
2. appearance of recessive genes
3. gene frequency from one generation to next
4. None of the above
Given below is the representative evolutionary history of vertebrates through geological periods. A, B, C, and D respectively are:
A | B | C | D | |
1. | Dinosaurs | Thecodonts | Therapsids | Pelycosaurs |
2. | Dinosaurs | Therapsids | Thecodonts | Pelycosaurs |
3. | Pelycosaurs | Therapsids | Thecodonts | Dinosaurs |
4. | Therapsids | Dinosaurs | Pelycosaurs | Thecodonts |
Consider the statements given below regarding contraception and answer as directed
thereafter
(i) Medical Termination of Pregnancy (MTP) during first trimester is generally safe
(ii) Generally, chances of conception are nil until mother breast-feeds the infants upto
two year
(iii) Intrauterine devices like copper-T are effective contraceptives
(iv) Contraception pills may be taken up to one week after coitus to prevent conception
Which two of the above statements are correct?
1. ii, iii
2. iii, iv
3. i, iii
4. i, ii
Bt toxin is harmful to insects like:
(1) Lepidoterans (tobacco budworm, armyworms)
(2) Coleopterans (beetles)
(3) Dipterans (flies and mosquito)
(4) All are correct
"Rosie" a transgenic cow known to produce a type of milk which has all the following characteristics except:
(1) Protein content of 2.4 gm/litre
(2) Has human α-lactalbumin
(3) More balance diet than normal milk for babies
(4) None of these
When were family planning programmes initiated in India?
(1) 1948
(2) 1962
(3) 1959
(4) 1951
The embryological support for evolution was disproved by whose keen observations?
(1) Karl Ernst Von Baer
(2) Ernst Heckel
(3) Charles Darwin
(4) Alfred Wallace
Mammary lobe has not
(1) Alveoli
(2) Mammary tubules
(3) Lumen
(4) Lactiferous Duct
At puberty, how many primary follicles are there in each ovary in a female?
(1) 60000-80000
(2) 120000-160000
(3) 30000-40000
(4) 12000
The first meiotic division of primary oocyte is finished in
(1) Graafian Follicle
(2) Tertiary follicle
(3) Primary Follicle
(4) Randomly
Which event surely leads to pregnancy
(1) Unprotected coitus
(2) Fertilization
(3) Implantation
(4) Gestation
Which of the following is a physical barrier?
1. Mucus coating of urogenital tracts
2. Endothelium of blood vessels
3. Mucus coating of the auditory meatus
4. Monocytes
Marijuana, hashish, charas, ganja, heroin, cocaine, datura. How many are cannabinoids?
1. 4
2. 3
3. 5
4. 6
EcoRI comes from
1. Escherichia coli RY13
2. Escherichia coli RY16
3. Escherichia coli RY19
4. Escherichia coli RY12
Restriction enzyme EcoRI cuts
1. Between bases G and A
2. Cuts between GAATTC
3. Cuts between G and A at GAATTC
4. Both 1 and 3
The partial reason of increased yield during green revolution was
(1) Use of improved crop varieties
(2) Use of better management practices
(3) Use of agro-chemicals
(4) Use of fertilisers and pesticides
Bt toxin harms
(1) Beetles
(2) Bacillus
(3) Plants
(4) Bacteria
Assisted reproductive technology, IVF involves transfer of
1. ovum into the fallopian tube
2. zygote into the fallopian tube
3. zygote into the uterus
4. embryo with 16 blastomeres into the fallopian tube
At the end of spermatogenesis, sperms heads become embedded in the sertoli and finally released from the seminiferous tubules by the process called
1. Spermiogenesis
2. Spermateliosis
3. Spermiation
4. Androgenesis
Which is not a common mode of action between LNG20 and oral pill?
1. Inhibition of ovulation
2. Suppression of sperm motility and reduction of fertilizing ability of sperm
3. Alteration in quality of cervical mucus
4. Inhibition of implantation
Oogenesis differs from spermatogenesis in a number of aspects. One of the following is however a similarity between the two
1. Growth phase is prolonged in both of them an starts before birth
2. Both give rise to non-motile gametes
3. Both produce equal number of gametes
4. Both occur inside primary sex organ
In biotechnology transgenic animals are used for
I. Study of disease.
II. To obtained human protein.
III. Vaccine safety for humans.
IV. To know the carcinogenicity of any chemicals.
1. I, II, III and IV
2. III and IV only
3. I, III and IV
4. I and II only
In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as :
1. Adaptive Radiation
2. Divergent Evolution
3. Cyclical Evolution
4. Convergent Evolution
The exploitation of bioresources of a nation by multinational companies without authorization from the concerned country is referred to as:
1. | Bioweapon | 2. | Biopiracy |
3. | Bioethics | 4. | Biowar |
Which contraceptive method is highly effective but has very poor reversibility?
1. lUDs
2. Implants
3. Injectables
4. Sterilization
Identify the incorrectly matched pair:
|
STI |
Causative agent |
1. |
Gonorrhoea |
Bacteria |
2. |
Syphilis |
Bacteria |
3. |
HIV |
Retrovirus |
4. |
Trichomoniasis |
Fungus |
Similar biological structures or sequences in different taxa are homologous if they:
1. | always perform the same function |
2. | result from convergent evolution |
3. | do not serve any known function |
4. | are derived from a common ancestor |
Mark the factor which does not affect Hardy Weinberg equilibrium
1. Mutation
2. Sewall Wright effect
3. Random mating
4. Natural selection
The conditions of the earth's atmosphere, conductive for the origin of life were
1. Presence of high temperature, CH4, NH3 and O3
2. High temperature, CH4, NH3, lightening
3. High temperature, volcanic eruption, O2, NH3
4. Volcanic eruption, CH4, NH3 and O2
The extinct human who lived 1,00,000 to 40,000 years ago, in Europe, Asia and parts of Africa, With short stature, heavy eyebrows, retreating foreheads, large jaw with heavy teeth stocky bodies, a lumbering gait and stooped posture was
1 Cro-Magnon humans
2 Ramapithecus
3 Dryopithecus
4 Neanderthal human
Which of the following diseases is related with the statement "Don't die of ignorance"?
1 Cancer
2 AIDS
3 Hepatitis
4 Gonorrhoea
Cells involved in specific immune mechanism are
1 Erythrocytes
2 Lymphocytes
3 Eosinophils
4 Thrombocytes
Which of the following is correct about the Agrobacterium tumefaciens?
(1) Bacteria has tumor inducing plasmid
(2) Bacteria infects all broad leaved agricultural crops
(3) Modified bacteria infects monocot plant only
(4) Both (1) & (2)
The letter ‘R’ in the name of restriction endonuclease; ECoRI, denotes
(1) Genus of source
(2) Species of source
(3) Strain of source
(4) Order of discovery of source
Which of the following gene was linked with native plasmid of Salmonella typhimurium to construct the first recombinant DNA molecule?
(1) ADA gene
(2) Insulin gene
(3) Antibiotic resistance gene
(4) T-DNA
Which can be used as vector for transfer of DNA segment?
a. Bacterium
b. Plasmid
c. Plasmodium
d. Bacteriophage
(1) a & b
(2) b & c
(3) c & d
(4) b & d
Neoplastic cells in malignant tumors is/are characterised by
1 Absence of contact inhibition
2 Metastasis
3 Presence of contact inhibition
4 Both (1) & (2)
Which of the following is mismatched with respect to the following events which occur in the life cycle?
1 Erythrocytic schizogony | : The rupture of RBCs is associated with the release of a toxic substance hemozoin, which is responsible for the chill and high fever |
2 Gametocytes | : Sexual stages develop in intestine of mosquito |
3 Fertilization | : Takes place in intestine/stomach of mosquito |
4 Schizogony in liver cells | : The parasite reproduces asexually in liver cells bursting the cell and releasing merozoites into the blood |
1. | prevent ovulation |
2. | suppress sperm motility and fertilising capacity |
3. | prevent implantation |
4. | make cervix hostile to sperms |
1. | Non-transformants will grow on ampicillin containing medium |
2. | Non-recombinants will grow on ampicillin containing medium |
3. | Recombinants will grow on ampicillin containing medium |
4. | Recombinants will not grow on tetracycline containing medium |
(A) | Non-ionizing radiations like X-rays and \(\gamma\)-rays cause DNA damage leading to neoplastic transformation. |
(B) | MRI plays a significant role in detecting cancers of internal organs. |
(C) | Cellular oncogenes are inactivated under UV-rays leading to oncogenic transformation of cells. |
(A) | (B) | (C) | |
1. | F | T | T |
2. | F | F | T |
3. | F | T | F |
4. | T | F | F |
Assertion(A): | In humans, all copulations cannot lead to fertilisation and pregnancy |
Reason (R): | Ferrtilisation can only occur if the ovum and sperms are transported simultaneously to the ampulla |
1. | Both (A) and (R) are true and (R) is not the correct explanation of (A) |
2. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
3. | (A) is true but (R) is false |
4. | (A) is false but (R) is true |
Name of contraceptive device | Mechanism of action | |
1. | Cervical caps | Blocks the entry of sperms through cervix |
2. | Saheli | Selective estrogen receptor modulator that decreases endometrial thickness |
3. | Multiload-375 | Increases phagocytosis of Sperms in female genital tract |
4. | Lippes loop | Increases thickness of endometrium and thus chance of implantation increasese |
Assertion: | Polymerase chain reaction serve the purpose of early diagnosis of diseases. |
Reason: | PCR can detect very low concentration of a bacteria or virus, at a time when the symptoms of a disease are not yet visible, by amplification of their nucleic acid. |
1. | Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. |
2. | Both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. |
3. | Assertion is true but Reason is false. |
4. | Both Assertion and Reason are false. |
Assertion A: | An antibody is a protein molecules made by the lymphocytes. |
Reason R: | An antibody binds to a specific foreign antigen and neutralizes its odd effects. |
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 |