Zoology

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Which of the following statements are correct?A. An excessive loss of body fluid from the body switches off osmoreceptors.B. ADH facilitates water reabsorption to prevent diuresis.C. ANF causes vasodilation.D. ADH causes increase in blood pressure.E.… Answer: 3. B, C and D only Key idea: Know the effects of ADH and ANF. A is wrong: excessive loss of fluid activates the osmoreceptors, which... Regulation of kidney function, disorders, dialysis 1 answer
Match List I with List II.List I: A. Vasectomy; B. Coitus interruptus; C. Cervical caps; D. SaheliList II: I. Oral method; II. Barrier method; III. Surgical method; IV. Natural methodChoose the correct answer from the options given below: Answer: 3. A-III, B-IV, C-II, D-I Key idea: Classify the contraceptive method. Vasectomy: surgical (III). Coitus interruptus: natural method... Birth control, contraception and MTP 1 answer
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.Assertion A: Endometrium is necessary for implantation of blastocyst.Reason R: In the absence of fertilization, the corpus luteum degenerates that ca… Answer: 3. Both A and R are true but R is NOT the correct explanation of A. Key idea: Both statements are true, but they are unrelated. A is... Fertilisation, embryo development to blastocyst, implantation 1 answer
Match List I with List II.List I (Cells): A. Peptic cells; B. Goblet cells; C. Oxyntic cells; D. Hepatic cellsList II (Secretion): I. Mucus; II. Bile juice; III. Proenzyme pepsinogen; IV. HCl and intrinsic factor for absorption of vitamin B_12Choose… Answer: 4. A-III, B-I, C-IV, D-II Key idea: Match the gastric and liver cells with their secretions. Peptic (chief) cells: pepsinogen, a pro... Animal tissues: epithelial, connective, muscular, neural 1 answer
Which one of the following techniques does not serve the purpose of early diagnosis of a disease for its early treatment? Answer: 3. Serum and Urine analysis Key idea: Early diagnosis needs methods that detect a pathogen or a gene before symptoms appear. PCR amp... Applications in health: human insulin, vaccines, gene therapy 1 answer
Which of the following is not a cloning vector? Answer: 1. Probe Key idea: A cloning vector carries foreign DNA into a host and replicates there. BAC (bacterial artificial chromosome), YAC... Tools: restriction enzymes, vectors, host 1 answer
Match List I with List II.List I: A. Taenia; B. Paramoecium; C. Periplaneta; D. PheretimaList II: I. Nephridia; II. Contractile vacuole; III. Flame cells; IV. Urecose glandChoose the correct answer from the options give below: Answer: 4. A-III, B-II, C-IV, D-I Key idea: Match the animal with its excretory structure. Taenia: flame cells (III). Paramoecium: contracti... Non-chordates up to phyla 1 answer
Radial symmetry is NOT found in adults of phylum ________. Answer: 3. Hemichordata Key idea: Adult hemichordates (such as Balanoglossus) are bilaterally symmetrical. Adult echinoderms, ctenophores an... Non-chordates up to phyla 1 answer
Match List I with List II.List I: A. CCK; B. GIP; C. ANF; D. ADHList II: I. Kidney; II. Heart; III. Gastric gland; IV. PancreasChoose the correct answer from the options given below: Answer: 2. A-IV, B-III, C-II, D-I Key idea: Match each hormone with its source. CCK: secreted by the gastrointestinal tract and acts on the... Endocrine glands and hormones, mechanism of action 1 answer
Match List I with List II with respect to human eye.List I: A. Fovea; B. Iris; C. Blind spot; D. ScleraList II: I. Visible coloured portion of eye that regulates diameter of pupil.; II. External layer of eye formed of dense connective tissue.; III. P… Answer: 2. A-III, B-I, C-IV, D-II Key idea: Match each eye part with its function. Fovea: point of greatest visual acuity (III). Iris: visib... Neural control: neuron, nervous system, nerve impulse 1 answer
Match List I with List II.List I (Type of Joint): A. Cartilaginous Joint; B. Ball and Socket Joint; C. Fibrous Joint; D. Saddle JointList II (Found between): I. Between flat skull bones; II. Between adjacent vertebrae in vertebral column; III. Betwee… Answer: 3. A-II, B-IV, C-I, D-III Key idea: Match each joint with its location. Cartilaginous joint: between adjacent vertebrae (II). Ball a... Skeletal system, joints and disorders 1 answer
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.Assertion A: Amniocentesis for sex determination is one of the strategies of Reproductive and Child Health Care Programme.Reason R: Ban on amniocente… Answer: 1. A is false but R is true. Key idea: Amniocentesis is misused to find the sex of the foetus, so it is banned for that purpose. Ass... Amniocentesis, infertility and ART (IVF, ZIFT, GIFT) 1 answer
Given below are two statements:Statement I: Vas deferens receives a duct from seminal vesicle and opens into urethra as the ejaculatory duct.Statement II: The cavity of the cervix is called cervical canal which along with vagina forms birth canal.In… Answer: 2. Both Statement I and Statement II are true. Key idea: Check each statement against male and female reproductive anatomy. Statemen... Male and female reproductive systems 1 answer
Which of the following statements are correct regarding female reproductive cycle?A. In non-primate mammals cyclical changes during reproduction are called oestrus cycle.B. First menstrual cycle begins at puberty and is called menopause.C. Lack of me… Answer: 1. A, C and D only Key idea: Check each statement. A is correct: non-primate mammals show the oestrus cycle. B is wrong: the first m... Menstrual cycle 1 answer
Which one of the following common sexually transmitted diseases is completely curable when detected early and treated properly? Answer: 3. Gonorrhoea Key idea: Bacterial STDs can be cured with antibiotics, but viral STDs cannot. HIV, genital herpes and hepatitis-B are... Reproductive health and STDs 1 answer
Given below are two statements:Statement I: Ligaments are dense irregular tissue.Statement II: Cartilage is dense regular tissue.In the light of the above statements, choose the correct answer from the options given below: Answer: 3. Both Statement I and Statement II are false. Key idea: Check the type of tissue for each structure. Statement I is false: ligamen... Animal tissues: epithelial, connective, muscular, neural 1 answer
Once the undigested and unabsorbed substances enter the caecum, their backflow is prevented by- Answer: 3. Ileo - caecal valve Key idea: The valve between the ileum and caecum prevents backflow. The ileo-caecal valve guards the opening... Frog: digestive, circulatory, respiratory, nervous and reproductive systems 1 answer
In gene gun method used to introduce alien DNA into host cells, microparticles of ________ metal are used. Answer: 4. Tungsten or gold Key idea: In the biolistic (gene gun) method, DNA is coated on microscopic particles of tungsten or gold, which... Processes of recombinant DNA technology 1 answer
Main steps in the formation of Recombinant DNA are given below. Arrange these steps in a correct sequence.A. Insertion of recombinant DNA into the host cell.B. Cutting of DNA at specific location by restriction enzyme.C. Isolation of desired DNA frag… Answer: 2. B, C, D, A or 4. C, B, D, A Key idea: A recombinant DNA is made by cutting the DNA, getting the desired fragment, amplifying it,... Processes of recombinant DNA technology 1 answer
Upon exposure to UV radiation, DNA stained with ethidium bromide will show Answer: 1. Bright orange colour Key idea: DNA stained with ethidium bromide and exposed to UV light fluoresces as bright orange bands. This... Processes of recombinant DNA technology 1 answer
Statements related to human Insulin are given below. Which statement(s) is/are correct about genetically engineered Insulin ?(a) Pro-hormone insulin contain extra stretch of C-peptide(b) A-peptide and B-peptide chains of insulin were produced separat… Answer: 3. (b) only Key idea: The question is about genetically engineered insulin. (b) Correct: A and B chains were made separately in E. c... Applications in health: human insulin, vaccines, gene therapy 1 answer
Which of the following is not a desirable feature of a cloning vector ? Answer: 1. Presence of two or more recognition sites Key idea: A good cloning vector should have a single recognition site for the restricti... Tools: restriction enzymes, vectors, host 1 answer
Which of the following statements is not true ? Answer: 1. Flippers of penguins and dolphins are a pair of homologous organs Key idea: Homologous organs share origin; analogous organs shar... Evidences of evolution 1 answer
Which one of the following statements is correct ? Answer: 4. Blood moves freely from atrium to the ventricle during joint diastole. Key idea: During joint diastole, both atria and ventricles... Circulation: heart, cardiac cycle, ECG, double circulation, regulation, disorders 1 answer

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