Zoology

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Which of the following is not a component of Fallopian tube? Answer: 2. Uterine fundus Key idea: the fundus belongs to the uterus, not the Fallopian tube. The oviduct has four parts from the ovary side... Male and female reproductive systems 1 answer
Given below are two statements :Statement I : The presence or absence of hymen is not a reliable indicator of virginity.Statement II : The hymen is torn during the first coitus only.In the light of the above statements, choose the correct answer from… Answer: 4. Statement I is true but Statement II is false Key idea: the hymen can be torn by many activities, so it is not a sign of virginit... Male and female reproductive systems 1 answer
Three types of muscles are given as a, b and c. Identify the correct matching pair along with their location in human body :Name of muscle/location Answer: 3. (a) Skeletal - Triceps; (b) Smooth - Stomach; (c) Cardiac - Heart. Key idea: identify the tissue from the drawing, then its locat... Animal tissues: epithelial, connective, muscular, neural 1 answer
Given below are two statements:Statement I : Bt toxins are insect group specific and coded by a gene cry IAc.Statement II : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets co… Answer: 4. Statement I is true but Statement II is false Key idea: Bt toxin is specific to insect groups, and the protoxin is activated in a... Applications in agriculture: GMOs, Bt crops 1 answer
What is the fate of a piece of DNA carrying only gene of interest which is transferred into an alien organism?A. The piece of DNA would be able to multiply itself independently in the progeny cells of the organism.B. It may get integrated into the ge… Answer: 4. B and C only Key idea: a piece of alien DNA without an origin of replication cannot multiply on its own. It either integrates int... Processes of recombinant DNA technology 1 answer
Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of: Answer: 3. 6 bp Key idea: restriction enzymes such as Hind II recognise a specific palindromic sequence of 6 base pairs. Hind II recognises... Tools: restriction enzymes, vectors, host 1 answer
Select the correct statements with reference to chordates.A. Presence of a mid-dorsal, solid and double nerve cord.B. Presence of closed circulatory system.C. Presence of paired pharyngeal gillslits.D. Presence of dorsal heartE. Triploblastic pseudoc… Answer: 3. B and C only Key idea: Recall the basic features of chordates. A is wrong: the nerve cord is dorsal, hollow and single. B is corr... Chordates up to classes 1 answer
The unique mammalian characteristics are: Answer: 3. hairs, pinna and mammary glands Key idea: Hairs, external ear (pinna) and mammary glands are unique mammalian features. A monocon... Chordates up to classes 1 answer
Which one of the following is NOT an advantage of inbreeding? Answer: 1. It decreases the productivity of inbred population, after continuous inbreeding. Key idea: Inbreeding increases homozygosity. It... Mechanism: variation, mutation, recombination, natural selection 1 answer
Which of the following statements are correct ?A. Basophils are most abundant cells of the total WBCsB. Basophils secrete histamine, serotonin and heparinC. Basophils are involved in inflammatory responseD. Basophils have kidney shaped nucleusE. Baso… Answer: 4. B and C only Key idea: Recall the properties of basophils. A is wrong: neutrophils are the most abundant WBCs, basophils are the... Body fluids: blood, blood groups, coagulation, lymph 1 answer
Which of the following are NOT under the control of thyroid hormone?A. Maintenance of water and electrolyte balanceB. Regulation of basal metabolic rateC. Normal rhythm of sleep-wake cycleD. Development of immune systemE. Support the process of R.B.C… Answer: 4. C and D only Key idea: Thyroid hormones act on metabolism, water-electrolyte balance and RBC formation. A: thyroid hormones suppo... Endocrine glands and hormones, mechanism of action 1 answer
Which of the following statements are correct regarding skeletal muscle?A. Muscle bundles are held together by collagenous connective tissue layer called fascicle.B. Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions.C. Striated… Answer: 3. B and C only Key idea: Check each statement on skeletal muscle. A is wrong: the layer of collagenous connective tissue around bun... Locomotion: movement types, muscle contraction 1 answer
Match List I with List II.List I: A. Mast cells; B. Inner surface of bronchiole; C. Blood; D. Tubular parts of nephronList II: I. Ciliated epithelium; II. Areolar connective tissue; III. Cuboidal epithelium; IV. specialised connective tissueChoose th… Answer: 4. A-II, B-I, C-IV, D-III Key idea: Match the cell or location with its tissue. Mast cells: areolar connective tissue (II). Inner su... Animal tissues: epithelial, connective, muscular, neural 1 answer
Which of the following is characteristic feature of cockroach regarding sexual dimorphism ? Answer: 3. Presence of anal styles Key idea: In cockroaches, males have a pair of anal styles that females lack. Both sexes have anal cerci,... Frog: morphology and anatomy 1 answer
In cockroach, excretion is brought about by-A. Phallic glandB. Urecose glandC. NephrocytesD. Fat bodyE. Collaterial glandsChoose the correct answer from the options given below: Answer: 4. B, C and D only Key idea: In cockroaches, excretion is done by Malpighian tubules, and also by fat body, nephrocytes and urecose... Frog: morphology and anatomy 1 answer
Match List I with List II.List I: A. Heroin; B. Marijuana; C. Cocaine; D. MorphineList II: I. Effect on cardiovascular system; II. Slow down body function; III. Painkiller; IV. Interfere with transport of dopamineChoose the correct answer from the op… Answer: 2. A-II, B-I, C-IV, D-III Key idea: Match each drug with its effect. Heroin (smack): a depressant that slows down body functions (II... Adolescence, drug, alcohol and tobacco abuse 1 answer
In which blood corpuscles, the HIV undergoes replication and produces progeny viruses? Answer: 2. T _II cells Key idea: HIV enters macrophages and helper T-lymphocytes. Inside the helper T cells (T_H) the virus makes DNA with r... HIV and AIDS 1 answer
Match List I with List II.List I: A. Ringworm; B. Filariasis; C. Malaria; D. PneumoniaList II: I. Haemophilus influenzae; II. Trichophyton; III. Wuchereria bancrofti; IV. Plasmodium vivaxChoose the correct answer from the options given below: Answer: 2. A-II, B-III, C-IV, D-I Key idea: Match disease and causative organism. Ringworm: Trichophyton (II). Filariasis: Wuchereria bancro... Pathogens and parasites causing human diseases 1 answer
Select the correct group/set of Australian Marsupials exhibiting adaptive radiation. Answer: 3. Numbat, Spotted cuscus, Flying phalanger Key idea: Adaptive radiation in Australian marsupials gave forms that resemble placental... Adaptive radiation 1 answer
Given below are two statements:Statement I: RNA mutates at a faster rate.Statement II: Viruses having RNA genome and shorter life span mutate and evolve faster.In the light of the above statements, choose the correct answer from the options given bel… Answer: 2. Both Statement I and Statement II are true. Key idea: RNA genomes mutate faster than DNA genomes. Statement I is true: RNA is les... Mechanism: variation, mutation, recombination, natural selection 1 answer
Vital capacity of lung is ________. Answer: 1. IRV + ERV + TV Key idea: Vital capacity is the maximum air that can be breathed out after a maximum inspiration. VC = ERV + TV +... Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders 1 answer
Match List I with List II.List I: A. P - wave; B. Q - wave; C. QRS complex; D. T - waveList II: I. Beginning of systole; II. Repolarisation of ventricles; III. Depolarisation of atria; IV. Depolarisation of ventriclesChoose the correct answer from th… Answer: 2. A-III, B-I, C-IV, D-II Key idea: Link each ECG wave to the heart event. P wave: depolarisation of the atria (III). Q wave: beginn... Circulation: heart, cardiac cycle, ECG, double circulation, regulation, disorders 1 answer
Given below are statements: one is labelled as Assertion A and the other is labelled as Reason R.Assertion A: Nephrons are of two types: Cortical & Juxta medullary, based on their relative position in cortex and medulla.Reason R: Juxta medullary neph… Answer: 4. A is true but R is false. Key idea: Nephron types depend on the position of the glomerulus, and the loop of Henle follows from it... Excretion: modes, nephron, urine formation, osmoregulation 1 answer
The parts of human brain that helps in regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are : Answer: 2. Limbic system & hypothalamus Key idea: The limbic system together with the hypothalamus controls emotions and behaviour. It regul... Neural control: neuron, nervous system, nerve impulse 1 answer

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