Zoology

7 chapters 406 solved questions 16 tests

Ask a question

Which of the following type of immunity is present at the time of birth and is a non-specific type of defence in the human body? Answer: 2. Innate Immunity Key idea: Innate immunity is present from birth and is non-specific. Acquired immunity is pathogen-specific and d... Immunology basics and vaccines 1 answer
Why can't insulin be given orally to diabetic patients? Answer: 2. It will be digested in Gastro-Intestinal (GI) tract Key idea: Insulin is a protein (peptide hormone). If taken orally, it is dige... Applications in health: human insulin, vaccines, gene therapy 1 answer
Which of the following enzyme(s) are NOT essential for gene cloning?A. Restriction enzymesB. DNA ligaseC. DNA mutaseD. DNA recombinaseE. DNA polymeraseChoose the correct answer from the options given below : Answer: 1. C and D only Key idea: Gene cloning needs enzymes to cut (restriction enzymes), join (DNA ligase), and make copies (DNA polymeras... Tools: restriction enzymes, vectors, host 1 answer
The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in presence of a chromogenic substrate.Given below are two statements abo… Answer: 4. Statement I is incorrect but Statement II is correct Key idea: Insertional inactivation of the lacZ gene (β-galactosidase). In a... Tools: restriction enzymes, vectors, host 1 answer
Role of the water vascular system in Echinoderms is :A. Respiration and LocomotionB. Excretion and LocomotionC. Capture and transport of foodD. Digestion and RespirationE. Digestion and ExcretionChoose the correct answer from the options given below… Answer: 2. A and C Only Key idea: The water vascular system of echinoderms (tube feet) works in locomotion, capture and transport of food, a... Non-chordates up to phyla 1 answer
Which of the following hormones released from the pituitary is actually synthesized in the hypothalamus ? Answer: 2. Anti-diuretic hormone (ADH) Key idea: Posterior pituitary hormones are made in the hypothalamus. ADH (and oxytocin) is synthesise... Endocrine glands and hormones, mechanism of action 1 answer
Match List - I with List - II.List - I: A. Progesterone B. Relaxin C. Melanocyte stimulating hormone D. CatecholaminesList - II: I. Pars intermedia II. Ovary III. Adrenal Medulla IV. Corpus luteumChoose the correct answer from the options given below… Answer: 1. A-IV, B-II, C-I, D-III Key idea: Match each hormone to its source. Progesterone: corpus luteum (A-IV). Relaxin: ovary (B-II). MSH... Endocrine glands and hormones, mechanism of action 1 answer
Consider the following statements regarding function of adrenal medullary hormones :A. It causes pupilary constrictionB. It is a hyperglycemic hormoneC. It causes piloerectionD. It increases strength of heart contractionChoose the correct answer from… Answer: 2. B, C and D Only Key idea: Adrenaline and noradrenaline prepare the body for fight or flight. A: wrong. They cause pupil dilation,... Endocrine glands and hormones, mechanism of action 1 answer
In frog, the Renal portal system is a special venous connection that acts to link : Answer: 4. Kidney and lower part of body Key idea: A portal system begins and ends in capillaries. In frogs, the renal portal system carries... Frog: digestive, circulatory, respiratory, nervous and reproductive systems 1 answer
Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs. Choose the correct answer from the following : Answer: 3. The statement is false for water but true for land Key idea: Frogs breathe through the skin in water, and through the lungs on la... Frog: digestive, circulatory, respiratory, nervous and reproductive systems 1 answer
Neoplastic characteristics of cells refer to :A. A mass of proliferating cellB. Rapid growth of cellsC. Invasion and damage to the surrounding tissueD. Those confined to original locationChoose the correct answer from the options given below: Answer: 2. A, B, C only Key idea: Neoplastic cells proliferate as a mass, grow rapidly and invade neighbouring tissue. A, B and C are correc... Cancer 1 answer
Identify the statement that is NOT correct. Answer: 3. Antigen binding site is located at C-terminal region of antibody molecules. Key idea: An antibody is Y-shaped, made of 2 heavy an... Immunology basics and vaccines 1 answer
After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens to secondary lymphoid organ(s) / tissue(s) like:A. thymus B. bone marrow C. spleen D. lymph nodes E. Peyer's patchesChoose the correct answer from the… Answer: 4. C, D, E only Key idea: Primary lymphoid organs are thymus and bone marrow, where lymphocytes mature. Secondary lymphoid organs ar... Immunology basics and vaccines 1 answer
Silencing of specific mRNA is possible via RNAi because of - Answer: 1. Complementary dsRNA Key idea: RNA interference (RNAi) works through double-stranded RNA. A dsRNA complementary to a specific mRNA... Applications in agriculture: GMOs, Bt crops 1 answer
Given below are two statements :Statement I : The DNA fragments extracted from gel electrophoresis can be used in construction of recombinant DNA.Statement II : Smaller size DNA fragments are observed near anode while larger fragments are found near… Answer: 1. Both statement I and statement II are correct Key idea: Gel electrophoresis separates DNA by size, and the separated bands can be... Processes of recombinant DNA technology 1 answer
All living members of the class Cyclostomata are: Answer: 4. Ectoparasite Key idea: Cyclostomes (lamprey, hagfish) are jawless vertebrates. All living members are ectoparasites on fishes. Th... Chordates up to classes 1 answer
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : All vertebrates are chordates but all chordates are not vertebrate.Reason (R) : The members of subphylum vertebrata possess noto… Answer: 1. Both A and R are true and R is the correct explanation of A Key idea: All chordates have a notochord, but only vertebrates replac... Chordates up to classes 1 answer
Sweet potato and potato represent a certain type of evolution. Select the correct combination of terms to explain the evolution. Answer: 1. Analogy, convergent Key idea: Different origin but similar function means analogy, which results from convergent evolution. Sweet... Evidences of evolution 1 answer
Match List - I with List - II.List - I: A. Heart B. Kidney C. Gastro-intestinal tract D. Adrenal CortexList - II: I. Erythropoietin II. Aldosterone III. Atrial natriuretic factor IV. SecretinChoose the correct answer from the options given below : Answer: 4. A-III, B-I, C-IV, D-II Key idea: Non-endocrine organs also secrete hormones. Heart: atrial natriuretic factor (A-III). Kidney: er... Endocrine glands and hormones, mechanism of action 1 answer
Consider the following :A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis.B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared t… Answer: 1. A and B are true Key idea: Compare timing of meiosis in the two sexes and the role of hormones. A is true. In females meiosis I b... Gametogenesis: spermatogenesis and oogenesis 1 answer
The first menstruation is called : Answer: 2. Menarche Key idea: The first menstrual flow at puberty is menarche. Menopause is the permanent end of cycles, diapause is delayed... Menstrual cycle 1 answer
Which are correct:A. Computed tomography and magnetic resonance imaging detect cancers of internal organs.B. Chemotherapeutics drugs are used to kill non-cancerous cells.C. α-interferon activate the cancer patients' immune system and helps in destroy… Answer: 4. A and C only A: correct. CT and MRI detect cancers of internal organs. B: wrong. Chemotherapeutic drugs kill cancer cells, though... Cancer 1 answer
Which of the following genetically engineered organisms was used by Eli Lilly to prepare human insulin? Answer: 1. Bacterium Key idea: Eli Lilly produced human insulin in 1983 using the bacterium E. coli. They made the A and B chains separately... Applications in health: human insulin, vaccines, gene therapy 1 answer
Identify the part of a bio-reactor which is used as a foam braker from the given figure. Answer: 4. C Key idea: In a stirred-tank bioreactor the foam breaker is a blade on the shaft near the top, in the headspace above the cultur... Processes of recombinant DNA technology 1 answer

Page 1 of 17