24277 + Interview Questions in Biology in Class 12 Page 192 InterviewSolution

9551.	Question :Read the following statements and choose ones- (A) Carotenoids protect chlorophyll a from photooxidation, (B) Dark reactions are not directly light driven, ©Chlorophyll a molecule shows maximum absorption in red and blue regions of the visible spectrum oflight, (D) Light harvesting complexes are composed of hundreds of pigment molecules bound to lipids only.
Answer» A,B &C B,D &C A,C &D D,B &A Answer :A

Discussion

9552.	Question : Read the following statements and answerthe question which follows themI.Inliverworts,mosses andferns gametophytes are free living.II.Gymnosperms and some ferns are heterosporous.III.Sexualreproduction in Fucus, Volvox and Albugo is oogamous.IV.The sporophyte in liverworts ismore elaborate than that in mosses.How many of the above statementsarecorrect?
Answer» One Two Three Four Solution :(c) STATEMENT I, II and III are correct. Statement IV is incorrect and can be CORRECTED as the SPOROPHYTE in mosses is more ELABORATE than in liverworts.

Discussion

9553.	Question : Read the following statements and answer thequestion following them. A)Chylomicrons are very small proteins coated by fat globules. B)During assimilation absorbed substances finally reach tisssues which utilise them for their activities. C) Defaecation is a voluntary process. How many of these statements are correct?
Answer» TWO ONE Three None Answer :A

Discussion

9554.	Question : Read the following statements All ctenophores have solid tentacles which possess lasso cellwithout exception Ctenophores have branched gastrovascular cavity which opens to outside through mouth and two anal pores choose the correct option
Answer» Statement (A) and (B) are CORRECT Statement (A) is correct and (B) is incorrect Statement (A) is incorrect and (B) is correct Statement (A) and (B) are incorrect Answer :C

Discussion

9555.	Question : Read the following statements (a)in tubular reabsorption, substances like glucose, amino acid,Na^+, nitrogenous waste etc are reabsorbed by active transport, while reabsorption of water occur by passive transport (b) 50 -60% of electrolytes and water are absorbed by brush bordered cuboidal epithelium of PCT(c) conditional reabsorption of Na^+ and selective secretion of H^+ and K^+ occurs in DCT(d) filtrate gets concentrated as it moves upward in ascending limb of loop of henle. find the correct option regarding true or false statement.
Answer» a(T),B(T),C(F),d(F) a(F),b(T),c(F),d(F) a(F),b(F),c(T),d(F) a(T),b(F),c(T),d(f) ANSWER :C

Discussion

9556.	Question : Read the following statements about WBCs and select the correct option 1) Lymphocytes are responsible for immune responses of the body 2) Basophils are least in number among white blood cells. 3) Eosinophils can engulf antigen-antibody complexes 4) Monocytes are the only phagocytic ceils of blood so that they are waited internal scavengers.
Answer» only a and C are TRUE only B and c are true only b, c and d are true only a, b & c are true Answer :D

Discussion

9557.	Question : Read the following statements about satellite DNA and pick out the correct one
Answer» It is not found in centromeres It consists of NON REPETITIVE coding DNA It is a structural constituent of hetero-chromatin It occurs in all locations of HUMAN genome Answer :D

Discussion

9558.	Question : Read the following statements about respiratory system of humans : I. Type II alveoli help in secretion of a chemical surfactant called lecithin , which decreases the surface tension around alveoli. II. The diffusion membrane for exchange of gases is made up of three major cellular layers. III. Binding of oxygen with hemoglobin is primarily related to the partial pressure of O_2. IV. Every 100 ml of oxygenated blood can deliver around 5 ml CO_2 to the tissues under normal physiological conditions. How many statement is /are correct fromthe above ?
Answer» TWO THREE FOUR ONE ANSWER :A

Discussion

9559.	Question : Read the following statements about human reproduction :I. A tertiary follicle is characterized by the presence of a fluid - filled cavity called the antrum . II. The labia minora are fleshy folds of tissue , extend down the mons pubis , and surround the vaginal orifice . III. Most of the major organ systems of the fetus formed by the end of the second month of pregnancy . IV. The mammary glands of the female start producing milk during pregnancy. How many statements are incorrect from from the above
Answer» ONE Two Three Four ANSWER :C

Discussion

9560.	Question : Read the following statements about genetic markers and pickout the ul("incorrect") one
Answer» The genetic markers must be polymorphic, so that they are USEFUL in mapping. The genetic markers may be genes or DNA SEGMENTS that have no known coding function DNA polymorphs have variations in their DNA sequences. DNA polymorphs DIFFER in their NUCLEOTIDE sequences or constant NUMBER of randomly repeated sequences. Answer :D

Discussion

9561.	Question : Read the following statements about dicot stem and choose the correct option (a) Vascular bundles are arranged in a ring (b) Vascular bundles are conjoint, collateral and open type (C) Endarch type of arrangement of secondary xylem
Answer» Only ( B ) is CORRECT Only ( C ) is correct Both ( a ) & ( b ) are correct All ( a ), ( b ) & ( c ) are correct ANSWER :C

Discussion

9562.	Question : Read the following statements about cancer . Identify the true and false ones and select the correct option . A . Cancer cells lose the property of contact inhibition B. The property of metastasis is mostly found in benign tumors . C. The transformation of normal cells into cancerous cells occurs only because of chemical agents. D. The chemical carcinogen present in tobacco smoke is a major cause of lung cancer.
Answer» A - TRUE , B - FALSE , C - False , D - True A - False , B - True , C - True , D - False A - True , B - False , C - True, D - False A - False , B - True , C - False, D - True Answer :A

Discussion

9563.	Question :Read the following statements. (A)All the protochordates are marine.(B) Urochordates have tunic or test.(C)Urochordate reproduces both asexually and sexually.(D)Cephalochordates do not have respiratory pigmentHow many of the above mentioned statements are correct?
Answer» Only (A) Only (B) (A),(B)&(C) only (A), (B), (C) & (D) ANSWER :D

Discussion

9564.	Question :Read the following statements (A to E) for the translocation of the mineral ions and choose the option which have all the correct statements :- A – Chief sink for the minerals are growing regions of the plantB – Before leaf fall all minerals are removed and transport to other parts of the plants.C – Analysis of the xylem exudates shows that most of the nitrogen travels as the organic form like amino acids or amides.D – Unloading of the minerals ions occurs at the fine vein ending through diffusion only.E – Some elements that are structural components like calcium are not remobilised
Answer» A, C, E A, B, D B, D, E C, D, E ANSWER :A

Discussion

9565.	Question : Read the following statements :- (A) The vegetative cells have a cellulosic wall usually covered by coating of algin (B) Vegetative reproduction takes place by fragmentation (C) Sexual reproduction may be isogamous, anisogamous or oogamous (D) The gametes are pyriform (Pear shaped) and bear two laterally attached unequal flagella Which algal group represents these characteristics ?
Answer» Chlorophyceae Phaeophyceae Rhodophyceae Xanthophyceae Answer :B

Discussion

9566.	Question : Read the following statements - A - Speciation in microbes may occur within a few days. B. Anteater and numbat show convergent evolution. C. Branching descent is the concept of Darwin. How many statements are incorrect?
Answer» NONE ONE TWO All Answer :A

Discussion

9567.	Question : Read the following statements.(a) Simple leaves have bud on the axis of the petiole.(b) In pinnately compound leaf, the midrib forms a common axis called rachis. (c) Paripinnate leaves are found in Cassia. (d) Tripinnate leaves are found in Mimosa. Select the correct option.
Answer» (a), (B) & (C) (b), (c) & (d) (a), (b), (c) & (d) Only (a) & (d) ANSWER :A

Discussion

9568.	Question : Read the following statements. A. Scarification of seed involves softening and weakening of seed coat. B. Stratification of seed is subjecting the moist seeds to high pressure. Choose correct option
Answer» Only A is true Only B is true Both A and B are true Neither A nor B are true Answer :A

Discussion

9569.	Question : Read the following statements. (a) Optic lobes in humans are represented by two inferior colliculi of mid-brain.(b) Destruction of GABA secreting neurons leads to Parkinson's while Huntington's chorea is caused due to degeneration of dopamine secreting neurons. (c) Human brain is greatly convoluted, consisting of numerous gyri and sulci. (d) Amygdala is concerned with regulating moods, especially anger and rage.
Answer» ANSWER :B

Discussion

9570.	Question : read the following statements: (a) ontogeny is the life history of organisms. (b) classical taxonomy is based on morphological characters.(c) consciousness is is most obvious and technically complicated feature of only higher plants. (d) phylogeny is the evolutionary history of organisms. select the incorrect option
Answer» (a), (B) & (C) (c) & (d) (c) only All EXCEPT (d) ANSWER :C

Discussion

9571.	Question : Read the following statements: a. Interaction between hormones and environmental factors regulates the reproductive process. b. Strobilanthus kunthiana is a polycarpic plant. c. Gamete is a sex cell that contains haploid set of chromosomos. d. Jackfruit is a monocarpic plant. e. Term gamete was given by Gregor Johann Mendel. Select the correct option:
Answer» b, C, d & e a, c, & d a, c, d & e a, c & e Answer :D

Discussion

9572.	Question : Read the following statements (A-E) and answer the question which follows them, a) In liverworts, mosses and ferns gametophytes are free living. b) Gymnosperms and some ferns are heterosporous c) Sexual reproduction in Fucus, Volvox and Allbugo is oogamous. d) The sporophyte in liverworts is more elaborate than that in mosses How many of the above statements are correct?
Answer» FOUR One Two Three Answer :D

Discussion

9573.	Question : Read the following statements (A-D) and choose the option with correct ones :- (A) Fimbriae are helpful in attachment of bacteria to rocks in streams and to the host tissues (B) Flagellum is composed of filament, hook and Basal body. (C) Bacteria respond differently to the Gram staining due to difference in their cell wall structure. (D) Glycocalyx cell wall and plasma membrane are collectively termed as capsule.
Answer» A, C A, B A, B & C A, B, C & D Answer :C

Discussion

9574.	Question : Read the following statements (A-D) carefully . A. Causes the 25% loss of CO_2Fixed by Calvin - Benson cycle. B. Operates in Chloroplasts, leaf peroxisomes and mitochondria. C. Absent in photosynthetic bacteria. D. Does not produce ATP. Which light-dependent phenomenon has been described by the above statements ?
Answer» CYCLIC ETS Photolysis of water Photorespiration Pentose PHOSPHATE pathway Answer :C

Discussion

9575.	Question : Read the following statements (A - D) (A) The medulla contains centres, which control respiration, cardiovascular reflexes and gastric secretions. (B) The mid brain receives and integrates visual tactile and auditory inputs. (C) The neural syst em coordinat es and integrates functi ons metabol ic and homeostatic activities of all the organs. (D) A very important part of the forebrain called medulla oblongata controls eating and drinking How many of the above statements are false:
Answer» Three Two One Four Answer :C

Discussion

9576.	Question : Read the following statements :- (A) Asexual reproduction in liverworts takes place by spore formation (B) In Marchantia gemmae are green, unicellular asexual buds. (C) Vegetative reproduction in mosses is by fragmentation and budding in the secondary protonema. (D) The sporophyte in mosses is more elaborate than that in liverworts. In above statements how many are correct & incorrect.
Answer» A, C - CORRECT, B, D - incorrect A, D - correct, B, C - incorrect C, D - correct, A, B - incorrect A, B - correct, C, D - incorrect Answer :C

Discussion

9577.	Question : Read the following statements. a. Columner or cubial cells get specialised for secretion and are called glandular epithelium. b. Exocrine glands secretes mucus , saliva , milk , insulin , enzymes etc. c. Goblet cells are unicellular glands while salivary glands are multicellular glands. d. Tight junctions cement the neighbouring cells together. How many statements are correct?
Answer» `2` `3` `4` `1` ANSWER :A

Discussion

9578.	Question : Read the following statements (A-D) A. Coronary Artery Disease is also called atherosclerosis that affects the vessels that supply blood to the heat muscle. B. The electrocardiogram (ECG) on graph paper. During a cardiac cycle , the right ventricle pumps out about 70ml of oxygenated blood which is called stroke volume. D. The second heart sound is associated with the closure of the semilunar valves. How many statements from the above is / are incorrect ?
Answer» TWO ONE FOUR Three Answer :B

Discussion

9579.	Question : Read the following statements ( A-C ) about the human heart : A. The SA node is a specialized mass of cardiac tissue present in the lower-left corner of the right atrium close to the AV septum. B. The body has the ability to alter the heart rate, cardiac output but not stroke volume. C. The end of the T- wave in ECG marks the end of the systole. How Many statements is /are correct from the above?
Answer» Three Two ONE None Answer :B

Discussion

9580.	Question : Read the following statements ,(a). A péptide bond is formed between COOH group of 1st amino acid and NH, group of 2nd amino acid. Br (b)-Ribosome is the cellular factory responsible for synthesising proteins. Br(c) -Activation of amino acids accurs in the presence of ATP.Which of the given statements are correct wrl. translation?
Answer» a and B only b and C only a and c only a, b and c Answer :D

Discussion

9581.	Question : Read the following statements :- (1) Genetic Variability is the root of all breeding programs. (2) Induced mutations are useful when desired alleles are absent in germplasm. (3) Conventional breeding is not constrained by availability of limited number of genes. (4) Other breeding methods that are used selection amongst somaclonal variants and genetic engineering. How many of the above statements are correct ?
Answer» 1 2 3 4 Answer :C

Discussion

9582.	Question : Read the following statements. a. A group of similar cells along with intercellular substances performing a specific function form a tissue. b. All members of kingdom animalia consist of only four basic types of tissues. c. When two or more organs perform a common function by their physical or chemical interaction, they together form an organ system. d. The organ stomach in humans has all for types of tissues. How many above statements are correct?
Answer» `3` `2` `1` `4` ANSWER :A

Discussion

9583.	Question : Read the following statements
Answer» 4 3 2 none of the above Solution :(a) In 1997 an americaln company got patent RIGHT on basmati rice throught the us patent and TRADEMARK OFFICE (b) There are an estimated 200000 vartieties of rice in india alone (c ) First clinical gene therapy was given in 1990 to a 4 tyear old girl with adenosine deaminase deficiency (d) In 1983 Eli liy company prepared DNA sequences corresponding to A and B CHAIN of HUMAN insulin

Discussion

9584.	Question :Read the following statements :- (1) In bryophytes true root, stem and leaves are absent. (2) In Cycas, male cones and megasporophylls are borne on different trees. (3)Stem of Cycas is branched and of Pinus and Cedrus is unbranched. (4)In gymnosperms, generally tap roots are found. Select the correct statements:
Answer» a, B a,b,d a,b,C c,d ANSWER :D

Discussion

9585.	Question : Read the following statements w.r.t clone. and identify the correct statements. a . Individuals are exact copies of each other and their parents b. Involves mitotic as well as meiotic division. c. Group of morphologically and genetically similar individuals. d. Individual member of clone is referrod as "ramet."
Answer» a, b, C & d a & c only a, b & d a, c & d Answer :D

Discussion

9586.	Question : Read the following statement regarding male and female structures of Cucas. I. Microsporophyll of Cycas is flat and wedge-shaped. II. Microspores of Cycas shed at 4 cell (2 vegetative cell and 2 prothallial cell) stage . III. Female plants of Cycas circinalis are raised by means of bulbils. IV. The megasporangium of Cycas arelarge naked and orthotropous. Choose the incorrect statemnts.
Answer» II andIII Only IV Only II. Only III ANSWER :A

Discussion

9587.	Question : Read the following statement Statement A: Neural impulses generated in response to sound are received by the brain from ears. Statement B: Neural impulses for equilibrium are by the brain from ears as well as receptor present in the muscles, tendons, joints, skin and eyes
Answer» Both STATEMENT are correct Both statement are incorrect only statement A is incorrect only statement B is correct Answer :A

Discussion

9588.	Question : Read the following statement regarding meristematic sale and select the CORRECT ones (i) shoot apical meristem occupies the distant most region of the stem axis. (ii) The meristem which occurs between mature tissues is known as intercalary meristem. (iii) Both apical meristems and intercalary meristems are secondary meristems.
Answer» (i) and (II) (ii) and (III) (i) and (iii) (i) , (ii) and (iii) ANSWER :A

Discussion

9589.	Question : Read the following statements. ''Nature's biological library is burning even before we catalogued the titles of all the books stocked there'' This statement is given is your NCERT book. What would its mean
Answer» The diversity of plants and animals is not uniform. Rich biodiversity is essential for ecosystem health. A LARGE fraction of species FACE the threat of species face the threat of BECOMING extinct EVEN before we discover them. All of the above Answer :C

Discussion

9590.	Question : Read the following statement and select the correct option Statement-I: Tubular secretion is the only mode of excretion of metabolic wastes, from the peritubular capillaries and interstitial fluid, into the lumen of nephrons, in case of desert amphibians and marine fishes Statemetn-II: Desert amphibians and marine fishes do not haveglomeruli in their nephrons.
Answer» Both S-I and S-II are TRUE Both S-I and S-II are WRONG S-I is true and S-II is wrong. S-I is wrong and S-II is true. ANSWER :A

Discussion

9591.	Question : Read the following statement and find out INCORRECT statement . (a) Both a short day plant and a long day plant can flower simultaneously in a givenplace . (b) Sugar beet cabbage and carrot are common biennials . (c) Some important food plants, wheat, barley , and rye have three kinds of varieties : winter, summer, and spring varieties (d) Many of the intrinsic factors such as temperature and light , control plants growth and development.
Answer» a and d b and C c and d d and e Answer :C

Discussion

9592.	Question : Read the following statement and select the correct one
Answer» OXYHAEMOGLOBIN of erythrocytes is alkaline in a healthy person the haemoglobin content is more than 25 g PER 100 ml in lungs the oxygen FORM the alveolus reaches the blood though active transport the `h^(+)` released from carbonic acid COMBINES with haemoglobin to form haemoglobinic acid Answer :D

Discussion

9593.	Question : Read the following statement (A-E) and answer the question which follow them :- (A) Viruses have an inert crystalline structure outside the living cell (B) All virus contain both DNA and RNA (C) Virus causing diseases are mumps, ringworm, typhoid and AIDS (D) When virus infect a cell they take over the machinery of host cell to replicate themselves (E) Protein coat of virus is called capsid which is made up of subunits called as peplomers. How many above statements are correct ?
Answer» 1 2 3 4 Answer :B

Discussion

9594.	Question : Read the following statement (A) Biomagnification occurs because a toxic substance accumulated by an organism cannot be metabolismed or excreated and is thus passed on to the most higher trophic levels. (B) FOAM are responsible for the upkeep of the marshland developed in town of Ercala for integrated waste water treatment. (C) E.Coli indicates water pollution by faecal matter. Select the option for the set of all the correct statements.
Answer» (A), (B) & © (A) & (B) (B) & © (A) &(C) ANSWER :A

Discussion

9595.	Question : Read the following statement and choose the correct option spindle fibres get attached to the kinetochore of the chromosomes during metaphase. At the end of prophase cells do not show golgi complex, endoplasmic reticulum, nucleolus and the nuclear envelope. At anaphase centromere splits but chromatids do not separate.
Answer» A, B & C Only B Only A Only A & B Answer :D

Discussion

9596.	Question : Read the following statement A and B.Statement-A:Rosie, produced human protein enriched milk, 2.4 grams per litre.Statement-B:The Indian Parliament has recently cleared the second amendment of the Indian patents bill. Choose the correct option.
Answer» Only STATEMENT A is correct Only statement B is correct Both STATEMENTS are incorrect Both statements are correct Answer :D

Discussion

9597.	Question : Read the following statement A) 6th mass extinction species is being caused anthropogenically and is 10 time faster than the rate of natural extinctions. B) passenger pigeon have become extinct due to over Exploitations of humans. C) Norway has lower ecosystem diversitythan India.D) more than 50000 varieties of mango occur in India.choose the option with correct sets of statement
Answer» A and D A and B B and C C and D Answer :C

Discussion

9598.	Question : Read the following sentences and select the correct option given below.A. Neutrons are structural and functional unit of neural tissue which can generate,detect,and transmit different kinds of stimull.B. Schwann cells form both myelin sheath and neurilemma around axons in PNS.
Answer» Both A and B are CORRECT Both A and B are INCORRECT A is correct but B is incorrect A is incorrect but B is correct Answer :C

Discussion

9599.	Question : Read the following staisiients. A. ABA is derived from violaxanthin and is also known as anti GA hormone. B. Ethylene increases the number of male flowers. C. Extrinsic factors like temperature and light control plant growth and development via PGRs. D. GA, is used to speed up the malting process in brewing industry Choose the correct option.
Answer» Only A is incorrect Only B is incorrect A, B and C are incorrect B, C and D are incorrect Answer :B

Discussion

9600.	Question : Read the following satements and select the correct option. Loosely packed and light stained region of chromation are called as heterochromatin. (ii) Densely packed and dark stained region of chromatin are called as euchromatin. (iii) A typical nucleosome contains 200 bp of DNA helix.
Answer» Statements (i) and (ii) are TRUE , butstatement (iii) is false. Statement (i) and (ii) are false, but statement (iii) is true. Statement (ii) and (iii) are true , but statement (i) is false. All the statements are true. Solution :(b) : A typical nucleosome contains 200 BP of DNA helix. Nucleosomes constitute the repeating unit of a structure in nucleus called chromatin. Chromatin is held over a scaffold of NON -histone CHROMOSOMAL (or NHC) proteins. At some places chromatin is densely PACKED to form darkly stainined heterochromatin. At other placeschromatin is loosely packed. It is called euchromatin. It is transcriptionally active chromatin whereas heterrochromatin is transcriptionally active chromatin whereas heterochromatin istranscriptionally inactive and late replicating or heteropycnotic.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Read the following statements All ctenophores have solid tentacles which possess lasso cellwithout exception Ctenophores have branched gastrovascular cavity which opens to outside through mouth and two anal pores choose the correct option

Question : Read the following statements about satellite DNA and pick out the correct one

Question : Read the following statements about genetic markers and pickout the ul("incorrect") one

Question : Read the following statements about dicot stem and choose the correct option (a) Vascular bundles are arranged in a ring (b) Vascular bundles are conjoint, collateral and open type (C) Endarch type of arrangement of secondary xylem

Question :Read the following statements. (A)All the protochordates are marine.(B) Urochordates have tunic or test.(C)Urochordate reproduces both asexually and sexually.(D)Cephalochordates do not have respiratory pigmentHow many of the above mentioned statements are correct?

Question : Read the following statements - A - Speciation in microbes may occur within a few days. B. Anteater and numbat show convergent evolution. C. Branching descent is the concept of Darwin. How many statements are incorrect?

Question : Read the following statements.(a) Simple leaves have bud on the axis of the petiole.(b) In pinnately compound leaf, the midrib forms a common axis called rachis. (c) Paripinnate leaves are found in Cassia. (d) Tripinnate leaves are found in Mimosa. Select the correct option.

Question : Read the following statements. A. Scarification of seed involves softening and weakening of seed coat. B. Stratification of seed is subjecting the moist seeds to high pressure. Choose correct option

Question : Read the following statements

Question : Read the following statement Statement A: Neural impulses generated in response to sound are received by the brain from ears. Statement B: Neural impulses for equilibrium are by the brain from ears as well as receptor present in the muscles, tendons, joints, skin and eyes

Question : Read the following statements. ''Nature's biological library is burning even before we catalogued the titles of all the books stocked there'' This statement is given is your NCERT book. What would its mean

Question : Read the following statement and select the correct one

Question : Read the following statement A and B.Statement-A:Rosie, produced human protein enriched milk, 2.4 grams per litre.Statement-B:The Indian Parliament has recently cleared the second amendment of the Indian patents bill. Choose the correct option.

Question : Read the following sentences and select the correct option given below.A. Neutrons are structural and functional unit of neural tissue which can generate,detect,and transmit different kinds of stimull.B. Schwann cells form both myelin sheath and neurilemma around axons in PNS.

Question : Read the following satements and select the correct option. Loosely packed and light stained region of chromation are called as heterochromatin. (ii) Densely packed and dark stained region of chromatin are called as euchromatin. (iii) A typical nucleosome contains 200 bp of DNA helix.