22339 + Interview Questions in Biology in Class 11 Page 230 InterviewSolution

11451.	Question : Succulents are known their stomata closed during the day to chek transpiration . How dothey meet their photosynthetic CO_(2) requirements ?
Answer» Solution :Xerophytic plants grow in area where - water is scarce. Stomata are closed during the day so exchanged of gases does not take PLACE. These plants have a special arrangement. In that for fixation of `CO_(2)` is fixed in malic ACID during night `CO_(2). It has 4 carbons. During day `CO_(2)` is released and enters into PHOTOSYNTHETIC cellw which do work of PHOTOSYNTHESIS.

Discussion

11452.	Question : Successions that occur on soils or areas which have recently lost their community are referred to as
Answer» PRIMARY successions secondary successions lithoseres priseres Answer :B

Discussion

11453.	Question : Succession stages that occur in salt marshes is called
Answer» PSAMMOSERE HALOSERE Lithosere Hydrosere Answer :B

Discussion

11454.	Question : Succelent performs CO_(2) fixation by
Answer» CAM pathway `C_(4)`pathway `C_(3)`pathway `C_(2)`pathway Solution :Succulents PERFORM `CO_(2)` FIXATION by CAM pathway.

Discussion

11455.	Question : Succession is
Answer» Orderly PROCESS of community change till stability Gradual, CONVERGENT DIRECTIONAL and continuous process Series of biotic communities that appear GRADUALLY in a barren area All of the above Answer :D

Discussion

11456.	Question : Succelentsare know to keep theirstomata closedduringthe dayto check transpiration . Howdo theymeet theirphotosyntheitcCO_(2) requirements ?
Answer» Solution :Succulentsundergo a specialcarbon pathway called Crassulacean Acid Metabolism(CAM pathway). At nighttime , CAMplantsfor `CO_(2)`with thehelp of Phosphoenol PYRUVICACID ( PEP) and produe Oxalo AceticAcid (OAA) . Subsequently OAAis convertedinto malicacid like `C_(4)`cycleand produces `CO_(2)`. The `CO_(2)`thusformedentersCalvinscycleproduces carbohdrates .

Discussion

11457.	Question : Substrate level phosphorylation occurs during which step of Krebs' cycle
Answer» Succinly`CoA rarr` Succinic acid Isocitric acid `rarr` Oxalosuccinic acid Oxalosuccinic acid `rarr alpha-`ketoglutaric acid Malic acid `rarr OA A` SOLUTION :During Krebs' or citric acid cycle, succinyl-CoA is acted upon by enzyme sucinyl-CoA synthese to form succinate (a 4 C compound). The reaction releases sufficient energy to form ATP (in PLANTS) or GTP (in ANIMALS) by SUBSTRATE level phosphorylation GTP can form ATP through a coupled reaction `"Succiny CoA + GDP/ADP +H"_(3)PO_(4) underset("synthetase")overset("Succinyl CoA")(hArr) "Succinate + CoA + GTP/ATP"`

Discussion

11458.	Question :Subterranean cleistogamous and geophilous flowers occur in
Answer» Viola Anthocephalus COMMELINA benghalensis FICUS benghalensis Answer :C

Discussion

11459.	Question :Subterranean cleistogamous flowers are found in
Answer» FICUS benghalensis COMMELINA benghalensis Adina cordifolia Anthocephalus cadamba ANSWER :B

Discussion

11460.	Question : Substrate level phosphorylation occurs in TCA cycle during conversion of :
Answer» Oxaloacetic ACID to CITRIC acid Succinyl CoA to succinic acid Succinic acid to fumaric acid Fumaric acid to malic acid ANSWER :B

Discussion

11461.	Question : Substance whichbring about changesinallostericsites are called.
Answer» activators inhibitors promoters modulators ANSWER :D

Discussion

11462.	Question :Substance that accumulates in a fatigued muscle is ..............
Answer» PYRUVIC ACID LACTIC acid `CO_(2)` ADP Solution :Lactic acid

Discussion

11463.	Question : Subcellular organelle is :
Answer» Peroxisome Ribosome Plastid Lysosome Solution :Ribosome is NAKED (without any UNIT membranous COVERING) so is CALLED subcellular organelle.

Discussion

11464.	Question : Sub oesophageal ganglion is called
Answer» PRINCIPAL sensory CENTRE principal MIXED centre principal motor centre all the above Answer :C

Discussion

11465.	Question : Sub neural blood vessel runs below
Answer» a. nerve RING b. SEGMENTAL nerves C. nerve CORD d. DORSAL blood vessel Answer :C

Discussion

11466.	Question : Study this structure of a root hair andanswer the following: Label parts a, b, c, d and e.
Answer» Solution :a. CELL WALL b. cytoplasm c. VACUOLE d. NUCLEUS e. cell membrane

Discussion

11467.	Question : Study this structure of a root hair andanswer the following: How many cells is a root hair made upof?
Answer» SOLUTION :ONE CELL.

Discussion

11468.	Question : Study this structure of a root hair andanswer the following: Give one important property of part'e'.
Answer» SOLUTION :CELL MEMBRANE is SEMI PERMEABLE.

Discussion

11469.	Question : Study this structure of a root hair andanswer the following: What is the function of root hair?
Answer» SOLUTION :CELL WALLS are THIN and PERMEABLE.

Discussion

11470.	Question : Study the set-up shown in the diagram and answer the following: What will happen if a boiled potato istaken?
Answer» SOLUTION :OSMOSIS will not TAKE PLACE.

Discussion

11471.	Question : Study the set-up shown in the diagram and answer the following: What change will you observe in part'B' of the setup after one hour? Givereason for this change.
Answer» SOLUTION :the LEVEL of solution will RISE in PART .B.

Discussion

11472.	Question : Study the set-up shown in the diagram and answer the following: What is the technical term for thisprocess?
Answer» SOLUTION :OSMOSIS.

Discussion

11473.	Question : Study the set-up given in the diagram and answer the following questions: Why is the membrane calledsemipermeable membrane?
Answer» Solution :The membrane allows only water MOLECULES to pass and RESTRICTS the ENTRY of sugar molecules.

Discussion

11474.	Question : Study the set-up given in the diagram and answer the following questions: What is this process known as?
Answer» SOLUTION :OSMOSIS.

Discussion

11475.	Question : Study the set-up given in the diagram and answer the following questions: Which limb of the set-up containsmore concentrated solution?
Answer» SOLUTION :TUBE A CONTAINS more CONC. SOLUTIONS.

Discussion

11476.	Question : Study the set-up given in the diagram and answer the following questions: What will be the level in tube A andtube B after 1 hour of set-up?
Answer» Solution :LEVEL in tube B will RISE after 1 hour.

Discussion

11477.	Question :Study the set-up given alongside andanswer the questions given below: Why is the surface of water coveredwith oil?
Answer» Solution :Oil prevents EVAPORATION of water. It is to PREVENT evaporation from the TEST TUBE.

Discussion

11478.	Question :Study the set-up given alongside andanswer the questions given below: Which physiological process does thissetup of experiment show?
Answer» SOLUTION :ABSORPTION of WATER by ROOT.

Discussion

11479.	Question :Study the set-up given alongside andanswer the questions given below: What will happen to the level of waterin test tubes A & B?
Answer» Solution :In test tube A the PLANT absorbs WATER and transpires also, hence the water LEVEL FALLS, test tube B is a control, the water level. Does notefall SINCE there is no plant in it.

Discussion

11480.	Question :Study the set-up given alongside andanswer the questions given below: What is the purpose of the setting uptest tube B?
Answer» Solution :Test tube B ACTS as a control for SET up .A..

Discussion

11481.	Question : Study the given figure in which two chambers A and B, containing solutions are separated by a semipermeable membrane : If one chamber has Psi of - 2000 kPa and the other-1000 k Pa, which is the chamber that has higher Psi?
Answer» SOLUTION :`-1000 KP `

Discussion

11482.	Question : Study thegivenfigurecarefullyandanswerthe followingquestions : (i)LabeltheParts maeked as(a),(b) ,( C) ,(d) and € (ii)giveonemajorfunctionof eachpart.
Answer» SOLUTION :(i) (a)Sertoli cells (b)Seminiferoustubule ( C) Spermatozoa ( D)SPERMATOGONIA ( e)Intersitial cells . (II)FUNCTIONOF parts: (a)sertolicellsprovidenutrition todevelopingspermatozoa . ( B)Spermatozoa areformedin theseminiferoustubules from spematoniathatarisefromgerminalepithelialcells . ( C)Theseare male gameteswhichfertilizethe ovum . (d)Thespermatoeniccellsofgerminalepithliumliningtheseminiferoustubulesby mitotic divisionsproducespermatogonia , Thelatterundergomeioticdivisiontoform spermatozoa . ( E)Intersitialcellssecretesexhormones(Testosterone ).

Discussion

11483.	Question : Study the given data and answer the questions that follow. A sample of an enzyme called lactase was isolated from the intestinal lining of a calf. Assays were undertaken to evaluate the activity of the enzyme sample. The substrate of lactase is the disaccharide lactose. Lactase breaks a lactose molecule in two, producing a glucose molecule and a galactose molecule. Two assays were carried out. {:("Lactose concentration (% w/v)",15,15,15,15,15,15),("Concentration of enzyme smaple (%v/v)",0,5,10,15,20,25),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,25,50,75,100,125):} {:("Lactose concentration (% w/v)",0,5,10,15,25,30),("Concentration of enzyme smaple (%v/v)",5,5,5,5,5,5),("Reaction rate "mu"mole glucose "sec^(-1)mL^(-1),0,15,25,35,40,40):} Which of the following statements can be concluded from the two assays ?
Answer» The reaction rate of the LACTASE assay is always proportional to the amount of ENZYME present. The amount of lactose in an assay has no effect on the rate of the reaction. The reaction rate of the lactase assay is proportional to the amount of lactose present. The reaction rate is proportional to the amount of enzyme present at a lactose concentration of 15%w/v. Solution :The reaction rate is proportional to the amount of enzyme present at a lactose concentration of `15% w//v`. The rate of reaction is proportional with the SUBSTRATE concentration only to a limit, after which any increase in substrate concentration MAKES no difference in rate of reaction, the rate of reaction then remains constant.

Discussion

11484.	Question : Study the four statements (i-iv) given below and select the two correct ones out of them. i) Alion eating a deer and a sparrow feeding on grains are ecologically similar in being consumers. ii) Predator star fish pisaster helps in maintaining species diversity of some invertebrates. iii) Predators ultimately lead to the extinction of prey species iv)Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders. The two correct statements are
Answer» a and d a and B b and C c and d ANSWER :B

Discussion

11485.	Question : Study the following statements regarding inbreedind and select the incorrect ones. i) The inbreeding strategics allow the desirable qualities of two different breeds to be combined ii) It increases homozygosity. iii) It also helps in elimination of less disirable genes. iv) Continued inbreeding increases fertility and productivily.
Answer» i and ii ii and iii iii and iv i and iv Answer :D

Discussion

11486.	Question : Study the following statements carefully and give the answer A) Belladonna and ashwagandha are the medicinal plants that belong to Solanaceae family B) Tulips produce very beautiful flowers and belong to Liliaceae family C) A flower is a modified shoot, meant for sexualreproduction D) After fertilisation ovary and ovule convertinto fruit and seed respectively in gymnospermic plants angiosperme, How many statements are correct from these?
Answer» Two Three Four Five ANSWER :B

Discussion

11487.	Question : Study the following statements and select the incorrect option.
Answer» Tapetum NOURISHES the developing pollen GRAINS Hilum represents the junction between OVULE and funicle In aquatic plants such as water hyacinth and water LILY, pollination occurs by water The primary endosperm nucleus is triploid Answer :A

Discussion

11488.	Question : Study the following statements and select the incorrect ones. (i) Pyramids of energy can never be inverted, since this would violate the laws of thermodynamics. (ii) Pyramids of standing crop and numbers can be inverted since the number of organisms at a time does not indicate the amount of energy flowing through the system. (iii) There are certain limitations of ecological pyramids such as they do not take into account the same species belonging to two or more trophic levels. (iv) Saprophytes are not given any place in ecological pyramids even though they play a vital role in the ecosystem.
Answer» (i) and (III) (iii) and (IV) (II) and (iii) NONE of these Answer :D

Discussion

11489.	Question : Study the following statements and select the incorrect one.
Answer» SHORTER food chains PROVIDE more energy as compared to longer food chains. Ecological factors connected with PHYSICAL geography of earth are CALLED topographic factors The pyramid of biomass is upright in a grassland ecosystem and the pyramid of NUMBERS is upright in a parasitic food chain. None of these Answer :C

Discussion

11490.	Question : Study the following plants, I. Hibiscus II Brassica III. Papaver IV. Annona V. Michelia VI. Rosa VII. Lotus. In how many plants the gynoecium is apocarpous and multicarpellary.
Answer» 3 4 5 2 Answer :B

Discussion

11491.	Question :Study the following in nitrogen cycle and identify A and B NH_3 overset((A))to NO_2^(-) overset(B)to NO_3^(-)
Answer» A-Nitrosomonas, B-Nitrobactor A-Nitrobactor, B-Nitrobactor A-Nitrobactor, B-Nitrosomonas A-Thiobacillus, B-Nitrobacter Answer :A

Discussion

11492.	Question : Study the following flowchart and fill up the blanks by selecting the correct option.
Answer» `{:("(A)","(B)","(C)",(D)),("THORACIC skeleton","Limbs","Skull","Ribs"):}` `{:("(A)","(B)","(C)",(D)),("APPENDICULAR skeleton","Skull","Ribs","Limbs"):}` `{:("(A)","(B)","(C)",(D)),("Appendicular skeleton","Limbs","Ribs","Skull"):}` `{:("(A)","(B)","(C)",(D)),("LUMBAR skeleton","Limbs","Skull","Ribs"):}` Solution :N//A

Discussion

11493.	Question : Study the following equation and name the reaction A and B. Glycogen in liverunderset(B) overset(A)hArr Glucose in blood
Answer» SOLUTION :REACTION A is GLYCOGENOLYSIS. Reaction B is GLYCOGENESIS.

Discussion

11494.	Question : Studythe following figure representingthe life cycle of a typical cnidarian and choose the correct option .
Answer» `{:(A,B),("SEXUAL REPRODUCTION ","ASEXUAL reproduction"):}` `{:(A,B),("Asexual reproduction"," Sexual reproduction"):}` `{:(A,B),("Asexual reproduction"," ASexual reproduction"):}` `{:(A,B),("Sexual reproduction"," Sexual reproduction"):}` ANSWER :B

Discussion

11495.	Question : Study the following characters: Bicarpellary ovary, syncarpous ovary, bilocular ovary, Superior ovary, unequal lengthed stamens, polypetalous corolla, six stamens, dry fruit, ovules attached to false septum, tetramerous flower, ebracteate flower, bisexual flower, hypogynous flowers. How many characters from the above list observed in the taxon "Brassica"
Answer» 10 6 12 13 Answer :D

Discussion

11496.	Question : Study the following given table and select the correct option that represents the letters.
Answer» `{:("CHONDRICHTHYES","Osteichthyes"),("(1)A, C & E","B ,D ,F & G "),((2)"A ,D ,E & G ","B ,C & F "),((3)"A,D & E","B,C ,F &G"),((4)"B,D,E & F","A ,C,& G"):}` `{:("Chondrichthyes","Osteichthyes"),("(1)A,D,E& G","B ,C& F "):}` `{:("Chondrichthyes","Osteichthyes"),("A,D & E","B,C,F & G"):}` `{:("Chondrichthyes","Osteichthyes"),("B ,D E & F","A,C & G"):}` Answer :C

Discussion

11497.	Question : Study the figures given below and identify the option which represents correct grouping of the labelled figures A,B,C and D.
Answer» ANSWER :C

Discussion

11498.	Question : Study the diagram given alongsideshowing a plant cell kept in a strong sugar solution. What will happen to this cell if it is kept in water?
Answer» SOLUTION :ENDOSMOSIS LEADING to TURGIDITY

Discussion

11499.	Question : Study the diagram given alongsideshowing a plant cell kept in a strong sugar solution. Name the process the cell hasundergone. What is the reason of the processnamed?
Answer» SOLUTION :EXOSMOSIS

Discussion

11500.	Question : Study the diagram given alongsideshowing a plant cell kept in a strong sugar solution. Name the process the cell hasundergone.
Answer» SOLUTION :PLASMOLYSIS

Discussion

Explore topic-wise InterviewSolutions in .

Question : Succulents are known their stomata closed during the day to chek transpiration . How dothey meet their photosynthetic CO_(2) requirements ?

Question : Successions that occur on soils or areas which have recently lost their community are referred to as

Question : Succession stages that occur in salt marshes is called

Question : Succelent performs CO_(2) fixation by

Question : Succession is

Question : Succelentsare know to keep theirstomata closedduringthe dayto check transpiration . Howdo theymeet theirphotosyntheitcCO_(2) requirements ?

Question : Substrate level phosphorylation occurs during which step of Krebs' cycle

Question :Subterranean cleistogamous and geophilous flowers occur in

Question :Subterranean cleistogamous flowers are found in

Question : Substrate level phosphorylation occurs in TCA cycle during conversion of :

Question : Substance whichbring about changesinallostericsites are called.

Question :Substance that accumulates in a fatigued muscle is ..............

Question : Subcellular organelle is :

Question : Sub oesophageal ganglion is called

Question : Sub neural blood vessel runs below

Question : Study this structure of a root hair andanswer the following: Label parts a, b, c, d and e.

Question : Study this structure of a root hair andanswer the following: How many cells is a root hair made upof?

Question : Study this structure of a root hair andanswer the following: Give one important property of part'e'.

Question : Study this structure of a root hair andanswer the following: What is the function of root hair?

Question : Study the set-up shown in the diagram and answer the following: What will happen if a boiled potato istaken?

Question : Study the set-up shown in the diagram and answer the following: What change will you observe in part'B' of the setup after one hour? Givereason for this change.

Question : Study the set-up shown in the diagram and answer the following: What is the technical term for thisprocess?

Question : Study the set-up given in the diagram and answer the following questions: Why is the membrane calledsemipermeable membrane?

Question : Study the set-up given in the diagram and answer the following questions: What is this process known as?

Question : Study the set-up given in the diagram and answer the following questions: Which limb of the set-up containsmore concentrated solution?

Question : Study the set-up given in the diagram and answer the following questions: What will be the level in tube A andtube B after 1 hour of set-up?

Question :Study the set-up given alongside andanswer the questions given below: Why is the surface of water coveredwith oil?

Question :Study the set-up given alongside andanswer the questions given below: Which physiological process does thissetup of experiment show?

Question :Study the set-up given alongside andanswer the questions given below: What will happen to the level of waterin test tubes A & B?

Question :Study the set-up given alongside andanswer the questions given below: What is the purpose of the setting uptest tube B?

Question : Study the given figure in which two chambers A and B, containing solutions are separated by a semipermeable membrane : If one chamber has Psi of - 2000 kPa and the other-1000 k Pa, which is the chamber that has higher Psi?

Question : Study thegivenfigurecarefullyandanswerthe followingquestions : (i)LabeltheParts maeked as(a),(b) ,( C) ,(d) and € (ii)giveonemajorfunctionof eachpart.

Question : Study the following statements and select the incorrect option.

Question : Study the following statements and select the incorrect one.

Question : Study the following plants, I. Hibiscus II Brassica III. Papaver IV. Annona V. Michelia VI. Rosa VII. Lotus. In how many plants the gynoecium is apocarpous and multicarpellary.

Question :Study the following in nitrogen cycle and identify A and B NH_3 overset((A))to NO_2^(-) overset(B)to NO_3^(-)

Question : Study the following flowchart and fill up the blanks by selecting the correct option.

Question : Study the following equation and name the reaction A and B. Glycogen in liverunderset(B) overset(A)hArr Glucose in blood

Question : Studythe following figure representingthe life cycle of a typical cnidarian and choose the correct option .

Question : Study the following given table and select the correct option that represents the letters.

Question : Study the figures given below and identify the option which represents correct grouping of the labelled figures A,B,C and D.

Question : Study the diagram given alongsideshowing a plant cell kept in a strong sugar solution. What will happen to this cell if it is kept in water?

Question : Study the diagram given alongsideshowing a plant cell kept in a strong sugar solution. Name the process the cell hasundergone. What is the reason of the processnamed?

Question : Study the diagram given alongsideshowing a plant cell kept in a strong sugar solution. Name the process the cell hasundergone.