22339 + Interview Questions in Biology in Class 11 Page 245 InterviewSolution

12201.	Question : Salt is added to preserve meat pickles etc. because salting kills bacteria by the process of
Answer» dissolution distillation plasmolusis imbibition. Solution :Plasmolysis is the characteristicfeature of living WALLED cells All living walled cells plasmolysis when kept in a HYPERTONIC solution Pickels. Meat and fish are preserved by salting Similarly, JAMS and jellies are preserved by sweetening with SUGARS Salting adn sweetening create hypertonic condition in which the fungi and batcteria get killed by plasmolysis

Discussion

12202.	Question : Salivation in mammals is under the control of
Answer» MEDULLA oblongata mesencephalon hypothalamus cerebellum Solution :NA

Discussion

12203.	Question : Salivary gland is ...............
Answer» Unicellular, GLANDULAR CELLS Multicellular, glandular cell Unicellular, SENSORY cells Multicellular, sensory cells Answer :C

Discussion

12204.	Question : Salivary amylase is also known as
Answer» GASTRIN PTYALIN glyoxylase PEPSIN SOLUTION :ptyalin

Discussion

12205.	Question : Salivary amylase hydrolyses.....
Answer» PROTEINS CARBOHYDRATE FATS VITAMINS SOLUTION :N/A

Discussion

12206.	Question : Saliva helps in the digestion of
Answer» FATS STARCH PROTEINS Vitamins Answer :C

Discussion

12207.	Question : Salivacontains enzyme …………….. .
Answer» ENTEROKINASE Ptyalin/Amylase CHYMOTRYPSIN LIPASE SOLUTION :N/A

Discussion

12208.	Question : Salient features of Arthropoda is ………………… .
Answer» AQUATIC and FREE living chitinous EXOSKELETON and JOINTED appendages radulla none of those Solution :chitinous exoskeleton and jointed appendages

Discussion

12209.	Question : Saltatory impulse transmission occurs through
Answer» THIN NERVE FIBRES thick nerve fibres myelinated fibres non myelinated fibres

Discussion

12210.	Question : The oral contraceptive saheli for females contains
Answer» INTERFERONS CORTICOSTEROIDS icosteroids centchroman prostaglandins ANSWER :C

Discussion

12211.	Question : Sago of Cycas is given to patients with stomach disorder because it is
Answer» with high nutritive value cheap EASILY digestible with less starch tastier Solution :SAGO of Cycas is GIVEN to patients with stomach DISORDER because it is easily digestible with less starch.

Discussion

12212.	Question : Sago is obtained from............
Answer» CYCAS revoluta Pinus roxburghii Pinus insularis Cedrus deodara Answer :A

Discussion

12213.	Question : Sago is obtained from ………………… .
Answer» CYCAS revoluta PINUS roxburghii Pinus insularis CEDRUS deodara ANSWER :A

Discussion

12214.	Question : SA node is located in
Answer» UPPER LATERAL wall of LEFT atrium lower lateral wall of left atrium lower lateral wall of RIGHT atrium upper lateral wall of right atrium Solution :upper lateral wall of right atrium

Discussion

12215.	Question : SA node is called the pacemaker of the heart because
Answer» it conducts the IMPULSE from AV node it INITIATES the cardiac impulse it is present in the right atrium it is made up of SPECIALISED MUSCLE fibres. Solution : it initiates the cardiac impulse

Discussion

12216.	Question : Rutaceae differs from Malvaceae in having
Answer» SIMPLE leaves Polypetalous corolla Syncarpous, SUPERIOR ovary Obdiplotemonous stamens Answer :D

Discussion

12217.	Question : Rusts and smuts belongs to (A) Deuteromycetes (B) Basidiomycetes (C) Ascomycetes (D) Phycomycetes
Answer» DEUTEROMYCETES Basidiomycetes ASCOMYCETES Phycomycetes ANSWER :B

Discussion

12218.	Question : Rust of wheat is produced by …….
Answer» ALBUGO candida PUCCINIA graminis tritici Candida albicans COLLETOTRICHUM SPS Answer :B

Discussion

12219.	Question : Rudimentary seed habit is found in
Answer» Selaginella Lycopodium Equisetum Adiantum Solution :Rudimentary SEED HABIT is found in Selaginella/Salvinia (heterosporous PTERIDOPHYTES)

Discussion

12220.	Question : Ruggerio et at., in 2015 proposed ………………kingdom classification.
Answer» 5 6 7 8 Answer :C

Discussion

12221.	Question : Rukaryotic cells divides every____hours.
Answer» 12 24 1 6 Solution :24

Discussion

12222.	Question : Rudolf Virchow (1855) :
Answer» Solution :He explained that CELLS divided and new cells are FORMED from pre-existing cells. He modified the HYPOTHESIS of cell THEORY.

Discussion

12223.	Question : RUBP + O_(2) overset(RUBSICO)to "Phosphoglycolate" + PGA . Theaboveequation representthe firststepof a cyclicpathways occuringin plantscells . (a)Namethe pathways. (b) Wheredoesthis pathwaysoccursinsidethe cell ? (c)How many carbon molecules are seen in RUBP & PGA. (d) Statethe roleof RUBISCOin this step . (e)Underwhichcondition doesthis pathway proceed.
Answer» Solution :(a) Photorespirationor `C_(2)`CYCLE. (b) `C_(2)`cycletakes PLACE in chloroplast ,peroxisomeand mitochondriom. (c) RUBP is a 5C COMPOUND and PGA is a 3C compoud . (d) RUBISCO playsthe roleof oxygenaseenzyme . (e) `C_(2)`cycleoccurs in photosyntheticcells due to abssenceof `CO_(2)`and INCREASED `O_(2)`.

Discussion

12224.	Question :RuBP : Ribulose 1,5 biphosphate :: PGA : .............
Answer» SOLUTION :Phosphoglyceric ACID

Discussion

12225.	Question : RUBPisa …………carbon compound.
Answer» THREE FOUR FIVE Seven Answer :C

Discussion

12226.	Question : RuBP carboxylase, PEPcase, pyruvate dehydrogenase, ATPase, cytochromeoxidase, hexokinase, lactate dehydrogenase. Select/choose enzymes fromthe list above whichare involved in (a) Photosynthesis (b) Respiration (c) Bothin photosynthesis and respiration
Answer» Solution :RuBP Carboxylase : It is useful in dark reaction which does fixation of `CO_(2) i n C_(3)` pathway. PEPcase : It is useful for fixation of `CO_(2)` in photosynthesis in `C_(4)`pathway. SO 4C oxalo acetateis formed. Pyruvate : It is useful in aerobicrespiration, whichforms Acetyl. CO-A from pyruvic acid Pyruvic acid + Co-A + NAD`+ UNDERSET("Pyruvate dehydrogenase ")overset(MG^(+2))to "Acetyl "Co-A + CO_(2) + NADH + H^(+)` ATPase : It is useful in both respiration and photosynthesis. In both processes, it is associated with proton pump in electron transport system . ATP is formed by ATPaseby transportof proton. Cytochrome oxidase : It is ALSO useful in respiration and photo synthesis. It is an `e^(-)` carriers substance. Hexokinase : It is useful in glycolysisin respiration. By the glucose 6 phosphate is formed from glucose during that one ATP is used. Lactate dehydrogenase : It is useful in anaerobic respiration . eg. Lactobacillus Pyruvic acid + NADH ` underset("dehydrogenase ")overset("Lactate") to C_(3) H_(6) O_(3) + NDA`

Discussion

12227.	Question : RuBP carboxylase. In the presence of high concentration of ……..... act as oxygenase.
Answer» SOLUTION :OXYGEN,

Discussion

12228.	Question : Rubisco is the most abundant enzyme in the world and present in very high concentration in chloroplasts. It is required in very high concentration for photosynthesis because it :
Answer» is a very slow acting enzyme Also ACTS as an oxygenase CATALYSES a REVERSIBLE reaction Is degraded very rapidly Answer :A

Discussion

12229.	Question : RUBISCO is most abundant / least enzyme in the world.
Answer» ANSWER :ABUNDANT

Discussion

12230.	Question : RUBISCO is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RUBISCO carries out more carboxylation in C_(4) aplants?
Answer» Solution :RUBISCO is the most abundant enzyme in the world and can bind to both `CO_(2) and O_(2)`on its active sites. RUBISCO has much GREATER affinity for `CO_(2)`than` O_(2),` This binding is competitive. It depends on the relative concentration of `O_(2) andCO_(2)`and that determines which of the TWO will bind the enzyme. In `C_(4)`PLANTS the photorespiration does not take place. Also the plants have a mechanism due to which `CO_(2)`concentration at enzyme site increases. This is due to SPLITTING of `C_(4)`acid in mesophyll leading to RELEASE of `CO_(2),` thereby increasing the concentration of `CO_(2).` This increases the carboxylase activity of RUBISCO, and decreases the oxygenase activity.

Discussion

12231.	Question : Ruben & Kamen used…….radioactiveoxygen to prove evolutionof oxygenfrom water .
Answer» `""^(18)O` `""^(16)O` `""^(14)O` `""^(12)O` ANSWER :A

Discussion

12232.	Question : Rubber is a ……………
Answer» Latex Resin Alkaloid Drug Answer :A

Discussion

12233.	Question : rRNA is associated with ...
Answer» SOLUTION :RIBOSOMES

Discussion

12234.	Question : rRNA constitutes____of total RNA.
Answer» 0.2 0.7 0.8 0.15 Solution :0.8

Discussion

12235.	Question : R.Q. is less than one when aerobic respiration takes place in fats or proteins.
Answer» Solution :In FATS and proteins NUMBER of molecules of `CO_(2)` RELEASED are less than number of OXYGEN molecules consumed.

Discussion

12236.	Question : RQ :
Answer» ANSWER :RESPIRATORY QUOTIENT.

Discussion

12237.	Question : Royal Botanical Garden, Kew is located in
Answer» GERMANY France ENGLAND INDIA Answer :C

Discussion

12238.	Question : Royal botanical garden is located at
Answer» NEW delhi Kolkata Kew, England Lucknow Answer :C

Discussion

12239.	Question : Roundworm differ from flatworms by the presence of
Answer» FLAME cells acoelom complete segmented body Answer :C

Discussion

12240.	Question : Rouleaux is a roll of
Answer» WBC Platelets RBC All the above ANSWER :C

Discussion

12241.	Question : Rough texture of outer nuclear membrane is due to the presence of
Answer» RER SER Nuclear PORES RIBOSOMES ANSWER :D

Discussion

12242.	Question : Rough ER is associated with
Answer» RIBOSOMES Nucleus Mesosomes Peroxysomes ANSWER :A

Discussion

12243.	Question : Rotenone, a natural insecticide, is obtained from
Answer» AZADIRACHTA indica Derris sp. Bacillus thuringiensis Phytophthora palmivora Answer :B

Discussion

12244.	Question : ROS stands for ............. .
Answer» REDUCTION OXYGEN Species Reactive Oxygen Syndrome Reducive Oxygen Species Reactive Oxygen Species Answer :A::C::D

Discussion

12245.	Question : Rosa species plants are not eaten by herbivores. Why ?
Answer» SOLUTION :Rosa species plants develop Prickles. Prickles are small, sharp structure which are the OUTGROWTHS from epidermal cells of stem or leaf. It helps the plant in scrambling over other plants. It is also protective against HERBIVORY.

Discussion

12246.	Question :Roots that grow from any part of the plant body other thanthe radicle are called :
Answer» TAP ROOTS ADVENTITIOUS roots PROP roots epiphytic roots

Discussion

12247.	Question : Roots show one of the following features :
Answer» EXOGENOUS ORIGIN endogenous origin presence of LEAVES and buds differentiated into NODES and internodes Solution :exogenous origin

Discussion

12248.	Question :''Roots perform photosynthesis'' - Justify with example.
Answer» Solution :ROOTS of some climbing or epiphytic PLANTS develop chlorophyll and tum green which help in photosynthesis. These roots are CALLED as PHOTOSYNTHETIC roots.e.g. Tinospora.

Discussion

12249.	Question : Roots obtain oxygen from air in the soil for respiration.In the absence or deficiency of oxygen (O_2), root growth is restricted or completely stopped. How do the plants growing in swamps obtain their oxygen required for root respiration?
Answer» SOLUTION :By PNEUMATOPHORES

Discussion

12250.	Question : Roots of the Cycas are
Answer» Caoralloid SIMPLE Both A and B None of the above Solution :Roots of the Cycas are both CORALLOID and simple.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Salt is added to preserve meat pickles etc. because salting kills bacteria by the process of

Question : Salivation in mammals is under the control of

Question : Salivary gland is ...............

Question : Salivary amylase is also known as

Question : Salivary amylase hydrolyses.....

Question : Saliva helps in the digestion of

Question : Salivacontains enzyme …………….. .

Question : Salient features of Arthropoda is ………………… .

Question : Saltatory impulse transmission occurs through

Question : The oral contraceptive saheli for females contains

Question : Sago of Cycas is given to patients with stomach disorder because it is

Question : Sago is obtained from............

Question : Sago is obtained from ………………… .

Question : SA node is located in

Question : SA node is called the pacemaker of the heart because

Question : Rutaceae differs from Malvaceae in having

Question : Rusts and smuts belongs to (A) Deuteromycetes (B) Basidiomycetes (C) Ascomycetes (D) Phycomycetes

Question : Rust of wheat is produced by …….

Question : Rudimentary seed habit is found in

Question : Ruggerio et at., in 2015 proposed ………………kingdom classification.

Question : Rukaryotic cells divides every____hours.

Question : Rudolf Virchow (1855) :

Question :RuBP : Ribulose 1,5 biphosphate :: PGA : .............

Question : RUBPisa …………carbon compound.

Question : RuBP carboxylase, PEPcase, pyruvate dehydrogenase, ATPase, cytochromeoxidase, hexokinase, lactate dehydrogenase. Select/choose enzymes fromthe list above whichare involved in (a) Photosynthesis (b) Respiration (c) Bothin photosynthesis and respiration

Question : RuBP carboxylase. In the presence of high concentration of ……..... act as oxygenase.

Question : Rubisco is the most abundant enzyme in the world and present in very high concentration in chloroplasts. It is required in very high concentration for photosynthesis because it :

Question : RUBISCO is most abundant / least enzyme in the world.

Question : RUBISCO is an enzyme that acts both as a carboxylase and oxygenase. Why do you think RUBISCO carries out more carboxylation in C_(4) aplants?

Question : Ruben & Kamen used…….radioactiveoxygen to prove evolutionof oxygenfrom water .

Question : Rubber is a ……………

Question : rRNA is associated with ...

Question : rRNA constitutes____of total RNA.

Question : R.Q. is less than one when aerobic respiration takes place in fats or proteins.

Question : RQ :

Question : Royal Botanical Garden, Kew is located in

Question : Royal botanical garden is located at

Question : Roundworm differ from flatworms by the presence of

Question : Rouleaux is a roll of

Question : Rough texture of outer nuclear membrane is due to the presence of

Question : Rough ER is associated with

Question : Rotenone, a natural insecticide, is obtained from

Question : ROS stands for ............. .

Question : Rosa species plants are not eaten by herbivores. Why ?

Question :Roots that grow from any part of the plant body other thanthe radicle are called :

Question : Roots show one of the following features :

Question :''Roots perform photosynthesis'' - Justify with example.

Question : Roots obtain oxygen from air in the soil for respiration.In the absence or deficiency of oxygen (O_2), root growth is restricted or completely stopped. How do the plants growing in swamps obtain their oxygen required for root respiration?

Question : Roots of the Cycas are