22339 + Interview Questions in Biology in Class 11 Page 226 InterviewSolution

11251.	Question : The alpha cells of islets of langerhans secrete ......
Answer» SOLUTION :(GLUCAGON)

Discussion

11252.	Question : The all-or-none principle states that
Answer» A) the PROPERTIES of an action potential are independent of the strength of the depolarising stimulus B) all STIMULI will produce action POTENTIALS C) all graded potentials will generate action potential D) any cell membrane can generate and propagate an action potential if STIMULATED to threshold

Discussion

11253.	Question : The alkaloid, colchicine, used in biological laboratories toinduce polyploidy is extracted from the :
Answer» CORMS of COLCHICUM luteum leaves of Phormium tenax ROOTS of WITHANIA somnifera stems of Glycyrrhiza glabra Solution :corms of Colchicum luteum

Discussion

11254.	Question : The alimentary canal of nematodes has
Answer» only MOUTH only ANUS mouth and anus no INTESTINE

Discussion

11255.	Question : The alimentary canal of frog is short because, it is a
Answer» HERBIVORE OMNIVORE FRUGIVORE CARNIVORE ANSWER :D

Discussion

11256.	Question : The alga Chara is called stonewort because its plant body is encrusted with
Answer» CALCIUM BICARBONATE Calcium carbonate Calcium chloride Calcium OXALATE Answer :B

Discussion

11257.	Question : The age of a tree can be determined with the help of …………..
Answer» SOLUTION :ANNUAL RINGS

Discussion

11258.	Question : The affect ofapical dominance can be overcome by which of the following hormone:
Answer» IAA Ethylene Gibberellin Cytokinin Answer :D

Discussion

11259.	Question : The affect of apical dominance can be overcome by which of the following hormone ?
Answer» IAA Ethylene GIBBERELLIN CYTOKININ Solution :Cytokinin

Discussion

11260.	Question :The aestivation of corolla in pea flowers is called
Answer» Valvate Contorted IMBRICATE Vexillary Answer :D

Discussion

11261.	Question : The additional chambers in the digestive tract of birds are
Answer» CROP and cloaca GIZZARD and cloaca crop and gizzard INTESTINE and crop ANSWER :C

Discussion

11262.	Question : The actual process of respiration occurs in protoplasmof the cell.
Answer» Solution :The respiratory substrate like glucose undergoes combustion and PYRUVIC acidis produced by glycolysis. Pyruvic acid enters mitochondria to TAKE place KREBS. CYCLE and oxidative phosphorylation. Where respiratorysubstrateis completelyoxidised and energyis producedin the FORM of ATP

Discussion

11263.	Question : The activity of cambium is under the control of
Answer» Enivronmental FACTORS PHYSIOLOGICAL factors Both A and B NONE of the above Solution :The ACTIVITY of CAMBIUM is under thecontrol of environmental and physiological factors

Discussion

11264.	Question : The action potential occurs in respnse to a threshold stimulus, but not at sub threshold stimuli. What is the name of the principle involved ?
Answer» SOLUTION :All or NONE PRINCIPLE.

Discussion

11265.	Question : The ............. acting on agglutinogen B is called anti B.
Answer» SOLUTION :AGGLUTININ

Discussion

11266.	Question : The accompanying figure shows reabsorption of some constituents of glomerular filtrate in different parts of mammalian nephron. What can these constituents be?
Answer» `A-Na^(+),B-"Water",C-"UREA"` A-Urea, `B-Na^(+)`, C-Water A-Water , B-`Na^(+)`,C-Urea A-`Na^(+)`,B-urea, C-water Solution :Graph A is for `Na^+`, as the `Na^+` PASSES through proximal TUBULE, it's absorption increases. About 60% of `Na^(+)` from glomerular filtrate is absorbed here. Loop of HENLE is divided into two parts: (i) descending limb and (ii) ascending limb. Descending lib is impermeable but ascending limb is permeable for `Na^(+).Na^+` reabsorption again increases in distal convoluted tubule under the influence of aldosterone. its absorption also occur in collecting duct but itstabilises here. Graph B is for water. Much of the water is absorbed in proximal tubule. Descending lib of loop of Henle is permeable but ascending limb of loop of Henle is impermeable to water. As the water passes through distal tubule and collecting duct its absorption increases. Graph C is for urea. much of the urea is absorbed in proximal tubule. Descending limb is impermeable but ascending limb is partially permeable to urea. As it passes through in proximal tubule. Descending limb is impeable to urea. As it passes through distal and collecting tubule its absorption also increases.

Discussion

11267.	Question : The accumulation of uric acid crystals in the region of joints resulting in painful movements causes
Answer» Fluorodosis gout arthritis rheumatoid arthritis Solution :Gout is inflammation of joints due to ACCUMULATION of uric ACID crystals. This RESULT in PAINFUL MOVEMENTS.

Discussion

11268.	Question : The acrosome is formed from __________ .
Answer» SOLUTION :GOLGI BODY

Discussion

11269.	Question : The accessory gland present in male cockroach is
Answer» SEMINAL VESICLE collaterial GLAND phallomeres mushroom SHAPED gland ANSWER :D

Discussion

11270.	Question : The above structure represents a …………………
Answer» POLYNUCLEOTIDE AMINO ACID NUCLEOSIDE Nucleotide Answer :D

Discussion

11271.	Question : The above diagram shows the germs layer. The animals having structures shown in the figure. (A) and (B) are respectively called.
Answer» Diphoblastic, Triploblastic Triploblastic, diploblastic Diploblastic, Diploblastic Triphoblastic, Triphoblastic Answer :A

Discussion

11272.	Question : The above diagram shows some stages in microgametogenesis.Identify A, B and C
Answer» A - Symmetric spindleB - GENERATIVE cell, C VEGETATIVE cell A - Symmetric SPINDLE, B - Vegetative cell, C Generative cell A - Asymmetric spindle, B - Vegetative cell, C Generative cell A - Asymmetric spindle, B - Generative cell, C Vegetative cell ANSWER :3

Discussion

11273.	Question : State whether the following statement is true or false. The ability of plasma membrane to engulf macromoleculesis known as pinocytosis. A. TrueB. False
Answer» ANSWER :FALSE

Discussion

11274.	Question : In the figure, masses m_(1), m_(2) and M are 20kg, 5kg, and 50kg respectively. The coefficient of friction between M and ground is zero. The coefficient of friction between m_(1) and M and that between m_(2) and ground is 0.3. The pulleys and the strings are massless. The string is perfectly horizontal between P_(1) and m_(1) also between P_(2) and m_(2). The string is perfectly vertical between P_(1) and P_(2). An external horizontal force F is applied to the mass M. Let the magnitude of the force of friction between m_(1) and M be f_(1) and that between m_(2) and ground be f_(2). For a particular F it is found that f_(1) = 2f_(2). [Take g = 10 m/s^(2)] (i) Findf_(1)in Newton (ii) Find f_(2)in Newton (iii) Find F in Newton (iv) Find tension in the string in Newton (v) Find acceleration of the masses inm//s^(2)
Answer» ANSWER :TRUE

Discussion

11275.	Question : The 8th, 9th and 10th pairs of ribs are called .............ribs.
Answer» SOLUTION : FLASE /vertebro-chondral

Discussion

11276.	Question : The 80S ribosome has two sub units which are
Answer» A) 30S and 50S B) 40S and 60S C) 40S and 40S D) 20S and 60S Answer :B

Discussion

11277.	Question : The 3^(rd),6^(th) and 11^(th) cranial nerves are respectively
Answer» oculomotor, ABDUCENS and accessory oculomotor, TRIGEMINAL and accessory optic, FACIAL and accessory trochlear, abducens and vagus. Solution :NA

Discussion

11278.	Question : The 3.-5. phosphodiester linkages inside a polynucleotide chain serve to join
Answer» One DNA strand with the other DNA strand One nucleoside with ANOTHER NUCLEOTIDE One nucleotide with another nucleotide One NITROGENOUS base with PENTOSE sugar Answer :B

Discussion

11279.	Question : The 11th and 12th pairs of ribs are called as ........... ribs.
Answer» SOLUTION :FLOATING /VERTEBRAL

Discussion

11280.	Question : Thallus is flattened, leaf like and anchors to the rocks with the help of holdfast in
Answer» LAMINARIA POLYSIPHONIA Batrachospermum ECTOCARPUS ANSWER :A

Discussion

11281.	Question : Thallus is an unbranched filament in this algae
Answer» Spirogyra Chlamydomonas Cladophora Dictyota Answer :A

Discussion

11282.	Question : Thallospores are produced by ……………….
Answer» ASPERGILLUS Erysiphe SACCHAROMYCES FUSARIUM ANSWER :B

Discussion

11283.	Question : Thallus of the Marchantia is
Answer» DORSIVENTRAL Isobilateral Both A and B None of the above Solution :THALLUS of the MARCHANTIA is dorsiventral

Discussion

11284.	Question : Thalloid plant body shows parts like holdfast, stipe and frond in this class of algae
Answer» PHAEOPHYCEAE Chlorophyceae Rhodophyceae CYANOPHYCEAE ANSWER :A

Discussion

11285.	Question : Thalamus (torus/receptacle) is condensed end of floral axis on which floral leaves are inserted. This thalamus represents
Answer» 4 internodes 3 internodes 2 internodes 1 internodes Answer :B

Discussion

11286.	Question : Tetradynamous condition of the androecium is a characteristic feature of the family :
Answer» BRASSICACEAE FABACEAE POACEAE MALVACEAE SOLUTION :Brassicaceae

Discussion

11287.	Question : Testosterone is secreted by
Answer» sertoli cells leydig cells spermatogenic cells all of the above

Discussion

11288.	Question : Testes of cockroach are present in abdomen at
Answer» dorsal side of 4TH to 6th segment VENTRAL side of 4-6th segments LATERAL sides of 4th to 6th abdominal segments all the above Answer :C

Discussion

11289.	Question : Testes are attached to dorsal body wall of kidney by
Answer» MESOVARIUM MESORCHIUM MESOTHELIUM all the above ANSWER :B

Discussion

11290.	Question : Testa of a seed is produced from
Answer» OVARY wall hilum OUTER INTEGUMENT of ovule funicle Answer :C

Discussion

11291.	Question : Tessellated epithelium is
Answer» SIMPLE SQUAMOUS simple cuboidal Simple COLUMNAR Transitional ANSWER :A

Discussion

11292.	Question : Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why ?
Answer» Solution :Ammonotellic animals EXCRETE ammonia along with a large quantity of water. Ammonia is highly TOXIC and is SOLUBLE in water. So all ammonotelic animals are aquatic. But terrestial ureotelie-animals are mainly ureotelic or uricotelic because they NEED only very little water for excretion. i.e., TERRESTRIAL animals have to conserve water and cannot lose more water from their body.

Discussion

11293.	Question : Terrestrial animals are either ureotelic or uricotelic not ammonotelic. Evaluate the statement.
Answer» Solution :Terrestrial animals do not have SURPLUS SUPPLY of water. AMMONOTELIC over NEED abundant supply of water.

Discussion

11294.	Question : Terminal leaflets are not involved inphotosynthesis in
Answer» Wild pea Sweet pea GARDEN pea CHICK pea Answer :C

Discussion

11295.	Question : Terminalisation of chiasmata occurs at ............ .
Answer» Zygotene Leptotene Diakinesis Pachytene Answer :C

Discussion

11296.	Question : Terminal leaflets are modified into tendrils in
Answer» PISUM Bean Pumpkin GRAPEVINE ANSWER :A

Discussion

11297.	Question : Term meristem was coined by
Answer» Nageli Hanstein HOFMEISTER Schmidt Answer :A

Discussion

11298.	Question : Term meiosis was proposed by
Answer» FARMER and Moore Flemming Strasburger Darlington Answer :A

Discussion

11299.	Question : Term basal body is associated with the development of
Answer» CILIA and flagella cell plate phragrnoplast Kinetocore Answer :A

Discussion

11300.	Question : Tendrils of grapevines are homologous to the tendril of pumpkins but are analogous to that of pea . Justify the above statement.
Answer» Solution :Homologous ORGANS : In homologous organs origin is same. They are different in FUNCTIONS means axillary bud is modified into tendril in grape and WATERMELON means homologous while analogous organs origins are different but functions are alike. Leaf is modified into tendril in peas and functions for climbing in the plant. Hence in peas the origin of tendril is different but its function is same as STEM tendril of grape. For SEE diagram section - A , Q. No. 6 ( B )

Discussion

Explore topic-wise InterviewSolutions in .

Question : The alpha cells of islets of langerhans secrete ......

Question : The all-or-none principle states that

Question : The alkaloid, colchicine, used in biological laboratories toinduce polyploidy is extracted from the :

Question : The alimentary canal of nematodes has

Question : The alimentary canal of frog is short because, it is a

Question : The alga Chara is called stonewort because its plant body is encrusted with

Question : The age of a tree can be determined with the help of …………..

Question : The affect ofapical dominance can be overcome by which of the following hormone:

Question : The affect of apical dominance can be overcome by which of the following hormone ?

Question :The aestivation of corolla in pea flowers is called

Question : The additional chambers in the digestive tract of birds are

Question : The actual process of respiration occurs in protoplasmof the cell.

Question : The activity of cambium is under the control of

Question : The action potential occurs in respnse to a threshold stimulus, but not at sub threshold stimuli. What is the name of the principle involved ?

Question : The ............. acting on agglutinogen B is called anti B.

Question : The accompanying figure shows reabsorption of some constituents of glomerular filtrate in different parts of mammalian nephron. What can these constituents be?

Question : The accumulation of uric acid crystals in the region of joints resulting in painful movements causes

Question : The acrosome is formed from __________ .

Question : The accessory gland present in male cockroach is

Question : The above structure represents a …………………

Question : The above diagram shows the germs layer. The animals having structures shown in the figure. (A) and (B) are respectively called.

Question : The above diagram shows some stages in microgametogenesis.Identify A, B and C

Question : State whether the following statement is true or false. The ability of plasma membrane to engulf macromoleculesis known as pinocytosis. A. TrueB. False

Question : The 8th, 9th and 10th pairs of ribs are called .............ribs.

Question : The 80S ribosome has two sub units which are

Question : The 3^(rd),6^(th) and 11^(th) cranial nerves are respectively

Question : The 3.-5. phosphodiester linkages inside a polynucleotide chain serve to join

Question : The 11th and 12th pairs of ribs are called as ........... ribs.

Question : Thallus is flattened, leaf like and anchors to the rocks with the help of holdfast in

Question : Thallus is an unbranched filament in this algae

Question : Thallospores are produced by ……………….

Question : Thallus of the Marchantia is

Question : Thalloid plant body shows parts like holdfast, stipe and frond in this class of algae

Question : Thalamus (torus/receptacle) is condensed end of floral axis on which floral leaves are inserted. This thalamus represents

Question : Tetradynamous condition of the androecium is a characteristic feature of the family :

Question : Testosterone is secreted by

Question : Testes of cockroach are present in abdomen at

Question : Testes are attached to dorsal body wall of kidney by

Question : Testa of a seed is produced from

Question : Tessellated epithelium is

Question : Terrestrial animals are generally either ureotelic or uricotelic, not ammonotelic, why ?

Question : Terrestrial animals are either ureotelic or uricotelic not ammonotelic. Evaluate the statement.

Question : Terminal leaflets are not involved inphotosynthesis in

Question : Terminalisation of chiasmata occurs at ............ .

Question : Terminal leaflets are modified into tendrils in

Question : Term meristem was coined by

Question : Term meiosis was proposed by

Question : Term basal body is associated with the development of

Question : Tendrils of grapevines are homologous to the tendril of pumpkins but are analogous to that of pea . Justify the above statement.