22339 + Interview Questions in Biology in Class 11 Page 406 InterviewSolution

20251.	Question : Bark of a tree consists of:
Answer» all DEAD TISSUES all tissues outside the vascular CAMBIUM all tissues outside the cork cambium the cork and SECONDARY cortex Solution :all tissues outside the cork cambium

Discussion

20252.	Question : Bark does not include
Answer» SECONDARY xylem secondary phloem periderm both a and b Answer :A

Discussion

20253.	Question : Banyas has _____ inflorescence.
Answer» HYPANTHODIUM Coenathium Mixed Inflorescence Cymose Solution :Hypanthodium

Discussion

20254.	Question : Bamboo or grass stem elongates by the activity of :
Answer» PRIMARY meristem apical MERISTEMS SECONDARY meristem INTERCALARY meristems Solution :intercalary meristems

Discussion

20255.	Question : Ball and socket joint is a___joint.
Answer» ANSWER :SHOULDER

Discussion

20256.	Question : Balbiani rings are the structural feature of
Answer» LAMPBRUSH chromosomes Polytene chromosomes Allosomes Autosomes Answer :B

Discussion

20257.	Question : Balanoglossus is commonly called as
Answer» EARTHWORM TAPEWORM LUGWORM ACORN worm Answer :D

Discussion

20258.	Question : Balanoglossus is a
Answer» CHORDATE vertebrate NON - chordate PROTOZOAN Answer :C

Discussion

20259.	Question : Bakanae's disease was first noticed by
Answer» F.W. WENT KUROSAWA Cocken Denny Solution :Kurosawa

Discussion

20260.	Question : Bactroids are
Answer» Enlarged non-motile celluar BACTERIA Rhizobium leguminosarum in root nodules of legumes A bacterial cell infected with viruses A motile bacterium Nitrosomonas bacteria in soil Solution :Bacteroid : SYMBIOTIC bacteria Rhizobium leguminosarum in leguminous plants e.g., gram pea ETC. in their ROOTS nodules produce Leg haemoglobin, this WHOLE Bacteria + Leg haemoglobin + Polypliode cells of roots is called as bacteroid.

Discussion

20261.	Question : Bacterization, deals with
Answer» The CULTURING of BACTERIA on suitable NUTRIENT media The seed DRESSING with nitrogen fixing bacteria The seed treatment with biopesticides The control of endo-pathogenic bacteria of PLANTS Answer :B

Discussion

20262.	Question : Bacteriocins are found in ……………
Answer» GENOPHORE PLASMIDS nucleiods MESOSOMES ANSWER :B

Discussion

20263.	Question : Bacterial ribosomes are of 70S type and very large in number making protoplasm granular. Then ribosomes occur as
Answer» POLYRIBOSOMES Dictyosomes Autosomes Mirosomes ANSWER :A

Discussion

20264.	Question :Bacterial disease in the following
Answer» CHIKUNGUNYA Rabies Encephalitis Plague Answer :D

Discussion

20265.	Question :Bacterial cells are examples of:
Answer» EUKARYOTIC CELLS PROKARYOTIC cells organs ORGANELLES SOLUTION :prokaryotic cells

Discussion

20266.	Question : Bacterial cell wall is composed of peptidoglycan, a complex of oligosaccharides and proteins. The oligosaccharide component consists of
Answer» LINEAR chain of alternating NAG and NAM linked by `ALPHA (1-4)` linkage linear chains of alternating NAG and NAM linked by `BETA (1-4)` linkage linear chain of glucose linked by `beta (1-4) ` linkage linear chain of glucose linked by `alpha (1-4)` linkage Answer :B

Discussion

20267.	Question : Bacterial blight of rice is caused due to
Answer» XANTHOMONAS oryzae Helminthosporium oryzae Pseudomonas falcatum Xanthomonas falcatum Answer :a

Discussion

20268.	Question : State whether the following statements are true or false.Bacterial and eukaryotic thylakoids are involved inphotosynthesis.
Answer» ANSWER :FALSE

Discussion

20269.	Question : Bacterial and eukaryotic flagella have the same structuremade of microtubules.
Answer» ANSWER :FALSE

Discussion

20270.	Question : Bacteria used in the curing of tea is………
Answer» Mycococcus candisans ESCHERICHIA coli Acetobacter aceti Srepstococcus lactis Answer :A

Discussion

20271.	Question : Bacteria used by Engelmann accumulated mainly in the region of
Answer» Blue Red Both (A) and (B) `CO_(2)` ANSWER :A::C

Discussion

20272.	Question : Bacteria have been put in the kingdom Monera because they are(a) unicellular(b) prokaryotes(c) microscopic(d) decomposers
Answer» unicellular prokaryotes microscopic decomposers

Discussion

20273.	Question : State whether th following statements are true or false. Bacteria and algae are prokaryotic cells.
Answer» ANSWER :TRUE

Discussion

20274.	Question : Bacillus thuringiensis (Bt) strains have been used for designing novel
Answer» Bio-metallurgical techniques Bioinsecticidal plants Bio-mineralization processes Biofertilizers Answer :B

Discussion

20275.	Question : (b) (i) Write any four points regarding Physiological effects of cytokinins. (ii) Define Vernalisation. (iii) In the above representation, what does P_(r) and P_("fr")stand for ?
Answer» Solution :(b) (i) Physiological effects of cytokinins : 1. Cytokinin promotes CELL division in the presence of auxin (IAA) 2. Cytokinin can break the dormancy of certain light-sensitive seeds like tobacco and induces seed germination 3. Cytokinin promotes the growth of lateral bud in the presence of apical bud 4. Cytokinin (i) increases rate of protein synthesis (ii) induces the formation of inter-fascicular cambium (iii) overcomes apical dominance (iv) induces formation of new leaves, chloroplast and lateral shoots. (ii) Vernalisation : Many species of biennials and perennials are induced to flower by low temperature exposure `(0^(@)C to 5^(@)C)`. This process is CALLED vernalization. The TERM vernalization was first used by T.D. Lysenko (1938). (iii) `P_(r)-` Phytochrome red (660 nm) `P_("fr")-` Phytochrome far red (730 nm)

Discussion

20276.	Question :Every mineral element that is present in a cell is needed by the cell. following statements are true? If false correct them:
Answer» SOLUTION :(B) The STATEMENT is FALSE.

Discussion

20277.	Question : Descrine the Floral characters of Allium cepa with a neat floral diagram.
Answer» Solution :(b) Floral CHARACTERS of Allium cepa : 1. Habit : Perennial herb with bulb. 2. Root : Fibrous adventitious root system 3. Stem : Underground bulb 4. Leaf : A cluster of radical leaves emerges from the underground bulb, cylindrical and fleshy having sheathy leaf bases with parallel venation. 5. Inflorescence : Scapigerous i.e. the inflorescence axis (peduncle) arising from the ground bearing a cluster of flowers at its apex. Pedicels are of equal length, arising from the apex of the peduncle which brings all flowers at the same level. 6. Flower : Small, white, bracteate, bracteolate, pedicellate, complete, trimerous, actinomorphic and hypogynous. Flowers are protandrous. 7. PERIANTH : Tepals 6, white, arranged in two WHORLS of three each, syntepalous showing valvate aestivation. 8. Androecium: Stamens 6, arranged in two whorls of three each, epitepalous, apostamenous/free and opposite to tepals. Anthers dithecous, basifixed, introse and dehiscing longitudinally. 9. Gynoecium : Tricarpellary and syncarpous. Ovary superior, trilocular with two ovules in each locule on axile placentation. STYLE SIMPLE, slender with simple stigma. 10. Fruit : A loculicidal capsule. 11.Seed: Endospermous 12. Floral Formula :

Discussion

20278.	Question : Azadirachta indica is an example for …………………………………
Answer» PSAMMOPHYTES MESOPHYTES lithophytes xerophytes Solution :mesophytes

Discussion

20279.	Question : Axon is a part of ........... (never cell, muscle cell)
Answer» SOLUTION :NEVER CELL

Discussion

20280.	Question : Axis vertebra is identified by
Answer» SIGMOID notch Deltoid ridge Odontoid PROCESS Centrum Answer :C

Discussion

20281.	Question : Axis developing between androecium and gynoecium is
Answer» Anthophore Androphore Gynophore Gynandrophore Solution :It is the THIRD elongated internode between androecium and GYNOECIUM e.g., Capparis and Gyanandropsis

Discussion

20282.	Question : Axillary bud is constituted by
Answer» LATERAL meristem, because axillary buds are LOCATED laterally Entire shoot APICAL meristem Some cells left behind from shoot apical meristem Secondary meristem Answer :C

Discussion

20283.	Question :Axile placentation is found in A) Fabaceae B) Solanaceae C) Liliaceae
Answer» A,B,C A,B B,C C,A Answer :C

Discussion

20284.	Question : Axial skeleton in made up of
Answer» SKULL and VERTEBRAL COLUMN girdles girdles and limbs skull, vertebral column, RIBS and STERNUM.

Discussion

20285.	Question : (a)When any dry plant material or seeds is/are kept in water, they swell up:-(a) Name the phenomenon involved in this change. (b)When any dry plant material or seeds is/are kept in water, they swell up:-(b) Define this phenomenon. (c )When any dry plant material or seeds is/are kept in water, they swell up:- (c) Give two conditions essential for the phenomenon to occur
Answer» Solution :(a) Imbibition. (B)Refer to ‘POINTS to REMEMBER.’ (c) CONDITION necessary to imbibition. (i) Water POTENTIAL between the absorbent and the liquid imbibed.(ii) Affinity between the adsorbent and the liquid imbibed.

Discussion

20286.	Question : (a)What is the significance of meiosis-I?(b)Why meiosis-II is necessary?Explain.
Answer» ANSWER :NA

Discussion

20287.	Question : AVN is called as pacemaker of heart.
Answer» ANSWER :FALSE

Discussion

20288.	Question : Aves originated from
Answer» theropod DINOSAURS osteolepids Eusthenopteron Archaeopteryx ANSWER :A

Discussion

20289.	Question : Aves originated during
Answer» Devonian PERIOD JURASSIC period Carboniferous period SILURIAN period ANSWER :B

Discussion

20290.	Question : Average pH of human urine is
Answer» 6 9 3 7

Discussion

20291.	Question : Average pH of human urine is:
Answer» 6 9 3 7 Answer :A

Discussion

20292.	Question : Average cardiac output is
Answer» 4 litres per MINUTE 6.3 litres per minute 5.3 litres per minute 7.3 litres per minute Solution :Cardiac output=stroke VOLUME `xx` venticular systole`//`minute `=70 "ml" xx 72 ("min") = 5040 "ml"//"min"` `="about" 5.5 "litres".`

Discussion

20293.	Question : Avena curvature test is bioassay for activity of
Answer» Auxin Ethylene Cytokinin Gibberellin Answer :A

Discussion

20294.	Question : AV node / SA node is pacemaker of heart.
Answer» ANSWER :SA NODE

Discussion

20295.	Question :AV valves are supported by ________
Answer» SOLUTION :CHORDAE tendineae

Discussion

20296.	Question : Av valve (Tricuspid) :
Answer» SOLUTION :Located between RIGHT atrium and right ventricle It separates right ventricle from right auricle / atrium

Discussion

20297.	Question : AV bundle is essential for the conduction of cardiac impulse because
Answer» it is present in the auriculoventricular septum it branches out to bundle of His it FORMS a CONTINUITY between ATRIAL and ventricular muscles none of the above SOLUTION : it forms a continuity between atrial and ventricular muscles

Discussion

20298.	Question : Auxins promot/inhibit flowering in pineapples.
Answer» SOLUTION :PROMOTES

Discussion

20299.	Question : Auxospores are found in diatom.
Answer» ANSWER :F

Discussion

20300.	Question : Auxins increase the height of the plant by
Answer» CELL division cell diferentiation cell elongation cell MATURATION

Discussion

Explore topic-wise InterviewSolutions in .

Question : Bark of a tree consists of:

Question : Bark does not include

Question : Banyas has _____ inflorescence.

Question : Bamboo or grass stem elongates by the activity of :

Question : Ball and socket joint is a___joint.

Question : Balbiani rings are the structural feature of

Question : Balanoglossus is commonly called as

Question : Balanoglossus is a

Question : Bakanae's disease was first noticed by

Question : Bactroids are

Question : Bacterization, deals with

Question : Bacteriocins are found in ……………

Question : Bacterial ribosomes are of 70S type and very large in number making protoplasm granular. Then ribosomes occur as

Question :Bacterial disease in the following

Question :Bacterial cells are examples of:

Question : Bacterial cell wall is composed of peptidoglycan, a complex of oligosaccharides and proteins. The oligosaccharide component consists of

Question : Bacterial blight of rice is caused due to

Question : State whether the following statements are true or false.Bacterial and eukaryotic thylakoids are involved inphotosynthesis.

Question : Bacterial and eukaryotic flagella have the same structuremade of microtubules.

Question : Bacteria used in the curing of tea is………

Question : Bacteria used by Engelmann accumulated mainly in the region of

Question : Bacteria have been put in the kingdom Monera because they are(a) unicellular(b) prokaryotes(c) microscopic(d) decomposers

Question : State whether th following statements are true or false. Bacteria and algae are prokaryotic cells.

Question : Bacillus thuringiensis (Bt) strains have been used for designing novel

Question : (b) (i) Write any four points regarding Physiological effects of cytokinins. (ii) Define Vernalisation. (iii) In the above representation, what does P_(r) and P_("fr")stand for ?

Question :Every mineral element that is present in a cell is needed by the cell. following statements are true? If false correct them:

Question : Descrine the Floral characters of Allium cepa with a neat floral diagram.

Question : Azadirachta indica is an example for …………………………………

Question : Axon is a part of ........... (never cell, muscle cell)

Question : Axis vertebra is identified by

Question : Axis developing between androecium and gynoecium is

Question : Axillary bud is constituted by

Question :Axile placentation is found in A) Fabaceae B) Solanaceae C) Liliaceae

Question : Axial skeleton in made up of

Question : (a)What is the significance of meiosis-I?(b)Why meiosis-II is necessary?Explain.

Question : AVN is called as pacemaker of heart.

Question : Aves originated from

Question : Aves originated during

Question : Average pH of human urine is

Question : Average pH of human urine is:

Question : Average cardiac output is

Question : Avena curvature test is bioassay for activity of

Question : AV node / SA node is pacemaker of heart.

Question :AV valves are supported by ________

Question : Av valve (Tricuspid) :

Question : AV bundle is essential for the conduction of cardiac impulse because

Question : Auxins promot/inhibit flowering in pineapples.

Question : Auxospores are found in diatom.

Question : Auxins increase the height of the plant by