22339 + Interview Questions in Biology in Class 11 Page 438 InterviewSolution

21851.	Question : A DNA segment in which both strands are labelled with ""^(15)N is transferred to ""^(14)N medium & allowed it to replicate 3 times. How many daughter molecules show both the strands with ""^(14)N
Answer» 6 4 2 1 Answer :A

Discussion

21852.	Question : A DNA segment has a total of 1000 nucleotides, out of which 240 are adenine containing nucleotides. How many pyrimidine bases this DNA segment possess?
Answer» Solution :Pyrimidine=500. According to Chargaff's RULE, A=T A=240, hence T=240, A+T=240+240=480 So, G+C=1000-480=520. G=C, THEREFORE, C=520/2=260. THUS, pyrimidine=C+T=260+240=500.

Discussion

21853.	Question : A distinctive feature of Aschelminthes is
Answer» incompletegut FLAME CELLS MUSCULAR pharynx pseudocoelom Answer :D

Discussion

21854.	Question : A distinct feature of bryophytes when compared to other green plants is that they
Answer» produce spores have sporophyte ATTACHED to GAMETOPHYTE lack XYLEM lack ROOTS

Discussion

21855.	Question : A disc like reduced stem is found in
Answer» Ginger Canna Onion Crocus Answer :C

Discussion

21856.	Question : A-disc
Answer» SOLUTION : An ISOTROPIC DISC (DARK BAND)

Discussion

21857.	Question : A diploid living organism develpos from zygote by which type of the following repeated cell divisions ?
Answer» Meiosis Amitosis Framentation Mitosis Answer :D

Discussion

21858.	Question : A diploid structure with a tough coat produced during unfavourable conditions is
Answer» zoospore zygote zygospore SPORE

Discussion

21859.	Question : A dikaryotic phase is most commonly seen in the life history of these fungi
Answer» Phycomycetes Deuteromycetes Basidomycetes All the above ANSWER :C

Discussion

21860.	Question : A dikaryophase is most commonly seen in the life history of these fungi
Answer» PHYCOMYCETES Deuteromycetes Basidiomycetes All the above ANSWER :C

Discussion

21861.	Question : A dikaryon is formed when (A) Meiosis is arrested (B) the two haploid cells do not fuse immediately (C) cytoplasm does not fuse (D) None of the above
Answer» MEIOSIS is arrested the two haploid cells do not fuse immediately cytoplasm does not fuse None of the above Solution :Dikaryon is a stage/PHASE of a CELL, in which, there are two nuclei. This condition arises, if fusion of cytoplasm (plasmogamy) is not immediately followed by fusion of nuclei (karyogamy). Karyogamy is delayed, it OCCURS just before meiosis. Dikaryon occurs in stage intervening between plasmogamy and karyogamy. Such cells are CALLED dikaryotic cells and the phase is called dikaryophase.

Discussion

21862.	Question : A dicot root can be identified by
Answer» EXARCH VASCULAR bundles endarch vascular bundles presence of numerous xylem bundles presence of LARGE pith Answer :A

Discussion

21863.	Question : A diagrammatic cross section of a single loop of human cochlea is shown in the given figure. Which one of the following options correctly represents the names of any three of the labelled parts ?
Answer» A-endolymph, B-techorial MEMBRANE, D-sensory HAIR CELLS A-perilymph, B-techorial membrane, C-endolymph B-tectorial membrane, C-perilymph, D-secretory cells A-serum, C-endolymph, D-sensory hari cells SOLUTION :NA

Discussion

21864.	Question : A detritus food chain in comparison to grazing food chain is
Answer» Equal Broader Longer Shorter Answer :D

Discussion

21865.	Question : A diagram of ear is given here.Identify the parts A to Hand select the correct option.
Answer» A-Temporal BONE, B-Malleus, C-Incus, D-Stapes, E-Cochlea, F-Eustachian TUBE, G-Tympanic MEMBRANE, H-External AUDITORY canal A-Tympanic membrane, B-Malleus, C-Incus, D-Stapes, E-Cochlea, F-Eustachian tube, G-Temporal bone, H-External auditory canal A-Tympanic membrane, B-Incus, C-Malleus, D-Stapes, E-Cochlea, F-Eustachian tube, G-Temporal bone, H-External auditory canal A-Temporal bone, B-Malleus, C-Incus, D-Cochlea, E-Stapes, F-Eustachian tube, G-Tympanic membrane, H-External auditory canal Solution :NA

Discussion

21866.	Question : (a)Describe the pressure flow hypothesis of translocation of sugar in plants. (b) Explain the mechanism of closing and opening of stomata.
Answer» Solution :(a) Refer POINTS to remember (b)Refer page 191, NCERT, TEXT BOOK of Biology for Class XI.

Discussion

21867.	Question : Nuclear envelope disappears at
Answer» more PERMEABLE to `NA^(+)` LESS permeable to `K^(+)` more permeable to both `Na^(+)` and `K^(+)` less permeable to both `Na^(+)` and `K^(+)`

Discussion

21868.	Question : A dense, white fibrous membrane covering a bone is referredto as the :
Answer» perichondrium LAMELLA PERIOSTEUM ENDOSTEUM SOLUTION :periosteum

Discussion

21869.	Question : (a) Define histochemistry. (b) What is Somatic pairing?
Answer» Solution :(a) The technique of staining the CELLS and tissue is CALLED histochemical staining or HISTO CHEMISTRY. (b) Maternal and paternal homologues remain associated side by side is called somatic pairing.

Discussion

21870.	Question : A decrease in blood pressure/volume will not cause the release of. ……………………………..
Answer» Atrial natriuretic FACTOR Aldosterone ADH RENIN SOLUTION :Atrial natriuretic factor

Discussion

21871.	Question : A : Dark reactionoccurs at night in stroma of chloroplast R : All the enzymes responsible of CO_(2) fixation remain inactive in presence of light.
Answer» A and R both are CORRECT and R is correct EXPLANATION of A. A and R are correct but R is not explanation of A. A is correct and R is FALSE. A and R are false Answer :D

Discussion

21872.	Question : A dangerous condition occurs is born out of,
Answer» MALE RH^+ and FEMALE Rh^+ Male Rh^+ and female Rh^- Male Rh^- and female Rh^+ Male Rh^- and female Rh^- ANSWER :B

Discussion

21873.	Question : A: Cytokinin helps in retention of chlorophyll and delayed senescence in leaves. R: Cytokinins only stimulate root initiation.
Answer» A and R both are CORRECT and R is correct explanation of A. A and R are correct but R is not explanation of A. A is correct and R is FALSE. A and R are false Answer :C

Discussion

21874.	Question : A cyclic process is occurring in C_3 plant, which is light dependent, and needs O_2 This process doesn't produce energy rather it consumes energy. (a) Can you name the given process? (b) Is it essential for survival? (c) What are the end products of this process? (d) Where does it occur?
Answer» Solution :(a) The name of the process is PHOTORESPIRATION. (B) No (C) CARBON dioxide. (d) Chloroplasts, peroxisomes and MITOCHONDRIA.

Discussion

21875.	Question : A cyclic process is occurring in C_(3) plant, which is light dependent and needs O_(2). This process doen't produce energy rather it consume energy. (a) Can you name the given process ? (b) Is it essential for survival ? (c )What are the end products of this process ? (d) Where does it occur ?
Answer» Solution :(a) Photorespiraiton is a process in which energy is used but is not PRODUCED. (b) It is not NECESSARY for survival of `C_(3)` PLANTS. (c ) It final product is `H_(2)O_(2)`. (d) There organelles take PART in it (1) Chloroplast (2) Peroxisome (3) Mitochondria

Discussion

21876.	Question : A cyclic process isoccurring inC_(3) plant,which is light dependent and needs O_(2). This processenergy rather it consumes energy(a) Can you name the given process ? (b) Is it essential for survival? ( c) What are the end products of this process ? (d) Where does it occur ?
Answer» Solution :(a) Photorespiration is the process, which do not produce energy rather consume it. It isnot needed for the SURVIVAL of`C_(3)` plant. ( c) The end PRODUCT of this process is `H_(2)O_(2)`. This process INVOLVES three cell ORGANELLES of the plant cell. (i) Chloroplast(ii) Peroxisome (iii) Mitochondria

Discussion

21877.	Question : A cyathium contains 37 flowers what is the ratio between number of microsporophylls and
Answer» 36:1 12:1 12:5 18:1 Answer :B

Discussion

21878.	Question : A cut plant wilts fast even if its cut end is dipped in water.
Answer» SOLUTION :An air BUBBLE is ENTERED from the cut end of the plant. Introduction of air bubbles in the xylem vessel BREAKS the continuity of water column. Thus, water is not available to the cut plant and it wilts fast even if its cut end is dipped in water.

Discussion

21879.	Question : A crow, an aquarium fish, and a dog were fed protein food. In which different forms would they excrete this nitrogenous water?
Answer» SOLUTION :Crow - Uric ACID, AQUARIUM fish - Ammonia. DOG - Urea.

Discussion

21880.	Question : A crow, an aquarium fish, and a dog were fed protein food. Why do they excrete so differently?
Answer» Solution :They excrete so DIFFERENTLY DEPENDING on the AVAILABILITY of WATER.

Discussion

21881.	Question : A cross section of a plant material shows the following features under the microscope : vascularbundles are radiallyarranged . These are four xylem strands showing exarch condition. What is this plant part?
Answer» ANSWER :DICOT ROOT

Discussion

21882.	Question : A cross section of a plant material shows the following features under the microscope. There are many vascular bundlesscattered in the parenchymatous tissue. Xylem is endarch. What kind of plant part shows the above anatomy.
Answer» ANSWER :MONOCOT STEM

Discussion

21883.	Question : A cross section of a plant material shows four xylem patches alternating with same number of phloem patches and in the xylem protoxylem is pointed towards periphery. In the centre of stele a small pith is present. The plant material is
Answer» YOUNG DICOT STEM Young dicot ROOT MONOCOT stem Monocot root Answer :B

Discussion

21884.	Question : A cricket player is fast chasing ball in the field.Which one of the following group of bones is directly contributing in this movement ?
Answer» FEMUR, malleus, tbia, metatarsals Pelvis, INCUS, petella, tarsal Sternum, femur, tibia,fibula Tarsal, femur, metatarsals,tibia Solution :Trasals, femur, metatarsals and tibia are bones of the legs which are involved in RUNNING during chasing the BALL by a cricket player.

Discussion

21885.	Question :A cranial nerve with maximum branches in the body is ……………………
Answer» Auditory Trigeminal VAGUS FACIAL SOLUTION :vagus

Discussion

21886.	Question : A corymb with zygomorphic flowers is found in
Answer» Acasia CASSIA PEA BOUGAINVILLEA ANSWER :B

Discussion

21887.	Question : A corolla of five petals with vexillary aestivation is said to
Answer» ligulate BILABIATE PERSONATE PAPILIONACEOUS Solution :papilionaceous

Discussion

21888.	Question : A: Cornea causes maximum refraction of light rays. This place the image approximately on retina. R : Cornea has a flat surface.
Answer» A and R both are correct and R is correct EXPLANATION of A. A and R are correct but R is not explanation of A. A is correct and R is FALSE. A and R are false ANSWER :C

Discussion

21889.	Question : "A contracted muscle becomes shorter and thicker but its volume remains the same". Identify two contractile proteins seen in muscle.
Answer» SOLUTION :ACTIN and MYOSIN

Discussion

21890.	Question : "A contracted muscle becomes shorter and thicker but its volume remains the same". Which theory explains the process of muscle contraction?
Answer» SOLUTION :SLIDING FILAMENT THEORY

Discussion

21891.	Question : A conjoint and open vascular bundle will be observed in the transverse section of
Answer» moncot root monocot stem dicot root dicot stem Solution :VASCULAR bundles which contains both XYLEM and phloem are CALLED conjoint vascular bundles contain both xylem, phloem and a strip of vascular cambium (between phloem and xylem of each vascular bundle) called intrafascicular (or fascicular) cambium. It produces secondary TISSUES. such vascular bundles are discribed as OPEN because the original or primary phloem and xylem separate on the production of secondary tissues by vascular cambium. thus conjoint and open vascular bundles will be observe in dicot stem.

Discussion

21892.	Question : A conjoint and open vascular bundle will be observed in the transverse section of (A) Monocot root (B) Monocot stem (C) Dicot stem (D) dicot root
Answer» Monocot root Monocot stem Dicot stem Dicot root Solution :Dicot stem When cambium is located between xylem and PHLOEM such a vascular BUNDLE is called open vascular BUNDLES. CONJOINT MEANS xylem and phloem are connected and arranged on the same radius.

Discussion

21893.	Question : A conjoint and open vascular bundle is observed in thetransverse section of ……….
Answer» SOLUTION :DICOT STEM

Discussion

21894.	Question : A condition in which internal environment of the body remains constant is
Answer» Hematoma Haemopoiesis HOMEOSTASIS HEMOSTASIS ANSWER :C

Discussion

21895.	Question : A condition in which body's internal environment remains nearly constant is called(a) haematoma(b) hermostasis(c) haemopoiesis(d) homeostasis
Answer» haematoma hermostasis haemopoiesis homeostasis

Discussion

21896.	Question : A condition in which a secondary parasite develops within a previously existing parasite is called.........
Answer» SOLUTION :Hyper-parasitism

Discussion

21897.	Question : A compound with almost similar structure to the substrate can act as a ………….
Answer» SOLUTION :COMPETITIVE INHIBITORS

Discussion

21898.	Question : A compound in which C,H,O exist in 1:2:1 ratio is called
Answer» Nucleotide Nucleoside Carbohydrate Protein Answer :C

Discussion

21899.	Question : A composite or multiple fruit develops from _____
Answer» Polycarpellary ovary Bicarpellary and SYNCARPOUS ovary Apocarpous ovary INFLORESCENCE Solution :Inflorescence

Discussion

21900.	Question : A component of phloem formed by end to end fusion of cells with perforated transverse walls.
Answer» SOLUTION :SIEVE TUBES

Discussion

Explore topic-wise InterviewSolutions in .

Question : A DNA segment in which both strands are labelled with ""^(15)N is transferred to ""^(14)N medium & allowed it to replicate 3 times. How many daughter molecules show both the strands with ""^(14)N

Question : A DNA segment has a total of 1000 nucleotides, out of which 240 are adenine containing nucleotides. How many pyrimidine bases this DNA segment possess?

Question : A distinctive feature of Aschelminthes is

Question : A distinct feature of bryophytes when compared to other green plants is that they

Question : A disc like reduced stem is found in

Question : A-disc

Question : A diploid living organism develpos from zygote by which type of the following repeated cell divisions ?

Question : A diploid structure with a tough coat produced during unfavourable conditions is

Question : A dikaryotic phase is most commonly seen in the life history of these fungi

Question : A dikaryophase is most commonly seen in the life history of these fungi

Question : A dikaryon is formed when (A) Meiosis is arrested (B) the two haploid cells do not fuse immediately (C) cytoplasm does not fuse (D) None of the above

Question : A dicot root can be identified by

Question : A diagrammatic cross section of a single loop of human cochlea is shown in the given figure. Which one of the following options correctly represents the names of any three of the labelled parts ?

Question : A detritus food chain in comparison to grazing food chain is

Question : A diagram of ear is given here.Identify the parts A to Hand select the correct option.

Question : (a)Describe the pressure flow hypothesis of translocation of sugar in plants. (b) Explain the mechanism of closing and opening of stomata.

Question : Nuclear envelope disappears at

Question : A dense, white fibrous membrane covering a bone is referredto as the :

Question : (a) Define histochemistry. (b) What is Somatic pairing?

Question : A decrease in blood pressure/volume will not cause the release of. ……………………………..

Question : A : Dark reactionoccurs at night in stroma of chloroplast R : All the enzymes responsible of CO_(2) fixation remain inactive in presence of light.

Question : A dangerous condition occurs is born out of,

Question : A: Cytokinin helps in retention of chlorophyll and delayed senescence in leaves. R: Cytokinins only stimulate root initiation.

Question : A cyclic process is occurring in C_3 plant, which is light dependent, and needs O_2 This process doesn't produce energy rather it consumes energy. (a) Can you name the given process? (b) Is it essential for survival? (c) What are the end products of this process? (d) Where does it occur?

Question : A cyclic process isoccurring inC_(3) plant,which is light dependent and needs O_(2). This processenergy rather it consumes energy(a) Can you name the given process ? (b) Is it essential for survival? ( c) What are the end products of this process ? (d) Where does it occur ?

Question : A cyathium contains 37 flowers what is the ratio between number of microsporophylls and

Question : A cut plant wilts fast even if its cut end is dipped in water.

Question : A crow, an aquarium fish, and a dog were fed protein food. In which different forms would they excrete this nitrogenous water?

Question : A crow, an aquarium fish, and a dog were fed protein food. Why do they excrete so differently?

Question : A cross section of a plant material shows the following features under the microscope : vascularbundles are radiallyarranged . These are four xylem strands showing exarch condition. What is this plant part?

Question : A cross section of a plant material shows the following features under the microscope. There are many vascular bundlesscattered in the parenchymatous tissue. Xylem is endarch. What kind of plant part shows the above anatomy.

Question : A cross section of a plant material shows four xylem patches alternating with same number of phloem patches and in the xylem protoxylem is pointed towards periphery. In the centre of stele a small pith is present. The plant material is

Question : A cricket player is fast chasing ball in the field.Which one of the following group of bones is directly contributing in this movement ?

Question :A cranial nerve with maximum branches in the body is ……………………

Question : A corymb with zygomorphic flowers is found in

Question : A corolla of five petals with vexillary aestivation is said to

Question : A: Cornea causes maximum refraction of light rays. This place the image approximately on retina. R : Cornea has a flat surface.

Question : "A contracted muscle becomes shorter and thicker but its volume remains the same". Identify two contractile proteins seen in muscle.

Question : "A contracted muscle becomes shorter and thicker but its volume remains the same". Which theory explains the process of muscle contraction?

Question : A conjoint and open vascular bundle will be observed in the transverse section of

Question : A conjoint and open vascular bundle will be observed in the transverse section of (A) Monocot root (B) Monocot stem (C) Dicot stem (D) dicot root

Question : A conjoint and open vascular bundle is observed in thetransverse section of ……….

Question : A condition in which internal environment of the body remains constant is

Question : A condition in which body's internal environment remains nearly constant is called(a) haematoma(b) hermostasis(c) haemopoiesis(d) homeostasis

Question : A condition in which a secondary parasite develops within a previously existing parasite is called.........

Question : A compound with almost similar structure to the substrate can act as a ………….

Question : A compound in which C,H,O exist in 1:2:1 ratio is called

Question : A composite or multiple fruit develops from _____

Question : A component of phloem formed by end to end fusion of cells with perforated transverse walls.