22339 + Interview Questions in Biology in Class 11 Page 297 InterviewSolution

14801.	Question : Mitochondria and chloroplasts have their own DNA (genetic material). What is known about their fate during nuclear division like mitosis ?
Answer» Solution : DNA PRESENT in MITOCHONDRIA and chloroplasts is GENOMIC DNA. It has no relation with KARYOKINESIS, only nuclear DNA takes part in mitosis.

Discussion

14802.	Question : Mitochondria and chloroplast are (a) semi-autonomous organelles (b) formed by division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery Which one of the following options is correct?
Answer» both (a) and (B) are correct (b) is TRUE but (a) is FALSE (a) is true but (b) is false both (a) and (b) are false Answer :C

Discussion

14803.	Question : Mitochondria :
Answer» are involved in CELLULAR RESPIRATION contain grana and cristae break down ATP to release energy for cells all of the above are CORRECT SOLUTION : are involved in cellular respiration

Discussion

14804.	Question : Minimum number of archegonia seen in female gametophyte of gymnosperms is
Answer» one two eight six Answer :B

Discussion

14805.	Question : Minimum diversity is found in
Answer» MOSS stage Climax COMMUNITY PIONEER community Seral community Answer :C

Discussion

14806.	Question : Minerals are present in the soil in sufficient amounts. Do plants need to adjust the type of solutes that reach the xylem? Which molecules help to adjust this? How do plants regulate the type and quantity of solutes that reach xylem ?
Answer» Solution :Yes, plants need to adjust the type and quantity of solutes that reach the xylem. The transport proteins of endodermal cell help in maintaining and adjusting solute movement. As the minerals are present in SOII as charged particles with a very low concentration as compared of roots, they, all cannot be completely passively transorted across cell membranes of root hairs. THUS, minerals are transported both by active and PASSIVE processes, to the xylem. Upon reaching xylem, they are further transported, i.e., upwards to sinks through transpiration steam. At the sink regions mineral ions are unloaded through diffusion and active uptake by receptor cells. Some of the mineral ions moving frequently through xylem are (i) Nitrogen tranvels in plants as inorganic ions `NO_(2)` and `NO_(3)` but much of the nitrogen moves in the found of amino acids and related organic compounds. (ii) Sulphur and Phosphorus small amount of these two nutrients are carried in organic forms. (iii) Mineral ions are freuently remobilised particularly from older senescing parts. Older dying leaves export much of their mineral content to younder leaves. Similarly, before LEAF falls in decidous plants, minerals are REMOVED to other parts. Elements most readily mobilised are phosphorus, sulphur, nitogen and potassium. Some elements that are structural components like calcium are not remobilised.

Discussion

14807.	Question : Minerals are present in the soil in sufficient amounts. Do plants need to adjust the types of solutes that reach the xylem? Which molecules help to adjust this? How do plants regulate the type and quantity of solutes that reach xylem?
Answer» Solution :Adjustment of solutes occur by:(i) By active absorption of minerals. (ii) XYLEM parenchyma also takes PART in xylem loading. It bears pump and ion channels. (iii) Endodermis bears passage cells for the entrance of minerals into xylem. (IV) EASILY mobilised elements are phosphorus, sulphur, nitrogen and POTASSIUM.

Discussion

14808.	Question : Minerals are present in the soil in sufficient amounts. Do plants need to adjust the type of solutes that reach the xylem ? Which molecules help to adjust this ? How do plants regulate the type and quantity of solutes that reach xylem ?
Answer» SOLUTION :Yes the plant ADJUSTS the QUANTITY and types of solutes that reach the xylem. The protein present in cells of endodermis helps for this type of adjustment Compared to roots, mineral ions present in soil are of low CONCENTRATION. They all do not completely pass through cell wall of root hair. This way mineral salts are transported till xylem through active transport and passive transport. After reaching to xylem they move to required parts in upward direction. Where mineral ions enter into symport through diffusion and become active by receptor cell. Some mineral ions flow fast in xylem : (i) Nitrogen moves in plant in the form of inorganic ions `NO_2` and `NO_3`. But more Nitrogen flows in the form of Amino acid them organic compounds. (ii) Sulphur, phosphorus These both elements move in organic form in very SMALL quantity. (iii) From older organs of plants mineral ions are translocated fast. Minerals are transformed into new leaves from old falling leaves. In shed loving plants, minerals take place in other plants before falling of leaves.

Discussion

14809.	Question : Minerals enter a plant mainly by(a) diffusion(b) pressure flow(c) translocation(d) active transport
Answer» diffusion pressure flow translocation ACTIVE transport Answer :D

Discussion

14810.	Question : Minerals absorbed by the roots travel up the xylem. How do they reach the parts where they are needed most ? Do all the parts of the plant get the same amount of the minerals ?
Answer» Solution :Absorbed salts reach to various parts of the plant by transpiration through stem. Their main storage place is developing parts of the plant like apical and LATERAL meristematic tissue, mature leaves developing flowers, fruits, seeds and storage organs. Xylem tissue MOVES upward in TRANSPORT of ions by diffusion and active transport. While organic food is transported by phloem tissue. Translocation of ions is done from old parts of the plant to matured parts. Some elements like phosphorus, sulphur, nitrogen, potassium and other elements which are PRESENT in constituent elements they do not TRANSLOCATE. e.g. calcium.

Discussion

14811.	Question :Minerals are absorbed in
Answer» meristematic zone ROOT hair zone elongation zone root CAP zone Answer :C

Discussion

14812.	Question : ______mineral is required for structural cohesion of ribosomes.
Answer» `CA^(2+)` `H^(+)` `MG^(2+)` `CL^(-)` SOLUTION :`Mg^(2+)`

Discussion

14813.	Question : Millipedes differ from centipedes because :
Answer» centipedes generally have FEWER legs per segment millipede is herbivorous, and the CENTIPEDE is carnivorous large centipedes are dangerous to HANDLE but millipedesare SAFE all of the above are correct Answer :D

Discussion

14814.	Question : Milky water of tender coconut is
Answer» liquid gametes liquid ENDOSPERM liquid FEMALE gametophyte liquid embryo ANSWER :B

Discussion

14815.	Question : Migration exhibited by marine lampreys is
Answer» ocanodromous potamodromous CATADROMOUS ANADROMOUS ANSWER :D

Discussion

14816.	Question : Middle layer in the body wall of cnidarians is
Answer» ectoderm mesoglea endoderm mesoderm Answer :B

Discussion

14817.	Question : Middle lamellum is chemically rich in
Answer» Suberin Pectin Chitin Lignin ANSWER :B

Discussion

14818.	Question : Middle lamella mainly contains
Answer» Ca Mg Na K Answer :A

Discussion

14819.	Question : Middle lamella starts formation during
Answer» I-Phase Late metaphase Spindle apparatus Late anaphase Answer :D

Discussion

14820.	Question : Middle lamella contains
Answer» Chitin Lignin Pectin Cellulose Answer :C

Discussion

14821.	Question : Middle lamella is composed mainly of
Answer» Muramic ACID CALCIUM pectate Phosphoglycerides HEMICELLULOSE ANSWER :B

Discussion

14822.	Question : Micturition is carried out by a reflex.
Answer» ANSWER :T

Discussion

14823.	Question : Middle lamella :
Answer» SOLUTION :LOCATION : It is a layer made up of CALCIUM pectate in plant cell. Function: Keeps NEAR by cells in contacts, and HOLDS them.

Discussion

14824.	Question : Indicate whether the statements are true of false Mickturition is carried out by a reflex action.
Answer» ANSWER :TRUE

Discussion

14825.	Question :Micturition is carried out by a reflex.
Answer» ANSWER :TRUE

Discussion

14826.	Question : Microvilli of each retinular cell collectively form
Answer» rhadbome rhabdomere CRYSTALLINE CONE retinula ANSWER :B

Discussion

14827.	Question : Microvilli and Goblet cells are the modifications o f ...................
Answer» CUBOIDAL EPITHELIUM COLUMNAR epithelium SQUAMOUS epithelium ciliated epithelium Answer :B

Discussion

14828.	Question : Microtubules are the constituents of
Answer» Cilia, Flagella and Peroxisomes Spindle fibres, CENTRIOLES and Cilia Centrioles, Spindle fibres and Chromati Centrosome, NUCLEOSOME and Centrioles Answer :B

Discussion

14829.	Question : Microtubules are made of ____
Answer» Dyenin Tubin TUBULIN Nexin Solution :Tubulin

Discussion

14830.	Question : Microtubules are absent in
Answer» MITOCHONDRIA flagella spindle FIBRES CENTRIOLE. ANSWER :A

Discussion

14831.	Question : Microsporophylls and megasporophylls appeared first in this group of plants
Answer» BRYOPHYTES Dicots Pteridophytes Gymnosperms Answer :C

Discussion

14832.	Question : Microspores of the following plants are also called as pollen grains
Answer» PTERIDOPHYTES Pteridophytes and gymnosperms Only angiosperms Spermatophytes Answer :D

Discussion

14833.	Question : Microspores are produced in the multiples of four. Why?
Answer» Solution :Microspores are haploid spores PRODUCED from diploid microspores mother cells. Each microspores mother CELL (2n) undergoes MEIOSIS producing four microspores (n). Because a complete meiotic division yields 4 cells. THUS microspores are produced in MULTIPLES of four.

Discussion

14834.	Question : Microscopic angiospermic plant is
Answer» Eucalyptus Chlamydomonas Wolffa Chara Answer :C

Discussion

14835.	Question : Micropyle is found in
Answer» OVULE seed both ovule and seed fruit ANSWER :C

Discussion

14836.	Question : Micropyle in the ovule is formed by
Answer» OUTER INTEGUMENT inner integument both outer and inner integument outer integument and FUNICLE ANSWER :B

Discussion

14837.	Question : Micronutrients are
Answer» as important as MACRONUTRIENTS but are REQUIRED in SMALL amount less important that macronutrients callrd micro as they PLAY only a MINOR role in plant nutrition required great than 10mmol/Kg of dry matter Answer :A

Discussion

14838.	Question : Micronutrients are needed in very small amount because
Answer» most of them are mobile in the plant most function as cofactors in enzymes most are SUPPLIED in LARGE ENOUGH quantities in soil they play only a minor role in the HEALTH of the plant Answer :B

Discussion

14839.	Question : Micronutrients and Macronutrients.
Answer» SOLUTION :

Discussion

14840.	Question : Micronutrients and macronutrients of plants
Answer» Solution :The roots of green plants absorb a large number of elements from the soil. Some of these elements are ABSOLUTELY necessary for normal growth and development of the plant. These elements, said to be MACRONUTRIENTS, are potassium, calcium, magnesium, iron, carbon, hydrogen, oxygen, nitrogen, SULPHUR and phosphorus. Macronutrients must be present in plant TISSUES in concentration of at least one milligram per gram of dry matter. There are other elements which are specifically required by the plant in very minute quantities, and these elements are known as micronutrients. MANGANESE, copper, molybdenum, zinc and boron are essential micronutrients.

Discussion

14841.	Question :Microfilaments perform all the following functions, except
Answer» PROVIDE support to plasma MEMBRANE Involved in cyclosis Help in cell PLATE METHOD during cell division Help in pseudopodia formation Answer :C

Discussion

14842.	Question : Microfilaments are involed in
Answer» amoebiod MOVEMENT CILIARY movement MUSCULAR movement both (a) and (B) SOLUTION :N//A

Discussion

14843.	Question : Microelements are those nutrients which
Answer» MAY not be ESSENTIAL may be essential are not essential and REQUIRED in traces are essential and required in traces. Answer :D

Discussion

14844.	Question : microbiomolecules : filtrate : : macrobiomolecules : …………….
Answer» SOLUTION :RETENTATE

Discussion

14845.	Question : Micro-organism like ................ acts as apesticide, while ............... acts as a biofertilizer.
Answer» ANSWER :AGROBACTERIUM, ANABAENA

Discussion

14846.	Question : Michaelis constant K_(m) is equla to
Answer» `(K_(1))/(K_(2)-K_(3))` `(K_(1)+K_(2))/(K_(1))` `(K_(2)-K_(3))/(K_(1))` `(K_(1)-K_(2))/(K_(3))` ANSWER :B

Discussion

14847.	Question : Michaelis Menten Constant (K) is equal to
Answer» the rate of reaction the rate of enzymatic activity substrate CONCENTRATION at which the reaction attains HALF of its maximum VELOCITY substrate concentration at which the rate of reaction is maximum Answer :C

Discussion

14848.	Question : Mg and Fe are needed for plants in the
Answer» stomatal movement energy transfer chlorophyll synthesis carbohydrate translocation Answer :C

Discussion

14849.	Question : Method used to determine precise age of a fossil ____
Answer» SOLUTION :ABSOLUTE DATING

Discussion

14850.	Question : Method of dispersal in Amoeba is ……………… .
Answer» LOCOMOTION ENCYSTMENT SPORULATION BINARY fission Solution :Encystment

Discussion

Explore topic-wise InterviewSolutions in .

Question : Mitochondria and chloroplasts have their own DNA (genetic material). What is known about their fate during nuclear division like mitosis ?

Question : Mitochondria and chloroplast are (a) semi-autonomous organelles (b) formed by division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery Which one of the following options is correct?

Question : Mitochondria :

Question : Minimum number of archegonia seen in female gametophyte of gymnosperms is

Question : Minimum diversity is found in

Question : Minerals are present in the soil in sufficient amounts. Do plants need to adjust the type of solutes that reach the xylem? Which molecules help to adjust this? How do plants regulate the type and quantity of solutes that reach xylem ?

Question : Minerals are present in the soil in sufficient amounts. Do plants need to adjust the types of solutes that reach the xylem? Which molecules help to adjust this? How do plants regulate the type and quantity of solutes that reach xylem?

Question : Minerals are present in the soil in sufficient amounts. Do plants need to adjust the type of solutes that reach the xylem ? Which molecules help to adjust this ? How do plants regulate the type and quantity of solutes that reach xylem ?

Question : Minerals enter a plant mainly by(a) diffusion(b) pressure flow(c) translocation(d) active transport

Question : Minerals absorbed by the roots travel up the xylem. How do they reach the parts where they are needed most ? Do all the parts of the plant get the same amount of the minerals ?

Question :Minerals are absorbed in

Question : ______mineral is required for structural cohesion of ribosomes.

Question : Millipedes differ from centipedes because :

Question : Milky water of tender coconut is

Question : Migration exhibited by marine lampreys is

Question : Middle layer in the body wall of cnidarians is

Question : Middle lamellum is chemically rich in

Question : Middle lamella mainly contains

Question : Middle lamella starts formation during

Question : Middle lamella contains

Question : Middle lamella is composed mainly of

Question : Micturition is carried out by a reflex.

Question : Middle lamella :

Question : Indicate whether the statements are true of false Mickturition is carried out by a reflex action.

Question :Micturition is carried out by a reflex.

Question : Microvilli of each retinular cell collectively form

Question : Microvilli and Goblet cells are the modifications o f ...................

Question : Microtubules are the constituents of

Question : Microtubules are made of ____

Question : Microtubules are absent in

Question : Microsporophylls and megasporophylls appeared first in this group of plants

Question : Microspores of the following plants are also called as pollen grains

Question : Microspores are produced in the multiples of four. Why?

Question : Microscopic angiospermic plant is

Question : Micropyle is found in

Question : Micropyle in the ovule is formed by

Question : Micronutrients are

Question : Micronutrients are needed in very small amount because

Question : Micronutrients and Macronutrients.

Question : Micronutrients and macronutrients of plants

Question :Microfilaments perform all the following functions, except

Question : Microfilaments are involed in

Question : Microelements are those nutrients which

Question : microbiomolecules : filtrate : : macrobiomolecules : …………….

Question : Micro-organism like ................ acts as apesticide, while ............... acts as a biofertilizer.

Question : Michaelis constant K_(m) is equla to

Question : Michaelis Menten Constant (K) is equal to

Question : Mg and Fe are needed for plants in the

Question : Method used to determine precise age of a fossil ____

Question : Method of dispersal in Amoeba is ……………… .